Patent ID: 11953222
Assignee: LG ELECTRONICS INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
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.