MOTOR DRIVING APPARATUS COMPOSED OF SINGLE-PHASE RECTIFIER CIRCUIT AND INVERTER

摘要

PURPOSE: A motor driving apparatus is provided to prevent a deformation of a waveform of a current flowing through a single-phase AC power supply due to a current from a parasitic capacitance or an eddy current from a motor. CONSTITUTION: A motor driving apparatus includes a rectifier circuit(8) having an input coupled with a single-phase AC(Alternating Current) power supply(1), an inverter circuit(4), and an inverter controller(5b). The inverter circuit is coupled with the rectifier circuit, and outputs a current and a voltage to a motor. The inverter controller controls the inverter circuit so as to drive the motor. The inverter controller further includes a power supply voltage estimator. The power supply voltage estimator estimates a voltage of the single-phase AC power supply, and changes the value of the current or voltage output from the inverter circuit based on the power supply voltage estimated by the power supply voltage estimation unit.