公开(公告)号：US20050285583A1

公开(公告)日：2005-12-29

申请号：US11165939

申请日：2005-06-24

Applicant: Toshi Takahashi ,  Yong Li

Inventor： Toshi Takahashi ,  Yong Li

IPC: G05F1/40 ,  H02M1/42

CPC classification number: H02M1/4225 ,  Y02B70/126

Abstract: A circuit for providing power factor correction comprising a boost converter circuit having a boost inductance and a power factor correction switch coupled in series with the boost inductance, the boost inductance and power factor correction switch being coupled across the output of a rectifier being supplied with AC power from an AC line, the boost converter circuit further comprising a boost diode coupled to a junction between the inductor and the switch, an output of the boost diode coupled to an output capacitor, a DC bus voltage being provided across the output capacitor, further comprising a control circuit receiving as inputs a rectified AC input voltage from the rectifier, a signal proportional to current through the inductor and the DC bus voltage across the capacitor, and wherein the control circuit provides a pulse width modulated signal to control the on time of the PFC switch, further comprising an enable/disable circuit receiving as inputs the rectified AC input voltage and the DC bus voltage, the circuit instantaneously comparing the rectified AC input voltage and the DC bus voltage and controlling the control circuit whereby the control circuit provides the pulse width modulated signal to control the PFC switch when the rectified AC input voltage is less than the DC bus voltage and disables the generation of the pulse width modulated signal to the PFC switch when the rectified AC input voltage is greater than DC bus voltage.

Abstract translation: 一种用于提供功率因数校正的电路，包括具有升压电感的升压转换器电路和与升压电感串联耦合的功率因数校正开关，所述升压电感和功率因数校正开关耦合在整流器的输出端，所述整流器的输出端被提供有AC 所述升压转换器电路还包括耦合到所述电感器和所述开关之间的连接点的升压二极管，所述升压二极管的耦合到输出电容器的输出，跨所述输出电容器提供的直流总线电压，进一步 包括控制电路，其接收来自整流器的整流的AC输入电压作为输入，与通过电感器的电流成比例的信号和跨过电容器的DC总线电压，并且其中控制电路提供脉宽调制信号以控制 所述PFC开关还包括使能/禁止电路作为输入端接收整流的AC输入电压a 直流母线电压，电路瞬时比较整流的交流输入电压和直流母线电压，并控制控制电路，由此控制电路提供脉宽调制信号，以便在整流的交流输入电压小于 DC总线电压，当整流的交流输入电压大于直流母线电压时，禁止向PFC开关产生脉宽调制信号。

公开(公告)号：US07088081B2

公开(公告)日：2006-08-08

申请号：US11165939

申请日：2005-06-24

Applicant: Toshi Takahashi ,  Yong Li

Inventor： Toshi Takahashi ,  Yong Li

IPC: G05F1/56

CPC classification number: H02M1/4225 ,  Y02B70/126

Abstract: A circuit for providing power factor correction comprising a boost converter circuit having a boost inductance and a power factor correction switch coupled in series with the boost inductance, the boost inductance and power factor correction switch being coupled across the output of a rectifier being supplied with AC power from an AC line, the boost converter circuit further comprising a boost diode coupled to a junction between the inductor and the switch, an output of the boost diode coupled to an output capacitor, a DC bus voltage being provided across the output capacitor, further comprising a control circuit receiving as inputs a rectified AC input voltage from the rectifier, a signal proportional to current through the inductor and the DC bus voltage across the capacitor, and wherein the control circuit provides a pulse width modulated signal to control the on time of the PFC switch, further comprising an enable/disable circuit receiving as inputs the rectified AC input voltage and the DC bus voltage, the circuit instantaneously comparing the rectified AC input voltage and the DC bus voltage and controlling the control circuit whereby the control circuit provides the pulse width modulated signal to control the PFC switch when the rectified AC input voltage is less than the DC bus voltage and disables the generation of the pulse width modulated signal to the PFC switch when the rectified AC input voltage is greater than DC bus voltage.

Abstract translation: 一种用于提供功率因数校正的电路，包括具有升压电感的升压转换器电路和与升压电感串联耦合的功率因数校正开关，所述升压电感和功率因数校正开关耦合在整流器的输出端，所述整流器的输出端被提供有AC 所述升压转换器电路还包括耦合到所述电感器和所述开关之间的连接点的升压二极管，所述升压二极管的耦合到输出电容器的输出，跨所述输出电容器提供的直流总线电压，进一步 包括控制电路，其接收来自整流器的整流的AC输入电压作为输入，与通过电感器的电流成比例的信号和跨过电容器的DC总线电压，并且其中控制电路提供脉宽调制信号以控制 所述PFC开关还包括使能/禁止电路作为输入端接收整流的AC输入电压a 直流母线电压，电路瞬时比较整流的交流输入电压和直流母线电压，并控制控制电路，由此控制电路提供脉宽调制信号，以便在整流的交流输入电压小于 DC总线电压，当整流的交流输入电压大于直流母线电压时，禁止向PFC开关产生脉宽调制信号。