Patent ID: 7973501
Filing Date: 2011-07-05
Classification: H02P

Abstract:
1. A fan system, comprising: a control device comprising a first node; a rotation speed signal generation circuit electrically connected to the first node for generating a rotation speed control signal; and a rotation speed reading circuit electrically connected to the first node for receiving a motor rotation speed signal as well as obtaining an actual rotation speed value of a motor; and a fan device, comprising a second node electrically connected to the first node and forming a transmission route with the first node; a signal transforming circuit electrically connected to the second node for transforming the rotation speed control signal received form the transmission route into a speed control voltage as an output; and a motor driving circuit electrically connected to the second node and the signal transforming circuit for receiving the speed control voltage so as to generating the motor rotation speed signal based on the speed control voltage and transmitting the motor rotation speed signal via the transmission route.