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公开(公告)号：US20140254203A1
公开(公告)日：2014-09-11
申请号：US13786317
申请日：2013-03-05
Applicant: FUTUREWEI TECHNOLOGIES, INC.
Inventor： Heping Dai , Dianbo Fu
IPC: H02M3/335
CPC classification number: H02M3/3353 , H02M3/33592 , H02M2001/0058 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
Abstract: A resonant tank comprises a resonant inductor coupled to a switching network and a transformer, a resonant capacitor coupled to the switching network and the transformer, a first parallel inductor implemented as a magnetizing inductance and a second parallel inductor implement as a separate inductor, wherein a first inductance of the first parallel inductor is greater than a second inductance of the second parallel inductor.
Abstract translation: 谐振箱包括耦合到开关网络和变压器的谐振电感器，耦合到开关网络和变压器的谐振电容器，实现为磁化电感的第一并联电感器和作为单独电感器的第二并联电感器器件，其中a 第一并联电感器的第一电感大于第二并联电感器的第二电感。
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公开(公告)号：US20140198536A1
公开(公告)日：2014-07-17
申请号：US13739920
申请日：2013-01-11
Applicant: FUTUREWEI TECHNOLOGIES, INC.
Inventor： Dianbo Fu , Wensong Yu , Hengchun Mao , Heping Dai
IPC: H02M3/335
CPC classification number: H02M3/33546 , H02M1/14 , H02M3/33576 , H02M3/3376 , H02M7/487 , H02M2007/4815 , Y02B70/1433 , Y02B70/1441
Abstract: A multilevel LLC resonant converter comprises a resonant tank connected in series with a primary side of a transformer, a first switch and a second switch connected in series, wherein a common node of the first switch and the second switch is coupled to a mid-voltage point through a first isolation switch and the resonant bank and a third switch and a fourth switch connected in series, wherein a common node of the third switch and the fourth switch is coupled to the resonant tank.
Abstract translation: 多级LLC谐振转换器包括与变压器的初级侧串联连接的谐振箱，串联连接的第一开关和第二开关，其中第一开关和第二开关的公共节点耦合到中间电压 通过第一隔离开关和谐振库以及串联连接的第三开关和第四开关，其中第三开关和第四开关的公共节点耦合到谐振槽。
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公开(公告)号：US11025248B2
公开(公告)日：2021-06-01
申请号：US16296419
申请日：2019-03-08
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu , Zhaohui Wang , Jun Zhang , Lei Shi
IPC: H03K17/687 , H03K17/16 , H03K17/06 , H03K17/0812 , H03K17/567 , H03K17/0814 , H03K17/74
Abstract: A device includes a first diode and a second diode connected in series between a first terminal and a second terminal of a switching element, wherein the switching element is a unidirectional device and an anode of the first diode is directly connected to an anode of the second diode, a third diode connected between the first terminal and the second terminal of the switching element and a switch connected in parallel with the first diode.
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公开(公告)号：US10938322B2
公开(公告)日：2021-03-02
申请号：US15795506
申请日：2017-10-27
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu
Abstract: A system comprises a first inverter switch and a second inverter switch connected in series between a positive dc bus and a negative dc bus, a freewheeling apparatus connected between a common node of the first inverter switch and the second inverter switch, and ground, a first soft switching network coupled between the positive dc bus and the common node of the first inverter switch and the second inverter switch, wherein the first soft switching network is configured such that the first inverter switch is of a first zero voltage transition and a second soft switching network coupled between the negative dc bus and the common node of the first inverter switch and the second inverter switch, wherein the second soft switching network is configured such that the second inverter switch is of a second zero voltage transition.
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公开(公告)号：US10476372B2
公开(公告)日：2019-11-12
申请号：US14579644
申请日：2014-12-22
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai , Liming Ye , Jinbo Huang , Dianbo Fu
Abstract: A method comprises detecting an input voltage and an output voltage of a buck-boost converter, wherein the buck-boost converter comprises a first high-side switch and a first low-side switch connected in series across an input capacitor, a second high-side switch and a second low-side switch connected in series across an output capacitor and an inductor coupled between a common node of the first high-side switch and the first low-side switch, and a common node of the second high-side switch and the second low-side switch and configuring the buck-boost converter such that at least one of the first high-side switch and second low-side switch operates at a fixed duty cycle mode.
