Laminated bus bar

• US 20110308834A1
• Filed: 03/03/2011
• Published: 12/22/2011
• Est. Priority Date: 06/18/2010
• Status: Active Grant

• Current Assignee: Fuji Electric Company Limited (Fuji Electric Systems Company Limited)
• Original Assignee: Fuji Electric Holdings Company Limited (Fuji Electric Systems Company Limited)
• Inventors: Takahashi, Kiyoshi
• Granted Patent: US 8,436,244 B2
• Time in Patent Office: Days
• US Class Current: 174/68.2
• CPC Class Codes: H02G 5/005 Laminated bus-bars
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02M 7/487 Neutral point clamped inverters
• CPC Class Codes: H05K 7/14329 specially adapted for the configuration of power bus bars

Abstract

A laminated bus bar is applied to a main wiring circuit of an electric power converter and connected to a semiconductor module. The laminated bus bar includes insulator plates laminated together, and conductors interposed between the insulator plates. Each conductor includes a connection terminal section led out in accordance with an arrangement of a main circuit terminal on the semiconductor module. A creepage groove is formed on an edge of each of the insulator plates in accordance with a position between the connection terminal sections. The laminated bus bar facilitates elongation of the creepage distance between the connection terminals.

Claims

1. A laminated bus bar applied to a main wiring circuit of an electric power converter and connected to a semiconductor module, comprising:

insulator plates laminated together, and

conductors interposed between the insulator plates, each conductor including a connection terminal section led out in accordance with an arrangement of a main circuit terminal on the semiconductor module,

wherein a creepage groove. is formed on an edge of each of the insulator plates in accordance with a position between the connection terminal sections.

2. The laminated bus bar according to claim 1, wherein the creepage groove is parallel-sided, and the groove of creepage has an opening width set to be equal to or more than 2.5 mm wide.

3. The laminated bus bar according to claim 1, wherein the insulator plates include a terminal window having two side edges arranged parallel to each other, the conductors being arranged parallel to each other between the side edges so that the conductors do not overlap each other, wherein the creepage groove is formed in the insulator plates between the conductors.

4. The laminated bas bar according to claim 3, wherein the creepage groove on one side of the side edge faces the creepage groove on the other side of the side edge.