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

Claim 16:
17. The air conditioner according to claim 16, wherein
the connection switching unit sets the connection state 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 applies a voltage so that a current flows in order in only a first direction from the first line and the second line to the third line, in only a second direction from the second line and the third line to the first line, and in only a third direction from the first line and the third line to the second 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 so that the current flows in only the first direction,
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 so that the current flows in only the second direction, 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 so that the current flows in only the third direction, 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.