{"id":21505,"date":"2026-08-19T20:37:16","date_gmt":"2026-08-19T12:37:16","guid":{"rendered":"https:\/\/lorentzzi.com\/?p=21505"},"modified":"2026-08-20T15:35:29","modified_gmt":"2026-08-20T07:35:29","slug":"smps-what-it-is-and-how-it-works","status":"publish","type":"post","link":"https:\/\/lorentzzi.com\/fr\/smps-what-it-is-and-how-it-works\/","title":{"rendered":"Alimentations \u00e0 d\u00e9coupage (SMPS) : d\u00e9finition et fonctionnement"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"21505\" class=\"elementor elementor-21505\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-35ab4e8 e-flex e-con-boxed e-con e-parent\" data-id=\"35ab4e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-975f063 elementor-widget elementor-widget-text-editor\" data-id=\"975f063\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">SMPS est l'abr\u00e9viation de \u00ab Switched-Mode Power Supply \u00bb (alimentation \u00e0 d\u00e9coupage), largement utilis\u00e9e dans les applications de contr\u00f4le industriel pour alimenter des charges en courant continu. Elle permet de convertir efficacement une tension alternative (CA) en tension continue (CC).<\/span><\/p><p><span style=\"font-weight: 400;\">Les alimentations \u00e0 d\u00e9coupage comptent parmi les <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/top-10-most-commonly-used-components-in-industrial-automation\/\"><span style=\"font-weight: 400;\">Les 10 composants les plus couramment utilis\u00e9s dans l'automatisation industrielle<\/span><\/a><\/span><span style=\"font-weight: 400;\">, alimentant divers appareils tels que des automates programmables, des capteurs de temp\u00e9rature, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/proximity-sensors\/\"><span style=\"font-weight: 400;\">capteurs de proximit\u00e9<\/span><\/a><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/safety-light-curtain-sensor\/\"><span style=\"font-weight: 400;\">barri\u00e8res immat\u00e9rielles de s\u00e9curit\u00e9<\/span><\/a><\/span><span style=\"font-weight: 400;\">, voyants lumineux, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/what-is-a-temperature-transmitter-a-comprehensive-explanation\/\"><span style=\"font-weight: 400;\">transmetteurs de temp\u00e9rature<\/span><\/a><\/span><span style=\"font-weight: 400;\">, \u00e9lectrovannes, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/tcx5-universal-pid-temperature-controller\/\"><span style=\"font-weight: 400;\">r\u00e9gulateurs de temp\u00e9rature<\/span><\/a><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/solid-state-relays\/\"><span style=\"font-weight: 400;\">relais \u00e0 semi-conducteurs<\/span><\/a><\/span><span style=\"font-weight: 400;\"> et diverses bandes lumineuses \u00e0 LED.<\/span><\/p><p><span style=\"font-weight: 400;\">Dans cet article de blog, vous apprendrez :<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Qu'est-ce qu'un SMPS ?<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comment \u00e7a marche.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Quelles charges peut-il tracter ?<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Types d'alimentations \u00e0 d\u00e9coupage.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Guide de s\u00e9lection des alimentations \u00e0 d\u00e9coupage.<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Allons maintenant plus loin dans le sujet.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bdb9995 elementor-widget elementor-widget-heading\" data-id=\"bdb9995\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Qu'est-ce qu'un SMPS ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6db8ba elementor-widget elementor-widget-text-editor\" data-id=\"d6db8ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">En r\u00e9sum\u00e9, une alimentation \u00e0 d\u00e9coupage (SMPS) est un convertisseur de tension qui transforme une tension alternative (CA) en une tension continue (CC) de valeur fixe. Ainsi, les adaptateurs d'ordinateurs portables, les chargeurs de t\u00e9l\u00e9phones portables et les pilotes LED peuvent tous \u00eatre consid\u00e9r\u00e9s comme des alimentations \u00e0 d\u00e9coupage.<\/span><\/p><p><span style=\"font-weight: 400;\">Sa tension d'entr\u00e9e peut \u00eatre une tension alternative monophas\u00e9e de 110 V ou 220 V, ou une tension alternative triphas\u00e9e de 380 V. Ces tensions d'entr\u00e9e sont converties en tension continue de 5 V, 12 V, 24 V ou 48 V par les circuits internes de l'alimentation \u00e0 d\u00e9coupage, selon la conception du produit.