US 12,326,146 B2
Apparatus for controlling compressor, compressor and method for controlling compressor
Youngsung Kim, Seoul (KR); Youngbong Cho, Seoul (KR); Jaeheung Kim, Seoul (KR); and Hyeongseok Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Apr. 15, 2022, as Appl. No. 17/721,736.
Claims priority of application No. 10-2021-0077643 (KR), filed on Jun. 15, 2021.
Prior Publication US 2022/0397112 A1, Dec. 15, 2022
Int. Cl. F04B 49/20 (2006.01); F04B 49/06 (2006.01)
CPC F04B 49/20 (2013.01) [F04B 49/06 (2013.01); F04B 2201/0201 (2013.01); F04B 2203/0208 (2013.01); F04B 2205/03 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A compressor control apparatus configured to control operation of a compressor, the compressor including a cylinder, a piston configured to reciprocate in the cylinder, and a motor configured to move the piston, the compressor control apparatus comprising:
an inverter configured to convert power received from an external power source into driving power for driving the motor of the compressor; and
a controller configured to:
detect at least one of a magnitude of the driving power, a position of the piston of the compressor, or an internal pressure of the cylinder of the compressor,
generate a pulse width modulation (PWM) control signal for controlling a switching operation of the inverter based on a result of detecting at least one of the magnitude of the driving power, the position of the piston of the compressor, or the internal pressure of the cylinder of the compressor,
apply a compensation value to a duty ratio of the PWM control signal, the compensation value being varied based on the compressor performing a compression stroke or a suction stroke, and
apply the PWM control signal to the inverter to control the switching operation of the inverter,
wherein the controller is configured to:
decrease the compensation value during a first period of the suction stroke,
apply a first compensation value to the duty ratio during a first period of the compression stroke, and
apply a second compensation value to the duty ratio during the first period of the suction stroke, the second compensation value being different from the first compensation value.