Wind Turbine Hub Motor

The wind turbine hub motor features an outer-rotor, permanent-magnet, direct-drive design. The turbine blades directly drive the rotation of the motor's outer rotor, eliminating the need for a gearbox; this reduces mechanical losses and enables power generation to start even at low wind speeds.

The product is suitable for small-scale distributed wind power, off-grid wind-solar-storage systems, residential wind turbines, and small-to-medium wind farms. It serves as a core power generation unit and supports customization of power ratings, voltage, and mounting flanges to accommodate various turbine blade assemblies. It is characterized by high reliability and resistance to sand, dust, and extreme temperatures.

Technical Specifications

Kit Contents (Complete Set)

Hub generator unit, flange connector, waterproof aviation plug, cable outlet sleeve, mounting fasteners, product manual.

Product Features

1. Low-Speed Direct Drive

The wind turbine hub motor features an outer-rotor, high-torque design that eliminates the need for a speed-increasing gearbox, allowing power generation to begin even at low wind speeds.

It offers high starting torque and superior wind energy utilization, boosting power output in low-wind areas and overcoming the startup difficulties common to standard generators.

2. Gearbox-Free Structure

By eliminating the gearbox and transmission components, the design reduces issues related to gear wear and oil leakage. The brushless structure minimizes routine maintenance requirements, making it ideal for unmanned wind farms in remote, mountainous, or island locations.

3. High Power Generation Efficiency

Utilizing a permanent magnet synchronous design, the motor achieves 94%–96% efficiency under rated conditions. The short transmission path and low mechanical losses result in higher power output under identical wind conditions, making it well-suited for integration into wind-solar-storage systems.

4. Highly Protective Housing

Designed for harsh outdoor environments, the unit features a high-strength, sealed aluminum alloy housing and reinforced winding insulation, with an IP54–IP65 protection rating.

It is resistant to wind, sand, and rain, and operates reliably across a wide temperature range (-40°C to +65°C). Suitable for mountainous and coastal (salt-spray) environments, it also offers customizable anti-corrosion coatings.

5. Modular Flange Mounting

Standardized mounting holes on the hub flange allow for direct connection to the wind turbine blade hub assembly.

ODM customization is available for voltage, power, flange dimensions, and cable exit direction; complete system packages, including controllers, rectifiers, and dump loads, can also be supplied.

6. Dual-Purpose Capability (Generator and Drive Motor)

The motor unit serves a dual purpose: it can function as a wind generator or as a low-speed, high-torque hub drive motor for specialized equipment applications.

Key Application Scenarios

● Small-scale residential wind turbines and distributed off-grid wind power systems

● Wind-solar hybrid energy storage stations; power supply for border defense and remote field base stations

● Small-to-medium horizontal-axis wind turbines and experimental prototype development

● Drives for specialized low-speed, high-torque equipment (motor mode)

FAQ

Q: What is the difference between a wind turbine hub motor and a standard wind turbine with a gearbox?

A: The wind turbine hub motor features a direct-drive, gearless design; it has fewer parts, a lower failure rate, starts well in low wind speeds, and requires low maintenance.

Models with gearboxes operate at higher speeds but are prone to gear wear and oil leaks, requiring regular oil changes and maintenance; they are suitable for high-power, large-scale wind turbine applications.

Q: At what wind speed does power generation begin?

A: This low-speed hub generator begins generating a small amount of power at a cut-in wind speed of approximately 2.5–3 m/s.

Rated output requires reaching the rated wind speed; higher wind speeds result in higher output power. Long-term operation exceeding the design's maximum wind speed limit is strictly prohibited.

Q: Can it be connected directly to a battery for charging?

A: No. The motor outputs AC power, so it must be connected to a dedicated wind turbine controller or rectifier/dump load unit before connecting to the battery. Direct connection can cause overcharging and burn out the motor windings.

Q: Can it be used in coastal environments with salt spray?

A: The standard version is suitable for general outdoor use; however, for coastal or island locations, we recommend the customized salt-spray-resistant version, which features an anti-corrosion treated housing.

Additionally, ensure wiring connections are waterproofed to prevent salt spray corrosion on the terminals.

Q: What causes the motor to stop generating power?

A: ① Blade speed has not reached the cut-in speed

② Loose wiring terminals or oxidized aviation connectors (due to water ingress)

③ Controller malfunction

④ Broken winding wire

⑤ Permanent magnet demagnetization.

Check the wiring and controller first, then measure the three-phase AC output.

Q: Is it normal for the generator to heat up during operation?

A: A rise in temperature occurs when operating under load; a housing temperature of up to 70°C is considered normal.

If it becomes excessively hot, check for overload, short circuits, or obstructions blocking heat dissipation; reduce the load and troubleshoot the issue.

Q: Can it be used as a drive motor?

A: Yes. This permanent magnet synchronous unit can function as a low-speed hub drive motor when paired with a compatible drive controller. We recommend specifying the operating conditions when ordering so we can adjust winding parameters accordingly.

Q: What regular maintenance is required?

A: 1. Periodically check the tightening torque of flange bolts.

2. Inspect the waterproof seals of aviation connectors and clean off any dust or sand.

3. Check cables for signs of aging or wear.

4. Periodically replenish bearing grease; gearless models do not require gear oil changes.

Q: Can the three-phase output be converted to single-phase output?

A: The motor itself produces a three-phase AC output, which cannot be directly converted to single-phase. Conversion requires a rectifier to change the output to DC, followed by an inverter to supply single-phase AC to the load.

Q: Do you provide a warranty?

A: Qianjiang provides a warranty; the complete unit is covered for 12 months against non-human-induced damage.

Damage caused by lightning strikes, operation beyond rated conditions (e.g., during typhoons), seawater corrosion, unauthorized disassembly or modification, or impact by foreign objects is not covered by the warranty.