Patent ID: 8203297
Filing Date: 2012-06-19
Classification: H02P

Abstract:
1. A motor control apparatus comprising: a power supply function of supplying electric power from a power supply to a motor; a rotational position detecting function of performing detection of a rotational position of a rotor of said motor for respective phases of said motor, and outputting first rotational position data indicative of result of said detection; a control function of controlling a power supply operation of said power supply function in accordance with said first rotational position data; and an induced voltage detecting function of performing detection of induced voltages of said respective phases of said motor; wherein said control function controls said power supply operation of said power supply function in accordance with result of said detection performed by said induced voltage detecting function when said first rotational position data are abnormal, wherein said control function acquires second rotational position data indicative of a rotational position of said rotor of said motor for said respective phases of said motor on the basis of result of said detection performed by said induced voltage detecting function when at least one of said first rotational position data is abnormal, and controls said power supply operation of said power supply function in accordance with said second rotational position data, and wherein, when at least one of said first rotational position data is normal and at least one of said first rotational position data is abnormal, said control function acquires one of said second rotational position data corresponding to said abnormal one of said first rotational position data on the basis of result of said detection performed by said induced voltage detecting function, and controls said power supply operation of said power supply function in accordance with said first rotational position data excluding said abnormal one of said first rotational position data and one of said second rotational position data corresponding to said abnormal one of said first rotational position data.