Low Start Torque High Efficiency Maintenance-Free Coreless Permanent Magnet Generator for Wind Power

GREEF NEW ENERGY GDG Series Disc Type Permanent Magnet Generator features a unique coreless design where the spindle and rotor are arranged in a disc shape. The stator is fixed at the center while rotors spin on both sides, with the spindle containing only windings and no iron core.

Both stator and rotor adopt a flat disc structure using axial air gap magnetic flux, alternately positioned along the axial direction. The short axial length combined with wide diameter allows for multi-pole configuration, resulting in high power-to-mass ratio, low operational speed, and ability to start at low wind speeds.

The GDG series offers compact size, low energy consumption, lightweight construction, and high efficiency, making it ideal for direct-drive vertical axis wind turbines. Available in outer rotor (stationary shaft, rotating casing) and inner rotor (rotating shaft, stationary casing) variants.

• Low Start Torque Technology: Starting torque less than 0.1 N·m with no hysteresis or gear notch effects
• High Efficiency: Coreless design eliminates mechanical resistance and energy loss
• Precise Coil Technology: Rare earth permanent magnets with multiple poles and small air gap for high power density
• Gearless Direct Drive: Brushless design ensures minimal maintenance and increased reliability
• Enhanced Reliability: Eight times longer lifespan than traditional generators
• Low Wind Speed Optimization: Improved energy capture in low wind conditions
• Superior Heat Dissipation: Aluminum alloy frame with specialized internal structure

• Wind Power Generation: Ideal for megawatt-class wind turbines with enhanced output density and reduced iron losses
• Renewable Energy Systems: Solar and wind energy generation with efficient energy conversion
• Industrial Power Supply: Backup and auxiliary power sources for machinery and equipment
• Customized Solutions: Tailored power output, rotational speed, and voltage levels

GREEF offers customized Coreless Permanent Magnet Generators (model GDG) designed and manufactured in Qingdao with CE certification. Features include small air gap, coreless structure, low start torque, and higher reliability.

Available with three-phase type, air-cooled cooling method, 50/60Hz frequency, and rated voltages of 48V/96V. Minimum order quantity: 1 set with negotiable pricing. Delivery within 25 working days with secure foam and plywood packaging.

Payment terms: T/T, Western Union, , and L/C.

Each generator is securely wrapped in protective foam and placed in sturdy custom cardboard boxes with multiple cushioning layers. Clear handling instructions and product details are provided.

Shipping options include standard, expedited, and freight services. All shipments are tracked and insured. Please inspect packages upon receipt and notify immediately of any damage.