Electric power conversion device

Patent metadata

Field	Value
Publication number	US-10103619-B2
Application number	US-201515545762-A
Country	US
Kind code	B2
Filing date	Dec 25, 2015
Priority date	Feb 25, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

An electric power conversion device includes: an active circuit section emitting noises; an output-side filter circuit section; a chassis including a first space and a second space for housing the active circuit section and the filter circuit section respectively; and a base plate that is installed so as to cover at least the first space and is electrically connected to the chassis. Here, the chassis includes a first partition wall for partitioning the first space and the second space, the base plate is disposed so as to cover the first space, and includes a second partition wall along the first partition wall, and the second partition wall is disposed between the filter circuit section and the first partition wall in the first space.

First claim

The invention claimed is:

1. An electric power conversion device comprising:
an active circuit section emitting noises;
an output-side filter circuit section;
a chassis including a first space and a second space for housing the active circuit section and the filter circuit section respectively; and
a base plate that is installed so as to cover at least the first space and is electrically connected to the chassis,
wherein the chassis includes a first partition wall for partitioning the first space and the second space,
the base plate is disposed so as to cover the first space, and includes a second partition wall along the first partition wall, and
the second partition wall is disposed between the filter circuit section and the first partition wall in the first space, and
wherein the chassis includes a fifth partition wall that is disposed nearer to the filter circuit section than the second partition wall is disposed, and along the first partition wall.

2. The electric power conversion device according to claim 1 ,
wherein the first partition wall is integrally molded with the chassis, and
the second partition wall is integrally molded with the base plate.

3. The electric power conversion device according to claim 2 ,
wherein the base plate is fastened to the upper surface of the first partition wall with a fastening member.

4. The electric power conversion device according to claim 3 ,
wherein a fastening protrusion, to which the base plate is fastened in surface contact, is formed on the upper surface of the first partition wall.

5. The electric power conversion device according to claim 1 ,
wherein the base plate includes a third partition wall that is disposed along the first partition wall, and nearer to the active circuit section than the first partition wall.

6. The electric power conversion device according to claim 1 ,
wherein the chassis includes a side wall that is disposed along the circumference of the filter circuit section, and
the base plate includes a fourth partition wall formed along the inner surface of the side wall in the first space.

7. The electric power conversion device according to claim 6 ,
wherein the fourth partition wall is integrally molded with the base plate.

8. An electric power conversion device comprising:
a DC-DC converter circuit;
an output-side filter circuit section connected to the DC-DC converter circuit;
an inverter circuit;
a metal chassis for housing the DC-DC converter circuit, the filter circuit section, and the inverter circuit; and
a metal base plate electrically connected to the metal chassis,
wherein the chassis includes a first chassis-side partition wall for shielding the filter circuit section from the DC-DC converter and the inverter circuit, and a side wall disposed along the circumference of the filter circuit section,
the chassis is further partitioned by the first chassis-side partition wall and the side wall of the chassis, and includes a first space for housing the filter circuit section, and
the base plate is disposed so as to cover the first space, formed along the inner surface of the side wall, and includes a first base plate-side partition wall extended to the filter circuit section side,
wherein the base plate further includes a second base plate-side partition wall disposed between the first chassis-side partition wall and the DC-DC converter circuit, and
wherein the chassis further includes a second chassis-side partition wall disposed between the first chassis-side partition wall and the filter circuit section.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Fukumasu Keisuke
• Funato Hiroki
• Sobu Yuji

Classifications

• H05K5/0217

  Mechanical details of casings (covers, lids, hoods or members for covering apertures H05K5/03) · CPC title

• H05K5/04

  Metal casings · CPC title

• H02M3/33592

  having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer · CPC title

• H02M3/33576

  having at least one active switching element at the secondary side of an isolation transformer · CPC title

• H02M1/44 Primary

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