Golden Motor GMX Hypertorque 7KW Axial Flux Motor

The GMX HyperTorque 7kW is a 72V axial flux motor that delivers 18kW peak and 110 N·m of torque straight off the shaft, with no gearbox, and weighs just 15 kg. It's a strong fit for lighter e-motorcycle conversions, go-karts, small utility vehicles and electric boats where you want serious torque without the size and weight of a radial motor.

Why the HyperTorque

• Huge torque for its size. The axial flux (YASA-type, single stator, double rotor) design packs far more torque per kilogram than a conventional radial motor of similar power.
• No gearbox needed. 110 N·m peak at the shaft means most builds can run a direct chain or belt drive.
• More top speed with field weakening. With a field-weakening controller, the motor can run up to about 60% above its rated speed without raising battery voltage.
• Efficient and quiet. Over 90% efficiency, low cogging torque and low noise, with regenerative braking support.
• Built in temperature sensing. A KTY84-130 sensor is installed so your controller can protect the motor.
• Sealed. IP65 rated, natural (passive) cooling.

Specifications

• Voltage: 72V
• Rated / peak power: 7 kW / 18 kW
• Rated / peak torque: 45 N·m / 110 N·m
• Rated / max speed: 1,950 / 3,800 rpm
• Rated current: 92 A
• Max phase current: 400 A for up to 30 seconds
• Efficiency: over 90%
• Pole pairs: 5
• Motor type: axial flux PMSM/BLDC, YASA-type single stator, double rotor, surface-mounted magnets
• Shaft: keyed (key slot)
• Protection: IP65
• Cooling: natural cooling
• Temperature sensor: KTY84-130
• Weight: 15 kg
• Rated working life: over 20,000 hours

Choosing a Controller

Size your controller to the power you'll actually use continuously. For this motor's 7kW rating we recommend the EZkontrol 72V Universal BLDC Controller in the B72800 size or larger. Oversizing is safe, since the motor only draws the current it needs. EZkontrol controllers support both sinusoidal (FOC) and trapezoidal control.

Your battery sets the voltage (72V nominal) and limits how much current you can safely pull, so set the controller's max bus current at or below your battery BMS's continuous rating.

Downloads and Wiring

• HyperTorque wiring and bench test
• 3D STEP file (keyed shaft) for mounting and bracket design

Need more power? The GMX HyperTorque 11kW steps up to 28kW peak and 160 N·m. Not sure which fits your build? Email Support@goldenmotor.bike and our team will help you spec it out.

Related Products

• BLDC Motor Controllers
• BLDC Throttles
• BLDC Motor Sprockets
• BLDC Motor Parts