Patent ID: 9093931
Filing Date: 2015-07-28
Classification: H02P

Abstract:
1. A driving apparatus, which drives a motor by supplying power from a power supply apparatus to the motor having a stator around which a plurality of coils are wound and a rotor, comprising: an inverter unit, having a switching element provided for each coil, configured to energize the coil by switching ON and OFF of the switching element; an energization pattern determination unit configured to select from a plurality of energization patterns one by one, each of which indicates a direction of a current that flows through the coil, when driving of the motor is started, and energizing the coil by switching ON and OFF of the switching element based on a selected energization pattern at a duty ratio corresponding to a value of a maximum current capable of being supplied by the power supply apparatus only for a time for which the rotor does not rotate; a current applied time measurement unit configured to measure an energization time, which is a time until a value of the current flowing through the coil reaches a predetermined target current value for each energization pattern; and a rotor stop position estimation unit configured to: