公开(公告)号：US10284097B2

公开(公告)日：2019-05-07

申请号：US16173904

申请日：2018-10-29

Applicant: Futurewei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Zhihua Liu ,  Liming Ye ,  Dianbo Fu ,  Ce Liu ,  Bing Cai

IPC: H02M3/156 ,  H02M3/22 ,  H02M3/335 ,  H02M3/337 ,  H02M3/325 ,  H02M1/14 ,  H02M1/00

Abstract: A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

公开(公告)号：US09444346B2

公开(公告)日：2016-09-13

申请号：US14056532

申请日：2013-10-17

Applicant: FutureWei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Zhihua Liu ,  Liming Ye ,  Dianbo Fu ,  Ce Liu ,  Bing Cai

IPC: H02M3/22 ,  H02M3/156 ,  H02M3/325 ,  H02M3/335 ,  H02M3/337 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M1/14 ,  H02M3/156 ,  H02M3/22 ,  H02M3/325 ,  H02M3/33523 ,  H02M3/33569 ,  H02M3/33576 ,  H02M3/33592 ,  H02M3/337 ,  H02M3/3376 ,  H02M2001/0009 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A converter comprises an input stage coupled to a power source, wherein the input stage comprises a plurality of power switches, a resonant tank coupled to the plurality of power switches, a transformer coupled to the resonant tank, an output stage coupled to the transformer, an efficiency point tracking indicator coupled to the converter, a detector coupled to the efficiency point tracking indicator and a control circuit configured to receive an efficiency point tracking signal from the detector and adjust a switching frequency of the power switches based upon the efficiency point tracking signal.

Abstract translation: A转换器包括耦合到电源的输入级，其中所述输入级包括多个功率开关，耦合到所述多个功率开关的谐振槽，耦合到所述谐振回路的变压器，耦合到所述变压器的输出级， 耦合到转换器的效率点跟踪指示器，耦合到效率点跟踪指示器的检测器和配置成从检测器接收效率点跟踪信号的控制电路，并且基于效率点跟踪信号调整功率开关的开关频率 。

公开(公告)号：US10116219B2

公开(公告)日：2018-10-30

申请号：US15263121

申请日：2016-09-12

Applicant: Futurewei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Zhihua Liu ,  Liming Ye ,  Dianbo Fu ,  Ce Liu ,  Bing Cai

IPC: H02M3/335 ,  H02M3/22 ,  H02M3/156 ,  H02M3/325 ,  H02M3/337 ,  H02M1/14 ,  H02M1/00

Abstract: A method comprises connecting a first resonant converter and a second resonant converter in parallel, detecting a first signal indicating a first soft switching process of the first resonant converter and a second signal indicating a second soft switching process of the second resonant converter and adjusting a first switching frequency of the first resonant converter by a first control circuit and a second switching frequency of the second resonant converter by a second control circuit until a load current flowing through the first resonant converter is substantially equal to a load current flowing through the second resonant converter.

公开(公告)号：US20180102713A1

公开(公告)日：2018-04-12

申请号：US15838745

申请日：2017-12-12

Applicant: Futurewei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Liming Ye ,  Dianbo Fu

IPC: H02M3/335 ,  H02M1/08 ,  H02M3/338 ,  H02M1/14 ,  H02M1/36 ,  H02M1/00 ,  H02M7/48 ,  H02M1/088

CPC classification number: H02M3/33546 ,  H02M1/08 ,  H02M1/088 ,  H02M1/14 ,  H02M1/36 ,  H02M3/3353 ,  H02M3/33553 ,  H02M3/33576 ,  H02M3/33592 ,  H02M3/3385 ,  H02M7/4807 ,  H02M2001/0006 ,  H02M2001/0058 ,  H02M2007/4818 ,  Y02B70/1433 ,  Y02B70/1441 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A device comprises a gate drive bridge coupled between a bias voltage of a power converter and ground and a transformer connected to the gate drive bridge, wherein the transformer comprises a primary winding connected to two legs of the gate drive bridge respectively and a plurality of secondary windings configured to generate gate drive signals for low side switches, high side switches and secondary switches of the power converter.