<\/span><\/p><p><span style=\"font-weight: 400;\">Dans la section suivante, nous expliquerons en d\u00e9tail le principe de fonctionnement d'une alimentation \u00e0 d\u00e9coupage.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9f35b72 elementor-widget elementor-widget-heading\" data-id=\"9f35b72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Comment fonctionne un alimentateur \u00e0 d\u00e9coupage ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a2179d1 elementor-widget elementor-widget-image\" data-id=\"a2179d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram.jpg\" class=\"attachment-large size-large wp-image-21529\" alt=\"AC220V input DC24V output switched-mode power supply circuit diagram\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/AC220V-input-DC24V-output-switched-mode-power-supply-circuit-diagram-600x300.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b037a49 elementor-widget elementor-widget-text-editor\" data-id=\"b037a49\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Le circuit d'alimentation \u00e0 d\u00e9coupage (SMPS) comprend 6 \u00e9tapes : alimentation secteur CA \u2192 filtre EMI \u2192 pont redresseur + condensateur \u00e9lectrolytique (bus 310 V CC ou 150 V CC) \u2192 commutateur PWM + transformateur haute fr\u00e9quence \u2192 redressement et filtrage du c\u00f4t\u00e9 secondaire \u2192 tension de sortie CC stable.<\/span><\/p><p><span style=\"font-weight: 400;\">Examinons chacune de ces \u00e9tapes de plus pr\u00e8s.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5b7a0b3 elementor-widget elementor-widget-heading\" data-id=\"5b7a0b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Alimentation secteur CA<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef133e5 elementor-widget elementor-widget-text-editor\" data-id=\"ef133e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Il faut raccorder une tension de 110 V CA, 220 V CA ou 380 V CA aux bornes d'entr\u00e9e de l'alimentation \u00e0 d\u00e9coupage.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45282ec elementor-widget elementor-widget-heading\" data-id=\"45282ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Filtre EMI<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30986a8 elementor-widget elementor-widget-text-editor\" data-id=\"30986a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Au cours de cette \u00e9tape, la tension alternative sera filtr\u00e9e afin d'obtenir une alimentation en courant alternatif propre, tandis que les autres signaux parasites (tels que les bruits \u00e9lectromagn\u00e9tiques \u00e0 haute fr\u00e9quence) seront filtr\u00e9s et absorb\u00e9s.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a0c9307 elementor-widget elementor-widget-heading\" data-id=\"a0c9307\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Pont redresseur + condensateur \u00e9lectrolytique (bus 310 V CC ou 150 V CC)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c3e1117 elementor-widget elementor-widget-image\" data-id=\"c3e1117\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers.jpg\" class=\"attachment-large size-large wp-image-21497\" alt=\"Forme d&#039;onde de sortie via des redresseurs en pont\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Bridge-Rectifiers-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f22f8f elementor-widget elementor-widget-text-editor\" data-id=\"3f22f8f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Dans cette section, la tension d'entr\u00e9e est de 220 V CA (Remarque : la tension mentionn\u00e9e ici est de 220 V CA, soit la valeur efficace du r\u00e9seau \u00e9lectrique. Sa valeur de cr\u00eate est de 220 \u00d7 \u221a2 = 310 V.). Cette tension alternative est convertie en 310 V CC.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5849b25 elementor-widget elementor-widget-image\" data-id=\"5849b25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor.jpg\" class=\"attachment-large size-large wp-image-21495\" alt=\"Forme d&#039;onde de sortie via un condensateur\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-through-Capoacitor-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab6548c elementor-widget elementor-widget-text-editor\" data-id=\"ab6548c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">La forme d'onde concern\u00e9e est divis\u00e9e en deux \u00e9tapes, comme illustr\u00e9 et d\u00e9crit ci-dessous :<\/span><\/p><ol><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Le courant alternatif traverse un redresseur en pont complet, qui transforme le courant alternatif, successivement positif et n\u00e9gatif, en un courant continu puls\u00e9 unidirectionnel ;<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Apr\u00e8s filtrage par un condensateur \u00e9lectrolytique de grande capacit\u00e9, on obtient une tension continue lisse de 310 V.