Patent ID: 11863099
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 6:
7. The air conditioner according to claim 1, wherein
the connection switching unit sets the connection states of the coils to another of the first connection state and the second connection state after the current detection circuit detects the first current value, the second current value, and the third current value,
the inverter individually applies a voltage in order to a combination of the first line and the second line, a combination of the second line and the third line, and a combination of the third line and the first line,
the current detection circuit
detects, as a fourth current value, a current value of the current on the input side of the inverter when the inverter applies the voltage to only the first line and the second line,
detects, as a fifth current value, a current value of the current on the input side of the inverter when the inverter applies the voltage to only the second line and the third line, and
detects, as a sixth current value, a current value of the current on the input side of the inverter when the inverter applies the voltage to only the third line and the first line, and
the controller detects the abnormality of the connection switching unit by comparing the fourth current value, the fifth current value, and the sixth current value.