{"id":266,"date":"2026-07-10T06:05:21","date_gmt":"2026-07-10T06:05:21","guid":{"rendered":"https:\/\/industrialelectricmotor.net\/?p=266"},"modified":"2026-07-10T06:05:21","modified_gmt":"2026-07-10T06:05:21","slug":"three-phase-motor-for-belt-conveyor","status":"publish","type":"post","link":"https:\/\/industrialelectricmotor.net\/fr\/three-phase-motor-for-belt-conveyor\/","title":{"rendered":"Three-Phase Motor for Belt Conveyor"},"content":{"rendered":"
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Korea Ever-Power \u00b7 Y2 Series \u00b7 Conveyor Drive Application Guide<\/span><\/p>\n

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Three-Phase Motor for Belt Conveyor:
\nSelection and Sizing Guide<\/span><\/h1>\n

Selecting the wrong electric motor for a belt conveyor drive is one of the most common causes of premature motor failure and unplanned conveyor downtime. This guide covers the complete conveyor motor selection process \u2014 from belt tension and power calculation through starting torque, pole count, service factor, and duty cycle \u2014 and maps the Korea Ever-Power Y2 series to the full range of industrial belt conveyor applications from warehouse logistics through mining and food processing.<\/p>\n

Power Calculation<\/span>
\nStarting Torque<\/span>
\nService Factor<\/span>
\nDuty Cycle S1\u2013S4<\/span>
\nIP54 \/ IP55<\/span><\/div>\n<\/div>\n<\/div>\n

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P = Fv<\/div>\n
Belt tension \u00d7 belt speed<\/div>\n<\/div>\n
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1.3\u20131.5\u00d7<\/div>\n
Starting torque over rated<\/div>\n<\/div>\n
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1.25 SF<\/div>\n
Service factor for heavy conveyor<\/div>\n<\/div>\n
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4-pole<\/div>\n
Standard for most conveyors<\/div>\n<\/div>\n
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IP54\u201355<\/div>\n
Indoor to outdoor rating<\/div>\n<\/div>\n<\/div>\n

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\"Three-phase<\/p>\n
Belt conveyor drives are the single largest application for three-phase induction motors in industry. Correct motor selection \u2014 matched to the belt tension, starting torque, duty cycle, and environmental conditions of the specific installation \u2014 is critical for reliable long-term operation.<\/div>\n<\/div>\n

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Contents<\/div>\n
1. Conveyor Drive Power Calculation<\/a>
\n2. Starting Torque Requirements<\/a>
\n3. Motor Sizing with Service Factor<\/a>
\n4. Speed Selection: 4-Pole vs 6-Pole<\/a>
\n5. Duty Cycle and Thermal Rating<\/a>
\n6. Y2 Series Conveyor Specifications<\/a>
\n7. Conveyor Applications by Sector<\/a>
\n8. Frequently Asked Questions<\/a><\/div>\n<\/div>\n

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1. Conveyor Drive Power Calculation<\/h2>\n

The required drive motor power for a belt conveyor is calculated from the effective belt tension and the belt speed. The effective tension is the net horizontal force that the drive pulley must apply to the belt to move the load at the required speed \u2014 it accounts for the weight of material on the belt, the belt mass, idler rolling resistance, and any elevation change.<\/p>\n

