公开(公告)号：US08964415B2

公开(公告)日：2015-02-24

申请号：US13610790

申请日：2012-09-11

申请人： Yajiang Zhu ,  Na Liu ,  Siyuan Xu

发明人： Yajiang Zhu ,  Na Liu ,  Siyuan Xu

IPC分类号： H02M3/335

CPC分类号： H02M1/4258 ,  Y02B70/126

摘要： A switching mode power supply (SMPS) includes a rectifying device configured for converting a periodically varying input AC (alternating current) voltage into a DC (direct current) voltage, and a transformer including a primary winding, a secondary winding, and an auxiliary winding. The primary winding is coupled to the rectifying device. An input capacitor is coupled to the rectifying device and the primary winding of the transformer. A first power switch is coupled to the input capacitor. A control circuit is coupled to the first power switch and is configured to control the first power switch based on a phase or amplitude of the input AC voltage. By controlling the charging and discharging of the input capacitor, power is provided to the primary winding during a longer portion of the AC input voltage cycle, allowing the rectifier device to have a larger conduction angle to increase a power factor (PF).

摘要翻译： 开关模式电源（SMPS）包括被配置为将周期性变化的输入AC（交流）电压转换为DC（直流）电压的整流装置，以及包括初级绕组，次级绕组和辅助绕组 。 初级绕组耦合到整流装置。 输入电容器耦合到整流装置和变压器的初级绕组。 第一电源开关耦合到输入电容器。 控制电路耦合到第一电源开关，并且被配置为基于输入AC电压的相位或幅度来控制第一功率开关。 通过控制输入电容器的充电和放电，在交流输入电压周期的较长部分期间向初级绕组提供功率，允许整流器件具有较大的导通角以增加功率因数（PF）。

公开(公告)号：US20130343095A1

公开(公告)日：2013-12-26

申请号：US13610790

申请日：2012-09-11

申请人： YAJIANG ZHU ,  Na Liu ,  Siyuan Xu

发明人： YAJIANG ZHU ,  Na Liu ,  Siyuan Xu

IPC分类号： H02M3/335 ,  H02M3/22

CPC分类号： H02M1/4258 ,  Y02B70/126

摘要： A switching mode power supply (SMPS) includes a rectifying device configured for converting a periodically varying input AC (alternating current) voltage into a DC (direct current) voltage, and a transformer including a primary winding, a secondary winding, and an auxiliary winding. The primary winding is coupled to the rectifying device. An input capacitor is coupled to the rectifying device and the primary winding of the transformer. A first power switch is coupled to the input capacitor. A control circuit is coupled to the first power switch and is configured to control the first power switch based on a phase or amplitude of the input AC voltage. By controlling the charging and discharging of the input capacitor, power is provided to the primary winding during a longer portion of the AC input voltage cycle, allowing the rectifier device to have a larger conduction angle to increase a power factor (PF).

摘要翻译： 开关模式电源（SMPS）包括被配置为将周期性变化的输入AC（交流）电压转换为DC（直流）电压的整流装置，以及包括初级绕组，次级绕组和辅助绕组 。 初级绕组耦合到整流装置。 输入电容器耦合到整流装置和变压器的初级绕组。 第一电源开关耦合到输入电容器。 控制电路耦合到第一电源开关，并且被配置为基于输入AC电压的相位或幅度来控制第一功率开关。 通过控制输入电容器的充电和放电，在交流输入电压周期的较长部分期间向初级绕组提供功率，允许整流器件具有较大的导通角以增加功率因数（PF）。

公开(公告)号：US08923021B2

公开(公告)日：2014-12-30

申请号：US13338857

申请日：2011-12-28

申请人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

发明人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

IPC分类号： H02M3/335

CPC分类号： H02M1/36 ,  H02M3/33507 ,  H02M2001/0025

摘要： A switch-mode power supply (SMPS) includes a transformer having a primary winding coupled to a power switch, a secondary winding for providing an output of the power supply, and a controller. The controller includes a first input terminal for receiving a current sensing signal related to a current in the primary winding, a second input terminal for receiving a feedback signal related to a current in the secondary winding, and an output terminal for providing a control signal to turn on and off the power switch. When the feedback signal is higher than a first reference voltage, the controller is configured to cause the SMPS to maintain a constant output current at a first current magnitude. When the feedback signal is lower than the first reference voltage, the controller is configured to cause the SMPS to provide a second output current at a second current magnitude higher than the first current magnitude.

摘要翻译： 开关电源（SMPS）包括具有耦合到功率开关的初级绕组的变压器，用于提供电源的输出的次级绕组和控制器。 该控制器包括用于接收与初级绕组中的电流相关的电流感测信号的第一输入端子，用于接收与次级绕组中的电流有关的反馈信号的第二输入端，以及用于向第二输入端提供控制信号 打开和关闭电源开关。 当反馈信号高于第一参考电压时，控制器被配置为使得SMPS在第一电流幅度下保持恒定的输出电流。 当反馈信号低于第一参考电压时，控制器被配置为使得SMPS以比第一电流幅度高的第二电流幅度提供第二输出电流。

公开(公告)号：US20130148387A1

公开(公告)日：2013-06-13

申请号：US13338857

申请日：2011-12-28

申请人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

发明人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

IPC分类号： H02M3/335

CPC分类号： H02M1/36 ,  H02M3/33507 ,  H02M2001/0025

摘要： A switch-mode power supply (SMPS) includes a transformer having a primary winding coupled to a power switch, a secondary winding for providing an output of the power supply, and a controller. The controller includes a first input terminal for receiving a current sensing signal related to a current in the primary winding, a second input terminal for receiving a feedback signal related to a current in the secondary winding, and an output terminal for providing a control signal to turn on and off the power switch. When the feedback signal is higher than a first reference voltage, the controller is configured to cause the SMPS to maintain a constant output current at a first current magnitude. When the feedback signal is lower than the first reference voltage, the controller is configured to cause the SMPS to provide a second output current at a second current magnitude higher than the first current magnitude.

摘要翻译： 开关电源（SMPS）包括具有耦合到功率开关的初级绕组的变压器，用于提供电源的输出的次级绕组和控制器。 该控制器包括用于接收与初级绕组中的电流相关的电流感测信号的第一输入端子，用于接收与次级绕组中的电流有关的反馈信号的第二输入端，以及用于向第二输入端提供控制信号 打开和关闭电源开关。 当反馈信号高于第一参考电压时，控制器被配置为使得SMPS在第一电流幅度下保持恒定的输出电流。 当反馈信号低于第一参考电压时，控制器被配置为使得SMPS以比第一电流幅度高的第二电流幅度提供第二输出电流。