Power conversion device

Patent metadata

Field	Value
Publication number	US-9282685-B2
Application number	US-201314373081-A
Country	US
Kind code	B2
Filing date	Jan 7, 2013
Priority date	Jan 23, 2012
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

Flux concentration cores that encircle bus bars are arranged at different heights. When viewed from an extending direction (a Z-direction) of the bus bars, the first flux concentration core and the second flux concentration core that are adjacent to one another partially overlap each other, and the second flux concentration core and the third flux concentration core that are adjacent to each other partially overlap each other. Therefore, the flux concentration cores are able to be arranged around the bus bars even when the spaces between the bus bars are narrow.

First claim

The invention claimed is:

1. A power conversion device comprising:
a plurality of bus bars including a first bus bar and a second bus bar that are adjacent to each other, and that extend parallel to each other;
a first flux concentration core that has a first end portion and a second end portion and encircles the first bus bar with the first end portion facing the second end portion across a first gap;
a second flux concentration core that has a first end portion and a second end portion and encircles the second bus bar with the first end portion facing the second end portion across a second gap;
a first magnetic sensor that is arranged in the first gap of the first flux concentration core;
a second magnetic sensor that is arranged in the second gap of the second flux concentration core;
a terminal block;
a case with an opening;
a connector;
power conversion semiconductor modules;
cooling panels for the power conversion semiconductor modules;
a coolant inlet pipe; and
a coolant outlet pipe,
wherein when viewed from a direction orthogonal to an extending direction of the bus bars, a position in the extending direction where the first flux concentration core is arranged is different than a position in the extending direction where the second flux concentration core is arranged,
when viewed from the extending direction of the bus bars, the first flux concentration core and the second flux concentration core partially overlap with each other,
the plurality of bus bars include a first bus bar group and a second bus bar group;
terminals of the bus bars in the first bus bar group and terminals of the bus bars in the second bus bar group are lined up and fixed to the terminal block;
the first flux concentration core is included in a first flux concentration core group;
the second flux concentration core is included in a second flux concentration core group;
the first flux concentration core group and the second flux concentration core group are arranged adjacent to the terminal block;
the first bus bar group, the second bus bar group, the first flux concentration core group, the second flux concentration core group, the terminals of the bus bars of the first bus bar group, the terminals of the bus bars of the second bus bar group, and the terminal block are housed within the case;
the terminals fixed to the terminal block face the opening;
the connector is fixed to the case when the connector is passed through the opening and connected to the terminals; and
the power conversion semiconductor modules are sandwiched between adjacent cooling panels for the power conversion semiconductor modules.

2. The power conversion device according to claim 1 , wherein
the first gap and the second gap are arranged within the same plane;
the first magnetic sensor and the second magnetic sensor are mounted on a common circuit board;
the first magnetic sensor is arranged on the second flux concentration core side in the extending direction of the first bus bar in the first gap, when viewed from a direction orthogonal to the extending direction of the first bus bar and orthogonal to a width direction of the first bus bar; and
the second magnetic sensor is arranged on the first flux concentration core side in the extending direction of the second bus bar in the second gap, when viewed from a direction orthogonal to the extending direction of the second bus bar and orthogonal to a width direction of the second bus bar.

3. The power conversion device according to claim 2 , wherein
the first magnetic sensor and the second magnetic sensor have the same specifications;
the first magnetic sensor includes a first magnetic sensory portion;
the second magnetic sensor includes a second magnetic sensory portion;
the first magnetic sensory portion is provided on the first flux concentration core side of the first magnetic sensor, when viewed from the direction orthogonal to the extending direction of the first bus bar and orthogonal to the width direction of the first bus bar; and
the second magnetic sensory portion is provided on the second flux concentration core side of the second magnetic sensor, when viewed from the direction orthogonal to the extending direction of the second bus bar and orthogonal to the width direction of the second bus bar.

4. The power conversion device according to claim 1 , further comprising a third flux concentration core,
wherein the plurality of bus bars includes a third bus bar;
the third flux concentration core has a first end portion and a second end portion and encircles the third bus bar with the first end portion facing the second end portion across a third gap;
the first bus bar, the second bus bar and the third bus bar are arranged parallel to each other;
the second bus bar is provided between the first bus bar and the third bus bar;
a position of the first flux concentration core in the extending direction and a position of the third flux concentration core in the extending direction are equivalent, while a position of the second flux concentration core in the extending direction is offset with respect to the position of the first flux concentration core in the extending direction and the position of the third flux concentration core in the extending direction, when viewed from the direction orthogonal to the extending direction of the bus bars and orthogonal to the width direction of the bus bars; and
the first flux concentration core and the second flux concentration core partially overlap with each other and the second flux concentration core and the third flux concentration core partially overlap with each other, when viewed from the extending direction of the bus bars.

5. The power conversion device according to claim 1 , wherein the first bus bar group is a set of three bus bars for three-phase alternating current, and the second bus bar group is a set of three bus bars for three-phase alternating current; the six bus bars of the first bus bar group and the second bus bar group are arranged in line; the first bus bar group includes the first bus bar; and the second bus bar group includes the second bus bar.

Assignees

• Seo Yusuke
• Hotta Yutaka
• Toyota Motor Co Ltd
• Aisin Aw Co

Inventors

• Seo Yusuke
• Hotta Yutaka

Classifications

• G01R15/207 Primary

  Constructional details independent of the type of device used · CPC title

• H05K7/14

  Mounting supporting structure in casing or on frame or rack · CPC title

• H02G5/00

  Installations of bus-bars · CPC title

• H05K7/2089 Primary

  for power electronics, e.g. for inverters for controlling motor · CPC title