Power converter including filter circuit device to improve a noise suppression function

Patent metadata

Field	Value
Publication number	US-11798749-B2
Application number	US-201816965981-A
Country	US
Kind code	B2
Filing date	Dec 26, 2018
Priority date	Feb 2, 2018
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A filter circuit device includes: first and second core members forming first and second through holes, respectively; a first conductor passing through the first and second through holes; a second conductor passing through the first and second through holes; a capacitor; a first terminal configured to electrically connect the first conductor with the capacitor; and a second terminal configured to electrically connect the second conductor with the capacitor. The first conductor from the first through hole to the second through hole and the second conductor from the first through hole to the second through hole have an opposing part between the first conductor and the second conductor. The first terminal presses an opposite surface of the first conductor, so as to be in contact with the first conductor. The second terminal presses an opposite surface of the second conductor, so as to be in contact with the second conductor.

First claim

The invention claimed is:

1. A filter circuit device comprising:
a first core member configured to form a first through hole;
a second core member configured to form a second through hole;
a first conductor configured to pass through the first through hole and the second through hole;
a second conductor configured to pass through the first through hole and the second through hole;
a capacitor;
a first terminal configured to electrically connect the first conductor with the capacitor; and
a second terminal configured to electrically connect the second conductor with the capacitor,
wherein
the first conductor from the first through hole to the second through hole and the second conductor from the first through hole to the second through hole have an opposing part between the first conductor and the second conductor,
the first terminal presses an opposite surface of the first conductor, the opposite surface opposite to an opposing surface of the first conductor, in order to be in contact with the first conductor, and
the second terminal presses an opposite surface of the second conductor, the opposite surface opposite to an opposing surface of the second conductor, in order to be in contact with the second conductor.

2. The filter circuit device according to claim 1 , further comprising:
a first pressing member configured to press the first terminal to the first conductor; and
a second pressing member configured to press the second terminal to the second conductor.

3. The filter circuit device according to claim 1 ,
wherein
when seen from a direction perpendicular to the opposing surface of the first conductor, the first terminal and the second terminal are disposed where the first terminal and the second terminal do not to overlap each other, and
the capacitor is disposed where the capacitor is sandwiched between the first terminal and the second terminal.

4. The filter circuit device according to claim 1 , wherein
the first terminal includes: a first capacitor-side terminal that is provided at a side closer to the capacitor; and a first conductor-side terminal that is formed of a different member from the first capacitor-side terminal and is in contact with the first conductor, and
the second terminal includes: a second capacitor-side terminal that is provided at a side closer to the capacitor; and a second conductor-side terminal that is formed of a different member from the second capacitor-side terminal and is in contact with the second conductor.

5. The filter circuit device according to claim 4 , further comprising a resin fixing part configured to support the first core member, the second core member, the first conductor, the second conductor, the first conductor-side terminal, and the second conductor-side terminal.

6. A power converter including the filter circuit device according to claim 1 ,
the power converter comprising:
a power semiconductor module configured to convert DC power into AC power; and
a capacitor module configured to smooth the DC power,
wherein
the filter circuit device removes noise of the DC power supplied to the capacitor module.

7. The power converter according to claim 6 , further comprising:
a housing configured to form space for accommodating the power semiconductor module and the filter circuit device; and
a cover configured to be disposed in space between the power semiconductor module and the filter circuit device and configured to be connected to the housing.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Okubo Yutaka
• Funato Hiroki
• Yamai Hiroyuki
• Kim Taesung

Classifications

• H03H7/0115 Primary

  comprising only inductors and capacitors (H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence) · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• H01F27/40

  Structural association with built-in electric component, e.g. fuse · CPC title

• H02M1/44

  Circuits or arrangements for compensating for electromagnetic interference in converters or inverters · CPC title