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Conveyor Motor Power Formula<\/div>\n
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Effective belt tension:<\/div>\n
F (N) = f \u00d7 L \u00d7 g \u00d7 (2\u00d7m\u2011b + m\u2011load) + m\u2011load \u00d7 g \u00d7 H\/L<\/div>\n
f = friction factor; L = length (m); g = 9.81; m = mass per metre (kg\/m); H = lift height (m)<\/div>\n<\/div>\n
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Drive motor power (kW):<\/div>\n
P = F \u00d7 v \u00f7 (1,000 \u00d7 \u03b7\u2011drive)<\/div>\n
v = belt speed (m\/s); \u03b7-drive = drive efficiency (0.92\u20130.96 for gearbox + V-belt)<\/div>\n<\/div>\n
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Worked example:<\/div>\n
L = 40 m, v = 1.2 m\/s, load = 8 kg\/m, belt = 5 kg\/m, H = 3 m, f = 0.022, \u03b7 = 0.94
\nF = 0.022 \u00d7 40 \u00d7 9.81 \u00d7 (10+8) + 8 \u00d7 9.81 \u00d7 3\/40 = 155.6 + 5.9 = 161.5 N
\nP = 161.5 \u00d7 1.2 \u00f7 (1,000 \u00d7 0.94) = 0.21 kW \u2192 select 0.37 kW motor<\/strong><\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Conveyor Type<\/th>\nTypical Friction Factor f<\/th>\nBelt Speed Range<\/th>\nTypical Motor Range<\/th>\n<\/tr>\n<\/thead>\n
Light parcel \/ warehouse<\/td>\n0.020\u20130.025<\/td>\n0.5\u20131.5 m\/s<\/td>\n0.18\u20131.5 kW<\/td>\n<\/tr>\n
Food processing conveyor<\/td>\n0.022\u20130.030<\/td>\n0.1\u20130.5 m\/s<\/td>\n0.37\u20133.0 kW<\/td>\n<\/tr>\n
Aggregate \/ quarry<\/td>\n0.025\u20130.035<\/td>\n1.0\u20132.5 m\/s<\/td>\n3.0\u201330 kW<\/td>\n<\/tr>\n
Mining (coal \/ ore)<\/td>\n0.030\u20130.040<\/td>\n1.5\u20134.0 m\/s<\/td>\n11\u2013200 kW<\/td>\n<\/tr>\n
Inclined (elevation lift)<\/td>\n0.025\u20130.035 + sin\u03b8<\/td>\n0.5\u20132.0 m\/s<\/td>\n2.2\u201375 kW<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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2. Starting Torque Requirements<\/h2>\n

A belt conveyor that starts under load \u2014 with material already on the belt \u2014 imposes a higher torque demand on the motor during the acceleration phase than during steady-state running. The starting torque requirement depends on whether the conveyor starts empty, under partial load, or under full load, and whether the start is direct-on-line (DOL), star-delta, or via a soft-starter.<\/p>\n

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DOL Start \u2014 Empty Belt<\/div>\n

Starting torque requirement 1.0\u20131.2\u00d7 rated running torque. Y2 series DOL starting torque of 2.0\u20132.8\u00d7 rated is more than adequate. No special consideration needed \u2014 standard Y2 motor with standard overload relay is the correct specification.<\/p>\n<\/div>\n

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DOL Start \u2014 Loaded Belt<\/div>\n

Starting torque requirement 1.5\u20132.0\u00d7 rated running torque for a normally loaded belt, up to 2.5\u00d7 for a steep incline with full load. Confirm Y2 motor locked-rotor torque (typically 2.2\u20132.8\u00d7 rated) exceeds the worst-case loaded start requirement with 15% margin.<\/p>\n<\/div>\n

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Soft-Starter or Star-Delta<\/div>\n

Star-delta starting reduces starting current to one-third but also reduces starting torque to one-third \u2014 inadequate for loaded conveyor starts. Soft-starter provides adjustable ramp torque with reduced starting current, suitable for long or heavy belt conveyors. Always verify the soft-starter output torque at ramp start is above the conveyor running torque.<\/p>\n<\/div>\n<\/div>\n

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Starting current note: Y2 series motors have a locked-rotor current (Ist) of 6.0\u20137.5\u00d7 rated current during DOL starting. For long belt conveyors above 15 kW on DOL, verify that the supply cable and upstream fuses can carry this 3\u20138 second inrush without voltage drop below 85% of rated voltage at the motor terminals. Voltage drop below 85% during starting reduces available starting torque by the square of the voltage ratio and may prevent the conveyor from accelerating under load.<\/p>\n<\/div>\n<\/div>\n

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3. Motor Sizing with Service Factor<\/h2>\n

The calculated drive power from Section 1 is the theoretical continuous running power under normal conditions. The motor selected must be rated above this calculated power by a service factor that accounts for overloads, conveyor belt tension variability, belt sag under wet or frozen conditions, starting frequency, and component wear over the motor\u2019s service life.<\/p>\n

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Service Factor 1.0 \u2014 Light Conveyors<\/div>\n

Uniform, well-controlled load; clean indoor environment; infrequent starts; short conveyor (below 30 m). Warehouse parcel conveyors, food tray conveyors, light assembly line belt conveyors. Motor rated at 1.0\u00d7 calculated power is acceptable. Select next standard kW above calculated.<\/p>\n<\/div>\n