<\/span><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c122e0 elementor-widget elementor-widget-heading\" data-id=\"0c122e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Commutateur PWM + transformateur haute fr\u00e9quence<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0ec2415 elementor-widget elementor-widget-image\" data-id=\"0ec2415\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET.jpg\" class=\"attachment-large size-large wp-image-21500\" alt=\"Forme d&#039;onde de sortie via un MOSFET haute fr\u00e9quence\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-High-frequency-MOSFET-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7244e4a elementor-widget elementor-widget-text-editor\" data-id=\"7244e4a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Nous disposons d\u00e9sormais d'une tension de 310 V CC. Ce n'est pas la tension de sortie souhait\u00e9e ; nous avons donc besoin d'un transformateur pour l'abaisser \u00e0 12 V, 24 V ou 5 V CC.<\/span><\/p><p><span style=\"font-weight: 400;\">Cependant, aucun transformateur ne peut convertir directement un courant continu stable. En effet, le courant continu g\u00e9n\u00e8re un flux statique \u00e0 l'int\u00e9rieur du transformateur, ce qui emp\u00eache l'induction d'une tension du c\u00f4t\u00e9 secondaire n\u00e9cessaire \u00e0 la transformation de tension.<\/span><\/p><p><span style=\"font-weight: 400;\">Comment r\u00e9soudre ce probl\u00e8me ?<\/span><\/p><p><span style=\"font-weight: 400;\">La solution consiste \u00e0 utiliser un MOSFET haute fr\u00e9quence pour convertir le courant continu statique en impulsions de courant continu haute fr\u00e9quence ; vous pouvez voir ces impulsions de courant continu ci-dessous :<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0143d0f elementor-widget elementor-widget-image\" data-id=\"0143d0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer.jpg\" class=\"attachment-large size-large wp-image-21503\" alt=\"Forme d&#039;onde de sortie via un transformateur\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2f25083 elementor-widget elementor-widget-text-editor\" data-id=\"2f25083\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Cette m\u00e9thode permet de convertir une tension continue \u00e9lev\u00e9e en une tension faible. Il faut toutefois transformer les impulsions alternatives provenant du transformateur en courant continu positif unidirectionnel.<\/span><\/p><p><span style=\"font-weight: 400;\">Nous passons maintenant \u00e0 l'\u00e9tape suivante : le redressement et le filtrage c\u00f4t\u00e9 secondaire.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f032159 elementor-widget elementor-widget-heading\" data-id=\"f032159\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">5. Redressement et filtrage du c\u00f4t\u00e9 secondaire<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19eeb9e elementor-widget elementor-widget-text-editor\" data-id=\"19eeb9e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Ce circuit permet de convertir une tension haute tension de 310 V CC \u00e0 onde carr\u00e9e en une tension basse tension de 5 V CC, 12 V CC ou 24 V CC \u00e0 onde carr\u00e9e.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8a1aa9 elementor-widget elementor-widget-image\" data-id=\"b8a1aa9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side.jpg\" class=\"attachment-large size-large wp-image-21501\" alt=\"Forme d&#039;onde de sortie du c\u00f4t\u00e9 secondaire du transformateur\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-Secondary-Side-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36dd1c0 elementor-widget elementor-widget-text-editor\" data-id=\"36dd1c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">L'\u00e9tape suivante consiste \u00e0 inverser la demi-p\u00e9riode n\u00e9gative de l'onde carr\u00e9e pour la transformer en demi-p\u00e9riode positive, de sorte que la tension de sortie totale devienne une tension continue. Pour ce faire, on peut utiliser un autre circuit redresseur.