{"id":18808,"date":"2026-10-10T17:04:50","date_gmt":"2026-10-10T09:04:50","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/"},"modified":"2026-10-10T17:04:50","modified_gmt":"2026-10-10T09:04:50","slug":"power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/","title":{"rendered":"Power Supply Efficiency at Part Load: Ask for a Curve That Matches the Machine Duty Cycle"},"content":{"rendered":"<p class=\"quick-answer\">To compare power supply efficiency at part load, ask for input and output power at the operating points your machine actually uses. A single published efficiency value is not a curve, and a machine that spends most of its time at a small control load cannot be evaluated only at rated output. Procurement needs a comparable duty-cycle evidence packet\u2014not an extrapolated percentage.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-application-a-2.png?quality=85&strip=all\" alt=\"Power Supply Efficiency at Part Load: Ask for a Curve That Matches the Machine Duty Cycle  title=\" width=\"1536\" height=\"1024\" power supply efficiency at part load: ask for curve that matches the machine duty cycle title =\"\"><figcaption>Source-referenced mechanical-fit inspection in a dry component-inspection control bay, before this LRS-150-12 is terminated or energized. The thin rectangular guard, straight terminal block and low adjustment region follow the authentic front view. The case rests flat on the steel equipment deck; the visible front fastener uses the drawing&#8217;s clearance-hole position, not an invented foot or DIN mount. This illustration is not an efficiency test or equipment acceptance result.<\/figcaption><\/figure>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Tabla de contenido<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar tabla de contenidos\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Palanca<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Start_with_machine_states_not_a_preferred_power_rating\" >Start with machine states, not a preferred power rating<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#The_LRS-150-12_is_an_evidence_example_not_a_measured_curve\" >The LRS-150-12 is an evidence example, not a measured curve<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Request_a_table_that_can_be_compared\" >Request a table that can be compared<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Weight_energy_by_the_real_duty_cycle\" >Weight energy by the real duty cycle<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Do_not_trade_away_electrical_fit_for_a_percentage\" >Do not trade away electrical fit for a percentage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Keep_document_conflicts_visible\" >Keep document conflicts visible<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Frequently_asked_questions\" >Frequently asked questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Can_the_published_875_be_used_at_every_load\" >Can the published 87.5% be used at every load?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Is_choosing_a_larger_supply_always_less_efficient_at_a_small_load\" >Is choosing a larger supply always less efficient at a small load?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#What_if_the_supplier_has_no_part-load_data\" >What if the supplier has no part-load data?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wehopower.com\/es\/news\/power-supply-efficiency-at-part-load-ask-for-a-curve-that-matches-the-machine-duty-cycle\/#Sources_and_boundaries\" >Sources and boundaries<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Start_with_machine_states_not_a_preferred_power_rating\"><\/span>Start with machine states, not a preferred power rating<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>List the states that have different auxiliary demand: controls awake before production, active handling, waiting for an upstream process, and any permitted standby state. Record the duration and real output demand of each. A motor or heater branch should not be casually counted as a load on the auxiliary supply just because it is in the same machine.<\/p>\n<p>The useful question is: which documented supply performs adequately at those specific states? \u201cMost efficient\u201d is incomplete unless the compared input, load, ambient and measurement methods are comparable. Do not turn a tiny sample from one operating point into an overall ranking.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_LRS-150-12_is_an_evidence_example_not_a_measured_curve\"><\/span>The LRS-150-12 is an evidence example, not a measured curve<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The WEHO LRS-150 table identifies the 12V model at up to 12.5A and lists 87.5% in its efficiency row. The authentic photographed unit agrees on its nominal 12V12.5A output. Neither the adopted product-page row nor the approved sheet supplies a complete part-load efficiency curve. Therefore this article does not assign efficiencies to 10%,25%,50% or 75% load.<\/p>\n<p>This distinction matters even when the table value looks precise. A percentage can identify a documented point or an entry to clarify with the supplier. It cannot provide a missing curve\u2019s shape, low-load loss or standby consumption. Nor does the generic series name prove that every voltage variant has the same efficiency behavior.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-6.png?quality=85&strip=all\" alt=\"Power Supply Efficiency at Part Load: Ask for a Curve That Matches the Machine Duty Cycle  title=\" width=\"1536\" height=\"1024\" power supply efficiency at part load: ask for curve that matches the machine duty cycle title =\"\"><figcaption>Selection concept only. The illustration deliberately contains no invented efficiency curve or measured machine load.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Request_a_table_that_can_be_compared\"><\/span>Request a table that can be compared<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For each relevant operating state, ask the supplier or qualified test team to identify the input condition, stabilized output voltage\/current, true input power, output power, ambient condition and measurement uncertainty. Keep the delivered model and document revision on every record. Include low-load or standby behavior if those states materially affect the equipment\u2019s operating time.<\/p>\n<table>\n<thead>\n<tr>\n<th>Record field<\/th>\n<th>Why procurement needs it<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Full model and revision<\/td>\n<td>Prevents mixing voltage variants or changed hardware.<\/td>\n<\/tr>\n<tr>\n<td>Actual input condition<\/td>\n<td>Separates supply comparisons taken on different AC conditions.<\/td>\n<\/tr>\n<tr>\n<td>Output power and operating state<\/td>\n<td>Connects the observation to the machine duty cycle.