Patent ID: 9739515
Date: 2017-08-22
CPC Classifications: F04C,F25B,H02M,Y02B

Claim:
1. A heat pump device comprising: a compressor unit including a compressor that compresses a refrigerant and a motor that drives the compressor; an inverter that is electrically connected to the motor and applies a voltage to the motor for driving the motor; a converter that applies a voltage to the inverter; an inverter control unit that generates a driving signal for driving the inverter, the inverter control including: a converter control unit that includes a bus-voltage-command-value estimating unit, a bus-voltage control unit, and a second driving-signal generating unit and generates a driving signal for driving the converter on the basis of a signal received from the inverter control unit and a signal received from a bus-voltage detecting unit and outputs the driving signal to the converter, wherein the inverter control unit includes a heating operation mode in which a heating operation of the compressor is performed by applying a high-frequency alternating-current voltage to the motor, the heating-operation-mode control unit controls the first driving-signal generating unit causing the first driving-signal generating unit to output, as inverter driving signals, PWM signals for heating the compressor without rotationally driving the motor by feeding a high-frequency current to the motor that the motor cannot follow, and the converter control unit changes, in the heating operation mode of the inverter control unit, a voltage applied to the inverter according to a voltage applied to the motor.