US 11,940,194 B2
Power converting apparatus and air conditioner including the same
Jinho Cho, Seoul (KR); Taeyoung Park, Seoul (KR); and Jongwon Heo, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Feb. 11, 2021, as Appl. No. 17/173,679.
Claims priority of application No. 10-2020-0016546 (KR), filed on Feb. 11, 2020.
Prior Publication US 2021/0247120 A1, Aug. 12, 2021
Int. Cl. F25B 49/02 (2006.01); H02M 1/084 (2006.01); H02M 3/156 (2006.01); H02M 5/458 (2006.01); H02P 5/46 (2006.01); H02P 27/04 (2016.01); H02P 27/08 (2006.01)
CPC F25B 49/025 (2013.01) [F25B 49/022 (2013.01); H02M 1/084 (2013.01); H02M 3/156 (2013.01); H02M 5/458 (2013.01); H02P 5/46 (2013.01); H02P 27/045 (2013.01); H02P 27/08 (2013.01); F25B 2600/021 (2013.01); F25B 2600/024 (2013.01); F25B 2600/11 (2013.01); F25B 2700/151 (2013.01); F25B 2700/171 (2013.01); H02P 2201/03 (2013.01); H02P 2201/07 (2013.01); H02P 2201/11 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power converting apparatus comprising:
a rectifying unit configured to rectify an input AC power;
a buck converter that is configured to step down a voltage of the rectified power and that is configured to output DC power having the step down voltage;
a first inverter that is connected to an output terminal of the buck converter and that is configured to convert the DC power into AC power to drive a first motor;
a second inverter that is connected to the output terminal of the buck converter, that is disposed in parallel to the first inverter, and that is configured to convert the DC power into AC power to drive a second motor; and
a converter controller configured to control an output voltage of the DC power of the buck converter,
wherein the buck converter comprises:
a diode including an anode connected to the rectifying unit,
an inductor connected to a cathode of the diode,
a switching element having a first end connected to the rectifying unit and a second end connected to the inductor and the cathode of the diode, and
a capacitor having (i) a first end connected to the first inverter and the second inverter and (ii) a second end connected to the inductor.