CRRC 7.6MW Semi-Direct Drive Permanent Magnet Synchronous Generator

CRRC 7.6MW semi-direct drive permanent magnet synchronous generator is developed for 7MW semi-direct wind turbine units, tailored for offshore and heavy salt mist operating environments. Its ultra-compact structure pioneers lightweight design for large-capacity offshore wind generators, filling domestic technical blank of 8MW-class semi-direct generator test platforms. The unit has passed CGC marine certification to satisfy strict offshore project requirements. We provide full life-cycle support for the 7.6MW semi-direct drive permanent magnet synchronous generator, including equipment supply, on-site installation and commissioning, maintenance training, spare parts provision, and ongoing technical troubleshooting services.

Advantages of CRRC 7.6MW Semi-Direct Drive Permanent Magnet Synchronous Generator

The generator adopts a dual cooling design. The stator is equipped with a water cooling system featuring an innovative structure, while the rotor poles adopt an air-water cooling system, delivering high cooling efficiency and high power density..
It is designed with Class H corona-resistant insulation structure, which can withstand the high voltage change rate and peak voltage generated by converters.
The pole assembly adopts a fully sealed structure. Permanent magnets are fitted with a special anti-corrosion structure and have passed environmental tests including damp heat, salt spray, mould, and high-low temperature thermal shock, improving operational reliability under harsh working conditions.
Key components are manufactured from low-temperature resistant and vibration-resistant materials to enhance the generator’s low-temperature tolerance and vibration damping performance.
The generator features low current and voltage harmonics, as well as low vibration and noise levels.
It achieves low temperature rise with ample temperature margin and high operating efficiency.
The entire generator is treated with C5-M grade anti-corrosion coating for superior weather resistance.
This generator has obtained CGC (China General Certification) certification.

Technical Specifications

Rated Power:	7600 kW
Rated Voltage:	690 V
Rated Speed:	278 rpm
Rated Current:	3347 A
Rated Frequency:	50 Hz
Power Factor:	0.95
Rated Efficiency:	98%
Cooling System:	IC3W5
Insulation Class:	Class H
Anti-corrosion Class:	C5-M

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Product Model	Rated Power	Rated Voltage	Rated Speed	Weight	Number of Phases	Protection Class	Rated Current
1.5MW Direct-Drive PMSG	1580 kW	720 V	16.6 ~ 20.5 rpm	44 t	6	IP23	720 A
2MW Direct-Drive PMSG	2120 kW	720 V	14 rpm	49 t	2×3	IP54	2×1006 A
2.5MW Direct-Drive PMSG	2650 kW	690 V	13.5 ~ 16 rpm	53 t	2×3	IP54	2×1394 A
3MW Direct-Drive PMSG	3350 kW	690 V	12.2 ~ 13.9 rpm	69 t	2×3	IP54	2×1800 A
3MW Integrated Semi-direct PMSG	3200 / 3400 / 3620 kW	710 V	480 / 526 / 550 rpm	12 t	3	IP54	N/A
3.6MW Semi-direct PMSG	3830 kW	690 V	350 rpm	17.5 t	3	IP54	N/A
7.6MW Semi-direct PMSG	7600 kW	690 V	278 rpm	48.5 t	N/A	N/A	3347 A
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CRRC 7.6MW Semi-Direct Drive Permanent Magnet Synchronous Generator
Rated Power	7600 kW	Rated Speed	278 rpm
Rated Frequency	50 Hz	Rated Current	3347 A
Rated Voltage	690 V	Power Factor	0.95
Rated Efficiency	98%	Cooling System	IC3W5
Insulation Class	Class H	Anti-corrosion Class	C5-M
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Double fed induction generator

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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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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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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