slip ring wound rotor motor

Slip Ring Wound Rotor Motor: Heavy-Duty Power Solutions for Industrial Applications

The slip ring wound rotor motor addresses these critical power transmission needs through its unique rotor design featuring external resistance control. This advanced motor configuration enables controlled starting currents, elevated starting torque, and flexible speed regulation—capabilities essential for mining hoists, metallurgical rolling mills, and cement production equipment operating under demanding conditions.

Slip Ring Wound Rotor Motor Manufacturer and Supplier

Shaanxi Qihe Xicheng Electromechanical Equipment Co., Ltd. delivers comprehensive power equipment solutions backed by over 20 years of industry experience. We have strategic collaborations with more than 30 famous motor manufacturers, including ABB, Siemens, Wolong and XEMC. Our YR series high-voltage wound rotor motors are in accordance with JB/T10314.1-2002 and JB/T7594 specifications, voltage from 3000V to 11000V, power from 200-5600 kW. Every item is subjected to rigorous quality control and is sent with international certifications to provide dependable performance in your important applications.

Pain Points and Solutions

The Problem: Conventional squirrel cage motors have high starting currents (6-8x rated current) creating voltage dips that interrupt facility operations and harm linked equipment.

Our Solution External rotor resistors limit the beginning current to only 2.5-3× rated current, safeguarding your electrical infrastructure while keeping the grid stable.

Challenge: Big equipment such as ball mills and crushers need instant torque at full load, which ordinary motors can't supply.

Our Solution: Wound rotor design delivers 1.8-2.2 times rated starting torque for smooth direct starts even with fully laden machinery.

Challenge: Material handling applications need frequent start-stop cycles, which result in accelerated mechanical wear and increased maintenance costs.

Our Solution: Staged resistance starting reduces mechanical stress, increasing equipment life and eliminating unexpected downtime.

Technical Advantages

Our YR series motors incorporate wound rotor structures with slip rings and brushes positioned at the motor rear. This configuration allows electrical connection to external resistance circuits, providing precise control over starting characteristics. The IP23 protection level ensures dust resistance suitable for harsh industrial environments. Premium SKF, NSK, or FAG bearings are available per your specifications. The three-phase asynchronous design delivers low noise operation, minimal vibration, and reliable performance across continuous duty cycles. Advanced insulation systems handle voltage fluctuations within ±5% tolerance, ensuring stable operation in variable grid conditions.

​​​​​​​Production Process

Our manufacturing follows strict quality protocols managed through SAP factory systems. Each motor undergoes precision winding of rotor coils with high-grade copper conductors. Slip ring assemblies receive specialized surface treatments for optimal conductivity and wear resistance. Stator laminations are laser-cut for minimal energy losses. Dynamic balancing procedures eliminate vibration sources before assembly. High-voltage insulation testing validates electrical integrity. Final performance testing under simulated load conditions verifies torque, current, and temperature parameters meet specification requirements.

Industry Applications

Mining Operations: Mine hoists and conveyor systems requiring controlled heavy-load starts

Metallurgical Plants: Rolling mills and metal forming equipment demanding high starting torque

Cement Production: Ball mills, vertical raw mills, and kiln drives with frequent start-stop cycles

Port Facilities: Heavy lifting equipment and container handling systems

Material Processing: Crushers, grinders, and wire drawing machines with variable load conditions

Customization Capabilities

We adapt motor specifications to match your exact operational requirements. Dimensional modifications accommodate existing mounting configurations and space constraints. Voltage and frequency adjustments ensure compatibility with regional power standards. Bearing upgrades extend service intervals in extreme temperature environments. Special winding configurations optimize performance for specific load profiles. Explosion-proof enclosures are available for hazardous locations. Our engineering team collaborates directly with you to develop solutions that integrate seamlessly into your systems.

Reliability Testing & Certifications

All slip ring wound rotor motor units carry CCC and CE certification demonstrating compliance with Chinese and European safety standards. ISO9001:2000 quality management systems govern our production processes. Railway industry CRCC certification validates suitability for transportation applications. Environmental certifications confirm sustainable manufacturing practices. Our quality documentation provides complete traceability from raw materials through final testing, supporting your equipment validation requirements.

Why Choose XCMOTOR

Authentic Components: We source exclusively from verified manufacturers, guaranteeing genuine parts in every motor.

Accelerated Delivery: Streamlined logistics ensure your equipment arrives when production schedules demand it.

Flexible Returns: Our 30-day return policy protects your investment during commissioning phases.

Continuous Support: Technical assistance operates seven days weekly, resolving issues before they impact your operations.

Competitive Value: Direct manufacturer relationships eliminate intermediary costs, delivering premium quality at market-leading prices.

Application Expertise: Two decades of field experience helps us recommend optimal motor specifications for your specific equipment and operating conditions.

FAQ

Q：What is YR series high voltage wound rotor motor?

A：YR series are 6kV/10kV high voltage three-phase wound rotor aSynchronous Motors, equipped with slip rings and brushes at the motor rear. External resistors or speed control devices can be connected to the rotor circuit. They are specially designed for high-power heavy-load equipment requiring high starting torque and limited grid impact.

Q：What are the core advantages of YR HV wound rotor motor compared with high voltage squirrel cage motors?

A：Starting with series rotor resistors brings low starting current, avoiding severe voltage drop of factory high-voltage grid. High starting torque enables direct full-load startup of heavy machinery. Stepped speed regulation is realized via external rotor resistors with low cost. These motors suit frequent loaded start-stop and impact load working conditions. Smooth non-impact startup can be realized by matching liquid resistance starter cabinet.

Q：Which industries and heavy equipment is YR high voltage wound rotor motor applicable to?

A：Widely used in mining, metallurgy, cement and port industries, matched with mine hoists, ball mills, vertical raw mills, heavy main belt drives, metallurgical rolling mills and port lifting equipment. Not recommended for light-load constant-speed equipment such as ordinary fans and water pumps.

Q：Why do slip rings and brushes spark violently during motor operation?

A：Carbon deposition and uneven wear on slip ring surface cause poor contact. Insufficient or unbalanced spring pressure of carbon brushes contributes to sparking. Over-worn brushes without timely replacement create problems. Loose connection or open circuit of external rotor resistance cabinet wiring affects performance. Dust and oil stains attached to slip rings lead to poor conductivity.

Q：What key maintenance items are required for YR high voltage wound rotor motor?

A：Clean carbon powder on slip rings regularly, polish worn rings and replace original matched brushes. Refill main bearing grease periodically, monitor bearing temperature, vibration and abnormal noise. Measure insulation resistance and DC resistance of high voltage stator windings annually. Fully inspect wiring, overheating and ablation of rotor starting resistance cabinet. Check slip ring chamber sealing to prevent dust and moisture intrusion. Tighten terminals of high voltage terminal box to eliminate discharge and overheating risks.

Contact Us

Ready to enhance your heavy-duty equipment performance with proven slip ring wound rotor motor technology? Our technical specialists stand ready to discuss your application requirements and recommend the ideal YR series configuration.

Email:  XCMOTORs@163.com">xcmotors@163.com