Bus bar structure and power conversion device using same
AssigneeMitsubishi Electric Corporation
InventorsTetsuya MATSUDA, Shigeto FUJITA, Tetsuo MOTOMIYA
Life of this patent
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Abstract
There has been a problem that a chip or a power module is broken by a repulsive electromagnetic force between positive and negative bus bars and an arc is generated, so that the failure is escalated. Therefore, positive and negative bus bars connecting two devices are configured so as to form a one-turn-loop current path, thereby suppressing a repulsive electromagnetic force occurring between the bus bars and decreasing a possibility of occurrence of an arc at the power module.
Claims15
A bus bar structure connected between a first device and a second device and comprising a first bus bar and a second bus bar arranged so as to be opposed to each other in a direction of a y axis perpendicular to a direction of an x axis, the direction of the x axis being a connection direction between the first device and the second device, wherein
- with a direction of a z axis defined as a direction perpendicular to the direction of the x axis and the direction of the y axis, the first bus bar includes:
- a first connection portion connected to the first device via a first end and extending in a positive direction of the z axis from the first end;
- a first bent portion bent in a positive direction of the x axis with respect to the first connection portion;
- and
- a second connection portion bent in a negative direction of the z axis with respect to the first bent portion and connected to the second device,
- the second bus bar includes:
- a third connection portion connected to the first device via a second end and extending in the negative direction of the z axis from the second end;
- a second bent portion bent in the positive direction of the x axis with respect to the third connection portion;
- and
- a fourth connection portion bent in the positive direction of the z axis with respect to the second bent portion and connected to the second device,
- the first bent portion and the second bent portion are arranged at positions shifted from each other in the direction of the z axis,
- an opening is formed which is surrounded by the first connection portion, the first bent portion, the second connection portion, the third connection portion, the second bent portion, and the fourth connection portion, and
- the connection to the first device and the second device is made such that a direction of current flowing from the first device via the first bus bar to the second device and a direction of current flowing from second device via the second bus bar to the first device are opposite to each other.
(canceled)
Dependencies are inferred from the claim text.