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Service Factor 1.15 \u2014 General Industrial<\/div>\n

Moderate load variation; occasional overloading; outdoor or dusty environment; 5\u201320 starts per hour. General industrial conveyors: aggregate handling, packaging line infeed, recycling plant belt. Motor selected at 1.15\u00d7 calculated power, then rounded up to next standard kW.<\/p>\n<\/div>\n

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Service Factor 1.25 \u2014 Heavy Duty<\/div>\n

High load variation; frequent starting; heavy or abrasive material; inclined conveyor. Mining conveyors, aggregate with lump material, coal handling, inclined belt above 15 degrees. Motor selected at 1.25\u00d7 calculated power, rounded up to next standard kW in the Y2 series.<\/p>\n<\/div>\n<\/div>\n

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Sizing Example: Aggregate Conveyor<\/div>\n
Calculated power = 3.8 kW. Service factor = 1.25 (heavy duty aggregate). Required motor = 3.8 \u00d7 1.25 = 4.75 kW. Next standard Y2 size = 5.5 kW, 4-pole, IE3, IP55<\/strong>. Selected: Y2-132S-4, 5.5 kW, 1,440 rpm, 380 V, 11.8 A, IE3, IP55.<\/div>\n<\/div>\n<\/div>\n

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4. Speed Selection: 4-Pole vs 6-Pole for Conveyor<\/h2>\n

The pole count of the motor determines its synchronous speed (at 50 Hz: 2-pole = 3,000 rpm, 4-pole = 1,500 rpm, 6-pole = 1,000 rpm, 8-pole = 750 rpm) and therefore the gearbox ratio required to reach the target belt speed. The choice between 4-pole and 6-pole directly affects the gearbox size, cost, and the system efficiency.<\/p>\n

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4-Pole Motor (1,440\u20131,460 rpm) \u2014 Standard Choice<\/div>\n

The 4-pole (1,450 rpm) Y2 motor is the standard conveyor drive motor for belt speeds of 0.5 to 2.5 m\/s when paired with a gearbox or NMRV worm reducer. At belt speed 1.0 m\/s with a 100 mm drive pulley radius, the required output speed is 1.0 \u00f7 (2\u00d7\u03c0\u00d70.1) = 1.59 rev\/s = 95.5 rpm \u2014 a 1,450 \u00f7 95.5 = 15.2:1 gear ratio, well within the NMRV single-stage range.<\/p>\n

Best for: most industrial conveyors, 0.5\u20132.5 m\/s, pairing with NMRV or helical reducer<\/div>\n<\/div>\n
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6-Pole Motor (950\u2013960 rpm) \u2014 Slow Conveyor Option<\/div>\n

Where the required belt speed is below 0.5 m\/s and a single-stage gearbox would need a ratio above 80:1, specifying a 6-pole motor (960 rpm) reduces the required gear ratio by one-third, allowing a smaller gearbox. Food processing inspection belts, dough handling lines, and slow assembly conveyors typically specify 6-pole motors to avoid dual-stage gearboxes.<\/p>\n

Best for: slow conveyors below 0.4 m\/s, food inspection, assembly line, dough handling<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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5. Duty Cycle and Thermal Rating<\/h2>\n
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S1 Continuous Duty<\/div>\n

The motor runs continuously at constant load long enough to reach thermal equilibrium. Most production conveyors, mining conveyors, and warehouse logistics belts running single or multi-shift operation are S1 duty. S1 is the standard duty class for Y2 series motors. The nameplate power rating is the maximum continuous output at full rated voltage and 40\u00b0C ambient.<\/p>\n<\/div>\n

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S3 Intermittent Periodic Duty<\/div>\n

The motor runs for defined periods (cycle on time) then rests (cycle off time) repeatedly. Conveyors that index product (run\u2013stop\u2013run) rather than running continuously fall into S3 duty. The duty factor (on time as a percentage of total cycle time) determines whether a smaller motor can be used \u2014 at 40% duty factor, a motor can be used at approximately 115% of its S1 continuous power rating.<\/p>\n<\/div>\n

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High Ambient Temperature Derating<\/div>\n

