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Coreless Permanent Magnet Generator with Low Start Torque High Efficiency and Maintenance-Free Design for Heavy Duty Applications

Brand Name:

Greef

Certification:

Model Number:

GDG

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Product Details

Start Torque:

<0.03 N*m

Winding Method:

Power Range:

0.2-100 KW

Mounting Type:

Flange Or Foot Mounted

Generator Efficiency:

>92%

Phase Type:

3 Phase

Payment & Shipping Terms

Minimum Order Quantity

1Set

Price

Negotiable

Packaging Details

Foam+plywooden Case

Delivery Time

25 Working Days

Payment Terms

T/T,Western Union,MoneyGram,L/C

Supply Ability

High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03 N*m) and Axial Flux Design for Industrial Applications

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High Efficiency >92% Coreless Permanent Magnet Generator with Low Start Torque <0.03N/M and Coreless Wire Coil Stator

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High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03N/M) and Rare Earth Permanent Magnet for Industrial Applications

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High Efficiency Coreless Permanent Magnet Generator with Aluminum Alloy Shell and Low Noise Operation for Microgrid Systems

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Product Description

Inner Rotor Multi Poles Rare Earth Permanent Magnet Solutions

Product Overview

The GREEF NEW ENERGY GDG series features a disc type permanent magnet generator that operates without an iron core. In this innovative design, the spindle and rotor are arranged in a disc-shaped stack, with the stator fixed at the center while the rotor rotates on both sides. The spindle contains only windings without an iron core, and both stator and rotor are constructed as flat disc structures utilizing axial air gap magnetic flux.

The alternating arrangement of stator and rotor along the axial direction, combined with the generator's short axial length and large diameter, easily supports multi-pole configurations. This structure delivers a high power-to-mass ratio, low speed rating, and enables starts even at low wind speeds. Additional benefits include compact size, low energy consumption, lightweight construction, and high efficiency.

Due to low aerodynamic resistance from vertical axis rotor mounting, the GDG series is ideal for direct-drive vertical axis wind turbines. Available in two variants: outer rotor type (stationary shaft with rotating casing, cable exit through shaft center) and inner rotor type (stationary casing with rotating shaft, cable exit from outside casing).

Key Features

Low Start Torque Technology: Less than 0.1 N*m starting torque due to absence of hysteresis and gear notch effects
High Efficiency: Eliminated core reduces mechanical resistance and energy loss with "Precise Coil" technology
Advanced Magnetic Design: Rare earth permanent magnets with multiple poles and small air gap for high power density
Gearless Direct Drive System: Maintenance-free brushless construction for improved reliability
Higher Reliability and Longevity: Special structural design provides eight times longer lifespan than traditional generators
Enhanced Low Wind Speed Utilization: Superior performance at low wind speeds for maximum power generation
Excellent Heat Dissipation: Aluminum alloy outer frame with specialized internal structure for thermal management

Technical Specifications

Parameter	Specification
Efficiency	>92% (high efficiency)
Generator Shell Material	Aluminum Alloy
Shaft Material	Steel
Structure	Inner/Outer Rotor
Start Torque	<0.03 N*m
Noise Level	Low Noise Operation
Winding Method	Y
Stator	Coreless Wire Coil
Phase Type	3 Phase
Mounting Type	Flange Or Foot Mounted

This Coreless Permanent Magnet Generator is designed for customization according to your requirements, offering customized options and ensuring high efficiency performance.

Applications

Wind Power Generation: Ideal for megawatt-class wind turbines with enhanced output density and efficiency through eliminated iron core reducing iron and hysteresis losses
Renewable Energy: Widely used in solar power generation systems and other sustainable energy solutions for efficient energy conversion
Industrial Applications: Suitable for diverse industrial applications requiring efficient, lightweight, and dependable power sources as backup or auxiliary power supplies
Customized Applications: Flexible design allows customization of power output, rotational speed, and voltage parameters for various operational scenarios

Customization Options

Greef offers customized Coreless Permanent Magnet Generators (model GDG) from Qingdao with CE certification. Minimum order quantity: 1 set with negotiable pricing. We specialize in both outer-rotor and inner-rotor generator designs using rare earth permanent magnets for efficient, reliable operation with low noise levels.

Mounting types can be customized as flange or foot mounted. Shafts are made of durable steel for long-lasting performance. Packaging includes foam and plywood cases for safe delivery. Delivery time: approximately 25 working days. Payment terms: T/T, Western Union, MoneyGram, and L/C. Strong supply capability with Wending Method Y for enhanced operational stability.

Packaging & Shipping

Product Packaging: Each Coreless Permanent Magnet Generator is wrapped in anti-static bubble wrap and placed in custom-fitted foam inserts within sturdy corrugated cardboard boxes. Packaging is designed to absorb shocks and prevent movement during shipping, with clear handling instructions and product labeling.

Shipping: Reliable shipping via trusted courier services with tracking available. Options include standard ground, expedited air, or express delivery. All shipments are insured against loss or damage. Customers receive confirmation emails with tracking details upon dispatch.

Ratings& Review

Overall Rating

5.0

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

All Reviews

L*s

Czech Republic May 4.2023

Helpful (4)

“I built a small pico hydro system on the creek behind my off-grid cabin. The water head is only 3 meters and flow rate around 0.2 m³/s – too low for most generators. This axial flux coreless unit starts generating usable power at just 150 RPM. No cogging, no iron loss, and it’s silent. I’m getting 300-400W continuously, 24/7. My old induction generator would barely light an LED at that speed. Absolutely perfect for low-head hydro.”

Tags：

Coreless Permanent Magnet Generator with Low Start Torque High Efficiency and Low Noise Operation for Precision Equipment

Get Best Price

High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03 N*m) and Axial Flux Design for Industrial Applications

Get Best Price

High Efficiency >92% Coreless Permanent Magnet Generator with Low Start Torque <0.03N/M and Coreless Wire Coil Stator

Get Best Price

High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03N/M) and Rare Earth Permanent Magnet for Industrial Applications

Get Best Price

High Efficiency Coreless Permanent Magnet Generator with Aluminum Alloy Shell and Low Noise Operation for Microgrid Systems

Get Best Price

Send your inquiry directly to us

Qingdao Greef New Energy Equipment Co., Ltd

Coreless Permanent Magnet Generator with Low Start Torque High Efficiency and Maintenance-Free Design for Heavy Duty Applications

High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03 N*m) and Axial Flux Design for Industrial Applications

High Efficiency >92% Coreless Permanent Magnet Generator with Low Start Torque <0.03N/M and Coreless Wire Coil Stator

High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03N/M) and Rare Earth Permanent Magnet for Industrial Applications

High Efficiency Coreless Permanent Magnet Generator with Aluminum Alloy Shell and Low Noise Operation for Microgrid Systems

Overall Rating

Rating Snapshot

All Reviews

low speed dc generator

low rpm wind generator

magnetic energy generator

Coreless Permanent Magnet Generator with Low Start Torque High Efficiency and Low Noise Operation for Precision Equipment

High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03 N*m) and Axial Flux Design for Industrial Applications

High Efficiency >92% Coreless Permanent Magnet Generator with Low Start Torque <0.03N/M and Coreless Wire Coil Stator

High Efficiency (>92%) Coreless Permanent Magnet Generator with Low Start Torque (<0.03N/M) and Rare Earth Permanent Magnet for Industrial Applications

High Efficiency Coreless Permanent Magnet Generator with Aluminum Alloy Shell and Low Noise Operation for Microgrid Systems