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公开(公告)号：US20190020271A1
公开(公告)日：2019-01-17
申请号：US16007325
申请日：2018-06-13
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu , Xiaolin Mao , Heping Dai
IPC: H02M1/42
CPC classification number: H02M1/4266 , H02M1/4208 , H02M7/06 , H02M7/483 , H02M7/487 , H02M2001/0048
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 correpsonding intermediate node by an initial switch, and from the intermediate node to the correpsonding 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 relativley faster and lower current device, such as a diode. The resultant arrangement can use devices having lower voltage ratings relative to typical PFC cirucit designs.
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公开(公告)号：US10164544B2
公开(公告)日：2018-12-25
申请号：US15635705
申请日：2017-06-28
Applicant: Futurewei Technologies, Inc.
Inventor： Liming Ye , Heping Dai , Dianbo Fu
Abstract: An Input-Series-Output-Parallel (ISOP)-type partial power converter circuit comprises: an isolated, unregulated DC-to-DC converter configured to generate a first output voltage at a first output voltage node; and a regulated DC-to-DC converter coupled with the unregulated DC-to-DC converter and configured to generate a second output voltage at a second output voltage node, the regulated DC-to-DC converter comprising a resonant forward-flyback converter configuration; wherein the first output voltage node is coupled in parallel with the second output voltage node.
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公开(公告)号：US10163562B2
公开(公告)日：2018-12-25
申请号：US13705287
申请日：2012-12-05
Applicant: FutureWei Technologies, Inc.
Inventor： Dianbo Fu , Yunfeng Liu , Yanshen Hu
Abstract: An embodiment apparatus comprises a magnetic core comprising a first side and a second side opposite the first side, a first winding comprising a first portion wound around the first side and a second portion wound around the second side, a second winding comprising a third portion wound around the first side and a fourth portion wound around the second side, wherein the second portion and the fourth portion are coupled to each other.
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公开(公告)号：US20180316342A1
公开(公告)日：2018-11-01
申请号：US15497390
申请日：2017-04-26
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu , Zhaohui Wang , Jun Zhang , Lei Shi
IPC: H03K17/16
CPC classification number: H03K17/168 , H03K17/06 , H03K17/08128 , H03K17/567 , H03K17/6877 , H03K2017/066
Abstract: A device comprises a first diode and a second diode connected in series between a first terminal and a second terminal of a switching element, wherein 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 first switch connected in parallel with the first diode.
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公开(公告)号：US20180294732A1
公开(公告)日：2018-10-11
申请号：US15479885
申请日：2017-04-05
Applicant: Futurewei Technologies, Inc.
Inventor： Liming Ye , Heping Dai , Dianbo Fu
IPC: H02M3/335
CPC classification number: H02M3/33546 , H02M3/33569 , H02M3/337 , H02M2001/0058 , H02M2001/007 , H02M2001/0074 , H02M2001/0077 , Y02B70/1433
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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Patent Agency Ranking
公开(公告)号：US09979291B2
公开(公告)日：2018-05-22
申请号：US15335339
申请日：2016-10-26
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu
CPC classification number: H02M3/158 , H02J3/383 , H02M7/487 , H02M2001/007
Abstract: An inverter apparatus is provided for converting direct current to alternating current. The inverter apparatus includes a boost converter coupled between a power source and a bypass circuit, and a power inverter coupled between the bypass circuit and a load to generate an output voltage. The output voltage is powered by the power source directly via the bypass circuit without activating the boost converter when the output voltage is smaller than a threshold voltage. The output voltage is powered by the power source boosted by the boost converter when the output voltage is larger than the threshold voltage. High efficiency is achieved by bypassed the boost converter.
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公开(公告)号：US09793810B2
公开(公告)日：2017-10-17
申请号：US14850125
申请日：2015-09-10
Applicant: Futurewei Technologies, Inc.
Inventor： Dianbo Fu , Jinbo Huang , Ce Liu , Liming Ye , Heping Dai , Daoshen Chen
IPC: H02M3/158
CPC classification number: H02M3/1582 , H02M2001/0058 , Y02B70/1491
Abstract: A method comprises providing a buck-boost converter comprising 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, detecting a first voltage resonance waveform across a switch of the buck-boost converter and turning on the switch of the buck-boost converter when the first voltage resonance waveform falls to zero.
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公开(公告)号：US09787200B2
公开(公告)日：2017-10-10
申请号：US15061717
申请日：2016-03-04
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 detecting a signal representing a drain-to-source voltage of a switch of a synchronous rectifier of an inductor-inductor-capacitor (LLC) resonant converter, comparing the signal with a predetermined threshold, generating a first logic state if the drain-to-source voltage is greater than the predetermined threshold, generating a second logic state if the drain-to-source voltage is less than the predetermined threshold and in response to the first logic state and the second logic state, adjusting a switching frequency of the LLC resonant converter such that the switching frequency moves back and forth across a boundary of body diode conduction, wherein a frequency difference between the switching frequency and a resonant frequency of the LLC resonant converter is less than or equal to one frequency adjustment step.
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公开(公告)号：US20170207707A1
公开(公告)日：2017-07-20
申请号：US15477504
申请日：2017-04-03
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai , Liming Ye , Dianbo Fu , Daoshen Chen
CPC classification number: H02M3/3372 , H02M3/07 , H02M3/1582 , H02M3/18 , H02M3/33576 , H02M3/337 , H02M2001/0058 , H02M2001/007 , Y02B70/1433 , Y02B70/1491
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.
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公开(公告)号：US20170063251A1
公开(公告)日：2017-03-02
申请号：US14836630
申请日：2015-08-26
Applicant: Futurewei Technologies, Inc.
Inventor： Liming Ye , Heping Dai , Dianbo Fu
CPC classification number: H02M3/33576 , H02M7/483 , H02M2001/0058 , Y02B70/1491
Abstract: A converter is provided. The converter includes a first DC/DC converter, a non-isolated DC/DC converter and a control circuit. The first DC/DC converter includes a transformer, a primary side inverter and a secondary side rectifier. The primary side inverter and a secondary side rectifier are operable at multiple operating modes. The control circuit determines an operating mode for the primary side inverter or the secondary side rectifier, and controls the primary side inverter or the secondary side rectifier to change its respective operating mode.
Abstract translation: 提供A转换器。 该转换器包括第一DC / DC转换器，非隔离DC / DC转换器和控制电路。 第一DC / DC转换器包括变压器，初级侧逆变器和次级侧整流器。 初级侧逆变器和次级侧整流器可在多种工作模式下工作。 控制电路确定初级侧逆变器或次级侧整流器的工作模式，并控制一次侧逆变器或次级侧整流器来改变其相应的工作模式。
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