US 12,352,273 B2
Motor driving apparatus and air conditioner including the same
Yonghwa Lee, Seoul (KR); Sanghyeon Kim, Seoul (KR); and Jeongeon Oh, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Jan. 7, 2022, as Appl. No. 17/570,910.
Claims priority of application No. 10-2021-0002688 (KR), filed on Jan. 8, 2021.
Prior Publication US 2022/0220966 A1, Jul. 14, 2022
Int. Cl. F04D 25/06 (2006.01); H02M 1/08 (2006.01); H02M 3/158 (2006.01)
CPC F04D 25/0666 (2013.01) [F04D 25/0693 (2013.01); H02M 1/08 (2013.01); H02M 3/158 (2013.01); F25B 2600/021 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A motor driving apparatus, comprising:
an inverter that includes a plurality of switching elements, and is configured to output alternating current (AC) power to a motor based on a switching operation;
a switching device disposed between the inverter and the motor, and configured to switch windings of the motor to a first connection or a second connection; and
a controller configured to control the inverter and the switching device,
wherein the first connection corresponds to Y-connection, and the second connection corresponds to delta connection or A-connection, and
wherein the controller is configured to, (i) based on the windings of the motor being switched from the first connection to the second connection, control an operating frequency of the motor to be less than or equal to a first frequency, and (ii) based on the windings of the motor being switched from the second connection to the first connection, control the operating frequency of the motor to be less than or equal to a second frequency which is less than the first frequency.