Method for controlling traction chain of electric car, involves disconnecting windings from circuit if bearing parameters meet given activation conditions such that rotor is freely driven in rotation by driving wheels

摘要

The method involves checking whether a motor torque and a required braking torque are zero by an electronic control unit (E1). A determination is made by the electronic control unit to check whether bearing parameters e.g. acceleration, speed and a slope meet given activation conditions (E2) if the engine torque and the braking torque are zero. Windings are disconnected (E3) from a circuit if the parameters meet the activation conditions such that a rotor is freely driven in rotation by driving wheels, where the rotor transmits the motor torque to the wheels.