CRRC 5MW Air-to-Water Cooled Double Fed Induction Generator

CRRC 5MW air-to-water cooled doubly fed Induction generator is the domestically highest-power doubly fed Induction generator at present, delivering a rated output power of 5300 kW, a rated stator voltage of 6300 V, and a rated rotating speed of 1200 rpm, paired with a 6-pole structure and an H-class insulation system. It has a center height of 710 mm and a total unit weight of 17600 kg.

This generator adopts symmetrical radial ventilation air-to-water cooling structure, box-type frame and three-bearing supporting design, with IP54 protection grade for main body and IP23 for slip ring chamber, F-class winding temperature rise and 2049 V rotor open-circuit voltage, and achieves a rated efficiency of ≥97%. Its stator and rotor windings undergo vacuum pressure impregnation and rotary baking with H-class insulation, while the rotor is fitted with special corona-resistant insulation to boost resistance against converter harmonic surges. The symmetrical cooling loops balance temperature rise of bearings at both ends; the horizontally arranged heat exchanger of the air-water cooler reduces overall unit height and footprint, and the fanless hot air cooling design eliminates unplanned downtime caused by cooling fan faults. Equipped with Y/Y winding connection, it seamlessly integrates with mainstream wind power converter technologies, featuring superior mechanical and electrical strength and stable performance under variable wind farm conditions.

We provide full life-cycle support for the 5MW air-to-water cooled doubly fed Induction generator, including equipment supply, on-site installation and commissioning, maintenance training, spare parts provision, and ongoing technical troubleshooting services.

Advantages of CRRC 5MW Air-to-Water Cooled Double Fed Induction Generator

The symmetrical radial ventilation air-water cooling structure design ensures uniform temperature distribution in the motor windings, effectively extending the service life of the insulation system.
The symmetrical cooling circuit structure minimizes the temperature difference between the bearings at both ends, improving bearing operational reliability.
The use of a 6300V stator output voltage effectively reduces stator current, lowering the cost of other components and contributing to overall unit cost control.
The air-water cooler employs a horizontally positioned heat exchanger structure, effectively reducing the overall height and size of the unit.
The cooler features a fanless design, avoiding downtime losses caused by motor failure.

Technical Specifications

Rated Power:	5300 kW
Rated Speed:	1200 rpm
Rated Frequency:	50 Hz
Shaft Center Height:	710 mm
Rated Voltage:	6300 V
Rated Current:	406 A
Stator / Rotor Winding Connection:	Y / Y
Number of Poles:	6
Insulation Class:	H
Rotor Open-circuit Voltage:	2049 V
Protection Class:	IP54 / IP23 (Slip Ring Chamber)
Weight:	17600 kg

