-
公开(公告)号：US09281752B2
公开(公告)日：2016-03-08
申请号：US14071446
申请日：2013-11-04
Applicant: FutureWei Technologies, Inc.
Inventor： Dianbo Fu , Heping Dai , Liming Ye , Daoshen Chen
CPC classification number: H02M3/33546 , H02M3/33576 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
Abstract: A method comprises providing a resonant converter, wherein the resonant converter comprises an input switch network coupled to a power source, wherein the input switch network comprises a plurality of power switches, a resonant tank coupled to the plurality of power switches, a transformer coupled to the resonant tank and an output stage coupled to the transformer, wherein the output stage comprises a synchronous rectifier formed by a first switch and a second switch, detecting a drain voltage of the first switch, comparing the drain voltage with a predetermined voltage threshold, wherein the drain voltage is coupled to a negative input of a comparator and the predetermined voltage threshold is coupled to a positive input of the comparator, generating a logic state based upon an output of the comparator and adjusting, by a control circuit, a switching frequency of the resonant converter based upon the logic state.
Abstract translation: 一种方法包括提供谐振转换器，其中所述谐振转换器包括耦合到电源的输入开关网络，其中所述输入开关网络包括多个功率开关，耦合到所述多个功率开关的谐振槽，耦合到 所述谐振槽和耦合到所述变压器的输出级，其中所述输出级包括由第一开关和第二开关形成的同步整流器，检测所述第一开关的漏极电压，将所述漏极电压与预定电压阈值进行比较，其中 漏极电压耦合到比较器的负输入，并且预定电压阈值耦合到比较器的正输入，基于比较器的输出产生逻辑状态，并通过控制电路调整开关频率 基于逻辑状态的谐振转换器。
-
公开(公告)号：US10554141B2
公开(公告)日：2020-02-04
申请号：US15477504
申请日：2017-04-03
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai , Liming Ye , Dianbo Fu , Daoshen Chen
Abstract: An apparatus comprises an isolated power converter coupled to an input dc power source, wherein the isolated power converter comprises a first switch network coupled to a first transformer winding and a second switch network coupled to a second transformer winding and a non-isolated power converter coupled to the second switch network of the isolated power converter, wherein a current flowing through the non-isolated power converter is a fraction of a current flowing through the isolated power converter.
-
公开(公告)号：US10554130B2
公开(公告)日：2020-02-04
申请号：US16212943
申请日：2018-12-07
Applicant: Futurewei Technologies, Inc.
Inventor： Liming Ye , Jinbo Huang , Heping Dai , Dianbo Fu , Daoshen Chen
Abstract: A method includes generating a first ramp signal for controlling a first portion of a converter, generating a second ramp signal for controlling a second portion of the converter, controlling a state of a first switch of the first portion through comparing the first ramp signal to a control signal and a state of a first switch of the second portion through comparing the second ramp signal to the control signal and determining a switching cycle of the converter through comparing a current flowing through an inductor of the converter to a threshold.
-
公开(公告)号：US10340807B2
公开(公告)日：2019-07-02
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
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：US10097109B1
公开(公告)日：2018-10-09
申请号：US15653854
申请日：2017-07-19
Applicant: FutureWei Technologies, Inc.
Inventor： Liming Ye , Heping Dai
IPC: H02M7/5387 , H02M3/335 , H02M7/483 , H02M1/088 , H02M3/28
Abstract: An apparatus includes a first switch and a first capacitor connected in series between a first voltage bus and a second voltage bus, a second capacitor and a second switch connected in series between the first voltage bus and the second voltage bus and a diode coupled between a common node of the first switch and the first capacitor, and a common node of the second capacitor and the second switch.
-
Patent Agency Ranking
公开(公告)号：US09876435B2
公开(公告)日：2018-01-23
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
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.
-
公开(公告)号：US09484821B2
公开(公告)日：2016-11-01
申请号：US14071360
申请日：2013-11-04
Applicant: FutureWei Technologies, Inc.
