{"id":138,"date":"2026-07-08T08:33:30","date_gmt":"2026-07-08T08:33:30","guid":{"rendered":"https:\/\/industrialelectricmotor.net\/?post_type=product&p=138"},"modified":"2026-07-08T08:33:31","modified_gmt":"2026-07-08T08:33:31","slug":"y2ej-series-8-pole-electromagnetic-brake-motor","status":"publish","type":"product","link":"https:\/\/industrialelectricmotor.net\/fr\/produit\/y2ej-series-8-pole-electromagnetic-brake-motor\/","title":{"rendered":"Y2EJ Series 8-Pole Electromagnetic Brake Motor"},"content":{"rendered":"
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8-Pole 720 rpm<\/div>\n
Integral DC Brake<\/div>\n
Maximum Shaft Torque<\/div>\n
Fail-Safe Spring-Set<\/div>\n
IEC 60034 Compliant<\/div>\n
ISO 9001 Certified<\/div>\n<\/div>\n
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\"Y2EJ
\n\"Y2EJ<\/div>\n
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Maximum Torque Density and Minimum Gearbox Ratio in the Y2EJ Range<\/h2>\n

The Y2EJ 8-pole brake motor is the highest-torque variant in the Y2EJ series. At 720 rpm, shaft torque is double that of a 4-pole motor and 33% higher than a 6-pole motor at the same power rating and frame size. This torque advantage makes it possible to drive heavy loads through single-stage gearboxes in applications where other pole configurations would require two-stage reduction, with corresponding savings in gearbox cost, weight, and maintenance complexity.<\/p>\n

The spring-applied DC electromagnetic brake operates at 720 rpm input speed, which means brake disc kinetic energy per stop is the lowest in the Y2EJ range. Each braking event dissipates approximately 84% less kinetic energy than an equivalent 2-pole motor stop, and 75% less than a 4-pole stop. This dramatically extends brake lining service life in high-cycle applications such as section gates, positioning drives, and start-stop conveyors where brake longevity is a key maintenance cost driver.<\/p>\n

Frame sizes cover 71M through 180L, spanning 0.18 kW to 15 kW. All models carry the same IP54 protection, Class F insulation, and CE marking as the rest of the Y2EJ range, with the same rectifier, brake coil, and friction disc replacement architecture for service consistency across all pole configurations in a mixed installation.<\/p>\n

View the complete brake motor family on the Electromagnetic Brake Motors<\/a> page, or explore high-torque helical solutions at Helical Gear Reducers<\/a>.<\/p>\n<\/div>\n<\/div>\n

