Patent ID: 7638961

Claim:
A drive system including a motor that is driven with a supply of electric power from a certain power source and is capable of generating back emf, said drive system comprising: a shutoff structure that disconnects the supply of electric power from the certain power source to the motor; and a control module that receives a supply of electric power from the certain power source via the shutoff structure, the shutoff structure being turned on by a start circuit in response to the supply of electric power from the certain power source via a switch that is connected in parallel to the shutoff structure to provide the supply of electric power to the control module in a system-on state, the control module operates and controls at least the motor in the system-on state, and in response to a system-off instruction, controls the motor to stop and controls the shutoff structure to disconnect the supply of electric power from the certain power source after elapse of a preset reference time period since start of the control of stopping the motor.