The integrated wheel motor integrates the motor, controller and auxiliary devices into the wheel rim to form an independent drive unit.
Features
Compact structure: The motor and controller are designed as an integrated whole, reducing external connectors and saving space.
Efficient energy conversion: Directly drive the wheels, eliminating the transmission system, and improving energy conversion efficiency by 10%-15%.
Lightweight design: Taking Protean Electric's Protean Drive as an example, the system mass is about 34kg and the power density is 2.2kW/kg.
High power output: It can provide 75kW maximum power and 995N·m peak torque to meet high performance requirements.
Technical advantages
Improved drive efficiency
The direct drive method reduces mechanical transmission loss, reduces vehicle energy consumption by 8%-12%, and extends the cruising range.
Optimized handling performance
Independently control the torque of each wheel, realize electronic differential and precise steering, and improve grip on slippery roads by 30%.
Improved space utilization
The motor has a built-in wheel rim, which frees up space inside the vehicle. For example, the rear floor height of a city bus is reduced by 200mm, which improves the efficiency of passengers getting on and off the bus.
Reduced maintenance costs
The number of transmission parts is reduced by 50%, the maintenance time is shortened by 40%, and the annual maintenance cost is reduced.
Application scenarios
Passenger car field
High-end electric vehicles: For example, GAC Trumpchi EV uses four-wheel independent drive, and the acceleration time from 0 to 100 km/h is shortened to within 5 seconds.
Unmanned vehicles: The hub motor realizes four-wheel independent steering, the minimum turning radius is reduced, and the passability of narrow urban roads is improved.
Commercial vehicle field
City bus: The low-floor design improves passenger convenience, and the failure rate of the hub motor drive system is reduced.
Logistics distribution vehicle: The compact structure adapts to narrow urban streets and increases cargo space.
Special vehicles
Military vehicles: Four-wheel independent drive improves off-road passability and increases wading depth.
Airport shuttle bus: Silent operation meets airport noise restrictions and reduces electromagnetic interference.
Maintenance points
Regular inspection
Appearance cleaning: clean the dust on the hub motor housing every month and check the tightness of the wiring screws.
Insulation test: use a megohmmeter to detect the insulation resistance every quarter to ensure >0.5MΩ.
Maintenance of key components
Bearing lubrication: clean and replace the grease every 20,000 kilometers to reduce wear.
Braking system: check the wear of the disc brake every 10,000 kilometers and replace it when the thickness is <2mm.
Cooling system management
Coolant replacement: replace the water cooling system coolant every 3 years or 100,000 kilometers to prevent corrosion.
Fan cleaning: clean the dust on the cooling fan every six months to ensure that the air duct is unobstructed.
Fault handling
Abnormal vibration: stop the machine immediately to check the gap between the motor stator and the rotor. If the deviation is >0.1mm, it needs to be adjusted.
Overheating alarm: stop the machine for cooling when the temperature exceeds 150℃ and check the cooling system fault.