<\/span><\/p><p><span style=\"font-weight: 400;\">Une fois les autres bruits \u00e9limin\u00e9s, la tension de sortie sera une tension continue faible et stable.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c753d2 elementor-widget elementor-widget-image\" data-id=\"2c753d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter.jpg\" class=\"attachment-large size-large wp-image-21504\" alt=\"Forme d&#039;onde de sortie via le transformateur, le pont redresseur final et le filtre\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Output-Waveform-Through-Transformer-through-The-Final-Bridge-Rectifier-and-Filter-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-066a502 elementor-widget elementor-widget-heading\" data-id=\"066a502\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Types d'alimentations \u00e0 d\u00e9coupage (SMPS)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d26436d elementor-widget elementor-widget-text-editor\" data-id=\"d26436d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">D'apr\u00e8s notre exp\u00e9rience, les alimentations \u00e0 d\u00e9coupage peuvent \u00eatre class\u00e9es en trois grandes cat\u00e9gories : les alimentations \u00e0 d\u00e9coupage \u00e0 tension de sortie variable, les alimentations \u00e0 d\u00e9coupage mont\u00e9es sur rail DIN et les alimentations \u00e0 d\u00e9coupage standard \u00e0 fixation par vis. Nous pr\u00e9senterons chacune d'entre elles dans la section suivante.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90e7e42 elementor-widget elementor-widget-heading\" data-id=\"90e7e42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Alimentation \u00e0 d\u00e9coupage \u00e0 tension de sortie variable<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2823569 elementor-widget elementor-widget-image\" data-id=\"2823569\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS.jpg\" class=\"attachment-large size-large wp-image-21499\" alt=\"Alimentation \u00e0 d\u00e9coupage \u00e0 tension de sortie variable\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Variable-output-SMPS-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2602832 elementor-widget elementor-widget-text-editor\" data-id=\"2602832\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Les alimentations \u00e0 d\u00e9coupage \u00e0 tension de sortie variable (SMPS), \u00e9galement appel\u00e9es alimentations CC variables, permettent d'obtenir la tension continue souhait\u00e9e en r\u00e9glant un bouton situ\u00e9 sur l'appareil.<\/span><\/p><p><span style=\"font-weight: 400;\">Leur courbe de sortie en courant continu variable permet aux utilisateurs d'obtenir facilement la tension requise, mais c'est pr\u00e9cis\u00e9ment pour cette raison que leur prix est nettement plus \u00e9lev\u00e9 que celui des deux types d'alimentations \u00e0 d\u00e9coupage que nous allons pr\u00e9senter ci-dessous.<\/span><\/p><p><span style=\"font-weight: 400;\">C'est pourquoi les alimentations \u00e0 d\u00e9coupage \u00e0 tension de sortie variable sont principalement utilis\u00e9es dans les laboratoires et les \u00e9quipements de test, et sont rarement pr\u00e9sentes sur les cha\u00eenes de production proprement dites.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af025a5 elementor-widget elementor-widget-heading\" data-id=\"af025a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Alimentation \u00e0 d\u00e9coupage sur rail DIN<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ff864e elementor-widget elementor-widget-image\" data-id=\"8ff864e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS.jpg\" class=\"attachment-large size-large wp-image-21496\" alt=\"Alimentation \u00e0 d\u00e9coupage sur rail DIN\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/DIN-rail-SMPS-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b3667b1 elementor-widget elementor-widget-text-editor\" data-id=\"b3667b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Les alimentations \u00e0 d\u00e9coupage mont\u00e9es sur rail DIN sont dot\u00e9es d'un syst\u00e8me de fixation sur rail DIN \u00e0 l'arri\u00e8re, ce qui permet aux utilisateurs de les installer facilement sur des rails DIN de 35 mm.<\/span><\/p><p><span style=\"font-weight: 400;\">Parmi ceux-ci, les mod\u00e8les les plus populaires sont notamment ceux des s\u00e9ries DR et NDR.