HEAT PUMP DEVICE, HEAT PUMP SYSTEM, AND METHOD FOR CONTROLLING THREE-PHASE INVERTER

摘要

An object of the present invention is to heat a refrigerant stayed in a compressor efficiently. A voltage-command correction-value computation unit 40 outputs a correction value Kv for correcting a voltage command value V* according to a bus voltage Vdc. A multiplier 41 calculates a voltage command value V*' acquired by correcting the voltage command value V* based on the correction value Kv. A voltage-command generation unit 25 generates and outputs three-phase voltage command values Vu*, Vv* and Vw* based on the corrected voltage command value V*' calculated by the multiplier 41 and a phase ¸. A PWM generation unit 26 generates six drive signals corresponding to switching elements of an inverter 9 based on the three-phase voltage command values Vu*, Vv* and Vw* outputted by the voltage-command generation unit 25 and a carrier signal. The PWM generation unit 26 outputs the generated drive signals to the corresponding switching elements of the three-phase inverter, to cause the inerter to generate a high-frequency AC voltage.