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公开(公告)号：US10217559B2
公开(公告)日：2019-02-26
申请号：US15484641
申请日：2017-04-11
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Yuchen Yang , Mingkai Mu , Fred C. Lee , Qiang Li
Abstract: A power factor correction (PFC) power converter, particularly of a multiphase totem-pole or other topology presenting a switching bridge that can potentially provide bi-directional power transfer control, reduces a nominal switching frequency and achieves zero voltage switching over an increased portion of a half line cycle by providing positive or inverse coupling of inductors in an inductor structure that can be formed of a multi-layer printed circuit board such that at least three different inductances are presented during each half line cycle period; allowing increased switching frequency and simplifying EMI filtering arrangements. Parasitic capacitances can be balanced with additional coupled windings to reduce differential mode and common mode noise. The PFC power converter is particularly applicable to provide bi-directional power control from an on-board battery charger in an electrically powered vehicle.
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公开(公告)号：US20170294833A1
公开(公告)日：2017-10-12
申请号：US15484641
申请日：2017-04-11
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Yuchen Yang , Mingkai Mu , Fred C. Lee , Qiang Li
CPC classification number: H01F27/2804 , H01F2027/2809 , H02M1/4225 , H02M7/23 , Y02B70/126
Abstract: A power factor correction (PFC) power converter, particularly of a multiphase totem-pole or other topology presenting a switching bridge that can potentially provide bi-directional power transfer control, reduces a nominal switching frequency and achieves zero voltage switching over an increased portion of a half line cycle by providing positive or inverse coupling of inductors in an inductor structure that can be formed of a multi-layer printed circuit board such that at least three different inductances are presented during each half line cycle period; allowing increased switching frequency and simplifying EMI filtering arrangements. Parasitic capacitances can be balanced with additional coupled windings to reduce differential mode and common mode noise. The PFC power converter is particularly applicable to provide bi-directional power control from an on-board battery charger in an electrically powered vehicle.
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3.发明授权Method for reducing or eliminating conducted common mode noise in a transformer 有权用于减少或消除变压器中传导的共模噪声的方法公开(公告)号：US09589718B2
公开(公告)日：2017-03-07
申请号：US13888743
申请日：2013-05-07
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Yuchen Yang , Daocheng Huang , Qiang Li , Fred C. Lee
CPC classification number: H01F27/362 , H01F27/2804 , Y10T29/4902
Abstract: At least one shield member interposed between primary and secondary windings of a transformer and connected to the primary and/or secondary windings forms a distributed parasitic capacitance between the shield member and either the winding to which it is not connected or another shield member connected to that winding. Connections are made to the respective transformer windings such that the voltage distributions thus developed cause complementary common mode noise to be conducted in opposite directions in respective portions of the parasitic capacitance such that net common mode current can be made arbitrarily small without requiring that both sides of the distributed parasitic capacitance have complementary or equal voltage distributions. Such complementary common mode currents can be achieved by dividing opposing shield members or developing a voltage distribution in a single shield member in accordance with Faraday's Law.
Abstract translation: 插入在变压器的初级绕组和次级绕组之间并连接到初级和/或次级绕组的至少一个屏蔽构件在屏蔽构件与未连接的绕组之间形成分布的寄生电容，或者与未连接的绕组连接的另一个屏蔽构件 绕组。 连接到相应的变压器绕组，使得如此形成的电压分布导致互补共模噪声在寄生电容的各个部分中以相反的方向传导，使得净共模电流可以任意地小，而不需要两 分布式寄生电容具有互补或相等的电压分布。 这种互补共模电流可以通过根据法拉第定律划分相对的屏蔽构件或在单个屏蔽构件中显示电压分布来实现。
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4.发明申请公开(公告)号：US20140334198A1
公开(公告)日：2014-11-13
申请号：US13888743
申请日：2013-05-07
Applicant: Virginia Tech Intellectual Properties, Inc.
Inventor： Yuchen Yang , Daocheng Huang , Qiang Li , Fred C. Lee
CPC classification number: H01F27/362 , H01F27/2804 , Y10T29/4902
Abstract: At least one shield member interposed between primary and secondary windings of a transformer and connected to the primary and/or secondary windings forms a distributed parasitic capacitance between the shield member and either the winding to which it is not connected or another shield member connected to that winding. Connections are made to the respective transformer windings such that the voltage distributions thus developed cause complementary common mode noise to be conducted in opposite directions in respective portions of the parasitic capacitance such that net common mode current can be made arbitrarily small without requiring that both sides of the distributed parasitic capacitance have complementary or equal voltage distributions. Such complementary common mode currents can be achieved by dividing opposing shield members or developing a voltage distribution in a single shield member in accordance with Faraday's Law.
Abstract translation: 插入在变压器的初级绕组和次级绕组之间并连接到初级和/或次级绕组的至少一个屏蔽构件在屏蔽构件与未连接的绕组之间形成分布的寄生电容，或者与未连接的绕组连接的另一个屏蔽构件 绕组。 连接到相应的变压器绕组，使得如此形成的电压分布导致互补共模噪声在寄生电容的各个部分中以相反的方向传导，使得净共模电流可以任意地小，而不需要两 分布式寄生电容具有互补或相等的电压分布。 这种互补共模电流可以通过根据法拉第定律划分相对的屏蔽构件或在单个屏蔽构件中显示电压分布来实现。
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