CRRC Stator Coils for Wind Turbines Above 1.5MW

Stator coils for wind turbines above 1.5MW are core electromagnetic components tailored for high-power wind power generation systems, covering power ranges from 1.5MW to 7MW and above. Specifically engineered for permanent magnet synchronous generators and other mainstream wind turbine generators, these coils serve as the key to energy conversion, directly determining the efficiency, stability, and service life of wind turbine units. Crafted from high-conductivity copper conductors and advanced insulation materials, the coils adopt a vertical winding structure and are treated with the vacuum pressure impregnation (VPI) process, enabling them to meet the rigorous operational demands of high voltage, high current, and long-term continuous operation in complex outdoor environments.
As critical components for large-scale wind power equipment, these stator coils are fully compatible with both direct-drive and geared wind turbine systems, seamlessly matching the technical requirements of high-power generators. They are widely applied in onshore and offshore wind farms, capable of withstanding extreme conditions such as strong winds, temperature fluctuations, humidity, and salt spray. Backed by mature design and manufacturing capabilities, we offer customized solutions based on the specific power ratings, voltage levels, and structural dimensions of wind turbines, ensuring perfect adaptation to different generator models and operational scenarios. Meanwhile, we provide full-life-cycle technical support, covering coil design optimization, performance testing, on-site installation guidance, and after-sales maintenance services, to guarantee the reliable operation of wind turbine units.
We offer comprehensive life-cycle support for the stator coils, covering equipment supply, on-site installation and commissioning, maintenance training, spare parts provision, and ongoing technical troubleshooting services.

Advantages of CRRC Stator Coils for Wind Turbines Above 1.5MW

Optimized conductor cross-sectional area and winding density enable the coils to stably bear high currents and voltages required by 1.5MW+ wind turbines, realizing efficient energy conversion while minimizing power loss.
High-grade insulation materials paired with the vacuum pressure impregnation (VPI) process create a dense, bubble-free insulation layer, significantly enhancing voltage resistance and reducing insulation breakdown risks to adapt to large wind turbines’ high-voltage working environments.
High-precision vertical winding and strict tension control ensure tight coil turn arrangement, resisting vibration, impact, and centrifugal forces during long-term operation; special anti-corrosion/moisture-proof treatment also enables stable performance in harsh conditions (e.g., offshore salt spray, onshore low temperatures).
Scientific conductor arrangement and structural design, combined with copper’s high thermal conductivity, facilitate rapid heat dissipation—effectively controlling coil temperature rise and ensuring safe operation even under long-term full-load conditions.
High-durability materials and stable performance consistency reduce maintenance/replacement frequency; standardized modular design improves spare part compatibility, further lowering customers’ operation and maintenance costs.

Technical Specifications

Stator slots:	192
Rated voltage:	1400 V
Winding pitch:	1-11
Turns per coil:	6

Product Model	Motor Model	Rated Power	Rated Voltage	Rated Current	Rated Speed
3000 series skid motor	CDJD902	2000 kW	3300 V	402 A	500 r/min
5000 series skid motor	CDJD904	3155 kW	6600 V	320 A	865 r/min
7000 series skid motor	CDJD903	4420 kW	6600 V	450 A	776 r/min
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General Infomation of CRRC 5000 Series Skid Motor
Model	CDJD904(For YFQ190.63 1849000000000)	Code	CDJD904-000-000
Rated Power	3155 kW	Rated Voltage	4500 V
Rated Current	523 A	Rated Speed	865 r/min
Rated Torque	34833 N·m	Weight	8.5 t
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Model	Rated Power	Rated Voltage	Rated Speed	Rated Torque	Weight	Notes
CDJD904	3155	6.6	865	34833	8.5
CDJD904A	3155	6	865	34833	8.5	vs. CDJD904: Voltage class, Winding structure
CDJD904B	3155	6	865	34833	8.5	vs. CDJD904A: Air flow direction, Coating/dipping method
CDJD904C	3730	6.6	810	43992	9.5	vs. CDJD904B: Interface unchanged, Core lengthened.
CDJD904D	3730	6.6	865	41181	8.5	vs. CDJD904B: Same outline; Coil from CDJD904.
CDJD904E	3730	3.3	865	41181	9.5	vs. CDJD904C: Similar outline; NDE base plate flush (no protrusion); Side air outlets forward.
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