Power conversion device

Patent metadata

Field	Value
Publication number	US-10079552-B2
Application number	US-201715790805-A
Country	US
Kind code	B2
Filing date	Oct 23, 2017
Priority date	Dec 22, 2016
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A power conversion device including: a first capacitor and a second capacitor which are connected to each other in series; a plurality of first power semiconductor modules having terminals disposed on one surface; a plurality of second power semiconductor modules having terminals disposed on one surface; and a laminated bus bar connecting the first capacitor and the second capacitor and the plurality of modules, wherein the first power semiconductor modules and the second power semiconductor modules are disposed in such a manner that their respective output terminals face each other in a disposition direction of the terminals, and in the laminated bus bar, an output bus bar connecting the output terminals of the first power semiconductor modules and the second power semiconductor modules to each other is held in an insulated manner in an opening portion provided to the intermediate bus bar.

First claim

The invention claimed is:

1. A power conversion device comprising:
a first capacitor and a second capacitor which are connected to a direct current power supply in series;
a plurality of first power semiconductor modules incorporating a series circuit of a first semiconductor device and a second semiconductor device in which a positive electrode terminal, a negative electrode terminal, and an output terminal are disposed on one surface;
a plurality of second power semiconductor modules incorporating a bi-directional semiconductor device in which an intermediate terminal and an output terminal are disposed on one surface; and
a laminated bus bar connecting terminals of the first capacitor and the second capacitor and the terminals of the plurality of first power semiconductor modules and the plurality of second power semiconductor modules,
wherein the first power semiconductor modules and the second power semiconductor modules are disposed in such a manner that the respective output terminals face each other in a disposition direction of the terminals,
the laminated bus bar is formed by laminating a positive electrode bus bar which connects the first capacitor and the positive electrode terminals of the first power semiconductor modules to a positive electrode of the direct current power supply, the negative electrode bus bar which connects the second capacitor and the negative electrode terminals of the first power semiconductor modules to a negative electrode of the direct current power supply, and an intermediate bus bar which connects connection points of the first capacitor and the second capacitor and the intermediate terminals of the second power semiconductor modules, with the insulation films respectively therebetween, and
an output bus bar connecting the output terminals of the first power semiconductor modules and the second power semiconductor modules to each other is held in an insulated manner in an opening portion provided to the intermediate bus bar.

2. The power conversion device according to claim 1 , wherein the intermediate bus bar is disposed between the positive electrode bus bar and the negative electrode bus bar.

3. The power conversion device according to claim 1 , wherein the laminated bus bar includes a laminate bus bar.

4. The power conversion device according to claim 1 , wherein the first power semiconductor modules and the second power semiconductor modules are respectively disposed in a staggered manner on a mounting surface of a cooling body.

5. The power conversion device according to claim 1 , wherein a mounting surface of the cooling body is provided with a first module row at which the first power semiconductor modules and the second power semiconductor modules are alternately aligned and a second module row at which at positions facing the first power semiconductor modules at the first module row, the second power semiconductor modules are disposed and at positions facing the second power semiconductor modules, the first power semiconductor modules are disposed.

6. The power conversion device according to claim 1 , wherein a mounting surface of a cooling body is provided with a first module row at which the plurality of first power semiconductor modules are disposed to be aligned and a second module row at which at positions facing the first power semiconductor modules at the first module row, the plurality of second power semiconductor modules are disposed to be aligned.

7. The power conversion device according to claim 1 , wherein three sets of an output arm including the first power semiconductor module and the second power semiconductor module are connected to each other to form a three-level three-phase inverter.

8. The power conversion device according to claim 7 , wherein the output arm is formed by connecting the plurality of first power semiconductor modules and second power semiconductor modules to each other in parallel.

9. The power conversion device according to claim 1 , wherein at least one of the first semiconductor device, the second semiconductor device, and the bi-directional semiconductor device is configured to include a wide band gap semiconductor element.

Assignees

• Fuji Electric Co Ltd

Inventors

• Kadota Yasunobu

Classifications

• H02M7/483

  Converters with outputs that each can have more than two voltages levels · CPC title

• H02M7/003 Primary

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