POWER CONVERSION APPARATUS WITH BUS BAR

• US 20090015992A1
• Filed: 01/29/2007
• Published: 01/15/2009
• Est. Priority Date: 02/17/2006
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Yaskawa Denki
• Original Assignee: Kabushiki Kaisha Yaskawa Denki
• Inventors: Mori, Toshihiro, Hara, Hidenori, Nohara, Shuhei
• Granted Patent: US 7,869,193 B2
• Time in Patent Office: Days
• US Class Current: 361/624
• CPC Class Codes: H02M 5/271 from a three phase input voltage
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H05K 7/14329 specially adapted for the configuration of power bus bars

Abstract

The connection between the terminals of three-phase electric parts used in a matrix converter is simplified to thereby reduce the inductance between conductors.

An AC capacitor (10) and an IGBT (20) are disposed such that the linearly arranged terminals (11) of the AC capacitor (10) and the linearly arranged input terminals (21) of the IGBT (20) are parallel to each other, and also that the three terminals of the AC capacitor (10) and the three input terminals of the IGBT (20) are situated close to each other. A bus bar is formed as a laminate bus bar (100) which can be provided by laminating three plate-shaped bus bars on top of each other. In the respective plate-shaped bus bars, there are provided internal terminals for connecting together the mutually adjoining ones of the three-portion terminals of the AC capacitor (10) and the three-portion input terminals of the IGBT (20), and the mutually adjoining terminals are connected together through the internal terminals.

Claims

1. A matrix converter comprising:

an AC capacitor including linearly arranged first, second and third terminals respectively formed in the three portions thereof;

an IGBT including linearly arranged first, second and third input terminals respectively formed in the three portions thereof; and

a bus bar for connecting together the three-portion terminals of the AC capacitor and the three-portion input terminals of the IGBT, wherein

the AC capacitor and the IGBT are disposed such that the linearly arranged terminals of the AC capacitor and the linearly arranged input terminals of the IGBT are parallel to each other and the first, second and third input terminals of the IGBT are respectively close to the first, second and third terminals of the AC capacitor, and

the bus bar is formed as a laminate bus bar provided in such a manner that three plate-shaped bus bars are laminated on top of each other and insulators are inserted between the respective bus bars as well as on the front and back surfaces of the bus bars,

in the respective plate-shaped bus bars, there are provided internal terminals for connecting together the three-portion terminals of the AC capacitor and the three-portion input terminals of the IGBT, and

the terminals of the AC capacitor and the input terminals of the IGBT are connected together through the internal terminals.

2. The matrix converter as set forth in claim 1, wherein

the AC capacitor and the IGBT are disposed such that the surfaces of the three-portion terminals of the AC capacitor and the surfaces of the three-portion input terminals of the IGBT are on the same plane, and

the three plate-shaped bus bars are respectively formed to have the same substantially rectangular shape and are laminated on top of each other.

3. The matrix converter as set forth in claim 2, wherein

in the three plate-shaped bus bars, there are formed hole portions which respectively penetrate through between the first terminal and the first input terminal and through between the third terminal and the third input terminal, and

a current route formed between the first terminal and the first input terminal and detouring the hole portions, and a current route formed between the third terminal and the third input terminal and detouring the hole portions are respectively set to substantially overlap a current route formed between the second terminal and the second input terminal.

4. The matrix converter as set forth in claim 1, wherein

the AC capacitor and the IGBT are disposed such that the surfaces of the three-portion terminals of the AC capacitor and the surfaces of the three-portion input terminals of the IGBT are on the same plane, and

the three plate-shaped bus bars are laminated on top of each other in such a manner that the centrally situated bus bar is formed to have a substantially rectangular shape, the remaining two bus bars are formed to have substantially U-like shapes respectively facing in the mutually opposite directions, the two substantially U-shaped bus bars holding the substantially rectangular shaped bus bar between thereof through the insulators.

5. The matrix converter as set forth in claim 1, wherein

the AC capacitor and the IGBT are disposed such that the surfaces of the three-portion terminals of the AC capacitor and the surfaces of the three-portion input terminals of the IGBT are substantially perpendicular to each other, and

the three plate-shaped bus bars are formed in part to have a substantially right angle.