Y2EJ 8-Pole Model Specifications<\/h2>\n

All 8-pole models: ~720 rpm, 380 V 50 Hz, IP54, Class F. Brake voltage: DC 205 V (rectified from 380 V AC supply).<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Model<\/th>\nFrame<\/th>\nkW<\/th>\nFull-Load A<\/th>\n\u03b7 %<\/th>\ncos\u03c6<\/th>\nBrake Torque (N\u00b7m)<\/th>\nStop Time (s)<\/th>\nkg<\/th>\n<\/tr>\n<\/thead>\n
Y2EJ71M1-8<\/td>\n71M<\/td>\n0.18<\/td>\n0.88<\/td>\n51.0<\/td>\n0.60<\/td>\n3.5<\/td>\n< 0.40<\/td>\n12.5<\/td>\n<\/tr>\n
Y2EJ71M2-8<\/td>\n71M<\/td>\n0.25<\/td>\n1.18<\/td>\n54.0<\/td>\n0.61<\/td>\n5.0<\/td>\n< 0.40<\/td>\n14.0<\/td>\n<\/tr>\n
Y2EJ80M1-8<\/td>\n80M<\/td>\n0.37<\/td>\n1.66<\/td>\n57.0<\/td>\n0.62<\/td>\n7.0<\/td>\n< 0.40<\/td>\n21.0<\/td>\n<\/tr>\n
Y2EJ80M2-8<\/td>\n80M<\/td>\n0.55<\/td>\n2.34<\/td>\n60.0<\/td>\n0.63<\/td>\n10.0<\/td>\n< 0.40<\/td>\n23.5<\/td>\n<\/tr>\n
Y2EJ90S-8<\/td>\n90S<\/td>\n0.75<\/td>\n3.04<\/td>\n63.0<\/td>\n0.64<\/td>\n14.0<\/td>\n< 0.40<\/td>\n32.0<\/td>\n<\/tr>\n
Y2EJ90L-8<\/td>\n90L<\/td>\n1.1<\/td>\n4.26<\/td>\n66.0<\/td>\n0.65<\/td>\n20.0<\/td>\n< 0.40<\/td>\n39.0<\/td>\n<\/tr>\n
Y2EJ100L1-8<\/td>\n100L<\/td>\n1.5<\/td>\n5.60<\/td>\n69.0<\/td>\n0.66<\/td>\n28.0<\/td>\n< 0.40<\/td>\n54.0<\/td>\n<\/tr>\n
Y2EJ100L2-8<\/td>\n100L<\/td>\n2.2<\/td>\n7.94<\/td>\n71.0<\/td>\n0.67<\/td>\n38.0<\/td>\n< 0.40<\/td>\n62.0<\/td>\n<\/tr>\n
Y2EJ132S-8<\/td>\n132S<\/td>\n3.0<\/td>\n9.60<\/td>\n74.0<\/td>\n0.68<\/td>\n55.0<\/td>\n< 0.40<\/td>\n102.0<\/td>\n<\/tr>\n
Y2EJ132M-8<\/td>\n132M<\/td>\n4.0<\/td>\n12.40<\/td>\n76.0<\/td>\n0.68<\/td>\n70.0<\/td>\n< 0.40<\/td>\n122.0<\/td>\n<\/tr>\n
Y2EJ160M-8<\/td>\n160M<\/td>\n5.5<\/td>\n16.60<\/td>\n78.5<\/td>\n0.69<\/td>\n100.0<\/td>\n< 0.40<\/td>\n184.0<\/td>\n<\/tr>\n
Y2EJ160L-8<\/td>\n160L<\/td>\n7.5<\/td>\n22.20<\/td>\n80.0<\/td>\n0.70<\/td>\n140.0<\/td>\n< 0.40<\/td>\n218.0<\/td>\n<\/tr>\n
Y2EJ180L-8<\/td>\n180L<\/td>\n11<\/td>\n32.00<\/td>\n82.0<\/td>\n0.70<\/td>\n200.0<\/td>\n< 0.40<\/td>\n270.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Motor and Brake Conditions<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
Ambient temperature<\/td>\n\u221215 \u00b0C to +40 \u00b0C<\/td>\n<\/tr>\n
Motor supply<\/td>\n380 V 50 Hz 3-phase<\/td>\n<\/tr>\n
Brake supply<\/td>\nDC 205 V (from rectifier)<\/td>\n<\/tr>\n
Brake action<\/td>\nSpring-applied \/ EM-released<\/td>\n<\/tr>\n
Brake engage time<\/td>\n< 0.4 s<\/td>\n<\/tr>\n
Protection<\/td>\nIP54 (motor and brake)<\/td>\n<\/tr>\n
Insulation class<\/td>\nClass F<\/td>\n<\/tr>\n
Mounting<\/td>\nIMB3 \/ IMB5 \/ IMB35<\/td>\n<\/tr>\n
Manual brake release<\/td>\nLever (optional)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Standards and Certifications<\/h3>\n\n\n\n\n\n\n\n\n\n\n
Motor design<\/td>\nIEC 60034<\/td>\n<\/tr>\n
Brake standard<\/td>\nIEC 60947-4<\/td>\n<\/tr>\n
Frame dimensions<\/td>\nIEC 72-1<\/td>\n<\/tr>\n
Protection rating<\/td>\nIEC 60529<\/td>\n<\/tr>\n
Quality management<\/td>\nISO 9001<\/td>\n<\/tr>\n
Marking<\/td>\nCE<\/td>\n<\/tr>\n
Poles<\/td>\n8-pole<\/td>\n<\/tr>\n
Duty cycle<\/td>\nS1 \/ S3 (cyclic)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

