Power conversion apparatus

Abstract

A power conversion apparatus comprising a base 110 which includes a first fixation portion 110a and a second fixation portion 110b that are coupled to each other at a desired angle, wherein power modules IPM1, IPM2 and IPM3 are fixed on the first fixation portion 110a of the base 110, a control circuit board 10 is fixed with its first principal surface 10a held in direct or indirect touch with the second fixation portion 110b of the base 110, and components constituting a control circuit are packaged on the second principal surface 10b of the control circuit board 10. Owing to the configuration, a versatility for the installation of the power conversion apparatus on a vehicle becomes high, the vibration-proofness of the control circuit board is enhanced, and heats generated by the electronic components, etc. packaged on the control circuit board are sufficiently emitted.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an explanatory diagram showing the schematic circuit arrangement of a power conversion apparatus according to Embodiment 1 of this invention;

FIG. 2 is a plan view of the power conversion apparatus according to Embodiment 1 of this invention;

FIG. 3 is a side view of the power conversion apparatus according to Embodiment 1 of this invention;

FIG. 4 is a plan view of a power conversion apparatus according to Embodiment 2 of this invention;

FIG. 5 is a side view of the power conversion apparatus according to Embodiment 2 of this invention;

FIG. 6 is a plan view of a power conversion apparatus according to Embodiment 3 of this invention; and

FIG. 7 is a side view of the power conversion apparatus according to Embodiment 3 of this invention.

Claims

1. A power conversion apparatus comprising power modules which include semiconductor elements constituting a power conversion circuit for converting powers between DC and AC, a control circuit board on which components constituting a control circuit for driving and controlling said semiconductor elements are packaged, bus bars which connect said power conversion circuit and an external equipment, and a base on which, at least, said power modules and said control circuit board are fixed; wherein said base includes a first fixation portion and a second fixation portion which are coupled to each other at a desired angle, said power modules are fixed on said first fixation portion of said base, said control circuit board is fixed with its first principal surface held in direct or indirect touch with said second fixation portion of said base, and said components are packaged on a second principal surface of said control circuit board.

2. A power conversion apparatus as defined in claim 1, further comprising terminal members which transfer signals between said control circuit board and said power modules, wherein said terminal members include crooked portions which absorb mechanical displacements of said terminal members.

3. A power conversion apparatus as defined in claim 2, wherein said crooked portions are formed in said terminal members by a working method other than bending.

4. A power conversion apparatus as defined in claim 2, wherein said terminal members are formed in a plurality of arrays, and said terminal members are unitarily fixed to one another through electrically insulating members.

5. A power conversion apparatus as defined in claim 2, wherein said terminal members are packaged and fixed on said control circuit board.

6. A power conversion apparatus as defined in claim 2, wherein said terminal members are electrically connected to signal electrode terminals provided on said power modules, by at least one of brazing, soldering and welding.

7. A power conversion apparatus as defined in claim 1, wherein said control circuit board is fixed to said second fixation portion of said base by at least either of an adhesive and screws.

8. A power conversion apparatus comprising a plurality of pairs of power modules which include semiconductor elements constituting a power conversion circuit for converting powers between DC and AC, a plurality of control circuit boards on which components constituting control circuits for driving and controlling said semiconductor elements are packaged, bus bars which connect said power conversion circuit and an external equipment, and a base on which, at least, said power modules and said control circuit boards are fixed; wherein said base includes a first fixation portion, a second fixation portion which is coupled to one end of said first fixation portion, and a third fixation portion which is coupled to the other end of said first fixation portion; said first fixation portion and said second fixation portion, and said first fixation portion and said third fixation portion are respectively coupled to each other at desired angles; said plurality of pairs of power modules are fixed on said first fixation portion of said base; at least one of said plurality of control circuit boards is fixed with its first principal surface held in direct or indirect touch with said second fixation portion of said base; said components are packaged on a second principal surface of said at least one control circuit board; at least one other control circuit board is fixed with its first principal surface held in direct or indirect touch with said third fixation portion of said base; and said components are packaged on a second principal surface of said at least one other control circuit board.

9. A power conversion apparatus as defined in claim 8, further comprising terminal members which transfer signals between said control circuit boards and said power modules, wherein said terminal members include crooked portions which absorb mechanical displacements of said terminal members.

10. A power conversion apparatus as defined in claim 9, wherein said crooked portions are formed in said terminal members by a working method other than bending.

11. A power conversion apparatus as defined in claim 9, wherein said terminal members are formed in a plurality of arrays, and said terminal members are unitarily fixed to one another through electrically insulating members.

12. A power conversion apparatus as defined in claim 9, wherein said terminal members are packaged and fixed on said control circuit boards.

13. A power conversion apparatus as defined in claim 9, wherein said terminal members are electrically connected to signal electrode terminals provided on said power modules, by at least one of brazing, soldering and welding.

14. A power conversion apparatus as defined in claim 8, wherein said control circuit boards are respectively fixed to said second fixation portion and third fixation portion of said base by at least either of adhesives and screws.