Power conversion apparatus with a laminated bus bar comprising an exposed heat radiating portion

Patent metadata

Field	Value
Publication number	US-9270199-B2
Application number	US-201113984216-A
Country	US
Kind code	B2
Filing date	Feb 10, 2011
Priority date	Feb 10, 2011
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A filter capacitor accumulating direct-current power and a semiconductor device module performing a switching operation that converts the direct-current power accumulated in the filter capacitor to alternating-current power are electrically connected with each other through a laminated bus bar. The laminated bus bar has a first bus bar and a second bus bar in which a plurality of connection conductors are laminated through an insulator. The second bus bar is provided with heat radiating portions that are formed by exposing a part of the conductor in each flat plate surface.

First claim

The invention claimed is:

1. A power conversion apparatus comprising:
a filter capacitor accumulating direct-current power;
a semiconductor device module performing a switching operation that converts the direct-current power accumulated in the filter capacitor to alternating-current power; and
a laminated bus bar electrically connecting the filter capacitor and the semiconductor device module,
wherein the laminated bus bar comprises:
a bus bar in which a plurality of conductors are laminated through an insulator;
an external laminate material coating an external surface of the bus bar;
connection portions electrically connected to the semiconductor device module and the filter capacitor; and
a heat radiating portion in which the external laminate material is not provided and a conductor of the bus bar is exposed to air, and
wherein every surface of the exposed conductor of the heat radiating portion is formed to be along a vertical direction.

2. The power conversion apparatus according to claim 1 , wherein a surface of the exposed conductor of the heat radiating portion is formed on a surface of a flat plate of the laminated bus bar.

3. The power conversion apparatus according to claim 2 , wherein every surface of the flat plate of the laminated bus bar is a surface along a vertical direction.

4. The power conversion apparatus according to claim 3 , wherein the laminated bus bar has a first bus bar electrically connected to the semiconductor device module and a second bus bar electrically connected to the filter capacitor, and the first bus bar and the second bus bar are formed separately.

5. The power conversion apparatus according to claim 1 , wherein a heat radiating fin is provided on a part or whole of the heat radiating portion.

6. The power conversion apparatus according to claim 1 , wherein a switching device provided in the semiconductor device module is formed based on a wide band-gap semiconductor.

7. The power conversion apparatus according to claim 6 , wherein the wide band-gap semiconductor is a semiconductor using silicon carbide, a gallium nitride material, or diamond.

Assignees

• Kobayashi Tomohiro
• Sakamoto Kohei
• Yamamoto Takeshi
• Mamoto Yasuaki
• Nakashima Yukio
• Mitsubishi Electric Corp

Inventors

• Kobayashi Tomohiro
• Sakamoto Kohei
• Yamamoto Takeshi
• Mamoto Yasuaki
• Nakashima Yukio

Classifications

• H02G5/10

  Cooling · CPC title

• H02M7/537 Primary

  using semiconductor devices only, e.g. single switched pulse inverters · CPC title

• H02M7/003 Primary

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H02M7/5387

  in a bridge configuration · CPC title

• H02G5/005

  Laminated bus-bars · CPC title