公开(公告)号：US20050002657A1

公开(公告)日：2005-01-06

申请号：US10839818

申请日：2004-05-06

申请人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

发明人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

IPC分类号： H02P7/29

CPC分类号： H02P7/29

摘要： A fan speed control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a phase compensation unit. The PWM signal generating circuit generates a PWM control signal with a sequence of alternating on-time and off-time, and the driving circuit outputs a driving signal according to the PWM control signal to a fan motor. The phase compensation unit is connected to the fan motor for delaying or advancing the PWM control signal by a phase angle to synchronize the acting period of the back electromotive force formed by the magnetic flux variation with the off-time of the PWM control signal.

摘要翻译： 风扇速度控制电路包括脉宽调制（PWM）信号发生电路，驱动电路和相位补偿单元。 PWM信号发生电路产生具有交替导通时间和关断时间的序列的PWM控制信号，并且驱动电路根据PWM控制信号向风扇电动机输出驱动信号。 相位补偿单元连接到风扇电动机，用于使PWM控制信号延迟或前进相位角，以使由磁通量变化形成的反电动势的动作周期与PWM控制信号的关闭时间同步。

公开(公告)号：US07567749B2

公开(公告)日：2009-07-28

申请号：US11703183

申请日：2007-02-07

申请人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

发明人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

IPC分类号： H02P7/29

CPC分类号： H02P29/50

摘要： A motor control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a waveform-shaping circuit connected between the PWM signal generating circuit and the driving circuit. The PWM signal generating circuit generates a square wave with a sequence of alternating on-time and off-time. The waveform-shaping circuit adjusts the rise-time and the fall-time of the square wave to be both within a range of 5% to 15% of the square wave period, and the driving circuit outputs a driving signal to a fan motor according to the adjusted square wave.

摘要翻译： 电动机控制电路包括连接在PWM信号发生电路和驱动电路之间的脉宽调制（PWM）信号发生电路，驱动电路和波形整形电路。 PWM信号发生电路产生具有交替导通时间和关断时间的序列的方波。 波形整形电路将方波的上升时间和下降时间均调整在方波周期的5％〜15％的范围内，驱动电路根据 到调整后的方波。

公开(公告)号：US07242857B2

公开(公告)日：2007-07-10

申请号：US10895902

申请日：2004-07-22

申请人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

发明人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

IPC分类号： H02P5/28 ,  H02P1/18 ,  H02P7/29

CPC分类号： H02P29/50

摘要： A motor control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a waveform-shaping circuit connected between the PWM signal generating circuit and the driving circuit. The PWM signal generating circuit generates a square wave with a sequence of alternating on-time and off-time. The waveform-shaping circuit adjusts the rise-time and the fall-time of the square wave to be both within a range of 5% to 15% of the square wave period, and the driving circuit outputs a driving signal to a fan motor according to the adjusted square wave.

摘要翻译： 电动机控制电路包括连接在PWM信号发生电路和驱动电路之间的脉宽调制（PWM）信号发生电路，驱动电路和波形整形电路。 PWM信号发生电路产生具有交替导通时间和关断时间的序列的方波。 波形整形电路将方波的上升时间和下降时间均调整在方波周期的5％〜15％的范围内，驱动电路根据 到调整后的方波。

公开(公告)号：US07218846B2

公开(公告)日：2007-05-15

申请号：US10839818

申请日：2004-05-06

申请人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

发明人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

IPC分类号： H02P7/29

CPC分类号： H02P7/29

摘要： A fan speed control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a phase compensation unit. The PWM signal generating circuit generates a PWM control signal with a sequence of alternating on-time and off-time, and the driving circuit outputs a driving signal according to the PWM control signal to a fan motor. The phase compensation unit is connected to the fan motor for delaying or advancing the PWM control signal by a phase angle to synchronize the acting period of the back electromotive force formed by the magnetic flux variation with the off-time of the PWM control signal.

摘要翻译： 风扇速度控制电路包括脉宽调制（PWM）信号发生电路，驱动电路和相位补偿单元。 PWM信号发生电路产生具有交替导通时间和关断时间的序列的PWM控制信号，并且驱动电路根据PWM控制信号向风扇电动机输出驱动信号。 相位补偿单元连接到风扇电动机，用于使PWM控制信号延迟或前进相位角，以使由磁通量变化形成的反电动势的动作周期与PWM控制信号的关闭时间同步。

公开(公告)号：US20070160354A1

公开(公告)日：2007-07-12

申请号：US11703183

申请日：2007-02-07

申请人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

发明人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

IPC分类号： H02P7/29

CPC分类号： H02P29/50

摘要： A motor control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a waveform-shaping circuit connected between the PWM signal generating circuit and the driving circuit. The PWM signal generating circuit generates a square wave with a sequence of alternating on-time and off-time. The waveform-shaping circuit adjusts the rise-time and the fall-time of the square wave to be both within a range of 5% to 15% of the square wave period, and the driving circuit outputs a driving signal to a fan motor according to the adjusted square wave.

公开(公告)号：US20050105897A1

公开(公告)日：2005-05-19

申请号：US10895902

申请日：2004-07-22

申请人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

发明人： Chia-feng Wu ,  Ching-sen Hsieh ,  Yueh-lung Huang ,  Ming-shi Tsai

IPC分类号： H02P7/29 ,  H02P25/04 ,  H02P27/08 ,  H02P29/00 ,  H02P5/28

CPC分类号： H02P29/50

摘要： A motor control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a waveform-shaping circuit connected between the PWM signal generating circuit and the driving circuit. The PWM signal generating circuit generates a square wave with a sequence of alternating on-time and off-time. The waveform-shaping circuit adjusts the rise-time and the fall-time of the square wave to be both within a range of 5% to 15% of the square wave period, and the driving circuit outputs a driving signal to a fan motor according to the adjusted square wave.

摘要翻译： 电动机控制电路包括连接在PWM信号发生电路和驱动电路之间的脉宽调制（PWM）信号发生电路，驱动电路和波形整形电路。 PWM信号发生电路产生具有交替导通时间和关断时间的序列的方波。 波形整形电路将方波的上升时间和下降时间均调整在方波周期的5％〜15％的范围内，驱动电路根据 到调整后的方波。