公开(公告)号：US20170040903A1

公开(公告)日：2017-02-09

申请号：US15297818

申请日：2016-10-19

Applicant: Futurewei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Liming Ye ,  Dianbo Fu

IPC: H02M3/335 ,  H02M1/36 ,  H02M1/14

CPC classification number: H02M3/33546 ,  H02M1/08 ,  H02M1/088 ,  H02M1/14 ,  H02M1/36 ,  H02M3/3353 ,  H02M3/33553 ,  H02M3/33576 ,  H02M3/33592 ,  H02M3/3385 ,  H02M7/4807 ,  H02M2001/0006 ,  H02M2001/0058 ,  H02M2007/4818 ,  Y02B70/1433 ,  Y02B70/1441 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A method comprises providing a resonant converter comprising a switching network comprising a first high-side switch, a second high-side switch, a first low-side switch and a second low-side switch, a resonant tank coupled between the switching network and a transformer and a rectifier coupled to a secondary side of the transformer, coupling a driver to the switching network and the rectifier, wherein the driver includes a first winding coupled to the rectifier, a second winding coupled to the first high-side switch and a third winding coupled to the second high-side switch, detecting a signal indicating a soft switching process of the driver and adjusting a resonant frequency of the driver until the resonant frequency of the driver approximately matches a switch frequency of the resonant converter.

Abstract translation: 一种方法包括提供包括开关网络的谐振转换器，该开关网络包括第一高侧开关，第二高侧开关，第一低侧开关和第二低侧开关，耦合在开关网络和 变压器和整流器耦合到变压器的次级侧，将驱动器耦合到开关网络和整流器，其中驱动器包括耦合到整流器的第一绕组，耦合到第一高侧开关的第二绕组和第三绕组 绕组耦合到第二高侧开关，检测指示驱动器的软开关处理的信号，并调整驱动器的谐振频率，直到驱动器的谐振频率近似于谐振转换器的开关频率。

公开(公告)号：US09479073B2

公开(公告)日：2016-10-25

申请号：US14077406

申请日：2013-11-12

Applicant: FutureWei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Liming Ye ,  Dianbo Fu

IPC: H02M3/335 ,  H02M3/338 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/33546 ,  H02M1/08 ,  H02M1/088 ,  H02M1/14 ,  H02M1/36 ,  H02M3/3353 ,  H02M3/33553 ,  H02M3/33576 ,  H02M3/33592 ,  H02M3/3385 ,  H02M7/4807 ,  H02M2001/0006 ,  H02M2001/0058 ,  H02M2007/4818 ,  Y02B70/1433 ,  Y02B70/1441 ,  Y02B70/1491 ,  Y02P80/112

Abstract: An apparatus comprises a bridge coupled between a bias voltage and ground, wherein the bridge comprises a first switch and a second switch connected in series and coupled between the bias voltage and ground and a third switch and a fourth switch connected in series and coupled between the bias voltage and ground, a resonant device coupled to the bridge, wherein the resonant device comprises a fixed capacitance, a gate capacitance and a magnetizing inductance, a transformer coupled to the resonant device, wherein the transformer comprises a primary winding and a plurality of secondary windings.

Abstract translation: 一种装置包括耦合在偏置电压和接地之间的桥，其中桥包括串联连接并耦合在偏置电压和地之间的第一开关和第二开关，以及串联耦合在第三开关和第四开关之间的第三开关和第四开关， 偏置电压和接地，耦合到桥的谐振装置，其中所述谐振装置包括固定电容，栅极电容和磁化电感，耦合到所述谐振装置的变压器，其中所述变压器包括初级绕组和多个次级绕组 绕组。

公开(公告)号：US20150124488A1

公开(公告)日：2015-05-07

申请号：US14074194

申请日：2013-11-07

Applicant: FutureWei Technologies, Inc.

