CRRC 2.XMW Air-to-Air Cooled Doubly Fed Induction Generator

CRRC 2.XMW air-to-air cooled doubly fed Induction generator is a modular, wide-power-range high-efficiency power generation solution, covering rated output power from 2280 kW to 2600 kW, a rated rotating speed range of 1650~1820 rpm, a rated stator voltage of 690 V, and a 4-pole structure paired with an H-class insulation system, with a center height of 500 mm and a total unit weight of 7500 kg. It adopts IC616 air-to-air cooling mode, featuring IP54 protection grade for stator and IP23 for slip ring chamber, with a rotor open-circuit voltage of 2128V±20V and a rated efficiency of ≥96.5%.

Designed without top-drive fan and built-in axial fan, this generator equips self-ventilated slip ring chamber with self-suction air duct to control carbon brush temperature below 85°C, and low-resistance air duct with dedicated ventilation blades to boost cooling efficiency. The integrated rotor winding design adopts integral welding and full dipping treatment; special bearing insulation material limits system capacitance below 0.1nF to block high-frequency current and restrain bearing electrolytic corrosion. Combined with forward design, modal simulation and experimental verification, it achieves low temperature rise, low vibration, low noise and low harmonic content, delivering stable energy conversion performance under extreme wind farm conditions including plateau, severe cold, high temperature, high humidity, sandstorm and coastal salt fog.

As a mature doubly fed design with △/Y winding connection, it seamlessly integrates with mainstream wind power converter technologies. Built on a unified series platform to support customized modular configurations for diversified project demands, and certified by China General Certification (CGC), it ensures reliable grid compatibility and long-term operational stability for onshore wind farms.

We provide full life-cycle support for the 2.XMW air-to-air 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 2.XMW Air-to-Air Cooled Doubly Fed Induction Generator

The motor features a top-less fanless, fanless design, based on a series platform, and can be modularly designed to meet user needs, offering various motor configurations and services to maximize user benefits.
It features an integrated, high-reliability rotor winding design, with the rotor winding and lead system integrally welded and impregnated.
The self-ventilated slip ring system chamber design utilizes a self-suction airflow path, allowing the carbon brush temperature to be controlled at 85℃.
A low-resistance air duct with special ventilation blades effectively improves cooling system efficiency.
Special materials are used to achieve a bearing insulation system capacitance of <0.1nF, enhancing high-frequency current blocking capability.
Through forward design, modal simulation optimization, and experimental verification, the motor achieves low temperature rise, low vibration, and low noise.
It can be widely used in various operating environments in onshore wind farms, including high-altitude, frigid, high-temperature, high-humidity, sandstorm, and salt spray conditions.
It has passed CQC certification.

Technical Specifications

Rated Power:	2280 – 2600 kW
Rated Speed:	1650 – 1820 rpm
Rated Frequency:	50 Hz
Shaft Center Height:	500 mm
Rated Stator Voltage:	690 V
Stator / Rotor Winding Connection:	△ / Y
Number of Poles:	4
Insulation Class:	H
Open-Circuit Rotor Voltage:	2128 V ± 20 V
Protection Class:	IP54 / IP23 (Slip Ring Chamber)
Cooling Method:	IC616
Weight:	7500 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 2.XMW Air-to-Air Cooled Doubly Fed Induction Generator
Rated Power Range	2280 – 2600 kW	Rated Speed Range	1650 – 1820 rpm
Rated Frequency	50 Hz	Stator Rated Voltage	690 V
Number of Poles	4	Stator / Rotor Winding Connection	Δ / Y
Shaft Center Height	500 mm	Rated Efficiency	≥ 96.5 %
Insulation Class	H	Power Factor	0.95 ind ~ 1 ~ 0.95 cap
Cooling Method	IC616	Rotor Open-circuit Voltage	2128 V ± 20 V
Motor Weight	7500 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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