Power converter

Abstract

To provide a power conversion device that reduces an amount of heat generated in a bus bar.SOLUTION: A power conversion device 6 includes a power card 24, a cooler 21, input terminals 60P and 60N, a capacitor 30, input bus bars 61P and 61N, a current detection unit 40, output terminals 70U, 70V, and 70W, and output bus bars 71U, 71V, and 71W. The power card 24 is divided into an input side area Ain and an output side area Aout by a virtual surface VS perpendicular to a direction in which a P terminal 24P, an N terminal 24N, and an O terminal 24O are arranged. The input side area Ain is an area including the P terminal 24P and the N terminal 24N, and the output side area Aout is an area including the O terminal 24O. The plurality of input terminals 60P and 60N are arranged on the input side area Ain together with the capacitor 30. The plurality of output terminals 70U, 70V, and 70W are arranged on the output side area Aout together with the current detection unit 40.SELECTED DRAWING: Figure 2

Claims

1. Multiple semiconductor modules (24) containing semiconductor elements and arranged in a predetermined direction, An input terminal (60P, 60N) is electrically connected to an external battery (2) and powered by the battery, A capacitor (30) is electrically connected in parallel to multiple semiconductor modules and the battery, and smooths the voltage pulsation of the power supplied from the input terminal, A current detection unit (40) for detecting the magnitude of the alternating current output from the semiconductor module, It is electrically connected to an external motor (3) and includes an output terminal (70U, 70V, 70W) that outputs the AC current to the motor, The semiconductor module has a P terminal (24P) electrically connected to the high-potential side of the capacitor, an N terminal (24N) electrically connected to the low-potential side of the capacitor, and an O terminal (24O) electrically connected to the current detection unit. Of the regions divided into two by a virtual plane (VS) perpendicular to the direction in which the semiconductor modules and capacitors are arranged, the region containing the P terminals and N terminals of the multiple semiconductor modules is defined as the input region (Ain), and the region containing the O terminals of the multiple semiconductor modules is defined as the output region (Aout). Multiple input terminals are arranged in the input-side region together with the capacitors. Multiple output terminals are arranged in the output region together with the current detection unit. A power converter wherein at least one of the P terminal, the N terminal, and the O terminal has a portion that extends perpendicularly to both the predetermined direction and the direction in which they are aligned.

2. A plurality of semiconductor modules (24) having semiconductor elements built in and arranged in a predetermined direction, An input terminal (60P, 60N) is electrically connected to an external battery (2) and powered by the battery, A capacitor (30) is electrically connected in parallel to multiple semiconductor modules and the battery, and smooths the voltage pulsation of the power supplied from the input terminal, A current detection unit (40) for detecting the magnitude of the alternating current output from the semiconductor module, It is electrically connected to an external motor (3) and includes an output terminal (70U, 70V, 70W) that outputs the AC current to the motor, The semiconductor module has a P terminal (24P) electrically connected to the high-potential side of the capacitor, an N terminal (24N) electrically connected to the low-potential side of the capacitor, and an O terminal (24O) electrically connected to the current detection unit. Of the region divided into two by a virtual plane (VS) perpendicular to the direction in which the P terminal or the N terminal and the O terminal are aligned, the region containing the P terminal and the N terminal of the multiple semiconductor modules is defined as the input region (Ain), and the region containing the O terminal of the multiple semiconductor modules is defined as the output region (Aout). Multiple input terminals are arranged in the input-side region together with the capacitors. Multiple output terminals are arranged in the output region together with the current detection unit. A power converter wherein at least one of the P terminal, the N terminal, and the O terminal has a portion that extends perpendicularly to both the predetermined direction and the direction in which they are aligned.

3. The power conversion device according to claim 1 or 2, wherein the P terminal, the N terminal, and the O terminal each have portions that extend perpendicularly to both the predetermined direction and the direction in which they are aligned.

4. A case (10) housing the semiconductor module, the capacitor, and the current detection unit, The power conversion device according to any one of claims 1 to 3, wherein the opening of the case on which the input terminals are located and the opening of the case on which the output terminals are located are provided in a wall portion of the case that extends in the direction in which they are aligned.

5. A case (10) housing the semiconductor module, the capacitor, and the current detection unit, The power conversion device according to any one of claims 1 to 3, wherein the opening of the case on which the input terminals are located and the opening of the case on which the output terminals are located are provided in a wall portion located on one and the same side with respect to the semiconductor module.

6. A case (10) housing the semiconductor module, the capacitor, and the current detection unit, The power conversion device according to any one of claims 1 to 3, wherein the opening of the case on which the input terminals are located and the opening of the case on which the output terminals are located are provided in the walls on both sides of the semiconductor module.

7. A case (10) housing the semiconductor module, the capacitor, and the current detection unit, The opening of the case on which the output terminals are arranged is provided in a wall portion that is positioned to overlap in the direction of alignment with the projection of the capacitor in the direction of alignment with the semiconductor module. The power conversion device according to any one of claims 1 to 3, wherein the opening of the case on which the output terminals are located and the opening of the case on which the input terminals are located are provided in the walls of the case that are perpendicular to each other.

8. A plurality of semiconductor modules (24) having semiconductor elements built in and arranged in a predetermined direction, An input terminal (60P, 60N) is electrically connected to an external battery (2) and powered by the battery, A capacitor (30) is electrically connected in parallel to multiple semiconductor modules and the battery, and smooths the voltage pulsation of the power supplied from the input terminal, A current detection unit (40) for detecting the magnitude of the alternating current output from the semiconductor module, An output terminal (70U, 70V, 70W) is electrically connected to an external motor (3) and outputs the AC current to the motor, The device comprises a case (10) housing the semiconductor module, the capacitor, and the current detection unit, The semiconductor module has a P terminal (24P) electrically connected to the high-potential side of the capacitor, an N terminal (24N) electrically connected to the low-potential side of the capacitor, and an O terminal (24O) electrically connected to the current detection unit. Of the regions divided into two by a virtual plane (VS) perpendicular to the direction in which the semiconductor modules and capacitors are arranged, the region containing the P terminals and N terminals of the multiple semiconductor modules is defined as the input region (Ain), and the region containing the O terminals of the multiple semiconductor modules is defined as the output region (Aout). Multiple input terminals are arranged in the input-side region together with the capacitors. Multiple output terminals are arranged in the output region together with the current detection unit. The opening of the case on which the output terminals are arranged is provided in a wall portion that is positioned to overlap in the direction of alignment with the projection of the capacitor in the direction of alignment with the semiconductor module. A power converter in which the opening of the case where the output terminals are located and the opening of the case where the input terminals are located are provided on the wall portion of the case that is perpendicular to each other.

9. The capacitor and the input terminal are electrically connected by input busbars (61P, 61N), The power conversion device according to any one of claims 1 to 8, wherein the input busbar extends with an L-shaped bend from the connection point with the capacitor to the connection point with the input terminal.

10. comprising a metal cooler (21) for cooling a plurality of semiconductor modules, The power conversion device according to any one of claims 1 to 9, wherein the cooler has a single-sided cooling structure that cools by contacting one side of the semiconductor module.

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