YJTKK400-4G 3 Phase Speed Control Of Wound Rotor Induction Motor 500 kW

Brief Introduction

Manufactured by Xi'an SIMO Motor, the YJTKK series variable-frequency adjustable-speed motor stands as a premium heavy-duty drive engineered for versatile industrial variable-torque applications, delivering precise and stable speed control of wound rotor induction motor for mining, metallurgy, water supply and chemical processing facilities. Taking YJTKK400-4G as a flagship specimen, this unit boasts a rated power of 500kW with 10kV stator voltage, attaining an energy efficiency of 93.1% to drastically cut long-term power consumption for industrial operators. It supports a wide frequency regulation scope spanning 5Hz to 70Hz while sustaining full 500kW power output across the entire band, paired with a base rotational speed of 1485 r/min and a power factor of 0.87 for optimized power grid compatibility. Adopting Class 155 heat-resistant insulation material, the motor endures ambient temperatures ranging from -15℃ to 40℃ and can operate reliably at altitudes as high as 2300 meters. Its IP55 high ingress protection grade and IC666 integrated cooling architecture block dust, moisture and airborne debris, perfectly fitting harsh outdoor and workshop environments. Equipped with NU224ECM driving-end bearings and 6224/C3 non-driving-end bearings, alongside B3 horizontal mounting form, the unit accommodates long-duration S1 continuous duty with outstanding mechanical stability, and its total weight of 3670 kilograms reflects a rigid, shock-resistant cast iron frame built for decades of heavy-load operation.

Distinguished from conventional fixed-speed motors, this series is tailor-made for variable-frequency drive systems, with every structural detail refined to eliminate the common drawbacks of frequency conversion operation. Specialized stator and rotor winding craftsmanship suppresses harmonic loss and vibration generated during variable-frequency modulation, preventing winding overheating and premature aging under frequent speed adjustments. The factory's official safety guidelines lay out strict operational norms for long-term stable performance: 2-pole variants must rotate following directional indicator marks; water-cooled configurations require pre-operation circulation water injection per nameplate parameters; heavy-load reduced-voltage startup is restricted, as starting torque declines proportionally to the square of startup voltage, which may trigger excessive winding temperature and permanent damage. For models fitted with composite lubricated sliding bearings, adequate external circulating grease supply must be verified before energization, while winding earthing operation is strictly prohibited. When coupled with driven machinery, axial central lines must be fully aligned to avoid persistent vibration and accelerated bearing wear. All products comply with corporate standard Q/XD.510.316 and pass rigorous full-load ageing, insulation resistance and noise testing prior to shipment, guaranteeing consistent performance during continuous variable-speed cycles and solidifying its reliability as a core carrier for speed control of wound rotor induction motor in complex industrial production lines.

Backed by Xi'an SIMO Motor's decades of high-voltage motor R&D prowess, the YJTKK series carries complete CE certification to meet global export standards, serving overseas markets across Southeast Asia, Central Asia and the Middle East. The brand provides full-lifecycle one-stop technical services, including pre-sales customized parameter matching, on-site installation calibration, operational training and rapid aftermarket spare parts supply to resolve all variable-speed drive operational challenges for end users. Whether deployed on large industrial fans, high-flow water pumps, metallurgical rolling equipment or mine conveying machinery that demands flexible torque and speed adjustment, this robust variable-frequency motor maintains steady efficiency and minimizes maintenance downtime throughout its service lifespan. For global heavy-industry enterprises seeking cost-effective, high-stability variable-speed power equipment, the YJTKK series remains an unparalleled choice to realize accurate, energy-saving speed control of wound rotor induction motor and elevate the overall operational efficiency of entire production systems.

Main Technical Parameters

Production Details

Frame

• Box structure frame, easy for maintaining and installation

• Flexible dimensions

• Customizable outlook

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Stator

• 99.9% pure copper winding ensures 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 possible winding flaw.

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Rotor

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

• Copper bar rotor is available for YJTKK motor

• Pprecisely machined shafts with good capacity of  toughness

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Testing

• All motors must pass the testing before painting and packaging

• We regularly test existing and new products to ensure quality.

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Package and delivery

• All motors will be packaged well before delivery

• Plastic cover inside, vacuum tin foil outer and then solid wood box

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Applications

YJTKK Motor is the widely used in many general industries, such as blowers, pumps, crushers, cutting machines, and many other heavy machines. For more application details, contact us.

Cement

Power Station

Water conservation

Steel

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