Motor control apparatus

Abstract

A motor control apparatus capable of easily and reliably determining the completion of starting of a synchronous motor and not requiring an arithmetic unit having high processing ability for the determination. When an operation command including a predetermined target rotation speed is received in a state where the motor is at rest, PWM signals are created on the basis of a starting voltage set by a starting voltage setting section and a starting phase set by a starting phase setting section, whereby the motor is started. After the start of the motor, a starting rotation speed setting section makes the processing to increase the starting rotation speed. When the starting rotation speed reaches a predetermined value smaller than the target rotation speed, it is determined that the starting is completed, and a shift is made from starting operation to normal operation.

Dependencies are inferred from the claim text.