Key specification for this permanent magnet motor: model number PMG Series. Everything below is reproduced from the factory data sheet. Made by Qingdao Greef New Energy Equipment Co., Ltd. (13 years on the platform, factory-assessed). For a binding price and lead time, send the volume you need and where it ships to.
Key Features of This Permanent Magnet Motor
- Model Number: PMG Series
- Generator Material: Aluminium body+copper wire+Nd-Fe-B
- Rated Rotor Speed: 80-180RPM
- Warranty: 3 Years
- Place Of Origin: Shandong, China
- Generator Type: Axial Flux Permanent Magnet
Technical Specifications
| Place Of Origin | Shandong, China |
|---|---|
| Brand Name | GreeF |
| Model Number | PMG Series |
| Generator Type | Axial Flux Permanent Magnet |
| Phase Type | 3Phase AC |
| Rated Rotor Speed | 80-180RPM |
| Portection Grade | IP 54 |
| Bearing Brand | NSK |
| Start Torque | <1N/M |
| Structure | outer rotor |
| Efficiency | >85% |
| Generator Material | Aluminium body+copper wire+Nd-Fe-B |
| Warranty | 3 Years |
| Selling Units | Single item |
| Single Package Size | 50.00X50.00X50.00 cm |
| Single Gross Weight | 50.0 kg |
Product Details
1 | Torque Patent Technology: use newest “Precise Coil” technology. No hysteresis and gear notches effect make the start torque very low <0.3N.M |
2 | Original Structure: use disc coreless motor to take place traditional motor makes it less volume and weight. |
3 | Higher Utilization: use special coreless motor technology to eliminate the use bottlenecks of lower speed wind energy. |
4 | Higher Reliability: special structure make it bigger ratio of power to volume, power to weight and have long life of 8 times longer than traditional motor. |
5 | Gearless, direct drive, low RPM generator. |
6 | High standard, quality components for use in harsh and extreme environments for wind turbines |
7 | High efficiency and Low mechanical resistance energy loss |
8 | Excellent heat dissipation due to the Aluminum alloy outer frame and special internal structure. |










