Patent ID: 6111731
Filing Date: 2000-08-29
Classification: H02H,H02J,Y02T

Abstract:
A motor controller for an electric motor, said motor controller comprising:a first conductor carrying a voltage signal indicative of a voltage level associated with the electric motor;a second conductor carrying a motor activation signal indicative of an on/off state of the motor;a comparison circuit responsive to the voltage signal and the motor-activation signal to generate a motor disable signal, said motor disable signal having a motor enable state and a motor disable state, said motor disable signal operative in the motor disable state to disable the motor, thereby preventing operation of the motor and interrupting operation of the motor if on, said comparison circuit operative to change state of the motor disable signal from the motor enable state to the motor disable state both (1) when the voltage signal falls below a first, higher level and the motor activation signal indicates that the motor is off, and (2) when the voltage signal falls below a second, lower level and the motor activation signal indicates that the motor is on.