{"id":100079,"date":"2026-02-15T20:15:28","date_gmt":"2026-02-15T20:15:28","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100079"},"modified":"2026-07-12T02:00:07","modified_gmt":"2026-07-12T02:00:07","slug":"drive-efficiency-calculator","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/tr\/calculators\/drive-efficiency-calculator\/","title":{"rendered":"Cascade Drive Efficiency | Forward &#038; Reverse Power"},"content":{"rendered":"\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Cascade Drive Efficiency\",\"description\":\"Multiply one to five measured or specified stage efficiencies and solve output power from input power or required input from output power.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/drive-efficiency-calculator\/\",\"applicationCategory\":\"Engineering 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strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}\r\n.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\r\n.vc-stage-row{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;align-items:end;margin-bottom:10px;padding:12px;background:var(--vc-surface-alt);border:1px solid var(--vc-border-light);border-radius:6px}.vc-stage-label{font-family:var(--vc-mono);font-size:11px;font-weight:600;color:var(--vc-accent);margin-bottom:4px}.vc-remove-btn{padding:8px 10px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:600;cursor:pointer;color:var(--vc-red);transition:all .15s}.vc-remove-btn:hover{background:var(--vc-red-light);border-color:var(--vc-red)}.vc-add-btn{padding:8px 14px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:600;cursor:pointer;transition:all .15s}.vc-add-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent)}\r\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\r\n<\/style>\r\n<div class=\"vc-calculator\" id=\"vc-drive\"><header class=\"vc-header\"><p class=\"vc-header-eyebrow\">Strict cascade power balance<\/p><h1 class=\"vc-header-title\">Cascade Drive Efficiency<\/h1><p class=\"vc-header-subtitle\">Combine one to five stage efficiencies from the same operating point. Calculate efficiency alone, output power from input power, or required input power from required output.<\/p><div class=\"vc-badges\"><span class=\"vc-badge\">\u03b7=\u03a0\u03b7\u1d62<\/span><span class=\"vc-badge\">Forward\/reverse power<\/span><span class=\"vc-badge\">No nominal presets<\/span><\/div><\/header>\r\n<div class=\"vc-card\"><form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\"><div class=\"vc-form-grid\"><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-mode\">Calculation mode<\/label><select class=\"vc-select\" id=\"vc-mode\"><option value=\"efficiency\">Efficiency only<\/option><option value=\"forward\">Output from input power<\/option><option value=\"reverse\">Required input from output power<\/option><\/select><\/div><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-count\">Active stages<\/label><select class=\"vc-select\" id=\"vc-count\"><option value=\"1\">1<\/option><option value=\"2\">2<\/option><option value=\"3\">3<\/option><option value=\"4\">4<\/option><option value=\"5\">5<\/option><\/select><\/div><div class=\"vc-field\" id=\"vc-power-row\" style=\"display:none\"><label class=\"vc-label\" for=\"vc-power\" id=\"vc-power-label\">Input power <span class=\"vc-label-hint\">(kW; &gt;0)<\/span><\/label><input class=\"vc-input\" id=\"vc-power\" type=\"text\" inputmode=\"decimal\"><\/div><div class=\"vc-field vc-stage-field\" data-stage=\"1\"><label class=\"vc-label\" for=\"vc-e1\">Stage 1 efficiency \u03b7<sub>1<\/sub> <span class=\"vc-label-hint\">(&gt;0\u2026100%)<\/span><\/label><input class=\"vc-input vc-eff\" id=\"vc-e1\" type=\"text\" inputmode=\"decimal\"><\/div><div class=\"vc-field vc-stage-field\" data-stage=\"2\"><label class=\"vc-label\" for=\"vc-e2\">Stage 2 efficiency \u03b7<sub>2<\/sub> <span class=\"vc-label-hint\">(&gt;0\u2026100%)<\/span><\/label><input class=\"vc-input vc-eff\" id=\"vc-e2\" type=\"text\" inputmode=\"decimal\"><\/div><div class=\"vc-field vc-stage-field\" data-stage=\"3\"><label class=\"vc-label\" for=\"vc-e3\">Stage 3 efficiency \u03b7<sub>3<\/sub> <span class=\"vc-label-hint\">(&gt;0\u2026100%)<\/span><\/label><input class=\"vc-input vc-eff\" id=\"vc-e3\" type=\"text\" inputmode=\"decimal\"><\/div><div class=\"vc-field vc-stage-field\" data-stage=\"4\"><label class=\"vc-label\" for=\"vc-e4\">Stage 4 efficiency \u03b7<sub>4<\/sub> <span class=\"vc-label-hint\">(&gt;0\u2026100%)<\/span><\/label><input class=\"vc-input vc-eff\" id=\"vc-e4\" type=\"text\" inputmode=\"decimal\"><\/div><div class=\"vc-field vc-stage-field\" data-stage=\"5\"><label class=\"vc-label\" for=\"vc-e5\">Stage 5 efficiency \u03b7<sub>5<\/sub> <span