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Nom de marque:
Greef
Certification:
CE
Model Number:
GDG
The GREEF NEW ENERGY GDG series disc-type permanent magnet generator is a unique kind of generator that features a spindle and rotor arranged in a disc shape. In this design, the stator is fixed at the center while the rotor rotates on both sides. Notably, the spindle contains only the windings and does not include an iron core.
Both the stator and rotor are designed as flat disc structures that utilize axial air gap magnetic flux. They are arranged alternately along the axial direction, which contributes to the generator’s efficient operation. This structural design, characterized by a short axial length and a large diameter, facilitates the creation of multi-pole configurations.
Due to these design advantages, the GDG series generators boast a high power-to-weight ratio, operate efficiently at low speeds, start at low wind speeds, and maintain a compact and lightweight form factor. Additionally, they consume less energy and exhibit high efficiency. Their compact and robust structure makes them particularly well-suited as the preferred choice for direct-drive vertical axis wind turbines. This is primarily because the rotor attached to the vertical axis wind turbine offers minimal resistance to wind flow.
The GDG series disc-type permanent magnet generators come in two variants: the outer rotor type and the inner rotor type. In the outer rotor configuration, the casing remains stationary while the shaft rotates, and the electrical cable exits through the center of the shaft. Conversely, in the inner rotor design, the casing rotates with the shaft, but the cable is routed outside the casing.
The technology eliminates hysteresis and gear notch effects, resulting in an exceptionally low starting torque of less than 0.1 N·m. This feature allows for smoother and more efficient startup performance.
By removing the core, the design significantly reduces mechanical resistance and energy losses. Utilizing "Precise Coil" technology enhances the overall efficiency and performance of the system.
The generator employs rare earth permanent magnets with multiple poles and a small air gap. This configuration achieves a high power density and delivers a substantial output power, optimizing the device’s energy output.
The brushless, gearless direct drive mechanism eliminates the need for maintenance. This design not only improves reliability but also reduces mechanical complexity and potential points of failure.
A unique structural design provides a larger power-to-volume and power-to-weight ratio. Consequently, the system boasts a lifespan that is eight times longer than traditional generators, ensuring long-term dependable operation.
This generator offers greater utilization efficiency for wind turbines operating in low wind conditions, enabling energy production even when wind speeds are minimal.
Heat dissipation is enhanced through the use of an aluminum alloy outer frame combined with a specially designed internal structure, maintaining optimal operating temperatures and improving durability.
| Maintenance | Low Maintenance Due To No Iron Core Losses, ensuring higher reliability |
| Bearing Brand | NSK |
| Blade Material | Aluminium Alloy |
| Start Torque | <0.03N/M, providing low start torque for efficient operation |
| Life Time | 20 Years |
| Generator Material | Aluminium Body + Copper Wire + Nd-Fe-B |
| Rotor | Rare Earth Permanent Magnet, outer-rotor generator design |
| Winding Method | Y |
| Speed | 60-550 RPM |
| Insulating Resistance | 100 Mohm Min (501V DC) |
Axial flux coreless generators demonstrate significant potential in the field of wind power generation. This is particularly true for megawatt-class wind turbines, where these generators can greatly enhance output density, thereby improving the overall efficiency of wind power systems.
One of the key advantages of axial flux coreless generators is the absence of an iron core. This design feature helps to minimize iron losses and hysteresis losses, which contributes to higher efficiency and better performance in wind energy applications.
Beyond wind power, axial flux coreless generators are widely utilized in various renewable energy technologies, including solar and wind power systems. Their excellent energy conversion efficiency and dependable operation make them highly suitable for renewable energy generation.
Apart from renewable energy, axial flux coreless generators find applications in different industrial settings that demand efficient, lightweight, and reliable power sources. For instance, they can serve as backup or auxiliary power units, providing stable and consistent power support to critical industrial equipment.
Thanks to the flexible design of axial flux ironless core generators, these devices can be tailored to meet the specific requirements of various customers. Adjustments can be made to parameters such as generator power, rotational speed, and output voltage to suit diverse application scenarios.
Greef offers customization services for the Coreless Permanent Magnet Generator, model GDG, originating from Qingdao. This CE-certified generator features a rare earth permanent magnet rotor, ensuring low start torque of less than 0.03N/M for efficient performance. With a power output range from 100W to 100kW and operating speeds between 60-550RPM, it supports large output power suitable for various applications.
The multi-poles design enhances the generator's efficiency and reliability. Each unit is carefully packaged using foam and plywooden cases to ensure safe delivery within 25 working days. Greef accepts flexible payment terms including T/T, Western Union, MoneyGram, and L/C, with a minimum order quantity of 1 set.
Maintenance requirements are minimal due to the absence of iron core losses, ensuring longevity and durability. Pricing is negotiable, and the supply ability is robust to meet customer demands. Trust Greef for high-quality, customizable coreless permanent magnet generators tailored to your specific needs.
Product Packaging and Shipping
Our Coreless Permanent Magnet Generator is carefully packaged to ensure it arrives in perfect condition. Each unit is securely placed in a custom-fitted foam insert within a sturdy cardboard box to protect against shocks and vibrations during transit.
The packaging materials are designed to be environmentally friendly, using recyclable and biodegradable components wherever possible.
For shipping, we offer multiple options including standard ground, expedited air, and international freight, depending on your location and urgency.
All shipments are tracked, and customers will receive a tracking number once the order has been dispatched. We work with trusted carriers to guarantee timely and safe delivery.
If you require special packaging or shipping arrangements, please contact our customer service team prior to placing your order.
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