초록 ▼

A motor controller for a battery-powered electric motor automatically disables the motor when the battery voltage (1) remains below a first, higher level for a longer time when the motor is off, or (2) remains below a second, lower level for a longer time when the motor is on, or (3) falls below a l

A motor controller for a battery-powered electric motor automatically disables the motor when the battery voltage (1) remains below a first, higher level for a longer time when the motor is off, or (2) remains below a second, lower level for a longer time when the motor is on, or (3) falls below a low level less than about one quarter the nominal level of the voltage for a shorter time. The motor is automatically enabled when the battery voltage rises to a higher level for a preset time period, indicative of charging of the battery.

대표청구항 ▼

[ What is claim is:] [1.] 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

[ What is claim is:] [1.] 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.