class=\"vc-label-hint\">(&gt;0\u2026100%)<\/span><\/label><input class=\"vc-input vc-eff\" id=\"vc-e5\" type=\"text\" inputmode=\"decimal\"><\/div><\/div><div style=\"padding:0 24px 24px\"><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-source\">Efficiency source and common load, speed, temperature\/condition basis<\/label><input class=\"vc-input\" id=\"vc-source\" type=\"text\" maxlength=\"300\"><\/div><p id=\"vc-error\" role=\"alert\" style=\"margin:.75rem 0 0;color:#b42318\"><\/p><div class=\"vc-warning-box\"><p style=\"margin:0\"><strong>Boundary gate:<\/strong> every \u03b7<sub>i<\/sub> must describe power leaving stage i divided by power entering that same stage at the stated operating point. Do not mix nameplate full-load values, part-load estimates and measurements from different conditions.<\/p><\/div><\/div><\/form><div class=\"vc-results\" id=\"vc-results\"><div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Cascade result<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\">Copy<\/button><\/div><div class=\"vc-result-grid\"><div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Total efficiency \u03b7<\/div><div class=\"vc-rcard-value\" id=\"vc-r-eff\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Loss fraction<\/div><div class=\"vc-rcard-value\" id=\"vc-r-loss-pct\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Input power<\/div><div class=\"vc-rcard-value\" id=\"vc-r-pin\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Output power<\/div><div class=\"vc-rcard-value\" id=\"vc-r-pout\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Total power loss<\/div><div class=\"vc-rcard-value\" id=\"vc-r-loss\">\u2014<\/div><\/div><\/div><p id=\"vc-r-note\" style=\"margin:0;color:var(--vc-ink-secondary)\"><\/p><\/div><\/div>\r\n<div class=\"vc-section vc-open\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Power boundary and data scope<\/span><\/span><\/button><div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\"><div class=\"vc-formula-box\">\u03b7<sub>total<\/sub>=\u220f\u03b7<sub>i<\/sub>; &nbsp; P<sub>out<\/sub>=P<sub>in<\/sub>\u03b7<sub>total<\/sub>; &nbsp; P<sub>in<\/sub>=P<sub>out<\/sub>\/\u03b7<sub>total<\/sub><\/div><div class=\"vc-formula-box\">P<sub>loss<\/sub>=P<sub>in<\/sub>\u2212P<sub>out<\/sub>; &nbsp; loss fraction=1\u2212\u03b7<sub>total<\/sub><\/div><p>The identities follow directly from \u03b7=P<sub>out<\/sub>\/P<sub>in<\/sub> for each consecutive stage with no unmodelled branch between boundaries.<\/p><p>The US Department of Energy\u2019s <a href=\"https:\/\/www.energy.gov\/sites\/prod\/files\/2014\/04\/f15\/amo_motors_guidebook_web.pdf\" target=\"_blank\" rel=\"noopener\">Motor-Driven Systems guidebook<\/a> shows that motor efficiency varies with load. Its <a href=\"https:\/\/www1.eere.energy.gov\/manufacturing\/tech_assistance\/pdfs\/motor.pdf\" target=\"_blank\" rel=\"noopener\">motor and drive sourcebook<\/a> advises using manufacturer drive efficiency as a function of operating speed or load. Therefore this calculator requires actual same-condition inputs instead of component-type defaults.<\/p><div class=\"vc-warning-box\"><p style=\"margin:0\"><strong>Removed claims:<\/strong> the former tool prefilled motor, gear, belt, chain, worm and coupling efficiencies and a typical-value table without traceable operating points. It also silently ignored blank, zero or &gt;100% stages while still showing a total. All active stages are now mandatory and validated.<\/p><\/div><\/div><\/div><\/div><footer class=\"vc-footer\"><p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a><\/p><p>Cascade power-balance arithmetic; verify ratings at the actual duty point. Scientific review: July 2026.<\/p><\/footer><\/div>\r\n<script>(function(){'use strict';function $(i){return document.getElementById(i)}function raw(v){var s=String(v).trim().replace(\/\\s+\/g,'');if(!\/^[+]?(?:\\d+(?:[.,]\\d*)?|[.,]\\d+)$\/.test(s))return NaN;return Number(s.replace(',','.'))}function pos(v){var x=raw(v);return Number.isFinite(x)&&x>0?x:NaN}function fmt(x){var y=Math.round(x*1e9)\/1e9;if(Math.abs(x-y)<=2e-12*Math.max(1,Math.abs(x)))x=y;return Number(x.toPrecision(12)).toString()}function clearResult(){['vc-r-eff','vc-r-loss-pct','vc-r-pin','vc-r-pout','vc-r-loss'].forEach(function(id){$(id).textContent='\u2014'});$('vc-r-note').textContent='';$('vc-results').classList.remove('vc-visible')}function toggle(){var mode=$('vc-mode').value,count=Number($('vc-count').value);$('vc-power-row').style.display=mode==='efficiency'?'none':'flex';$('vc-power-label').innerHTML=mode==='reverse'?'Required output power <span class=\"vc-label-hint\">(kW; &gt;0)<\/span>':'Input power <span class=\"vc-label-hint\">(kW; 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