Electric vehicle electric wheel drive technology
Electric wheel drive technology
As an independent driving component, the electric wheel is a unique driving unit that integrates the motor, transmission mechanism, brake and other components into the hub.
The electric wheel-driven electric vehicle cancels the conventional mechanical differential, and it is necessary to adjust the rotational speed of both sides to achieve the differential function during steering.
The left and right wheels of a conventional vehicle are connected by a mechanical steering trapezoid. Generally, on a good road surface, the driving forces of the left and right steering wheels generate substantially equal torques around the kingpin, and the directions are opposite, thus canceling each other out.
While the electric wheel drive vehicle is independently controllable according to the torque of each wheel, the driving forces of the left and right steering wheels can be unequal when turning, and the torque of the driving force to the kingpin axis can no longer cancel each other, that is to say, the driving steering torque is not It is zero again. Since the two steering wheels are connected by a steering trapezoid, driving the steering torque will drive the steering of the two steering wheels.
Therefore, for the electric wheel-driven car, while ensuring the straight-line driving stability, the output torque of the left and right steering wheels can be controlled in real time according to a certain rule, and the driving steering torque generated can be used to realize the power steering.
