MOTOR CONTROL DEVICES AND METHODS

摘要

A system and method for preventing damage to a controller of an electric motor in a vehicle from back electromotive force, the vehicle having a battery, includes monitoring, in a circuit path, a voltage and a rotational speed generated by back-driving the motor. If power is supplied to the controller by the battery, the method includes comparing the voltage to an upper voltage threshold, comparing the rotational speed to an upper rotational speed threshold, and, if the voltage exceeds the upper voltage threshold or the rotational speed exceeds the upper rotational speed threshold, clamping the circuit path to the battery to charge the battery with the voltage. The method is performed by an electronic controller that may detect the voltage and rotational speed via controller ports, sensor transmissions, and the like.

主权项

1. A method of managing power generation of an electric motor that is in electrical communication with a controller, the method comprising:
monitoring a rotational speed of a drive shaft of the electric motor; comparing the rotational speed to an upper rotational speed threshold; and limiting a voltage on a circuit path between the electric motor and the controller,the voltage being generated by the electric motor, when the rotational speed is greater than the upper rotational speed threshold.