公开(公告)号：US09602008B1

公开(公告)日：2017-03-21

申请号：US14857023

申请日：2015-09-17

Applicant: DENSO CORPORATION

Inventor： Kenji Tomita ,  Kimikazu Nakamura ,  Shinya Goto ,  Katsutoyo Misawa ,  Yuuichi Handa ,  Seiji Iyasu

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/3378

Abstract: A power conversion apparatus supplies power from a DC power supply to a capacitive load by a current input push-pull DCDC converter provided with switching elements Q1 and Q2. When a capacitive load voltage is not larger than a second predetermined value, a first mode is used which turns ON one of the switching elements Q1 and Q2 alternated with turning OFF both. When the capacitive load voltage is larger than the second predetermined value but not larger than a first predetermined value, a second mode is used which turns ON both of the switching elements Q1 and Q2, then turns ON one of them, then turns OFF both, sequentially. When the capacitive load voltage is larger than the first predetermined value, a third mode is used, turning ON both of the switching elements Q1 and Q2 alternated with turning ON one of them.

公开(公告)号：US09712049B2

公开(公告)日：2017-07-18

申请号：US14186169

申请日：2014-02-21

Applicant: DENSO CORPORATION ,  NIPPON SOKEN, INC.

Inventor： Shinya Goto ,  Yuuki Takemoto ,  Katsutoyo Misawa ,  Tougo Yamaguchi ,  Shinji Ohoka

IPC: H02J1/02 ,  H02M1/44 ,  H02M7/00

CPC classification number: H02M1/44 ,  H02M7/003

Abstract: In a power converter, a housing is grounded. A power converter circuit is installed in the housing and configured to perform power conversion of input power into output power. An external terminal is electrically connected to the power converter circuit for connection of an external device to the power converter circuit. A first capacitor has first and second electrodes. The first electrode of the first capacitor is connected to the external terminal, and the second electrode thereof is connected to the housing. A second capacitor has first and second electrodes. The first electrode of the second capacitor is connected to the external terminal, and the second electrode thereof is connected to the housing. The first capacitor, the external terminal, the second capacitor, and the housing is arranged to provide a conductive loop.

公开(公告)号：US09692291B2

公开(公告)日：2017-06-27

申请号：US14186255

申请日：2014-02-21

Applicant: NIPPON SOKEN, INC. ,  DENSO CORPORATION

Inventor： Shinji Ohoka ,  Shinya Goto ,  Katsutoyo Misawa ,  Yuuki Takemoto ,  Tougo Yamaguchi

IPC: H04B3/00 ,  H04B15/00 ,  H02M1/14 ,  H02M3/337

CPC classification number: H02M1/14 ,  H02M3/3376

Abstract: A noise filter is assembled to an electric power conversion device and has a metal housing casing and two capacitors connected to an external terminal of the device through which an electric power conversion circuit is connected to an external device. The two capacitors, the housing casing and the external terminal make a current loop. A magnetic flux of an alternating magnetic field generated in a part of the electric power conversion circuit penetrates in a first area and a second area formed in the current loop. A first induced noise current is induced in the current loop when the magnetic flux of the generated magnetic field penetrates in the first area. A second induced noise current is induced in the current loop when the magnetic flux penetrates in the second area so that the first induced noise current flows in a reverse direction to the second induced noise current.