Y2 series motors are rated at 40\u00b0C maximum ambient. Conveyors installed in foundries, near furnaces, or in hot climates above 40\u00b0C must derate the motor output by approximately 1% per degree above 40\u00b0C. A 5.5 kW Y2 motor in a 55\u00b0C ambient derate to 5.5 \u00d7 (1\u20130.15) = 4.68 kW effective capacity and must be sized accordingly.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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6. Korea Ever-Power Y2 Series for Conveyor Drives<\/h2>\n
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The Korea Ever-Power Y2 series three-phase induction motor is the standard specification for belt conveyor drives across the 0.18 to 200 kW power range. All Y2 motors meet IE3 premium efficiency as standard, reducing energy cost on continuously running conveyor drives. The full range is available in the three-phase motor product section<\/a>.<\/p>\n

For conveyor drives requiring a combined motor and gearbox unit, Korea Ever-Power supplies Y2 motors matched and assembled with NMRV worm gear reducers or R\/F\/K series helical reducers as complete gearmotor assemblies, available in the gearmotor combination section<\/a>.<\/p>\n<\/div>\n

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Y2 Series \u2014 Conveyor Drive Key Data<\/div>\n\n\n\n\n\n\n\n\n\n\n
Power range<\/td>\n0.18\u2013200 kW<\/td>\n<\/tr>\n
Poles<\/td>\n2P \/ 4P \/ 6P \/ 8P<\/td>\n<\/tr>\n
Efficiency<\/td>\nIE3 standard<\/td>\n<\/tr>\n
Protection<\/td>\nIP54 standard; IP55 option<\/td>\n<\/tr>\n
Insulation<\/td>\nClass F, Class B rise<\/td>\n<\/tr>\n
Voltage<\/td>\n380 V 50 Hz standard<\/td>\n<\/tr>\n
Frame<\/td>\nIEC 71\u2013315<\/td>\n<\/tr>\n
Starting torque<\/td>\n2.0\u20132.8\u00d7 rated<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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7. Conveyor Applications by Sector<\/h2>\n\n\n\n
\"Three-phase<\/p>\n
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Mining and Aggregate Conveyor<\/div>\n

Coal handling, ore transfer, and aggregate screening conveyors use Y2 series 4-pole motors in the 7.5 to 75 kW range, typically with IP55 protection for outdoor installation. Starting method is soft-starter for long belts above 30 m and DOL for short in-plant conveyors. Service factor 1.25 is standard for abrasive material conveying. Motor mounted with separate helical or bevel-helical gearbox for the high torque ratios required at 1.0 to 3.0 m\/s belt speeds with 200 to 800 mm drive pulleys.<\/p>\n<\/div>\n<\/td>\n

\"Three-phase<\/p>\n
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Food Processing and Packaging Conveyor<\/div>\n

Food conveyor drives use Y2 series 4-pole and 6-pole motors in the 0.37 to 5.5 kW range at slow belt speeds of 0.05 to 0.5 m\/s. NMRV worm gearmotor combinations provide the required low output speeds in a compact right-angle package. Where washdown is required, the BXG stainless steel motor replaces the standard Y2 for motors in wet zones. IP54 Y2 motors are suitable for dry food handling areas. All food conveyor motors should be IE3 to minimise the energy cost of continuous operation over 20-year plant life.<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Warehouse and Logistics<\/div>\n

Parcel and tote conveyors in distribution centres use 0.18 to 1.5 kW Y2 motors paired with NMRV 040\u2013063 gearmotors. Accumulation zones use Y2EJ brake motors for precise zone stopping without stopping adjacent zones. IE3 efficiency is critical at scale \u2014 500 conveyor motors at 0.37 kW for 6,000 h\/yr, IE3 vs IE2, saves approximately 4,500 kWh\/yr.<\/p>\n<\/div>\n

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Inclined Conveyor<\/div>\n

Inclined belts at angles above 10 degrees require anti-rollback to prevent load sliding back when the motor stops. NMRV worm gearmotor at 40:1 or above provides passive self-locking. For steeper inclines or safety-critical applications, Y2EJ brake motor with spring-applied brake is the correct specification.<\/p>\n<\/div>\n

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Chemical and Powder Handling<\/div>\n

Conveyors in chemical plants and powder handling areas where explosive dust or vapour atmospheres exist require YB2 explosion-proof motors in place of standard Y2. Gas group and temperature class must be matched to the specific materials present. IP55 standard on YB2 covers outdoor chemical plant installation.<\/p>\n<\/div>\n

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Airport Baggage Handling<\/div>\n