Inventor： Dianbo Fu , Heping Dai , Liming Ye , Daoshen Chen
CPC classification number: H02M3/33507 , H02M3/33569 , H02M2001/0058 , H02M2007/4818 , Y02B70/1433 , Y02B70/1441 , Y02B70/1491
Abstract: An apparatus comprises a first series resonant inductor coupled to a switching network and a transformer, a first series resonant capacitor coupled to the switching network and the transformer, a first parallel inductor coupled to the switching network through the first series resonant inductor and the first series resonant capacitor, a resonant frequency adjusting device coupled to the switching network and the transformer and a switch connected in series with the resonant frequency adjusting device.
Abstract translation: 一种装置包括耦合到开关网络和变压器的第一串联谐振电感器，耦合到开关网络和变压器的第一串联谐振电容器，通过第一串联谐振电感器耦合到开关网络的第一并联电感器和第一系列 谐振电容器，耦合到开关网络和变压器的谐振频率调节装置以及与谐振频率调节装置串联连接的开关。
-
38.发明授权公开(公告)号：US09467054B2
公开(公告)日：2016-10-11
申请号：US14074246
申请日：2013-11-07
Applicant: FutureWei Technologies, Inc.
Inventor： Heping Dai , Xujun Liu , Liming Ye , Daoshen Chen
CPC classification number: H02M3/335 , H02M3/3353 , H02M3/33538 , H02M3/33576 , H02M2001/0009 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
Abstract: An apparatus comprises a magnetic device coupled to an inductor-inductor-capacitor (LLC) resonant converter, an ac current sensing circuit coupled to the magnetic device, an average current sensing circuit coupled to the ac current sensing circuit and a reference voltage source coupled to the average current sensing circuit, wherein the reference voltage source is configured such that a magnitude of an average signal from the average current sensing circuit is greater than a voltage level of the reference voltage source.
Abstract translation: 一种装置包括耦合到电感器 - 电感器 - 电容器（LLC）谐振转换器的磁性装置，耦合到磁性装置的交流电流检测电路，耦合到交流电流检测电路的平均电流检测电路和耦合到 平均电流感测电路，其中参考电压源被配置为使得来自平均电流感测电路的平均信号的幅度大于参考电压源的电压电平。
-
公开(公告)号：US09461554B2
公开(公告)日：2016-10-04
申请号：US14502196
申请日：2014-09-30
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu , Liming Ye , Heping Dai , Daoshen Chen
CPC classification number: H02M3/33584 , H02M3/1582 , H02M2001/0058 , H02M2001/007 , Y02B70/1425 , Y02B70/1433 , Y02B70/1491
Abstract: A converter comprises a non-isolated stage coupled to an input dc power source, wherein the non-isolated stage is configured to operate at a buck converter mode in response to a first input voltage and operate at a boost converter mode in response to a second input voltage, a resonant stage coupled between the non-isolated stage and a load, wherein the resonant stage is configured to operate at a resonant mode and a capacitor coupled between the non-isolated stage and the resonant stage.
Abstract translation: A转换器包括耦合到输入直流电源的非隔离级，其中所述非隔离级被配置为响应于第一输入电压在降压转换器模式下操作并响应于第二输入电压在升压转换器模式下操作 输入电压，耦合在所述非隔离级与负载之间的谐振级，其中所述谐振级被配置为在谐振模式下工作，以及耦合在所述非隔离级与所述谐振级之间的电容器。
-
公开(公告)号：US09350260B2
公开(公告)日：2016-05-24
申请号：US14074194
申请日：2013-11-07
Applicant: FutureWei Technologies, Inc.
Inventor： Heping Dai , Daoshen Chen , Xujun Liu , Liming Ye
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。
-
-
-
-
-
-
-
-
-
Search Results
58
records
(took 0.019 seconds)
