YRQ500L5-8 480kw 740rpm 3 Phase Industrial Motor

Brief Introduction

Manufactured by XI'AN SIMO MOTOR CO.,LTD, the YRQ series wound rotor three-phase asynchronous motor is a premium heavy-duty drive solution developed strictly in accordance with GB/T755 national standards and CE certification specifications, tailor-made for harsh heavy-load industrial working conditions requiring soft startup and speed adjustment. As a mature 3 phase industrial motor, it is a core flagship product of SIMO's high-voltage & large-power motor portfolio, inheriting decades of the brand's R&D and manufacturing experience in large-size asynchronous motors, with the YRQ500L5-8 (480kW) as its classic representative model shown on the nameplate.

Structurally, the YRQ series adopts mature wound rotor design differing from conventional squirrel-cage motors. Its stator and rotor windings both apply Class 155 high-temperature resistant insulation material, enabling stable continuous operation within -15℃ to 40℃ ambient temperature and below 1000m altitude, perfectly adapting to high-dust, temperature-fluctuating workshop environments in mining, metallurgy and cement industries. The sample YRQ500L5-8 motor is configured with 380V stator rated voltage and 792V rotor voltage; the stator adopts delta connection while the rotor uses star connection, with rated working frequency of 50Hz and synchronous rotating speed at 740r/min. Equipped with front-end bearing 23226 and non-drive-end NU322ECM bearings imported from top-tier bearing suppliers, the motor greatly reduces friction loss and extends long-term running service life. This robustly structured 3 phase industrial motor delivers outstanding mechanical stability to cope with frequent load fluctuations in rigorous production scenarios.

In terms of performance optimization, the whole YRQ series reaches up to 94% energy efficiency and a power factor of 0.86 under rated working condition, standing among top-tier energy-saving standards for wound rotor large motors. Its most prominent advantage lies in flexible startup performance: by connecting external resistance to rotor circuits, users can effectively lower startup current while boosting startup torque, avoiding instantaneous current surge impacting power grid that frequently troubles ordinary squirrel cage motors during heavy-load startup. Rated for S1 continuous duty cycle and IP20 protection grade with IC01 cooling structure plus B3 foot-mounted installation, the motor supports non-stop long-hour operation under full load and allows diversified installation matching different equipment foundations. Weighing 2910kg for the 480kW specification, the robust cast iron frame features excellent mechanical rigidity to resist vibration during frequent startup and variable-load operation.

Application-wise, YRQ series motors are extensively configured as driving power for ball mills, rotary kilns, large compressors, mine hoists and belt conveyors across cement, mineral processing, metallurgy, coal and chemical sectors. As a widely recognized 3 phase industrial motor in heavy industry fields, it gains consistent market praise for stable long-term running performance. For production quality control, every finished motor undergoes strict factory tests including no-load trial run, insulation resistance inspection and load performance calibration before delivery; each unit is marked with exclusive production serial number for full lifecycle traceability. Backed by SIMO's professional after-sales service hotline, global customers can access timely technical guidance and maintenance support.

From design, raw material selection to finished production, all procedures follow standardized production management, making SIMO YRQ wound rotor motors a cost-effective and reliable preferred drive option for global heavy industrial equipment upgrading.

Main Technical Parameters

Production Details

Frame

• Compact and robust iron casting frame

• Universal IEC installation dimensions available

• Customizable outlook and dimensions

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Stator

• 99.9% pure copper winding for stator to ensure the output power and efficiency

• Excellent insulation system with 5 more processing flows

• All the windings are fitted in by handwork to ensure all slots are full and avoid any winding flaw.

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Rotor

• Aluminum casting rotor with high quality silicon steel rotor core to assure induction efficiency

• Well and precisely machined shafts with good capacity of strength and toughness

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Testing

• All motors must pass the piece testing before painting and packaging

• Type tests will be regularly performed for each series, more often for new developed series and variants.

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Applications

Cement

Power station

Steel

Sugar

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