Airport baggage conveyors and check-in belts use Y2 4-pole 0.75 to 3.0 kW motors at belt speeds of 0.5 to 1.0 m\/s with NMRV or drum motor drive. High daily start-stop frequency may qualify as S4 duty \u2014 confirm the motor thermal rating covers the actual duty cycle before specifying.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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\"Korea<\/p>\n

Rotor Production<\/div>\n<\/div>\n
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\"Korea<\/p>\n

Load Testing<\/div>\n<\/div>\n
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\"Korea<\/p>\n

CE and ISO Certified<\/div>\n<\/div>\n
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\"Korea<\/p>\n

Global Delivery<\/div>\n<\/div>\n<\/div>\n

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8. Frequently Asked Questions<\/h2>\n
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How do I calculate the required motor power if I only know the conveyor capacity in tonnes per hour?<\/div>\n<\/div>\n
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Convert tonnes per hour to kg\/m using the belt speed: load per metre (kg\/m) = (capacity in t\/h \u00d7 1,000) \u00f7 (3,600 \u00d7 belt speed in m\/s). For example, 50 t\/h at 1.5 m\/s = 50,000 \u00f7 (3,600 \u00d7 1.5) = 9.26 kg\/m. Then apply the tension and power formula from Section 1. Add the belt mass per metre (typically 3 to 10 kg\/m depending on belt width and ply), the idler friction contribution, and any elevation component to get total effective tension, then divide by drive efficiency to get motor shaft power.<\/p>\n<\/div>\n<\/div>\n

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Can I use a VFD-controlled motor instead of a fixed-speed motor for a belt conveyor?<\/div>\n<\/div>\n
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Yes, and it is often beneficial for conveyors that run at variable throughput. A VFD-controlled conveyor can slow down when throughput is low (saving energy and reducing belt wear) and accelerate smoothly under load without the starting current surge of DOL starting. If fitting a VFD to a Y2 standard motor, ensure the motor is rated for inverter duty or add a dV\/dt output filter on the VFD \u2014 the PWM waveform from a standard VFD without filtering can degrade standard winding insulation within 2 to 5 years. Korea Ever-Power YVF2 series inverter-duty motors are the correct specification for VFD-controlled conveyor drives above 0.75 kW.<\/p>\n<\/div>\n<\/div>\n

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What IP rating should I specify for a conveyor motor in a food processing facility?<\/div>\n<\/div>\n
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It depends on the specific zone the conveyor is installed in. For dry food handling areas (bakery flour belt, dry ingredient conveyor, packaging infeed) away from water or cleaning spray, IP54 with a standard Y2 motor is adequate. For areas subject to light hose-down cleaning, IP65 with an epoxy-coated aluminium frame motor is the minimum. For conveyors in direct food contact or splash zones that receive high-pressure CIP washdown \u2014 meat processing, fish, dairy, fresh produce \u2014 the Korea Ever-Power BXG series in IP69K stainless steel is the correct and required specification. Do not use a painted standard motor in a food washdown zone; paint flaking creates a direct food contamination risk.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Korea Ever-Power \u00b7 Y2 Series \u00b7 Belt Conveyor Drives<\/div>\n

Need a Motor for Your Belt Conveyor Application?<\/h2>\n

Korea Ever-Power Y2 series: 0.18 to 200 kW, IE3 standard, IP54\/55, IEC frames 71\u2013315. Available as bare motors or as matched gearmotor assemblies with NMRV worm or helical reducers.<\/p>\n

View Y2 Motor Range<\/a><\/p>\n<\/div>\n<\/div>\n

Edited by Cxm<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Korea Ever-Power \u00b7 Y2 Series \u00b7 Conveyor Drive Application Guide Three-Phase Motor for Belt Conveyor: Selection and Sizing Guide Selecting the wrong electric motor for a belt conveyor drive is one of the most common causes of premature motor failure and unplanned conveyor downtime. This guide covers the complete conveyor motor selection process \u2014 from […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[28],"tags":[],"class_list":["post-266","post","type-post","status-publish","format-standard","hentry","category-industrial-electric-motor"],"_links":{"self":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/posts\/266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/comments?post=266"}],"version-history":[{"count":1,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/posts\/266\/revisions"}],"predecessor-version":[{"id":268,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/posts\/266\/revisions\/268"}],"wp:attachment":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/media?parent=266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/categories?post=266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/tags?post=266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}