Patent ID: 11923797
Assignee: LG ELECTRONICS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 14:
15. A motor device comprising:
An inverter that includes a plurality of switching devices and is configured to output AC power to a motor based on a switching operation;
a switching device that is disposed between the inverter and the motor, and configured to switch windings of the motor to a first connection state or a second connection state;
an output current detection unit configured to detect an output current of the motor;
a controller configured to control the inverter and the switching device,
wherein the controller is configured to, based on a number of low-speed abnormal operations exceeding a first threshold value within a time period, maintain the second connection state,
wherein the controller is configured to determine the number of low-speed abnormal operations in which the motor is operated at an operation frequency that is equal to or lower than a limit frequency,
wherein at the limit frequency, the output current in the first connection state is smaller than the output current in the second connection state.