Patent ID: 9651289
Date: 2017-05-16
CPC Classifications: F25B,H02M,H02P,Y02B

Claim:
1. A heat pump device comprising: a compressor having a compression mechanism that compresses a refrigerant; a motor that includes a rotor and operates the compression mechanism provided in the compressor; an inverter that applies a voltage to the motor; and an inverter control unit that controls the inverter, wherein the inverter control unit includes a phase switching unit that alternately switches between two fixed phases and respectively outputs one of the fixed phases as a fixed phase, an addition unit that changes a value n, which is an integer equal to or larger than 0, for every predetermined time, and outputs a phase θ a voltage generation unit that, when the compressor is stopped and when the rotor is correspondingly stopped, generates a voltage command value based on the phase θ a drive-signal generation unit that, based on an output from the voltage generation unit, generates drive signals corresponding to respective switching elements of the inverter, outputs respective generated drive signals to the corresponding switching elements of the inverter, and generates a high-frequency AC voltage in the inverter.