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

IPC: H02M1/42 ,  H01F27/28 ,  H02M1/084

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.

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

IPC: H02M1/42 ,  H02M1/084 ,  H01F27/28 ,  H02M7/23

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.

公开(公告)号：US20160172976A1

公开(公告)日：2016-06-16

申请号：US14957743

申请日：2015-12-03

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Mingkai Mu ,  Sizhao Lu ,  Yang Jiao ,  Fred C. Lee

IPC: H02M3/158 ,  H02M1/14

CPC classification number: H02M7/493 ,  H02M7/487 ,  H02M2001/123

Abstract: Output current ripple is reduced in a three-level DC-DC power converter by connecting a plurality of phase legs in parallel between a source of input power and an output of the power converter and conducting power from the source of input power to the power converter output in an interleaved manner. The large current that results from such interleaved operation is reduced to acceptable levels, potentially less than the output current ripple of the power converter by providing inversely coupled inductors having a mutual inductance preferably greater than the inductor of the power converter in respective phase legs and in series in the circulating current path to avoid any need to increase the power converter inductance due to the circulating current. The inductor and inversely coupled inductors are preferably integrated into a single magnetic element of compact design.

Abstract translation: 在三电平DC-DC电力转换器中，通过在输入电源和功率转换器的输出之间并联连接多个相位支路并将功率从输入电源输入到功率转换器，从而降低输出电流纹波 以交错方式输出。 由这种交错操作产生的大电流通过提供具有互感的反耦合电感，可以降低到可接受的水平，该功率转换器的输出电流纹波可能小于功率转换器的输出电流纹波，所述反耦合电感优选地大于相位相位中的功率转换器的电感器， 串联在循环电流路径中，以避免由于循环电流而增加功率转换器电感。 电感器和反耦合电感器优选地集成到紧凑设计的单个磁性元件中。

公开(公告)号：US10396684B2

公开(公告)日：2019-08-27

申请号：US14957743

申请日：2015-12-03

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Mingkai Mu ,  Sizhao Lu ,  Yang Jiao ,  Fred C. Lee

IPC: H02M1/12 ,  H02M7/487 ,  H02M7/493

Abstract: Output current ripple is reduced in a three-level DC-DC power converter by connecting a plurality of phase legs in parallel between a source of input power and an output of the power converter and conducting power from the source of input power to the power converter output in an interleaved manner. The large current that results from such interleaved operation is reduced to acceptable levels, potentially less than the output current ripple of the power converter by providing inversely coupled inductors having a mutual inductance preferably greater than the inductor of the power converter in respective phase legs and in series in the circulating current path to avoid any need to increase the power converter inductance due to the circulating current. The inductor and inversely coupled inductors are preferably integrated into a single magnetic element of compact design.