MOTOR DRIVING APPARATUS, VACUUM CLEANER, AND HAND DRYER

A motor driving apparatus according to the present invention is a motor driving apparatus that drives an electric blower including a single-phase PM motor. The motor driving apparatus includes: a single-phase inverter that applies an alternating-current voltage to the single-phase PM motor; a rotor position detecting unit 7 that outputs, to an inverter control unit, a position detecting signal which is a signal corresponding to a rotational position of a rotor of the single-phase PM motor; a motor current detecting unit that outputs, to the inverter control unit, a signal corresponding to a motor current flowing to the single-phase PM motor; and the inverter control unit that outputs a driving signal to corresponding one of switching elements of the single-phase inverter on the basis of the position detecting signal and the motor current. The single-phase inverter performs control to increase or decrease effective electric power supplied to the single-phase PM motor, and the air blower changes an air volume by the increase or decrease in the effective electric power.