POWER CONVERSION APPARATUS

• US 20130322141A1
• Filed: 02/10/2011
• Published: 12/05/2013
• Est. Priority Date: 02/10/2011
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Kobayashi, Tomohiro, Yamamoto, Takeshi, Mamoto, Yasuaki, Nakashima, Yukio, Sakamoto, Kohei
• Granted Patent: US 9,270,199 B2
• Time in Patent Office: Days
• US Class Current: 363/123
• CPC Class Codes: H02G 5/005 Laminated bus-bars
• CPC Class Codes: H02G 5/10 Cooling
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02M 7/537 using semiconductor devices only, e.g. single switched pulse inverters
• CPC Class Codes: H02M 7/5387 in a bridge configuration
• CPC Class Codes: H05K 7/14329 specially adapted for the configuration of power bus bars
• CPC Class Codes: H05K 7/209 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20909 takes precedence
• CPC Class Codes: H05K 7/20918 the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels

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.

Claims

1. A power conversion apparatus having a configuration in which 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,

wherein the laminated bus bar, in which a plurality of connection conductors are laminated through an insulator, has a heat radiating portion formed by exposing a conductor in a part of an area other than respective areas connecting to the semiconductor device module and the filter capacitor, and

every surface of the exposed conductor of the heat radiating portion is formed to be along a vertical direction.

3. 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.

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

5. The power conversion apparatus according to claim 4, 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.

6. 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.

7. 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.

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

2. (canceled)