<\/td>\n<\/tr>\n<tr>\n<td>Input power method<\/td>\n<td>Clarifies what the efficiency calculation uses.<\/td>\n<\/tr>\n<tr>\n<td>Temperature and stabilization<\/td>\n<td>Distinguishes a comparable steady record from a transient observation.<\/td>\n<\/tr>\n<tr>\n<td>Uncertainty and repeat count<\/td>\n<td>Keeps small apparent differences from becoming unsupported claims.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Efficiency at a defined point is output power divided by input power. For a DC output, the adopted voltage and current observations must correspond to that same point. Have qualified personnel choose suitable input-power instrumentation and safe test arrangements; ordinary current readings alone do not automatically establish true AC input power.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Weight_energy_by_the_real_duty_cycle\"><\/span>Weight energy by the real duty cycle<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For a state lasting a known interval, input energy depends on its input power and duration. Add the state energies to understand a documented cycle. Do not take an unweighted average of percentages and call it the machine\u2019s energy efficiency: different states may transfer very different amounts of energy.<\/p>\n<p>If only one state has been measured, label the conclusion accordingly. If the standby architecture changes between designs, describe that change separately rather than attributing every difference to the power supply. A calculation example with hypothetical values may explain a method, but it is not a measurement of the pictured WEHO unit; this guide intentionally does not fabricate such a result.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-b-2.png?quality=85&strip=all\" alt=\"Power Supply Efficiency at Part Load: Ask for a Curve That Matches the Machine Duty Cycle  title=\" width=\"1536\" height=\"1024\" power supply efficiency at part load: ask for curve that matches the machine duty cycle title =\"\"><figcaption>A second application relationship: a separate auxiliary-control compartment beside an engraving cell. The 12V branch is not presented as spindle or motor power. The steel plate and equipment layout differ from the inspection example; supplied-revision mounting requirements still govern.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Do_not_trade_away_electrical_fit_for_a_percentage\"><\/span>Do not trade away electrical fit for a percentage<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>An efficiency comparison follows a successful fit check. Confirm the real voltage window, steady and changing demand, permitted input condition, protection behavior, environmental exposure and installation constraints. A promising percentage cannot fix an incorrect output voltage, unknown peak demand or unsuitable enclosure.<\/p>\n<p>The pictured LRS-150-12 is a shallow enclosed chassis:159mm along the roof\u2019s long axis,97mm across the terminal edge and 30mm from base to roof. Its mechanical drawing gives threaded equipment-plate fixing features; it is not a DIN-rail model. Avoid attaching it to a rail merely because nearby control components use rails.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Keep_document_conflicts_visible\"><\/span>Keep document conflicts visible<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The actual photograph reads AC INPUT100\u2013240VAC3.0A50\/60Hz. The approved sheet and public page contain different input-range wording, including a public switched-input description that is not reflected by an invented switch on this source unit. Do not combine those statements into a new operating specification. Obtain the applicable supplied-revision instructions before acceptance; preserve the real nameplate as photographed.<\/p>\n<figure><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-product-detail-2.png?quality=85&strip=all\" alt=\"Power Supply Efficiency at Part Load: Ask for a Curve That Matches the Machine Duty Cycle  title=\" width=\"1536\" height=\"1024\" power supply efficiency at part load: ask for curve that matches the machine duty cycle title =\"\"><figcaption>Source-based detail of the authentic full model, output markings, honeycomb casing and guarded seven-position terminal edge. No new label, switch or efficiency marking has been added.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_asked_questions\"><\/span>Frequently asked questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Can_the_published_875_be_used_at_every_load\"><\/span>Can the published 87.5% be used at every load?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No part-load curve was adopted here. Treat it as the published table entry and request the applicable conditions and additional points.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_choosing_a_larger_supply_always_less_efficient_at_a_small_load\"><\/span>Is choosing a larger supply always less efficient at a small load?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A general assumption is not a model comparison. Obtain comparable evidence at the real load and input, then consider the rest of the fit requirements.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_if_the_supplier_has_no_part-load_data\"><\/span>What if the supplier has no part-load data?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Record that evidence gap. Agree a safe, qualified acceptance method or select a candidate with sufficient comparable data; do not substitute invented curve points.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Sources_and_boundaries\"><\/span>Sources and boundaries<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/www.wehopower.com\/es\/product\/150w-ac-dc-switching-power-supply\/\">WEHO LRS-150 English product page<\/a>, reviewed 8 October 2026; exact enterprise-drive LRS-150\/\u4e3b\u56fe.jpg and \u7ec6\u8282.jpg; full approved LRS-150 specification and drawing. No efficiency measurement, product ranking or machine compatibility test is reported.<\/p>","protected":false},"excerpt":{"rendered":"<p>A duty-cycle evidence checklist for comparing auxiliary-control supplies without extrapolating a single efficiency number.<\/p>","protected":false},"author":2,"featured_media":18804,"parent":0,"menu_order":28,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,284],"class_list":["post-18808","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-product-articles","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/news\/18808","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/comments?post=18808"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/news\/18808\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/media\/18804"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/media?parent=18808"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/es\/wp-json\/wp\/v2\/news_category?post=18808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}