The working principle of in-wheel motors is permanent magnet synchronous motors. Wheel-side motors and in-wheel motors refer to motors with different positions where the motors are installed in the vehicle. [1] To speak plainly, “in-wheel motors” are the “power system, transmission System, brake system “are designed together.
Advantages of in-wheel motors:
Advantage 1: Omit a large number of transmission parts, make the vehicle structure simpler
Advantage 2: Can realize a variety of complicated driving methods [2]
Because the in-wheel motor has the characteristics of independent driving of a single wheel, it can be easily implemented whether it is front-wheel drive, rear-drive or four-wheel drive.
Disadvantages of Hubei Motor Motor:
1. Although the quality of the vehicle has greatly decreased, the quality of the unsprung has been greatly improved, which will have a huge impact on the control, comfort and suspension reliability of the vehicle.
2. Cost, high conversion efficiency and light weight of four-wheel hub motors remain high.
3. Reliability issues. Put the precision motor on the hub, and the long-term severe up and down vibration and the bad working environment (water, dust) bring the problem of failure. Also consider the hub part is the easily damaged part in the accident High maintenance costs.
4, the problem of braking heat and energy consumption, the motor itself is heating, due to the increase of the unsprung mass, the braking pressure is greater, and the heating is also greater. Such concentrated heating has high requirements for braking performance.