slip ring rotor motor
Voltage range：380V±5%
Power range：45-800kW
Protection level：IP23
Application：YRQ(JR) series medium-sized motors can drive a variety of different machinery, such as fans, compressors, water pumps, crushers, ball mills, cutting machine tools, transportation machinery and other equipment, and can be used in coal mines, machinery industries, power plants and various industrial and mining enterprises. Used as prime mover.
Advantage: The JR series medium-sized motors have very powerful driving capabilities and can not only drive conventional mechanical equipment, but also some complex mechanical equipment. For example, it can drive heavy machinery such as ships, cranes, and wind turbines, as well as small household appliances, purifiers, compressors, etc.
Others： SKF, NSK, FAG bearings can be replaced according to customer requirements.
- Product Description
Slip Ring Rotor Motor – Heavy-Duty Solutions for Industrial Applications
Modern industrial operations demand reliable power solutions that handle heavy loads efficiently. Traditional squirrel-cage motors often struggle with high starting currents and insufficient torque for demanding equipment. The slip ring rotor motor addresses these challenges through its wound-rotor design, featuring slip rings and brush assemblies that connect rotor windings to external resistors. This arrangement allows for regulated starts with little inrush current and provides higher starting torque for crushers, ball mills, mine hoists, and metallurgical equipment. Knowing what these characteristics are enables you to pick the best drive solution for your heavy-duty applications.
Slip Ring Rotor Motor Manufacturer and Supplier
Shaanxi Qihe Xicheng Electromechanical Equipment Co., Ltd. specializes in providing comprehensive power equipment solutions backed by over 20 years of industry experience. We maintain partnerships with more than 30 leading motor manufacturers including ABB, Siemens, Wolong, NEC, and XEMC, ensuring access to premium components and trusted brands.
Our product offering features the YRQ (JR) series with specifications including:
· Voltage range: 380V±5%
· Power range: 45-800kW
· Protection level: IP23
· Optional SKF, NSK, FAG bearings
All products carry CCC, CE, ISO9001:2000, CRCC, and CQC certifications, guaranteeing quality standards that meet international requirements.
Pain Points vs. Solutions
Your Challenges:
· High starting current causes voltage drops across your plant power grid
· Insufficient starting torque prevents smooth heavy-load startup
· Frequent starts damage standard motors
· Limited speed control options restrict operational flexibility
Our Solutions:
The YRQ series wound-rotor structure connects external starting resistors through slip rings, controlling starting current at 2-3 times rated current (versus 5-7 times for cage motors). Starting torque reaches 1.8-2.5 times rated torque, ensuring reliable heavy-load startup. External resistors enable stepped speed regulation, while robust construction withstands shock loads and frequent starting cycles.
Technical Advantages
High Starting Torque, Low Inrush Current
External rotor resistance reduces starting current significantly while maintaining powerful starting torque, protecting your power grid from voltage fluctuations.
Flexible Speed Control
Series resistors in the rotor circuit enable multi-step speed regulation, adapting to varying load conditions without additional equipment.
Superior Shock Load Resistance
Robust design handles impact loads during operation, making these motors ideal for crushing, grinding, and lifting applications.
Stable Operation
Proven slip ring rotor motor technology delivers consistent performance in demanding environments with minimal failure rates.
Production Process
Our manufacturing follows rigorous quality protocols:
1. Material Selection: Only components from certified suppliers meet our specifications
2. Winding Technology: Precision rotor winding ensures balanced operation
3. Assembly Standards: SAP factory management system tracks every production stage
4. Quality Testing: Multi-point inspection verifies electrical and mechanical parameters
5. Final Validation: Load testing confirms performance meets design specifications
Industry Applications
The JR series motors power essential equipment across multiple sectors:
· Mining: Ball mills, mine hoists, heavy belt conveyors
· Metallurgy: Winches, rolling mills, material handling systems
· Cement: Crushers, rotary kilns, raw material grinders
· Port Operations: Lifting equipment, ship loaders
· Power Plants: Coal handling systems, ash removal equipment
Not recommended for standard fans, pumps, or variable frequency drive applications where cage motors perform adequately.
Customization Capabilities
We adapt motors to your specific requirements:
· Dimensional adjustments for installation constraints
· Bearing upgrades (SKF, NSK, FAG) for extended service life
· Starting resistor configuration matching your load profile
· Special protection levels for harsh environments
· Voltage modifications for non-standard power systems
Our engineering team analyzes your application details and recommends optimal configurations based on actual operating conditions.
Reliability Testing & Certifications
Every motor undergoes comprehensive testing before shipment. Our quality certifications demonstrate commitment to excellence and compliance with international standards across electrical safety, quality management, environmental stewardship, and energy efficiency.
Why Choose XCMOTOR
Proven Supply Chain: Direct relationships with leading manufacturers ensure authentic parts and competitive pricing.
Technical Expertise: Over two decades solving complex power equipment challenges gives us deep application knowledge.
Complete Support: From product selection through installation and ongoing maintenance, we provide dedicated assistance.
Customer Benefits:
· Original products from trusted brands only
· Fast delivery with free shipping
· 30-day return policy
· Support available every day including weekends
We help you choose high-efficiency, low-consumption motors with stable power delivery, recommending specific brands, series, and models matching your actual needs.
FAQ
Q：What is JR series low voltage wound rotor motor?
A：JR series are general industrial low voltage three-phase wound rotor aSynchronous Motors, equipped with slip ring and brush assemblies. External starting resistors can be connected to the rotor. They fit 380V industrial low-voltage power grid and are mainly applied to heavy-load startup conditions.
Q：Is direct short-circuit startup of slip rings allowed for JR series motor?
A：Direct slip ring short-circuit startup is strictly prohibited. All starting resistors must be connected to rotor circuit before startup, and resistors shall be cut off step by step during acceleration. Direct short-circuit will generate huge surge current, burn stator and rotor windings and damage transformers. The slip rings can only be short-circuited for continuous operation after the motor reaches rated speed.
Q：What application fields and equipment are JR motors suitable for?
A：Applicable to mining ball mills, mine hoists, heavy belt conveyors, metallurgical winches, crushers and port lifting equipment. Not recommended for ordinary fans, water pumps or long-term light-load variable frequency speed regulation scenarios.
Contact Us
Ready to solve your slip ring rotor motor heavy-duty starting challenges? Our team is prepared to discuss your application requirements and recommend the optimal motor solution.
Email: XCMOTORs@163.com">xcmotors@163.com
