Patent ID: 7550936
Filing Date: 2009-06-23
Classification: G06F,H02P,H05K

Abstract:
1. A fan motor drive control apparatus comprising: a plurality of drive circuits for driving a plurality of fan motors which are used simultaneously to obtain a predetermined air volume; and a speed change-over control circuit for transmitting a control signal for changing over speeds of the fan motors, to the plurality of the drive circuits, wherein each of the drive circuits for driving the fan motors respectively comprises a stopping detection terminal for detecting constraint stopping of a corresponding fan motor, and wherein the speed change-over control circuit receives a signal, as an input, transmitted from the stopping detection terminal of the drive circuit which is connected to a stopped fan motor, and transmits the control signal in accordance with the signal received from the stopping detection terminal to another drive circuit, which is also used for obtaining the predetermined air volume, to increase a speed of the fan motor which is connected to the another drive circuit for ensuring the predetermined air volume.