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公开(公告)号：US10454381B2
公开(公告)日：2019-10-22
申请号：US15693930
申请日：2017-09-01
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Bin Li , Zhengyang Liu , Fred C. Lee , Qiang Li
IPC: H02J7/00 , H02M3/335 , H02M1/088 , H02M1/42 , H02J7/04 , H02M1/14 , H01F27/24 , H01F27/28 , H02M3/337 , H02J7/02 , H01F27/34 , H02M1/00
Abstract: A variable direct current (DC) link power converter is described. In one example, the power converter includes a first converter stage configured to convert power from a power source to power at an intermediate link voltage and a second converter stage configured to convert the power at the intermediate link voltage to power for charging a battery. The power converter further includes a control system having an intermediate link voltage regulation control loop configured, in a first mode of operation, to regulate the intermediate link voltage through the first converter stage based on a voltage of the battery, and a ripple regulation control loop configured to sense a charging current for the battery and regulate a gain of the second converter stage based on the charging current to reduce ripple in the charging current. A new configuration of transformer suitable for use with the power converter is also described.
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2.发明授权公开(公告)号：US10291109B2
公开(公告)日：2019-05-14
申请号：US15868486
申请日：2018-01-11
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Zhengrong Huang , Zhengyang Liu , Fred C. Lee , Qiang Li , Furong Xiao
Abstract: Critical-mode soft-switching techniques for a power converter are described. In one example, a power converter includes a converter electrically coupled between an alternating current (AC) power system and a direct current (DC) power system, where the converter includes a number of phase legs. The power converter can also include a control system configured, during a portion of a whole line cycle of the AC power system, to clamp a first phase leg of the converter from switching and operate second and third phase legs of the converter independently in either critical conduction mode (CRM) or in discontinuous conduction mode (DCM).
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3.发明申请公开(公告)号：US20180205306A1
公开(公告)日：2018-07-19
申请号：US15868486
申请日：2018-01-11
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Zhengrong Huang , Zhengyang Liu , Fred C. Lee , Qiang Li , Furong Xiao
CPC classification number: H02M1/083 , H02M1/126 , H02M7/219 , H02M7/797 , H02M2001/0058 , Y02B70/1491
Abstract: Critical-mode soft-switching techniques for a power converter are described. In one example, a power converter includes a converter electrically coupled between an alternating current (AC) power system and a direct current (DC) power system, where the converter includes a number of phase legs. The power converter can also include a control system configured, during a portion of a whole line cycle of the AC power system, to clamp a first phase leg of the converter from switching and operate second and third phase legs of the converter independently in either critical conduction mode (CRM) or in discontinuous conduction mode (DCM).
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公开(公告)号：US20180076723A1
公开(公告)日：2018-03-15
申请号：US15693930
申请日：2017-09-01
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Bin Li , Zhengyang Liu , Fred C. Lee , Qiang Li
IPC: H02M3/335 , H02M1/088 , H02M1/42 , H02J7/04 , H02J7/00 , H02M1/14 , H01F27/24 , H01F27/28 , H01F27/34
CPC classification number: H02M3/33569 , H01F27/24 , H01F27/28 , H01F27/346 , H01F2027/2819 , H02J7/0063 , H02J7/022 , H02J7/04 , H02J2007/0067 , H02M1/088 , H02M1/14 , H02M1/4208 , H02M3/3378 , H02M2001/0048 , H02M2001/007 , Y02B40/90 , Y02B70/126 , Y02B70/1491
Abstract: A variable direct current (DC) link power converter is described. In one example, the power converter includes a first converter stage configured to convert power from a power source to power at an intermediate link voltage and a second converter stage configured to convert the power at the intermediate link voltage to power for charging a battery. The power converter further includes a control system having an intermediate link voltage regulation control loop configured, in a first mode of operation, to regulate the intermediate link voltage through the first converter stage based on a voltage of the battery, and a ripple regulation control loop configured to sense a charging current for the battery and regulate a gain of the second converter stage based on the charging current to reduce ripple in the charging current. A new configuration of transformer suitable for use with the power converter is also described.
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