公开(公告)号：US09577512B2

公开(公告)日：2017-02-21

申请号：US14896668

申请日：2014-04-25

Applicant: ZTE CORPORATION

Inventor： Jing Wang ,  Junming Zhang ,  Jie Fan ,  Jianping Zhou

IPC: H02M1/42 ,  G01R19/175 ,  H02M7/219 ,  H02M1/00

CPC classification number: H02M1/42 ,  G01R19/175 ,  H02M1/4233 ,  H02M7/219 ,  H02M2001/0009 ,  Y02B70/126 ,  Y02P80/112

Abstract: Disclosed are a current zero-cross detection device, zero-cross current signal acquisition circuit and totem pole bridgeless circuit system. The current zero-cross detection device includes a current transformer, first sampling switch, second sampling switch, sampling resister, comparator. The current transformer includes a primary winding and a secondary winding; the primary winding is connected to a circuit to be detected; two ends of the secondary winding are connected respectively to drain electrodes of the first and second sampling switches; source electrodes of first and second sampling switches are connected to ground; two ends of the sampling resistor are connected respectively to the drain electrode and source electrode of the second sampling switch; the negative input end of the comparator is connected to the drain electrode of the second sampling switch, its positive input end is connected to a reference voltage; the first and second sampling switches are in ON or OFF state.

Abstract translation: 公开了目前的零交叉检测装置，零交叉电流信号采集电路和图腾柱无桥电路系统。 目前的零交叉检测装置包括电流互感器，第一采样开关，第二采样开关，采样电阻，比较器。 电流互感器包括初级绕组和次级绕组; 初级绕组连接到要检测的电路; 次级绕组的两端分别连接到第一和第二采样开关的漏电极; 第一和第二采样开关的源电极连接到地; 采样电阻的两端分别连接到第二采样开关的漏电极和源极; 比较器的负输入端连接到第二采样开关的漏电极，其正输入端连接到参考电压; 第一和第二采样开关处于ON或OFF状态。

公开(公告)号：US09899909B2

公开(公告)日：2018-02-20

申请号：US15028131

申请日：2014-06-20

Applicant: ZTE CORPORATION

Inventor： Guoxian Lin ,  Jianping Zhou ,  Tao Liu ,  Junming Zhang

IPC: H02M1/42 ,  H02M7/217 ,  H02M7/219 ,  H02M7/162 ,  H02M7/06 ,  H02M1/00

CPC classification number: H02M1/42 ,  H02M1/4225 ,  H02M2001/0058 ,  Y02B70/126 ,  Y02B70/1491 ,  Y02P80/112

Abstract: Disclosed are a totem-pole bridgeless power factor correction (PFC) soft switch control device and method, wherein, the device includes a totem pole bridgeless PFC circuit, and the totem pole bridgeless PFC circuit includes at least two bridge arms connected in parallel between a first connecting point and a second connecting point: the first bridge arm includes two switches or diodes connected in serial in a same direction, the second bridge arm includes two switches that are connected in serial in the same direction, the totem pole bridgeless PFC circuit includes at least one PFC inductor, and further a filter capacitor and a load connected in parallel between the first connecting point and the second connecting point.