Typical Applications for Y2EJ 8-Pole Brake Motors<\/h2>\n\n\n\n
\"Y2EJ<\/p>\n
\n
Apron Feeder Conveyors<\/div>\n
Heavy apron feeders under rock crushers and primary hopper gates use the 8-pole brake motor for its maximum starting torque under full static load, combined with the fail-safe brake that holds the loaded apron stationary when the motor is de-energised between feed cycles.<\/div>\n<\/div>\n<\/td>\n
\"Y2EJ<\/p>\n
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Heavy Viscous Agitators<\/div>\n
Large polymer, adhesive, and slurry agitators starting under full viscous load use the 8-pole motor for its maximum torque-to-current ratio at start, minimising the supply current spike while delivering the breakaway torque needed to overcome the static viscous resistance of cold or settled material.<\/div>\n<\/div>\n<\/td>\n
\"Y2EJ<\/p>\n
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Sluice and Weir Gates<\/div>\n
Water control gate drives on irrigation canals, reservoirs, and treatment works use the 8-pole brake motor for its low operating speed and the absolute load-holding requirement: the fail-safe brake must hold the gate position against full hydrostatic head pressure without electrical power.<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n
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\ud83d\udd25<\/div>\n
Rotary Kiln Barring<\/div>\n
Auxiliary slow-turning drives for cement and mineral processing kilns use the 8-pole brake motor to rotate the shell at 1 to 3 rpm through a high-ratio gearbox during warm-up and cool-down phases, preventing thermal distortion. The brake holds the kiln at any position when turning is paused.<\/div>\n<\/div>\n<\/td>\n
\n
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\u2693<\/div>\n
Mooring Winches<\/div>\n
Auxiliary mooring winches and capstan drives on small vessels use the 8-pole brake motor because its low speed and high torque allow single-stage gearbox reduction to the winch drum speed, and the integral brake provides the mandatory load-holding for mooring lines under vessel motion loads.<\/div>\n<\/div>\n<\/td>\n
\n
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\ud83c\udfc3<\/div>\n
Sports Facility Barriers<\/div>\n
Retractable advertising boards, pitch-side barriers, and motorised goal frames in sports facilities use 8-pole brake motors for slow controlled movement and positive position holding at end stops, both important for spectator safety during high-traffic events.<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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The 8-Pole Brake Motor Compared Across the Y2EJ Pole Range<\/h2>\n
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Shaft Torque at Equal Power<\/h3>\n

At 4 kW rated power: 2-pole motor at 2880 rpm gives 13.3 N\u00b7m; 4-pole at 1440 rpm gives 26.5 N\u00b7m; 6-pole at 960 rpm gives 39.8 N\u00b7m; 8-pole at 720 rpm gives 53.1 N\u00b7m. The 8-pole motor produces four times the shaft torque of a 2-pole motor at the same power rating, allowing a gearbox ratio one-quarter as large for the same output shaft torque \u2014 the difference between a single-stage 10:1 worm gearbox and a two-stage 40:1 assembly.<\/p>\n<\/div>\n

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Brake Disc Lining Life<\/h3>\n

Lining wear per stop is proportional to kinetic energy dissipated. A rotor spinning at 720 rpm stores (720\/2880)\u00b2 = 6.25% of the kinetic energy of the same-inertia rotor spinning at 2880 rpm. This means that at the same stopping frequency, the 8-pole brake disc lining lasts approximately 16 times longer than the 2-pole lining, and approximately 4 times longer than the 4-pole lining. For a packaging machine making 60 stops per hour, 8 hours per day, this translates from monthly lining replacement (2-pole) to annual or less (8-pole) for the same brake disc size.<\/p>\n<\/div>\n

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Power Factor and Starting Current<\/h3>\n

The 8-pole motor has the lowest power factor (0.60 to 0.70) and lowest starting current multiplier (Ist\/In approximately 4.5 to 5.5) in the Y2EJ range. The low Ist\/In is a practical advantage in installations with limited supply capacity: a 4 kW 8-pole motor draws approximately 55 A on start compared to approximately 80 A for a 4-pole motor of the same power, allowing a smaller upstream fuse and supply cable. Power factor correction capacitors are recommended for sites where reactive power tariff penalties apply.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n
\n
\"Korea<\/p>\n
Rotor Production Line<\/div>\n<\/div>\n
\"Korea<\/p>\n
Finished Goods Warehouse<\/div>\n<\/div>\n
\"Korea<\/p>\n
Export Packaging<\/div>\n<\/div>\n
\"Korea<\/p>\n
CE and ISO Certifications<\/div>\n<\/div>\n<\/div>\n<\/div>\n