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Patent Agency Ranking
公开(公告)号：US10361626B2
公开(公告)日：2019-07-23
申请号：US16007325
申请日：2018-06-13
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu , Xiaolin Mao , Heping Dai
Abstract: AC to DC converters, more specifically Power Factor Correction (PFC) circuits, using a multi-level waveform and hybrid devices are presented. From an AC voltage input a multi-level waveform is generated, which is used to generate high and low DC output voltage levels. The multi-level waveform is connected to the DC outputs through a corresponding intermediate node by an initial switch, and from the intermediate node to the corresponding output by a hybrid device. The hybrid device includes a first current path, such as a series connected switch-diode pair, in parallel with second current path of a relatively faster and lower current device, such as a diode. The resultant arrangement can use devices having lower voltage ratings relative to typical PFC circuit designs.
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公开(公告)号：US20190123650A1
公开(公告)日：2019-04-25
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
IPC: H02M3/158
CPC classification number: H02M3/1582 , H02M2001/0025 , H02M2001/0032 , H02M2001/0058 , Y02B70/1425 , Y02B70/1491 , Y02B70/16
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.
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公开(公告)号：US10199947B2
公开(公告)日：2019-02-05
申请号：US15479885
申请日：2017-04-05
Applicant: Futurewei Technologies, Inc.
Inventor： Liming Ye , Heping Dai , Dianbo Fu
IPC: H02M3/335
Abstract: In an Input-Series-Output-Parallel (ISOP)-type power converter circuit, a DC-to-DC converter has a positive input coupled to a DC power source and a negative input connected to a negative output. A plurality of capacitors are coupled in series between a positive output of the converter and a circuit ground, the negative output of the converter coupled to a common node of first and second capacitors. A half-bridge inverter network is coupled between the positive output and a circuit ground, each inverter having an input respectively coupled to the first capacitor and the second capacitor. A plurality of resonant tanks are coupled to an output of a respective one of first and second half-bridge inverters. A transformer is coupled to outputs of the plurality of resonant tanks. A rectifier circuit is coupled to a secondary winding of the transformer to provide a DC output voltage.
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29.发明授权公开(公告)号：US10199924B2
公开(公告)日：2019-02-05
申请号：US15498163
申请日：2017-04-26
Applicant: Futurewei Technologies, Inc.
Abstract: An apparatus and associated method are provided involving a converter circuit. The converter circuit includes an inductor including a first terminal configured to be coupled to a power source, and a second terminal. Also included is a pair of serially-coupled transistors coupled to the second terminal of the inductor. The pair of serially-coupled transistors have a transistor intermediate node therebetween. Further included is a pair of serially-coupled diodes coupled to the second terminal of the inductor. The pair of serially-coupled diodes have a diode intermediate node therebetween. A first capacitor is coupled in parallel with the serially-coupled transistors and the serially-coupled diodes. Further, the converter circuit includes a sub-circuit having a second capacitor serially-coupled with an auxiliary transistor. The sub-circuit is coupled between the transistor intermediate node and the diode intermediate node.
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公开(公告)号：US20190020280A1
公开(公告)日：2019-01-17
申请号：US16007273
申请日：2018-06-13
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu , Heping Dai
Abstract: A hybid resonant DC to DC converter uses an LLC or other resonant structure on the primary side, applying a two state waveform to one end of the resonant structure and a multi-state waveform to the other end of the resonant structure. The waveforms are at or near the resonant resonant frequency and the output voltage level is regulated by varying the shape of the multi-state waveform by varying the duty cycle of the switches used to generate it. The allows the converter to operate near or at its optimal resonant point, resulting in higher efficiency, over a wide range of regulated output voltage levels.
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