<\/span><\/p><p><span style=\"font-weight: 400;\">Si l'on compare les deux gammes d'alimentations \u00e0 d\u00e9coupage de m\u00eame puissance de sortie, la gamme NDR est plus fine que la gamme DR.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8227a94 elementor-widget elementor-widget-heading\" data-id=\"8227a94\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Alimentation \u00e0 d\u00e9coupage (SMPS) \u00e0 fixation par vis<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a9ef32 elementor-widget elementor-widget-image\" data-id=\"4a9ef32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS.jpg\" class=\"attachment-large size-large wp-image-21498\" alt=\"Alimentation \u00e0 d\u00e9coupage (SMPS) \u00e0 fixation par vis\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Screw-fixed-SMPS-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cdbb487 elementor-widget elementor-widget-text-editor\" data-id=\"cdbb487\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Un autre type d'alimentation \u00e0 d\u00e9coupage tr\u00e8s r\u00e9pandu est l'alimentation \u00e0 d\u00e9coupage \u00e0 fixation par vis, qui tire son nom de son mode de fixation.<\/span><\/p><p><span style=\"font-weight: 400;\">Les alimentations \u00e0 d\u00e9coupage \u00e0 fixation par vis comprennent les s\u00e9ries S, D, SP et MS. Vous pouvez cliquer sur ce lien pour t\u00e9l\u00e9charger notre catalogue de produits d'alimentations \u00e0 d\u00e9coupage : <\/span><a href=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switching-Mode-Power-Supply-Catalog.pdf\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #ff0000;\"><b>Catalogue des alimentations \u00e0 d\u00e9coupage Lorentzzi<\/b><\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">Les alimentations \u00e0 d\u00e9coupage \u00e0 montage sur vis sont couramment utilis\u00e9es dans les syst\u00e8mes de commande d'\u00e9clairage LED, notamment pour alimenter des bandes lumineuses LED, des lampadaires, etc.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3191541 elementor-widget elementor-widget-heading\" data-id=\"3191541\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Quels appareils peuvent \u00eatre aliment\u00e9s par l'alimentation \u00e0 d\u00e9coupage ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-206ec88 elementor-widget elementor-widget-text-editor\" data-id=\"206ec88\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Les alimentations \u00e0 d\u00e9coupage (SMPS) alimentent une large gamme d'appareils \u00e9lectroniques fonctionnant en courant continu, notamment :<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce74d07 elementor-widget elementor-widget-heading\" data-id=\"ce74d07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. \u00c9quipements d'automatisation industrielle<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b93a8de elementor-widget elementor-widget-text-editor\" data-id=\"b93a8de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Par exemple : <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/proximity-sensors\/\"><span style=\"font-weight: 400;\">divers capteurs de proximit\u00e9<\/span><\/a><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/safety-light-curtain-sensor\/\"><span style=\"font-weight: 400;\">barri\u00e8res immat\u00e9rielles de s\u00e9curit\u00e9<\/span><\/a><\/span><span style=\"font-weight: 400;\">, automates programmables, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/general-purpose-relay-what-is-it-and-how-does-it-work\/\"><span style=\"font-weight: 400;\">relais \u00e0 usage g\u00e9n\u00e9ral (relais interm\u00e9diaires)<\/span><\/a><\/span><span style=\"font-weight: 400;\">, \u00e9lectrovannes, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/products\/accessories\/cjx2-contactor\/\"><span style=\"font-weight: 400;\">Contacteurs \u00e0 bobine \u00e0 courant continu<\/span><\/a><\/span><span style=\"font-weight: 400;\">, modules de servocommande et IHM \u00e0 courant continu.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18b5fb5 elementor-widget elementor-widget-heading\" data-id=\"18b5fb5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. \u00c9clairage<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9fe61a3 elementor-widget elementor-widget-image\" data-id=\"9fe61a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies.jpg\" class=\"attachment-large size-large wp-image-21502\" alt=\"Les bandes LED pouvant \u00eatre aliment\u00e9es par des alimentations \u00e0 d\u00e9coupage\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/The-LED-Strips-That-Can-Be-Operated-by-Switching-Mode-Power-Supplies-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e28df8d elementor-widget elementor-widget-text-editor\" data-id=\"e28df8d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Bandes LED et luminaires LED \u00e0 tension constante.