公开(公告)号：US09903381B2

公开(公告)日：2018-02-27

申请号：US14991709

申请日：2016-01-08

Applicant: DELTA ELECTRONICS, INC.

Inventor： Cheng-Chieh Liu ,  Chin-Ping Su ,  Te-Sheng Su ,  Wen-Chih Wang

IPC: H02P6/30 ,  F04D27/00 ,  F04D19/00 ,  F04D25/08

CPC classification number: F04D27/004 ,  F04D19/005 ,  F04D25/08 ,  H02P6/30

Abstract: A control system includes a motor, an interface circuit, a motor controller and a detection control circuit. The interface circuit receives and converts a pulse width modulation signal. The fan dissipates heat when the motor is operated in a forward rotation mode and eliminates dust when the motor is operated in a reverse rotation mode. The detection control circuit reads a duty cycle of the converted pulse width modulation signal in real time. When the motor is operated in the forward rotation mode, the detection control circuit drives the motor controller to control the rotation speed of the fan according to the duty cycle. If the duty cycle is lower than or equal to a first threshold value, the detection control circuit drives the motor controller to switch operation mode of the motor from the forward rotation mode to the reverse rotation mode.

公开(公告)号：US20160238014A1

公开(公告)日：2016-08-18

申请号：US14991709

申请日：2016-01-08

Applicant: DELTA ELECTRONICS, INC.

Inventor： Cheng-Chieh Liu ,  Chin-Ping Su ,  Te-Sheng Su ,  Wen-Chih Wang

IPC: F04D27/00 ,  F04D25/06 ,  F04D19/00

CPC classification number: F04D27/004 ,  F04D19/005 ,  F04D25/08 ,  H02P6/30

Abstract: A control system includes a motor, an interface circuit, a motor controller and a detection control circuit. The interface circuit receives and converts a pulse width modulation signal. The fan dissipates heat when the motor is operated in a forward rotation mode and eliminates dust when the motor is operated in a reverse rotation mode. The detection control circuit reads a duty cycle of the converted pulse width modulation signal in real time. When the motor is operated in the forward rotation mode, the detection control circuit drives the motor controller to control the rotation speed of the fan according to the duty cycle. If the duty cycle is lower than or equal to a first threshold value, the detection control circuit drives the motor controller to switch operation mode of the motor from the forward rotation mode to the reverse rotation mode.

Abstract translation: 控制系统包括电动机，接口电路，电动机控制器和检测控制电路。 接口电路接收并转换脉宽调制信号。 当电机以正向旋转模式运行时，风扇散热，并且当电机以反向旋转模式运行时，风扇消除灰尘。 检测控制电路实时读取转换后的脉宽调制信号的占空比。 当电机以正转模式运转时，检测控制电路驱动电动机控制器根据占空比来控制风扇的转速。 如果占空比低于或等于第一阈值，则检测控制电路驱动电动机控制器将电动机的运行模式从正转模式切换到反转模式。