US 11,953,222 B2
Fan motor of air conditioner and operating method thereof
Daehyoung Kim, Seoul (KR); Donghwi Kim, Seoul (KR); and Jaehwa Jung, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/293,249
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Oct. 25, 2019, PCT No. PCT/KR2019/014215
§ 371(c)(1), (2) Date May 12, 2021,
PCT Pub. No. WO2020/101217, PCT Pub. Date May 22, 2020.
Claims priority of application No. 10-2018-0142044 (KR), filed on Nov. 16, 2018.
Prior Publication US 2021/0404689 A1, Dec. 30, 2021
Int. Cl. F24F 11/64 (2018.01); F24F 11/77 (2018.01); F24F 110/40 (2018.01)
CPC F24F 11/64 (2018.01) [F24F 11/77 (2018.01); F24F 2110/40 (2018.01)] 11 Claims
OG exemplary drawing
 
1. An air conditioner comprising:
a fan motor to drive a rotation of a fan;
a driving circuit to convert power, which is supplied by a power supply, into a motor driving voltage depending on a duty value and to provide the motor driving voltage to the fan motor;
a current detector to detect a current input into the fan motor;
a memory that stores information identifying a static pressure and an air volume corresponding to the duty value and the current value; and
a motor controller configured to identify the duty value to the driving circuit based on a target revolutions per minute (RPM) for the fan motor,
wherein the motor controller is configured to perform a system resistance calculating operation that includes:
acquiring the static pressure and the air volume from the memory based on the duty value identified to the driving circuit and the current detected by the current detector, and
calculating a setting RPM for the fan motor based on the target RPM, the static pressure, and the air volume.