Frequently Asked Questions \u2014 Y2EJ Series 8-Pole Brake Motor<\/h2>\n
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Why does the 8-pole motor have a lower efficiency than the 4-pole at the same frame size?<\/div>\n
An 8-pole stator requires more magnetic pole pairs packed into the same stator bore, which increases the total stator iron loss and requires a more complex winding pattern with shorter coil pitches. Shorter coil pitches increase the proportion of non-productive end-winding copper relative to the active slot copper, raising copper loss per unit of output power. The combined effect is a reduction in full-load efficiency of 3 to 8 percentage points compared to a 4-pole motor of the same frame and power rating, which is the standard trade-off accepted when the torque or gearbox advantages of the 8-pole configuration are needed.<\/div>\n<\/div>\n
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Is the 8-pole brake motor suitable for high-cycle start-stop duty?<\/div>\n
Yes, the 8-pole variant is the best choice for high-cycle start-stop duty of all Y2EJ pole configurations, specifically because of the low kinetic energy per stop at 720 rpm. Brake disc lining life is maximised, and motor winding thermal stress per start is also lower because the motor takes less time and draws less energy to accelerate to its lower synchronous speed. The standard maximum duty is 60 starts per hour for frame sizes up to 132M; for higher cycle rates, contact Korea Ever-Power for a thermal assessment of the specific frame and duty point.<\/div>\n<\/div>\n
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What is the cooling arrangement at 720 rpm compared to a 4-pole model?<\/div>\n
The 8-pole motor uses the same shaft-mounted cooling fan as the 4-pole variant, but at 720 rpm the fan delivers approximately 25% of the airflow produced at 1440 rpm. Korea Ever-Power compensates with Class F insulation and Class B temperature-rise limits, providing a 25 K thermal buffer. For continuous full-load operation in ambient temperatures above 35 \u00b0C, or for high-altitude installations above 1000 m, derating of the motor output power by 5 to 10% is recommended. Contact Korea Ever-Power for derating curves applicable to your specific installation conditions.<\/div>\n<\/div>\n
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Can the brake be used to control descent speed on a hoist?<\/div>\n
No. The disc brake in the Y2EJ is a holding and stopping brake, not a dynamic speed-control brake. It is not designed for continuous sliding friction (speed modulation duty). Attempting to use partial brake engagement to regulate descent speed would cause rapid overheating of the friction disc lining and premature failure. For controlled descent speed regulation, a dedicated disc brake or drum brake with forced cooling, or a regenerative VFD arrangement, is the correct solution. The Y2EJ brake is designed for full-engagement positive stops and full holding duty only.<\/div>\n<\/div>\n
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What is the noise level of the 8-pole motor compared to 4-pole at the same frame?<\/div>\n
Fan aerodynamic noise varies with approximately the fifth power of speed. At 720 rpm versus 1440 rpm, the 8-pole motor fan produces (720\/1440)\u2075 = 3.1% of the fan noise power of the 4-pole motor \u2014 a reduction of approximately 15 dB. For the same frame size, the 8-pole motor is substantially quieter than the 4-pole in terms of airborne fan noise, though electromagnetic noise from the stator harmonics of an 8-pole winding is slightly higher in relative terms. Overall, the 8-pole motor is the quietest pole configuration in the Y2EJ range, making it well suited to residential proximity installations such as car parks and building services plant rooms.<\/div>\n<\/div>\n
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Which helical gearbox sizes pair with the 8-pole brake motor range?<\/div>\n
Korea Ever-Power helical gear reducers in the R, F, K, and S series are available with IEC B5 flange input adaptors matched to the Y2EJ 8-pole brake motor frame sizes. Frame 71 and 80 brake motors suit F37 and F47 helical units; frame 90 and 100 suit F57 and F67; frame 132 suits F77 and F87; frame 160 and 180 suit F97 and F107. Helical gearboxes provide higher efficiency than worm gearboxes at ratios below 10:1, making them preferred for 8-pole brake motor applications where the required output speed is in the 70 to 150 rpm range. See the Helical Gear Reducers<\/a> page for matched gearbox options.<\/div>\n<\/div>\n<\/div>\n
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Request a Quote for Y2EJ 8-Pole Brake Motors<\/h2>\n

Specify power (kW), required brake torque, duty cycle, mounting type, and gearbox pairing. Learn about our manufacturing on the About Us<\/a> page.<\/p>\n

Contact Korea Ever-Power<\/a><\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

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Eight-pole squirrel-cage induction motor with integral DC electromagnetic disc brake, running at approximately 720 rpm with fail-safe positive stopping on power interruption. The slowest and highest-torque pole configuration in the Y2EJ range \u2014 designed for very slow load speeds, heavy starting duties, and applications where minimising the required gearbox reduction ratio is a primary design objective.<\/p>\n

Speed: ~720 rpm (8P)<\/span>
\nPower: 0.18 \u2013 15 kW<\/span>
\nFrames: 71M \u2013 180L<\/span>
\nBrake: DC Spring-Applied<\/span>
\nProtection: IP54<\/span>
\nInsulation: Class F<\/span><\/div>\n<\/div>","protected":false},"featured_media":22,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[18],"product_tag":[],"class_list":["post-138","product","type-product","status-publish","has-post-thumbnail","product_cat-brake-motors","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/product\/138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/media?parent=138"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/product_brand?post=138"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/product_cat?post=138"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/industrialelectricmotor.net\/fr\/wp-json\/wp\/v2\/product_tag?post=138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}