Patent ID: 11940194
Assignee: LG ELECTRONICS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H  Y | IPC F  H

Claim 14:
15. An air conditioner comprising:
a first motor;
a second motor; and
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 the 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 the 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.