Patent ID: 8330399
Filing Date: 2012-12-11
Classification: B62D,H02J,H02P

Abstract:
1. An electric power steering apparatus that generates a steering assist force by a motor, comprising: a driving circuit that drives the motor and having an efficiency η; a battery as a main power supply that supplies an electric power to the motor; an auxiliary power supply that supplies an electric power to the motor; a voltage detector that detects a voltage V a voltage detector that detects a voltage V a charge-discharge circuit that charges the auxiliary power supply by using the main power supply and that selectively configures a first output mode in which an electric power is supplied to the motor based on the voltage V a control circuit that supplies the electric power to the motor and selects the output mode of the charge-discharge circuit according to an electric power required for steering assist and that, on the basis of an upper limit value I