coming soon

Product Name	Rated Power	Rated Speed	Rated Voltage	Rated Current	Rated Frequency	Rated Efficiency	Protection Class	Cooling Method	Weight
1.5MW Generator	1560 kW	1800 rpm	690 V / 420 V	1090 A / 390 A	50 Hz	≥97%	IP54/IP23	Air-to-Air + Water Jacket	7200 kg
2.5MW Generator	2560 kW	1720 rpm	690 V	1877 A	50 Hz	N/A	IP54	IC666	8100 kg
3.3MW Generator	3400 kW	1720 rpm	690 V	2493 A	50 Hz	N/A	IP54	IC616	10000 kg
4.2MW Generator	4200~4300 kW	1720~1780 rpm	1140 V	637 A	50 Hz	N/A	N/A	IC2X	N/A
6.4MW Generator	6400 kW	1720 rpm	1140 V	962 A	50 Hz	N/A	N/A	IC26	11500 kg
1.5MW AAC Generator	1560 kW	1800 rpm	690 V / 420 V	1090 A / 390 A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	7200 kg
2MW AAC Generator	2150 kW	1200 rpm	690 V / 401 V	1506 A / 624 A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	9500 kg
2.XMW AAC Generator	2280~2600 kW	1650~1820 rpm	690 V	N/A	50 Hz	≥96.5%	IP54/IP23 (Slip Ring Chamber)	IC616	7500 kg
4.XMW AAC Generator	3600~4200 kW	1200 r/min	690 V	N/A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	N/A
1.5MW Plateau AAC Generator	1567 kW	1735 rpm	690 V / 300 V	1138 A / 459 A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	Air-to-Air Cooling	7600 kg
2MW Plateau AAC Generator	2150 kW	1800 rpm	690 V / 389 V	1506 A / 590 A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	7800 kg
2.5MW Plateau AAC Generator	2600 kW	1200 rpm	690 V / 415 V	1822 A / 665 A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	Air-to-Air Cooling	11300 kg
2.5MW Low Temp AAC Generator	2600 kW	1200 rpm	690 V / 415 V	1820 A / 670 A	50 Hz	97%	IP54/IP23	IC666	11900 kg
2MW AWC Generator	2150 kW	1755 rpm	690 V / 312 V	1540 A / 614 A	50 Hz	≥97%	IP54/IP23	Air-to-Water Cooling	6500 kg
3.XMW AWC Generator	3100~3750 kW	700~1380 rpm	690 V	N/A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	IC86W	12500 kg
5MW AWC Generator	5300 kW	1200 rpm	6300 V	406 A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	Air-to-Water Cooling	17600 kg
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CRRC 5MW Air-to-Water Cooled Double Fed Induction Generator
Rated Power	5300 kW	Rated Speed	1200 rpm
Rated Voltage	6300 V	Rated Current	406 A
Rated Frequency	50 Hz	Rated Efficiency	≥ 97 %
Number of Poles	6	Stator / Rotor Winding Connection	Y / Y
Rotor Open-circuit Voltage	2049 V	Shaft Center Height	710 mm
Insulation Class	H	Winding Temperature Rise Class	Class F
Motor Weight	17600 kg	Protection Grade	IP54 / IP23 (Slip Ring Chamber)
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Squirrel cage wind turbine generator

Product Model

Rated Power

Rated Speed

Rated Frequency

Center Height

Number of Poles

Stator Rated Voltage

Stator Rated Current

Stator Winding Connection

Rated Efficiency

Power Factor

Insulation Class

Cooling Method

Motor Weight

Protection Class

2.5MW Generator

2650 kW

1550 rpm

51.4 Hz

630 mm

750 V

2307 A

Delta (△)

≥97%

≥0.88

Air-to-Air Cooled

8350 kg

IP54

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Permanent magnet wind generator

Product Model	Rated Power	Rated Voltage	Number of Phases	Protection Class	Rotational Speed	Rated Current	Weight
7.6MW Semi-direct PMSG	7600 kW	690 V	N/A	N/A	278 rpm	3347 A	48.5 t
3.6MW Semi-direct PMSG	3830 kW	690 V	3	IP54	350 rpm	N/A	17.5 t
3MW Integrated Semi-direct PMSG	3200 / 3400 / 3620 kW	710 V	3	IP54	480 / 526 / 550 rpm	N/A	12 t
1.5MW Direct-drive PMSG	1580 kW	720 V	6	IP23	16.6 – 20.5 rpm	720 A	44 t
2.0MW Direct-drive PMSG	2120 kW	720 V	2×3	IP54	14 rpm	2×1006 A	49 t
2.5MW Direct-drive PMSG	2650 kW	690 V	2×3	IP54	13.5 – 16 rpm	2×1394 A	53 t
3.0MW Direct-drive PMSG	3350 kW	690 V	2×3	IP54	12.2 – 13.9 rpm	2×1800 A	69 t
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General Infomation of CRRC Stator Coils for Wind Turbines Above 1.5MW
Product Model	7MW	Stator slots	192
Rated voltage	1400 V	Winding pitch	1-11
Turns per coil	6	Weight	4.05 kg
Scale	1:01
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Technical Requirements

When the voltage phase sequence of the three-phase power supply is the same as the order of the terminal letters U, V, W on the motor terminals, the motor shall rotate counterclockwise when viewed from the shaft extension end; the bearing grease shall be BEM41-141, the lubrication cycle of the front and rear bearings is 0.5g or a similar amount of lubricating oil to be added every 8 hours, and the specific operation shall refer to the centralized lubricator operation manual.

Wind Power (Business Layout)

production-base

Wind Power (Market Situation)

As of December 2022, Yongji Electric has provided the wind power market with over 50,000 wind turbines (103GW), distributed across more than 1,800 wind farms both domestically and internationally. It comprehensively covers all wind power installation areas in China, accounting for 37% of the total number of wind turbines in operation, ranking first in the domestic market share.

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