US 11,705,832 B2
Device for driving a plurality of motors and electric apparatus including the same
Sunku Kwon, Seoul (KR); Chaseung Jun, Seoul (KR); Sehwa Choe, Seoul (KR); and Wookjin Lee, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on May 13, 2022, as Appl. No. 17/744,303.
Application 17/744,303 is a continuation of application No. 16/988,329, filed on Aug. 7, 2020, granted, now 11,362,601.
Claims priority of application No. 10-2019-0096971 (KR), filed on Aug. 8, 2019; and application No. 10-2019-0096972 (KR), filed on Aug. 8, 2019.
Prior Publication US 2022/0271690 A1, Aug. 25, 2022
Int. Cl. H02P 8/00 (2006.01); H02P 5/50 (2016.01); H02P 21/22 (2016.01)
CPC H02P 5/50 (2013.01) [H02P 21/22 (2016.02); H02P 2201/03 (2013.01); H02P 2209/01 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A device for driving a plurality of motors, the device comprising:
an inverter connected to a direct current (DC) terminal;
a multi-phase motor connected to the inverter;
a single-phase motor connected to the multi-phase motor; and
a first capacitor and a second capacitor that are connected between both ends of the DC terminal,
wherein a neutral point of the multi-phase motor is connected to a first end of the single-phase motor, and a second end of the single-phase motor is connected to a node between the first capacitor and the second capacitor, and
wherein, by equalizing a neutral point voltage of the multi-phase motor and a DC terminal neutral point voltage between the first capacitor and the second capacitor, only the multi-phase motor is driven among the multi-phase motor and the single-phase motor, current flows through the multi-phase motor, and current does not flow through the single-phase motor.