Heat pump apparatus, heat pump system and inverter control method

摘要

The purpose of the present invention is to keep a heating rate constant, irrespective of manufacturing and environmental irregularities, when heating a compressor while compression driving is stopped. An inverter control unit (10) causes an inverter to generate high-frequency alternating current voltage having an off-section of zero voltage between a section where a voltage applied from the inverter to a motor is positive and a section where the voltage is negative. Here, the inverter control unit (10) detects a value of a current flowing at the inverter at a detection section which is between immediately before a start of the off-section and immediately after an end of the off-section, and causes the inverter to generate high-frequency alternating current voltage adjusted in response to the detected current value.