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

Low Start Torque Coreless Permanent Magnet Generator

High Efficiency Axial Flux Generator

Maintenance-Free Permanent Magnet Alternator

Brand Name:

Greef

Certification:

Model Number:

GDG

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Product Details

Insulating Resistance:

100Mohm Min(501V DC)

Rated Power:

500W - 100 KW

Winding Method:

Shaft Type:

Horizontal And Vertical

Corestructure:

Coreless

Frequency:

50/60hz

Phase Type:

Rated Voltage:

48v/96v

Highlight:

Low Start Torque Coreless Permanent Magnet Generator

High Efficiency Axial Flux Generator

Maintenance-Free Permanent Magnet Alternator

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,,L/C

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Product Description

Speed 100-500RPM Small Air Gap Coreless Motor Technology

Enhancing precision and durability in various industrial sectors

Product Overview

GREEF NEW ENERGY GDG Series Disc Type Permanent Magnet Generator

The GDG series disc type permanent magnet generator, developed by GREEF NEW ENERGY, features a unique design without an iron core. In this generator, the spindle and rotor are arranged in a disc shape, with the stator fixed centrally while the rotor rotates on both sides. Notably, the spindle contains only windings and does not include an iron core.

Both the stator and rotor adopt a flat disc structure, utilizing axial air gap magnetic flux. The stator and rotor alternate in the axial direction, which allows for a compact design. Due to its short axial length combined with a large diameter, this disc generator can easily accommodate a multi-pole configuration, resulting in a high power-to-mass ratio.

This design offers several advantages, including a low rated speed, the ability to start at low wind speeds, compact size, reduced energy consumption, light weight, and overall high efficiency. These features make it especially suitable for direct-drive vertical axis wind turbines, where the rotor's vertical mounting produces minimal resistance to wind.

The GDG series disc type permanent magnet generators are available in two configurations: outer rotor and inner rotor types. In the outer rotor design, the shaft remains stationary while the casing rotates, and the cable exits through the center of the shaft. Conversely, the inner rotor design features a stationary casing with a rotating shaft, and the cable is routed outside the casing.

Key Features

Low Start Torque Technology: The absence of hysteresis and gear notches results in an extremely low starting torque, measuring less than 0.1 N*m. This allows for efficient and smooth operation right from startup.
High Efficiency: The design eliminates the core, which significantly reduces mechanical resistance and energy loss. Utilizing "Precise Coil" technology, the system achieves superior performance and energy conversion efficiency.
Advanced Magnetic Design: Featuring rare earth permanent magnets with multiple poles and a small air gap, this technology offers high power density and substantial output power, optimizing the overall performance of the device.
Maintenance-Free and Gearless Direct Drive: The gearless direct drive system is brushless, which minimizes mechanical wear and eliminates the need for regular maintenance, enhancing durability and reliability.
Enhanced Reliability and Longevity: A specialized structural design enables a higher power-to-volume and power-to-weight ratio. This results in a lifespan that is up to eight times longer than traditional generators.
Optimized Utilization in Low Wind Speeds: The technology allows wind turbines to operate more effectively under low wind speed conditions, maximizing energy capture and efficiency.
Superior Heat Dissipation: The aluminum alloy outer frame combined with a specially designed internal structure provides excellent heat dissipation, ensuring stable and reliable operation even under demanding conditions.

Technical Parameters

Parameter	Specification
Frequency	50/60 Hz
Speed	100-500 RPM
Core Structure	Coreless
Shaft Type	Horizontal and Vertical
Generator Material	Aluminum Alloy
Efficiency	>92%
Winding Method	Y
Insulating Resistance	100 MΩ Min (501V DC)
Phase Type	3
Cooling Method	Air Cooled

Applications

Wind Power Generation: Axial flux coreless generators hold significant promise in the field of wind power generation. This is especially true for megawatt-class wind turbines, where these generators can greatly enhance output density. As a result, the overall efficiency of wind power generation is substantially improved. One of the key advantages of these generators is the absence of an iron core, which helps to decrease iron losses and hysteresis losses.
Renewable Energy: Beyond wind power, axial flux coreless generators are widely utilized across various renewable energy applications, including both solar and wind energy systems. Their high efficiency in energy conversion combined with dependable operation makes them a preferred choice for renewable energy generation technologies.
Other Industrial Applications: Apart from renewable energy, these axial flux coreless generators are also valuable in other industrial sectors that demand efficient, lightweight, and reliable power solutions. For instance, they can serve as backup or auxiliary power sources, ensuring stable power supply to critical industrial equipment.
Customized Applications: Due to the adaptable design of the axial flux coreless generator, it can be tailored to meet specific customer requirements. Adjustments can be made to various parameters such as generator power output, rotational speed, and voltage levels, enabling its use in diverse application scenarios.

Customization Options

Greef offers customized Coreless Permanent Magnet Generators under the model number GDG, originating from Qingdao. These generators are CE certified, ensuring higher reliability and excellent performance. With a small air gap design, our outer-rotor generators provide efficient cooling through an air-cooled method, suitable for rated voltages of 48v or 96v and frequencies of 50/60Hz.

The rated power range spans from 500W to 100KW, catering to diverse application needs. Each unit undergoes strict quality checks, including insulating resistance tests of 100Mohm Min (501V DC), guaranteeing durability and safety.

Order Details:

Minimum Order Quantity: 1 set

Pricing: Flexible options negotiable

Delivery Time: Approximately 25 working days

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

Packing and Shipping

Product Packaging: The Coreless Permanent Magnet Generator is carefully packaged to ensure maximum protection during transportation. Each unit is securely wrapped with anti-static foam and placed inside a custom-fitted, sturdy cardboard box. The box is then sealed with tamper-evident tape and labeled with handling instructions such as "Fragile" and "Handle with Care". Multiple units are packed into larger cartons with additional cushioning materials to prevent movement and damage.

Shipping: We offer reliable shipping options worldwide. The Coreless Permanent Magnet Generator is shipped via trusted carriers with tracking available for all orders. Depending on the destination, shipping methods include air freight, sea freight, and express courier services. All shipments comply with international shipping regulations and are accompanied by the necessary documentation to ensure smooth customs clearance. Estimated delivery times vary based on location and shipping method selected.

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：

Air Cooled Coreless Permanent Magnet Generator with 100Mohm Min Insulating Resistance and Low Start Torque for Industrial Applications

Get Best Price

Video

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

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Aluminum Alloy Coreless Permanent Magnet Generator with Low Start Torque and High Efficiency for Industrial Applications

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Video

Aluminum Alloy Coreless Permanent Magnet Generator with Low Start Torque and High Efficiency for Wind Power

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Qingdao Greef New Energy Equipment Co., Ltd

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