Power converter and power converter for railroad vehicle
First Claim
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1. A power converter comprising:
- a plurality of semiconductor element groups, each including a first semiconductor switching element, a second semiconductor switching element, a third semiconductor switching element, and a fourth semiconductor switching element, connected in series to each other in this order, and being configured such that each of the second semiconductor switching element and the third semiconductor switching element generates larger amount of heat than the first semiconductor switching element and the fourth semiconductor switching element; and
coolers on which the plurality of semiconductor element groups is placed, including a plurality of plate-shaped fins that extends along a first direction, which is a direction in which cooling air flows, whereinthe plurality of plate-shaped fins is disposed side by side along a second direction orthogonal to the first direction, andthe plurality of semiconductor element groups is disposed side by side along the second direction so as to overlap with the fins on surfaces of the coolers opposite to surfaces on which the fins are provided, and in each of the plurality of semiconductor element groups, the second semiconductor switching element and the third semiconductor switching element are shifted from each other in the second direction such that at least a portion of the fins with which the second semiconductor switching element overlaps as viewed in a direction orthogonal to the surfaces of the coolers is different from the fins with which the third semiconductor switching element overlaps as viewed in the direction orthogonal to the surfaces of the coolers.
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Abstract
In each of a plurality of semiconductor element groups of a power converter, a second semiconductor switching element and a third semiconductor switching element are shifted from each other in a second direction such that at least a portion of fins with which the second semiconductor switching element overlaps as viewed in a direction orthogonal to surfaces of coolers is different from fins with which the third semiconductor switching element overlaps as viewed in the direction orthogonal to the surfaces of the coolers.
11 Citations
12 Claims
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1. A power converter comprising:
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a plurality of semiconductor element groups, each including a first semiconductor switching element, a second semiconductor switching element, a third semiconductor switching element, and a fourth semiconductor switching element, connected in series to each other in this order, and being configured such that each of the second semiconductor switching element and the third semiconductor switching element generates larger amount of heat than the first semiconductor switching element and the fourth semiconductor switching element; and coolers on which the plurality of semiconductor element groups is placed, including a plurality of plate-shaped fins that extends along a first direction, which is a direction in which cooling air flows, wherein the plurality of plate-shaped fins is disposed side by side along a second direction orthogonal to the first direction, and the plurality of semiconductor element groups is disposed side by side along the second direction so as to overlap with the fins on surfaces of the coolers opposite to surfaces on which the fins are provided, and in each of the plurality of semiconductor element groups, the second semiconductor switching element and the third semiconductor switching element are shifted from each other in the second direction such that at least a portion of the fins with which the second semiconductor switching element overlaps as viewed in a direction orthogonal to the surfaces of the coolers is different from the fins with which the third semiconductor switching element overlaps as viewed in the direction orthogonal to the surfaces of the coolers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12)
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9. A power converter for a railroad vehicle, comprising:
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a plurality of semiconductor element groups each including a first semiconductor switching element, a second semiconductor switching element, a third semiconductor switching element, and a fourth semiconductor switching element connected in series to each other in this order, and being configured such that each of the second semiconductor switching element and the third semiconductor switching element generates larger amount of heat than the first semiconductor switching element and the fourth semiconductor switching element; and coolers on which the plurality of semiconductor element groups is placed, including a plurality of plate-shaped fins that extends along a first direction, which is a traveling direction of the railroad vehicle, wherein the plurality of plate-shaped fins is disposed side by side along a second direction orthogonal to the first direction, and the plurality of semiconductor element groups is disposed side by side along the second direction so as to overlap with the fins on surfaces of the coolers opposite to surfaces on which the fins are provided, and in each of the plurality of semiconductor element groups, the second semiconductor switching element and the third semiconductor switching element are shifted from each other in the second direction such that at least a portion of the fins with which the second semiconductor switching element overlaps as viewed in a direction orthogonal to the surfaces of the coolers is different from the fins with which the third semiconductor switching element overlaps as viewed in the direction orthogonal to the surfaces of the coolers.
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10. A power converter comprising:
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a plurality of semiconductor element groups, each including a first semiconductor switching element, a second semiconductor switching element, a third semiconductor switching element, and a fourth semiconductor switching element, connected in series to each other in this order; coolers on which the plurality of semiconductor element groups is placed, including a plurality of plate-shaped fins that extends along a first direction, which is a direction in which cooling air flows; a plurality of fasteners by which each of the first semiconductor switching element, the second semiconductor switching element, the third semiconductor switching element, and the fourth semiconductor switching element is attached to each of the coolers; and a heat pipe extending along the first direction, wherein the plurality of plate-shaped fins is disposed side by side along a second direction orthogonal to the first direction, the plurality of semiconductor element groups is disposed side by side along the second direction so as to overlap with the plurality of plate-shaped fins on surfaces of the coolers opposite to surfaces on which the plurality of plate-shaped fins is provided, and in each of the plurality of semiconductor element groups, the second semiconductor switching element and the third semiconductor switching element are shifted from each other in the second direction such that at least a portion of the plurality of plate-shaped fins with which the second semiconductor switching element overlaps as viewed in a direction orthogonal to the surfaces of the coolers is different from the plurality of plate-shaped fins with which the third semiconductor switching element overlaps as viewed in the direction orthogonal to the surfaces of the coolers, each of the coolers includes a base to which the plurality of plate-shaped fins is attached, and the heat pipe is provided inside the base of each of the coolers, and the plurality of fasteners is disposed side by side along the first direction, which is a direction in which the heat pipe extends.
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Specification