Patent ID: 9695832
Date: 2017-07-04
CPC Classifications: F04D,H02K,H02P,Y02B

Claim:
1. An integrated circuit for controlling operation of a motor of a fan assembly, wherein the fan assembly comprises a housing and a fan, wherein the motor is in the housing, and wherein the motor is configured to rotate the fan, the integrated circuit comprising: a detection module separate from the fan assembly, wherein the detection module is configured to, without receiving a signal from a sensor, detect (i) a voltage induced in a first coil of the motor, wherein the first coil is an undriven coil; and a first control module configured to (i) receive a control signal from a second control module, and (ii) control the operation of the motor of the fan assembly to control a speed of the fan based on (a) the control signal, and (b) the voltage induced in the first coil of the motor, wherein the second control module is separate from the integrated circuit, wherein the first control module is further configured to