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eb32c16 elementor-widget elementor-widget-heading\" data-id=\"eb32c16\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Mat\u00e9riel de communication et de r\u00e9seau<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a195e1c elementor-widget elementor-widget-text-editor\" data-id=\"a195e1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Routeurs, commutateurs, syst\u00e8mes de vid\u00e9osurveillance et \u00e9quipements terminaux de r\u00e9seau.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6210e33 elementor-widget elementor-widget-heading\" data-id=\"6210e33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. \u00c9lectronique grand public et professionnelle<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e39cdd3 elementor-widget elementor-widget-text-editor\" data-id=\"e39cdd3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Chargeurs de batterie, chargeurs de t\u00e9l\u00e9phone, adaptateurs pour ordinateurs portables, etc.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-993c680 elementor-widget elementor-widget-heading\" data-id=\"993c680\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Comment choisir l'alimentation \u00e0 d\u00e9coupage adapt\u00e9e \u00e0 votre application ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f6db2c elementor-widget elementor-widget-text-editor\" data-id=\"8f6db2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Choisir l'alimentation \u00e0 d\u00e9coupage adapt\u00e9e \u00e0 votre charge peut vous \u00e9viter bien des soucis.<\/span><\/p><p><span style=\"font-weight: 400;\">En r\u00e9sum\u00e9, le choix d'un bloc d'alimentation \u00e0 d\u00e9coupage adapt\u00e9 peut se d\u00e9composer en quatre \u00e9tapes : 1. V\u00e9rifier la puissance nominale de la charge ; 2. V\u00e9rifier la tension nominale de la charge ; 3. Pr\u00e9voir une marge suffisante pour la charge ; 4. V\u00e9rifier le mode d'installation.<\/span><\/p><p><span style=\"font-weight: 400;\">Dans la section suivante, nous allons vous expliquer la marche \u00e0 suivre \u00e9tape par \u00e9tape.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78e1691 elementor-widget elementor-widget-heading\" data-id=\"78e1691\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. V\u00e9rifier la puissance nominale de la charge<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85635c0 elementor-widget elementor-widget-text-editor\" data-id=\"85635c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Vous pouvez d\u00e9terminer la puissance nominale d'une charge en courant continu en consultant sa plaque signal\u00e9tique ; si vous ne la connaissez pas, voici quelques indications : pour la plupart des capteurs, la puissance nominale est g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 10 W ; pour les charges capacitives telles que les \u00e9lectrovannes, la puissance nominale est g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 30 W, mais leur puissance de d\u00e9marrage est g\u00e9n\u00e9ralement 2 \u00e0 3 fois sup\u00e9rieure \u00e0 leur puissance nominale ; il est donc pr\u00e9f\u00e9rable d'utiliser une alimentation \u00e0 d\u00e9coupage de 100 W.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d24ee99 elementor-widget elementor-widget-heading\" data-id=\"d24ee99\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. V\u00e9rifiez la tension nominale de la charge<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-edbbd91 elementor-widget elementor-widget-text-editor\" data-id=\"edbbd91\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Vous pouvez \u00e9galement d\u00e9terminer la tension nominale de la charge en consultant la plaque signal\u00e9tique. Par exemple, si votre charge est de 24 V CC, vous devez choisir une alimentation \u00e0 d\u00e9coupage avec une sortie de 24 V CC.<\/span><\/p><p><span style=\"font-weight: 400;\">Si vous choisissez une tension de sortie inadapt\u00e9e, cela pourrait entra\u00eener une surchauffe des bobines de votre charge en courant continu et provoquer leur grillage.