Inventor： Heping Dai ,  Daoshen Chen ,  Xujun Liu ,  Liming Ye

IPC: H02M3/335

CPC classification number: H02M3/3376 ,  H02M1/36 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A method comprises providing a resonant converter comprising a switching network comprising a plurality of switches, a resonant tank coupled between the switching network and a transformer, wherein the resonant tank comprises a series resonant inductor coupled to a switching network and the transformer and a series resonant capacitor coupled to the switching network and the transformer and a driver having an adjustable bias voltage and in response to a startup process of the resonant converter, configuring the switching network to operate a switching frequency higher than a resonant frequency of the resonant tank.

Abstract translation: 一种方法包括提供一种包括交换网络的谐振转换器，该交换网络包括多个开关，耦合在所述开关网络和变压器之间的谐振箱，其中所述谐振箱包括耦合到开关网络的串联谐振电感器和所述变压器以及串联谐振 耦合到开关网络和变压器的电容器和具有可调偏压的驱动器，并且响应于谐振转换器的启动过程，配置开关网络以操作高于谐振回路的谐振频率的开关频率。

公开(公告)号：US20190074774A1

公开(公告)日：2019-03-07

申请号：US16173904

申请日：2018-10-29

Applicant: Futurewei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Zhihua Liu ,  Liming Ye ,  Dianbo Fu ,  Ce Liu ,  Bing Cai

IPC: H02M3/335 ,  H02M3/337 ,  H02M3/325 ,  H02M3/156 ,  H02M3/22 ,  H02M1/14

Abstract: A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

公开(公告)号：US09812968B2

公开(公告)日：2017-11-07

申请号：US14548106

申请日：2014-11-19

Applicant: Futurewei Technologies, Inc.

Inventor： Jinbo Huang ,  Xujun Liu ,  Dianbo Fu ,  Liming Ye ,  Heping Dai ,  Daoshen Chen

IPC: H02M3/158 ,  H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M3/158 ,  H02M3/1582 ,  H02M2001/0009 ,  H02M2001/0058 ,  Y02B70/1425 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A converter comprises a switch network coupled to a power source, wherein the switch network comprises a plurality of power switches, a magnetic device coupled to the switch network, a detector coupled to the magnetic device through a magnetic coupling and a control circuit configured to receive a zero voltage switching signal from the detector and adjust gate drive signals of the power switches based upon the zero voltage switching signal.

公开(公告)号：US20160380547A1

公开(公告)日：2016-12-29

申请号：US15263121

申请日：2016-09-12

Applicant: Futurewei Technologies, Inc.

Inventor： Daoshen Chen ,  Heping Dai ,  Xujun Liu ,  Zhihua Liu ,  Liming Ye ,  Dianbo Fu ,  Ce Liu ,  Bing Cai

IPC: H02M3/335 ,  H02M1/14

CPC classification number: H02M3/33507 ,  H02M1/14 ,  H02M3/156 ,  H02M3/22 ,  H02M3/325 ,  H02M3/33523 ,  H02M3/33569 ,  H02M3/33576 ,  H02M3/33592 ,  H02M3/337 ,  H02M3/3376 ,  H02M2001/0009 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A method comprises connecting a first resonant converter and a second resonant converter in parallel, detecting a first signal indicating a first soft switching process of the first resonant converter and a second signal indicating a second soft switching process of the second resonant converter and adjusting a first switching frequency of the first resonant converter by a first control circuit and a second switching frequency of the second resonant converter by a second control circuit until a load current flowing through the first resonant converter is substantially equal to a load current flowing through the second resonant converter.

Abstract translation: 一种方法包括并联连接第一谐振转换器和第二谐振转换器，检测指示第一谐振转换器的第一软开关处理的第一信号和指示第二谐振转换器的第二软开关处理的第二信号， 通过第二控制电路通过第一控制电路和第二谐振变换器的第二开关频率使第一谐振变换器的开关频率直到流过第一谐振变换器的负载电流基本上等于流经第二谐振变换器的负载电流 。