Patent ID: 7764037
Filing Date: 2010-07-27
Classification: H02P

Abstract:
1. An electronic apparatus comprising: an electric motor; an operation member that performs a power-off operation of interrupting power supply from a power source and a power-on operation of starting the power supply; a timer member that clocks time on the basis of the power supplied from the power source; a power supply member that supplies the power to the electric motor and the timer member from the power source and interrupts the power supply thereto; a heat storage calculating member that calculates heat storage of the electric motor during drive of the electric motor and calculates heat storage of the electric motor after stop of the drive on the basis of the time clocked by the timer member; and a controller that controls the electric motor and controls the power supply member so as to start the power supply on the basis of the power-on operation of the operation member and interrupt the power supply on the basis of the power-off operation of the operation member, wherein the controller controls the power supply member so as to maintain the power supply to at least the timer member of the timer member and the heat storage calculating member during a predetermined time even after the power-off operation of the operation member, and wherein the heat storage calculating member has an initial value setting portion that sets the heat storage on the basis of time clocked by the timer member after the power-off operation as an initial value of the heat storage of the electric motor in the next power-on operation of the operation member.