Refrigeration cycle device

A refrigeration cycle device comprising:

• a refrigeration cycle circuit including a compressor, a condenser, an expansion valve and an evaporator, and allowing circulation of a working medium;
• and
• a control device configured to control the compressor of the refrigeration cycle circuit,
• the working medium containing ethylene-based fluoroolefin as a refrigerant component,
• the compressor including
• a sealed container constituting a fluidic pathway for the working medium,
• a compression mechanism positioned inside the sealed container to compress the working medium, and
• an electric motor positioned inside the sealed container to operate the compression mechanism,
• the control device including
• a drive circuit configured to drive the electric motor, and
• a control circuit configured to control the drive circuit,
• the drive circuit including
• a converter circuit including a plurality of output points including a first output point for outputting a first voltage, a second output point for outputting a second voltage lower than the first voltage, and one or more third output points for outputting a third voltage between the first voltage and the second voltage, and
• an inverter circuit including a plurality of semiconductor switching element groups including a first semiconductor switching element group connected between the first output point and the electric motor, a second semiconductor switching element group connected between the second output point and the electric motor, and one or more third semiconductor switching element groups individually connected between the one or more third output points and the electric motor,
• the converter circuit being disposed between a power supply and the inverter circuit, the inverter circuit being disposed between the converter circuit and the electric motor, the converter circuit being configured to convert a first alternating current power to a direct current power, and the inverter circuit being configured to supply a second alternating current power to the electric motor based on the direct current power, and
• the control circuit being configured to perform PWM control on the plurality of semiconductor switching element groups of the inverter circuit of the drive circuit to allow the drive circuit to operate the electric motor.