What are the available power ratings and speeds?

We offer a wide range of models from 300W to 10kW with rated speeds varying from 100 RPM to 300 RPM.

How is the generator packaged and shipped?

The generator is protected with inner foam and packed in an outer plywood case. Shipping is available via sea (FCL/LCL) or air.

What is the efficiency of the generator?

The generator maintains an efficiency of over 85% with low mechanical resistance and energy loss.

3kw 5kw Brushless Outer Rotor Permanent Magnet Alternator

Name: 3kw 5kw Brushless Outer Rotor Permanent Magnet Alternator
Brand: Qingdao Greef New Energy Equipment Co., Ltd.
SKU: 781119822

Shandong, ChinaQingdao Greef New Energy Equipment Co., Ltd.

US$200.00-9,000.00

1 Set

Product profile

Customization

Available

Output Type

AC Three Phase

Generator Type

3 Phase AC Coreless Permanent Magnet Generator

Model NO.

GDG

Rated Power

300W to 10kw

Rated Speed

100-300rpm

Rated Voltage

12-400VAC

Start Torque

< 1 N.M

Generator Shell Material

Aluminum Alloy

Magnetic Material

ND-Fe-B

Structure

out Rotor

Lifetime

20 Years

Service

OEM

Transport Package

Plywood Case

Specification

Medium

Trademark

GREEF

Origin

China

HS Code

85016100

Production Capacity

1000 Sets/Year

Key features

Low Start Torque: Utilizes precise coil technology to achieve start torque below 1 N.M for efficient low-speed operation.

Coreless Disc Structure: Features a unique outer rotor design with coreless stator for reduced weight and volume.

High Efficiency: Delivers over 85% efficiency with low mechanical resistance and excellent heat dissipation.

Durable Materials: Constructed with high-stability Nd-Fe-B magnets and aluminum alloy shell for harsh environments.

Long Lifespan: Designed for a service life of 20 years, lasting 8 times longer than traditional motors.

Wide Power Range: Available in models ranging from 300W to 10kW with various rated speeds and voltages.

OEM Service: Full OEM customization services available for specific generator requirements.

3-Year Warranty: Comes with a free 3-year warranty covering parts and labor for quality issues.

Company profile

Qingdao Greef New Energy Equipment Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2014-03-18Nearest Port: QINGDAOAverage Response Time: ≤7.01hTerms of Payment: T/T, PayPal, Western Union, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DDP, CPT, Others, FCA

AI-Powered supplier vetting

SummaryQingdao Greef New Energy Equipment Co., Ltd. is identified as both a trading company and manufacturer/factory in China, offering wind turbines, permanent magnet generators, hybrid systems, and related equipment. Its stated capabilities include generator coverage from 500W to 5MW, two production lines, annual output of 1,000 wind turbine/permanent magnet generator sets, and 6–10 R&D engineers and quality-control staff. The company reports QHSE, ISO 9001, and HSE management certifications, CE-certified exports, warranty periods of 3–5 years, and after-sales service as part of its end-to-end offering. Evidence also supports customization through design, prototyping, production, and quality-control services. However, the provided information does not sufficiently establish financial credibility or a broad customer track record; only one buyer and one trade transaction are listed.

Supplier typeThe supplier is explicitly classified as both a Trading Company and Manufacturer/Factory. Its stated product portfolio includes wind turbine systems, permanent magnet generators, controllers, inverters, solar systems, and batteries, supporting a combined manufacturing and trading role.

CertificationsThe supplier states that its management systems include QHSE, ISO 9001, and HSE. It also states that products exported to Europe, South America, and North America carry CE certification, indicating documented management-system and product-certification claims.

After-Sales capabilityThe company describes end-to-end services including after-sales service and states that exported products have 3–5 year warranty periods. It also claims rapid response and guaranteed quality and on-time delivery through Alibaba Trade Assurance, providing explicit support for post-sale capability.

R&D capabilityThe supplier states that its permanent magnet generators range from 500W to 5MW and offers multiple renewable-energy technologies, including vertical- and horizontal-axis wind turbines, hybrid systems, and disc coreless generators. Its stated engineering and renewable-energy innovation activities support innovation capability, although no independently verified R&D results are provided.

Production capacityThe supplier reports two production lines and annual output of 1,000 wind turbine/permanent magnet generator sets. It also states generator coverage from 500W to 5MW and has 6–10 quality-control staff, providing explicit evidence of established production capacity.

Customization capabilityThe company explicitly claims customized end-to-end solutions covering design planning, schematic development, 3D renderings, physical prototyping, volume production, quality control, and after-sales service. This directly supports customization capability across product-development and delivery stages.

Product Q&A

Q:What is the warranty period for the generator?

The generator comes with a free 3-year warranty starting from the shipment date. During this period, the company covers maintenance costs and freight for quality issues.

Q:What is the start torque of the magnetic generator?

The generator features a very low start torque, typically less than 1 N.M, allowing it to start generating power at very low wind speeds.

Q:What materials are used in the generator construction?

The generator uses high-stability Nd-Fe-B magnetic materials, an aluminum alloy shell, carbon steel shaft, and deep groove ball bearings.

Q:Is OEM service available for this product?

Yes, we provide full OEM services to customize the generator according to your specific requirements.

Q:What is the expected lifespan of the generator?

The generator is designed for a long life of 20 years, which is approximately 8 times longer than traditional motors.