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China Suppliers Factory Coreless Permanent Magnet Generator for Low RPM Applications (0.5kW-10kW)
Key Advantages
Ultra-Low Starting Torque
Eliminates hysteresis and gear notch effects, achieving starting torque < 0.1 N·m for effortless operation.
High Efficiency
Coreless design minimizes mechanical resistance, reducing energy loss during conversion.
Precise Coil Technology
Optimized electromagnetic performance ensures stable power generation across all RPM ranges.
Advanced Magnetic Design
Rare-earth permanent magnets with multi-pole configuration provide high power density and output.
Maintenance-Free Operation
Gearless direct-drive and brushless design eliminate wear-prone components for long-term reliability.
Enhanced Durability
Compact structure delivers superior power-to-volume/weight ratios with 8× longer lifespan vs. traditional generators.
Low-Wind Optimization
Maximizes energy utilization in wind speeds as low as 3 m/s, extending operational range.
Thermal Efficiency
Aluminum alloy casing and internal heat dissipation design ensure stable performance under load.
This generator is ideal for renewable energy applications requiring high efficiency, low maintenance, and reliable performance in varying conditions.
Product Features
| No. | Feature Description |
|---|---|
| 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. |
| 9 | Customized : Voltage, Speed, Power, Frequency etc. |
| 10 | H class insulation, vacuum pressure impregnation. |
| 11 | Excellent heat dissipation , also can add fan cooling |
Specification
| 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 | <0.5 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 | 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% | ||||
| Wending Method | Y | ||||
| Insulating Resistance | 100Mohm Min(500V DC) | ||||
| Leakage Level | <5 ma | ||||
| Start Torque | <1 N/M | <0.5 N/M | <1 N/M | ||
| Phase Type | 3 Phase | ||||
| Structure | Out rotor | ||||
| Stator | Coreless wire coil | ||||
| Rotor | 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 | ||||
| Shaft material | Carbon steel | ||||
| Bearing | Deep groove ball bearing | ||||
System Solution
Greef Technical Team can provide the complete ON-grid and Off-grid solution for the project which used our permanent magnet generator. All the equipments can be produced according to customer's specific requirements.
Product Display
Frequently Asked Questions (FAQ)
What makes the starting torque of this generator so low?
The generator utilizes a coreless design combined with a patented "Precise Coil" technology. This eliminates hysteresis and gear notch effects, allowing the starting torque to remain exceptionally low (starting torque < 0.1 N·m to < 1 N·m depending on the specific model).
What are the benefits of a coreless, gearless direct-drive structure?
A coreless, gearless direct-drive design significantly reduces mechanical resistance and energy loss. It also decreases the overall volume and weight of the unit while delivering a much higher power-to-weight/volume ratio and a lifespan up to 8 times longer than traditional motors.
Can the generator be customized for specific project requirements?
Yes, key specifications including Voltage, Speed, Power, and Frequency can be fully customized to meet your specific application needs.
How does the generator perform in terms of heat dissipation?
The generator features an outer frame constructed from high-grade aluminum alloy and a specialized internal structure that provides excellent thermal efficiency. Additionally, cooling fans can be integrated for enhanced heat dissipation in extreme environments.
Does the Greef Technical Team provide integration support?
Yes. The Greef Technical Team offers complete ON-grid and Off-grid system solutions tailored to projects utilizing our permanent magnet generators, with all ancillary equipment built to customer requirements.
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