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8ad6b1 elementor-widget elementor-widget-heading\" data-id=\"c8ad6b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Pr\u00e9voyez une marge suffisante pour la charge<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-edf2dac elementor-widget elementor-widget-text-editor\" data-id=\"edf2dac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Pour les charges stables et non inductives (capteurs, barri\u00e8res immat\u00e9rielles de s\u00e9curit\u00e9, r\u00e9gulateurs de temp\u00e9rature) : pr\u00e9voir une marge de puissance de 20%~30%.<\/span><\/p><p><span style=\"font-weight: 400;\">Pour les charges inductives (\u00e9lectrovannes, relais) : pr\u00e9voir une marge de puissance de 40%~50%<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d76004 elementor-widget elementor-widget-heading\" data-id=\"4d76004\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Confirmer la m\u00e9thode d'installation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d100bbb elementor-widget elementor-widget-text-editor\" data-id=\"d100bbb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Enfin, validez votre plan d'installation de l'alimentation \u00e0 d\u00e9coupage (SMPS) dans le rack.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Si vous souhaitez une installation rapide et facile, optez pour un bloc d'alimentation \u00e0 d\u00e9coupage mont\u00e9 sur rail DIN ; si votre rack ne dispose pas de rails DIN, choisissez un bloc d'alimentation \u00e0 d\u00e9coupage \u00e0 fixation par vis et fixez-le solidement dans le rack \u00e0 l'aide de quatre vis.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb526c6 elementor-widget elementor-widget-heading\" data-id=\"bb526c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42c0e5a elementor-widget elementor-widget-image\" data-id=\"42c0e5a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijg4MzMiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action.jpg\" class=\"attachment-large size-large wp-image-21521\" alt=\"Lorentzzi Switched-Mode Power Supply Call to Action\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/08\/Lorentzzi-Switched-Mode-Power-Supply-Call-to-Action-600x300.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11ce10e elementor-widget elementor-widget-text-editor\" data-id=\"11ce10e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">En r\u00e9sum\u00e9, les alimentations \u00e0 d\u00e9coupage sont largement utilis\u00e9es dans le domaine du contr\u00f4le industriel, o\u00f9 elles permettent de fournir une alimentation en courant continu stable \u00e0 des charges en courant continu \u00e0 partir d'une alimentation en courant alternatif.<\/span><\/p><p><span style=\"font-weight: 400;\">Si vous avez encore des questions concernant les alimentations \u00e0 d\u00e9coupage (SMPS) ou si vous recherchez un fournisseur chinois capable de produire des alimentations \u00e0 d\u00e9coupage de haute qualit\u00e9, vous pouvez envoyer vos questions ou demandes de renseignements \u00e0 <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"mailto:shonxu@lorentzzi.com\"><span style=\"font-weight: 400;\">shonxu@lorentzzi.com<\/span><\/a><\/span><span style=\"font-weight: 400;\">, et le service commercial de <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/\"><b>Lorentzzi Electric<\/b><\/a><\/span><span style=\"font-weight: 400;\"> Nous vous contacterons sous peu.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>SMPS is an abbreviation for Switched-Mode Power Supply, widely used in industrial control applications to drive DC loads. It can effectively convert alternating current (AC) voltage to direct current (DC) voltage. Switching power supplies are one of the top 10 commonly used components in industrial automation, providing power to various devices such as PLCs, temperature [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21494,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[110],"tags":[],"class_list":["post-21505","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sensor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>SMPS: What It Is and How It Works<\/title>\n<meta name=\"description\" content=\"In this blog post, we will introduce the definition, working principle, types, and selection guidelines of SMPS. 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