公开(公告)号：WO2013167046A2

公开(公告)日：2013-11-14

申请号：PCT/CN2013079614

申请日：2013-07-18

Applicant: ZTE CORP

Inventor： LI JUNKAI ,  ZHENG DACHENG ,  WAN ZHENGHAI ,  DAI BINCHUAN ,  LI DAN ,  PU XIFENG

IPC: H02M1/42

CPC classification number: H02M1/4233 ,  H02M1/32 ,  Y02B70/126 ,  Y02P80/112

Abstract: Disclosed is an anti-surge bridgeless power factor correction (PFC) circuit, which comprises a bridgeless PFC circuit and a boost capacitor which are connected between an AC power supply and a load in sequence. The anti-surge bridgeless PFC circuit also comprises a protection unit, a switch unit and a control unit. When a surge merges into the input of the AC power supply, the control unit controls the switch unit to be conducted, so as to form return current and discharge surge energy through the protection unit, the boost capacitor and the switch unit, thereby being able to protect a bridgeless PFC circuit from the influence of the surge.

Abstract translation: 公开了一种防浪涌无桥功率因数校正（PFC）电路，其包括连接在AC电源和负载之间的无桥PFC电路和升压电容器。 防浪涌桥接PFC电路还包括保护单元，开关单元和控制单元。 当浪涌合并到交流电源的输入端时，控制单元控制开关单元的导通，以便通过保护单元，升压电容器和开关单元形成返回电流和放电浪涌能量，从而能够 以保护无桥PFC电路免受浪涌的影响。

公开(公告)号：WO2013170841A3

公开(公告)日：2014-01-30

申请号：PCT/CN2013080376

申请日：2013-07-30

Applicant: ZTE CORP

Inventor： LI DAN ,  DAI BINCHUAN ,  ZHENG DACHENG ,  ZHAO JUNBAO ,  PU XIFENG ,  WAN ZHENGHAI ,  LI JUNKAI

IPC: H02M1/42

CPC classification number: H02M1/4233 ,  Y02B70/126 ,  Y02P80/112

Abstract: A surge-proof bridge-free power factor correction (PFC) circuit, comprising: a bridge-free PFC circuit (15), a PFC output filter capacitor, a rectification unit (11), a surge absorption unit (12) and a reverse cutoff unit (13). When a surge occurs, the reverse cutoff unit (13) is in a cutoff state, so that the rectification unit (11) and the surge absorption unit (12) constitute an absorption loop, and the surge energy is absorbed by the surge absorption unit (12). The surge-proof bridge-free PFC circuit also comprises a discharge unit (14) which can release the energy absorbed by the surge absorption unit (12) when the surge occurs, and thus can protect a switch tube and a booster diode of the bridge-free PFC circuit, and can reduce the withstand voltage performance of a PFC output filter capacitor.

Abstract translation: 一种防浪涌无桥功率因数校正（PFC）电路，包括：无桥PFC PFC电路（15），PFC输出滤波电容器，整流单元（11），浪涌吸收单元（12）和反向 切断单元（13）。 当发生浪涌时，反向截止单元（13）处于截止状态，使得整流单元（11）和浪涌吸收单元（12）构成吸收回路，并且浪涌能量被浪涌吸收单元 （12）。 防喘振无桥PFC电路还包括放电单元（14），其可以在浪涌发生时释放由浪涌吸收单元（12）吸收的能量，从而可以保护桥的开关管和升压二极管 的PFC电路，可以降低PFC输出滤波电容的耐压性能。

公开(公告)号：WO2013167016A3

公开(公告)日：2014-01-03

申请号：PCT/CN2013078450

申请日：2013-06-28

Applicant: ZTE CORP

Inventor： PU XIFENG ,  ZHENG DACHENG ,  DAI BINCHUAN ,  LI DAN ,  WAN ZHENGHAI ,  LI JUNKAI

IPC: G01R19/00 ,  H02M1/42

CPC classification number: H02M1/4208 ,  G01R19/00 ,  G01R19/0092 ,  H02M1/42 ,  H02M1/4225 ,  H02M1/4233 ,  H02M7/217 ,  H02M2001/0009 ,  Y02B70/126 ,  Y02P80/112

Abstract: Disclosed are an apparatus and a method for sampling inductor current of a bridgeless PFC circuit. The apparatus comprises a first sampling unit, a second sampling unit, and a third sampling unit. The apparatus for sampling current of the bridgeless PFC circuit is connected to a bridgeless PFC circuit. The first sampling unit is connected in series to a first switch tube (S1) of the bridgeless PFC circuit, and is used for sampling current passing through the first switch tube (S1) to acquire a first sampled signal V1. The second sampling unit is connected in series to a second switch tube (S2) of the bridgeless PFC circuit, and is used for sampling current passing through the second switch tube (S2) to acquire a second sampled signal V2. One end of the third sampling unit is connected to a ground terminal of the bridgeless PFC circuit, the other end is connected to a negative output terminal of a PFC capacitor (C1) of the bridgeless PFC circuit, and is used for sampling current passing through a boost diode of the bridgeless PFC circuit to acquire a third sampled signal V3.

Abstract translation: 公开了一种用于对无桥PFC电路的电感电流进行采样的装置和方法。 该装置包括第一采样单元，第二采样单元和第三采样单元。 用于对无桥PFC电路进行采样电流的装置连接到无桥PFC电路。 第一采样单元串联连接到无桥PFC电路的第一开关管（S1），并用于对通过第一开关管（S1）的电流进行采样以获取第一采样信号V1。 第二采样单元串联连接到无桥PFC电路的第二开关管（S2），并用于对通过第二开关管（S2）的电流进行采样以获取第二采样信号V2。 第三采样单元的一端连接到无桥PFC电路的接地端子，另一端连接到无桥PFC电路的PFC电容器（C1）的负输出端，并用于采样电流通过 无桥PFC电路的升压二极管，以获取第三采样信号V3。