公开(公告)号：US20140062372A1

公开(公告)日：2014-03-06

申请号：US13664444

申请日：2012-10-31

申请人： CHIH-YUAN HSU ,  MING-YU LIAO

发明人： CHIH-YUAN HSU ,  MING-YU LIAO

IPC分类号： H02P7/18

CPC分类号： F04D27/004

摘要： A fan speed control circuit is provided. The circuit includes a control chip. The control chip stores a relationship table recording a number of duty cycle intervals and a number of rotational speeds of a fan. Each duty cycle interval corresponds to one rotational speed of the fan. The control chip obtains a preset number of PWM signals outputted by a processing chip; determines the average value according to the duty cycle of the obtained preset number of PWM signals; determines which duty cycle interval the average value is in, according to the relationship table; determines the rotational speed of the fan corresponding to the determined duty cycle interval according to the relationship table; and controls the fan to rotate according to the determined rotational speed.

摘要翻译： 提供风扇速度控制电路。 该电路包括一个控制芯片。 控制芯片存储记录多个占空比间隔和风扇的转速的关系表。 每个占空比间隔对应于风扇的一个转速。 控制芯片获得由处理芯片输出的预设数量的PWM信号; 根据获得的预设数量的PWM信号的占空比确定平均值; 根据关系表确定平均值在哪个占空比间隔; 根据关系表确定对应于确定的占空比间隔的风扇的转速; 并根据所确定的旋转速度控制风扇旋转。

公开(公告)号：US08803464B2

公开(公告)日：2014-08-12

申请号：US13664444

申请日：2012-10-31

申请人： Chih-Yuan Hsu ,  Ming-Yu Liao

发明人： Chih-Yuan Hsu ,  Ming-Yu Liao

IPC分类号： G05D23/00

CPC分类号： F04D27/004

摘要： A fan speed control circuit is provided. The circuit includes a control chip. The control chip stores a relationship table recording a number of duty cycle intervals and a number of rotational speeds of a fan. Each duty cycle interval corresponds to one rotational speed of the fan. The control chip obtains a preset number of PWM signals outputted by a processing chip; determines the average value according to the duty cycle of the obtained preset number of PWM signals; determines which duty cycle interval the average value is in, according to the relationship table; determines the rotational speed of the fan corresponding to the determined duty cycle interval according to the relationship table; and controls the fan to rotate according to the determined rotational speed.

摘要翻译： 提供风扇速度控制电路。 该电路包括一个控制芯片。 控制芯片存储记录多个占空比间隔和风扇的转速的关系表。 每个占空比间隔对应于风扇的一个转速。 控制芯片获得由处理芯片输出的预设数量的PWM信号; 根据获得的预设数量的PWM信号的占空比确定平均值; 根据关系表确定平均值在哪个占空比间隔; 根据关系表确定对应于确定的占空比间隔的风扇的转速; 并根据所确定的旋转速度控制风扇旋转。

公开(公告)号：US20110018344A1

公开(公告)日：2011-01-27

申请号：US12613666

申请日：2009-11-06

申请人： Ming-Yu Liao ,  Yu-Chu Chou ,  Hsiao-Chi Cho

发明人： Ming-Yu Liao ,  Yu-Chu Chou ,  Hsiao-Chi Cho

IPC分类号： H02J1/00

CPC分类号： G06F1/266 ,  G06F1/28 ,  Y10T307/406

摘要： An electronic device assigns power to USB ports dynamically. A total current detection circuit transmits driving voltage signals to the USB ports, and detects whether a total current provided to the USB ports exceeds a rated total current and output a total current detection signal. A plurality of short-circuit detection circuits detects whether USB devices connected to the corresponding USB ports are shorted and to output a short-circuit detection signal. A plurality of relay circuits switch connection between the USB ports and the power circuit. A USB controller outputs a control signal according to the total current detection signal and the short-circuit detection signal and directs the relay circuits to switch connection between the corresponding USB ports and the power circuit on and off.

摘要翻译： 电子设备动态地为USB端口分配电源。 总电流检测电路将驱动电压信号发送到USB端口，并且检测提供给USB端口的总电流是否超过额定总电流并输出总电流检测信号。 多个短路检测电路检测连接到相应的USB端口的USB设备是否短路并输出短路检测信号。 多个继电器电路在USB端口和电源电路之间切换连接。 USB控制器根据总电流检测信号和短路检测信号输出控制信号，并指示继电器电路切换对应的USB端口和电源电路的接通和断开。

公开(公告)号：US08218279B2

公开(公告)日：2012-07-10

申请号：US12613666

申请日：2009-11-06

申请人： Ming-Yu Liao ,  Yu-Chu Chou ,  Hsiao-Chi Cho

发明人： Ming-Yu Liao ,  Yu-Chu Chou ,  Hsiao-Chi Cho

IPC分类号： H02H3/08

CPC分类号： G06F1/266 ,  G06F1/28 ,  Y10T307/406

摘要： An electronic device assigns power to USB ports dynamically. A total current detection circuit transmits driving voltage signals to the USB ports, and detects whether a total current provided to the USB ports exceeds a rated total current and output a total current detection signal. A plurality of short-circuit detection circuits detects whether USB devices connected to the corresponding USB ports are shorted and to output a short-circuit detection signal. A plurality of relay circuits switch connection between the USB ports and the power circuit. A USB controller outputs a control signal according to the total current detection signal and the short-circuit detection signal and directs the relay circuits to switch connection between the corresponding USB ports and the power circuit on and off.

摘要翻译： 电子设备动态地为USB端口分配电源。 总电流检测电路将驱动电压信号发送到USB端口，并且检测提供给USB端口的总电流是否超过额定总电流并输出总电流检测信号。 多个短路检测电路检测连接到相应的USB端口的USB设备是否短路并输出短路检测信号。 多个继电器电路在USB端口和电源电路之间切换连接。 USB控制器根据总电流检测信号和短路检测信号输出控制信号，并指示继电器电路切换对应的USB端口和电源电路的接通和断开。