MOTOR DRIVE APPARATUS, COMPRESSOR, AIR CONDITIONOR, REFRIGERATOR, ELECRIC WASHING MACHINE, ELECTRIC CLEANER, ELECTRIC DRYER AND HEAT PUMP WATER HEATER

摘要

A motor driving apparatus includes an inverter circuit for converting an output of a rectifier circuit connected to a single-phase AC power supply into a driving voltage, and outputting the driving voltage to a brushless motor, and an inverter control unit for controlling the amplitude value of the voltage outputted from the inverter to the brushless motor so as to minimize a difference between a command rpm indicated by an external command signal and an actual rpm derived from an estimated phase of the rotor, wherein the command rpm is set to an rpm outside a predetermined range of rpms.