Model | GDG-0.5KW-200 | GDG-1KW-180 | GDG-1KW-200 | GDG-2KW-120 | GDG-2KW-180 | ||||
Rated Power | 0.5KW | 1KW | 1KW | 2KW | 2KW | ||||
Rated Rotate Speed | 200 RPM | 180RPM | 200RPM | 120RPM | 180RPM | ||||
Rated Voltage | 56Vac | 56Vac | 56Vac | 115Vac | 115Vac | ||||
Rated Current | 9A | 12A | 17.9A | 10A | 17.4A | ||||
Efficiency | >85% | ||||||||
Wending Method | Y | ||||||||
Insulating Resistance | 100Mohm Min(500V DC) | ||||||||
Leakage Level | <5 ma | ||||||||
Start Torque | <0.1N/M | <0.3 N/M | <0.3 N/M | <0.5 N/M | <0.3 N/M | ||||
Phase Type | 3 Phase | ||||||||
Structure | Out rotor | ||||||||
Stator | Coreless wire coil | ||||||||
Rotor | Rare Earth Permanent Magnet | ||||||||
Generator Shell Diameter | 320 | 380 | 380 | 550 | 450 | ||||
Generator Shell Length | 232 | 241 | 241 | 330 | 258 | ||||
Weight | 20 | 32 | 32 | 75 | 51 | ||||
Shaft drameter | 45 | 50 | 50 | 78 | 59 | ||||
Generator shell material | Aluminum alloy | ||||||||
Shaft material | Carbon steel | ||||||||
Bearing | Deep groove ball bearing | ||||||||
Model | GDG-3KW-100 | GDG-3KW-180 | GDG-5KW-100 | GDG-5KW-150 | GDG-10KW-100 | ||||
Rated Power | 3KW | 3KW | 5KW | 6KW | 10KW | ||||
Rated Rotate Speed | 100RPM | 180RPM | 100RPM | 150RPM | 100RPM | ||||
Rated Voltage | 380VAC | 380VAC | 380VAC | 380VAC | 400VAC | ||||
Rated Current | 4.6A | 4.7A | 7.6A | 15.2A | 14.5A | ||||
Efficiency | >85% | >85% | >88% | >88% | >88% | ||||
Wending Method | Y | Y | Y | Y | Y | ||||
Insulating Resistance | 100Mohm Min(500V DC) | 100Mohm Min(500V DC) | 100Mohm Min(500V DC) | 100Mohm Min(500V DC) | 100Mohm Min(501V DC) | ||||
Leakage Level | <5 ma | <5 ma | <5 ma | <5 ma | <5 ma | ||||
Start Torque | <1 N/M | <0.5 N/M | <0.5 N/M | <1 N/M | <1N/M | ||||
Phase Type | 3 Phase | 3 Phase | 3 Phase | 3 Phase | 3 Phase | ||||
Structure | Out rotor | Out rotor | Out rotor | Out rotor | Out rotor | ||||
Stator | Coreless wire coil | Coreless wire coil | Coreless wire coil | Coreless wire coil | Coreless wire coil | ||||
Rotor | Rare Earth Permanent Magnet | Rare Earth Permanent Magnet | Rare Earth Permanent Magnet | Rare Earth Permanent Magnet | Rare Earth Permanent Magnet | ||||
Generator Shell Diameter | 620 | 550 | 700 | 620 | 770 | ||||
Generator Shell Length | 410 | 330 | 400 | 410 | 590 | ||||
Weight | 110 | 65 | 125 | 110 | 245 | ||||
Shaft drameter | 80 | 78 | 98 | 80 | 85 | ||||
Generator shell material | Aluminum alloy | Aluminum alloy | Aluminum alloy | Aluminum alloy | Aluminum alloy | ||||
Shaft material | Carbon steel | Carbon steel | Carbon steel | Carbon steel | Carbon steel | ||||
Bearing | Deep groove ball bearing | Deep groove ball bearing | Deep groove ball bearing | Deep groove ball bearing | Deep groove ball bearing | ||||








2.Pakage size and weight please refer to our sales.
3.Shipping by sea with FCL LCL or by air .


(1) The warranty period is start from the date of shipment which show on the bill of loading or air waybill.
(2) Free maintenance services during the warranty period the cost involved be borne by the company, do not charge a fee to customers, free warranty if any damage outside the warranty period, the company will charge a fee for labor costs and materials.
(3) the warranty period, company's quality problems caused by the maintenance of the freight borne by the company, if not under warranty or man-made damage, the freight charges by the customer.




Ordering and Pricing
- Minimum order quantity: 1 set
- Ships from: China
- Customization: OEM and ODM accepted on qualifying volumes.
Frequently Asked Questions
What is the minimum order quantity for this permanent magnet motor?
The standard minimum order quantity is 1 set. Trial orders can usually be arranged for buyers evaluating the product before a full production run.
What warranty is provided?
The manufacturer provides a 3 Years warranty. Spare parts and technical support remain available after the warranty period.
Do you accept OEM or custom branding?
Yes. Custom logo, colour, packaging and specification changes are accepted on qualifying order volumes. Send your artwork and technical requirements with your enquiry.
How long does production and delivery take?
In-stock configurations typically ship within 7–15 days. Customised or large-volume orders are usually produced in 25–35 days, confirmed on order.
About the Manufacturer
This product is produced by Qingdao Greef New Energy Equipment Co., Ltd., based in China. The company 13 years as a verified Alibaba.com supplier, operates its own manufacturing, passed third-party supplier assessment. Browse the full Qingdao Greef New Energy Equipment Co., Ltd. range on HVACR Nexus.
See more in External Rotor Motors on HVACR Nexus.



















