Low Start Torque High Efficiency Maintenance-Free Coreless Permanent Magnet

The GREEF NEW ENERGY GDG series disc-type permanent magnet generator features an innovative iron-core-free design with both spindle and rotor assembled in a disc configuration. The stator remains fixed at the center while the rotor rotates on either side, with the spindle containing only windings without any iron core.

Both stator and rotor utilize a flat disc structure with axial air gap magnetic flux, arranged alternately along the axial direction for compact design. The generator's short axial length and large diameter make it ideal for multi-pole configurations, ensuring high power-to-mass ratio and supporting low-speed operation with low wind speed start capability.

The GDG series generators are characterized by small size, lightweight construction, compact structure, low energy consumption, and high efficiency. These features make them particularly suitable for direct-drive vertical axis wind turbines, where the rotor mounted on a vertical axis presents minimal wind resistance.

Available in two variants: outer rotor design (rotor shaft rotates with stationary casing, cable exits through shaft middle) and inner rotor type (fixed casing with rotating shaft, cable exits outside casing).

• Low Start Torque Technology: Innovative design eliminates hysteresis and gear notch effects, achieving exceptionally low start torque of less than 0.1 N*m for smooth and efficient startup
• High Efficiency: Core removal significantly reduces mechanical resistance and energy loss, enhanced by "Precise Coil" technology for optimal energy conversion
• Advanced Magnetic Design: Utilizes rare earth permanent magnets with multiple poles, small air gap, and high power density for substantial output power
• Maintenance-Free Gearless Direct Drive: Brushless operation eliminates regular maintenance requirements, contributing to longer service life and increased reliability
• Enhanced Reliability and Longevity: Special structural design provides higher power-to-volume and power-to-weight ratios with lifespan eight times longer than traditional generators
• Optimized Low Wind Performance: Maximizes energy utilization for wind turbines operating in low wind speed conditions
• Excellent Heat Dissipation: Aluminum alloy outer frame with specially designed internal structure ensures superior thermal management and enhanced durability

• Wind Power Generation: Significant potential in megawatt-class wind turbines, enhancing output density and overall system efficiency through reduced iron losses and hysteresis losses
• Renewable Energy: Widely applied in solar and wind power systems for efficient energy conversion and reliable operational performance
• Industrial Applications: Suitable for backup or auxiliary power supplies in industrial domains requiring efficient, lightweight, and dependable power sources
• Customized Solutions: Adaptable structure allows customization of power, rotational speed, and output voltage parameters to meet specific application requirements

Our Coreless Permanent Magnet Generators feature both inner-rotor and outer-rotor designs optimized with small air gap for maximum efficiency. Supporting 3-phase output with horizontal and vertical shaft types for versatile applications.

Mounting type can be customized to flange or foot mounted according to installation requirements. Designed as maintenance-free systems to reduce downtime and operational costs. Rated power options range from 0.05kW to 100kW.

Packaging: Secure foam and plywood cases

Delivery Time: 25 working days after order confirmation

Payment Terms: T/T, Western Union, MoneyGram, L/C

Product Packaging: Each unit is securely placed in custom-fitted foam inserts to prevent movement and protect against shocks. Enclosed in sturdy, double-walled corrugated cardboard boxes with additional protection from external impacts and environmental factors. All packaging materials are eco-friendly and recyclable.

Includes user manual, warranty card, and necessary accessories neatly organized within packaging. Outer boxes clearly labeled with handling instructions and product information.

Shipping Services: Reliable and efficient shipping via standard ground, expedited, or international options based on customer requirements. All shipments are tracked and insured for safety throughout transit.

Units undergo final quality inspection and secure packaging verification before dispatch. Customers receive tracking information upon shipment. Customized shipping solutions available for bulk orders to optimize cost and delivery time.