Power Converter and In-Car Electrical System
1 Assignment
0 Petitions
Accused Products
Abstract
Downsizing, cost reduction, and a low inductance of an input/output circuit are to be achieved with a power converter in which a multilayer board having a power semiconductor module 500 and busbars 11, 12 is modularized. The positive busbar 11 and the negative busbar 12 for feeding main circuit current are provided on a surface of the multilayer board 100 on which a control device 10a is mounted. The positive busbar 11 and the negative busbar 12 are formed to be thicker that the metal layer wiring in each layer of the multilayer board 100. The positive busbar 11 is electrically connected to the 2nth layer wiring (n represents a positive integer) from the positive surface wiring of the multilayer board 100, and the negative busbar 12 to the 2n+1th layer wiring opposite to the 2nth layer wiring of the multilayer board 100, through via holes. As a result, current flows into the power semiconductor module 500 in opposite directions through the 2nth layer wiring and the 2n+1th layer wiring. Thus the inductance of the main circuit is reduced, and downsizing and cost reduction of the high-output power converter energized by a large current can be achieved.
44 Citations
25 Claims
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1-11. -11. (canceled)
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12. A power converter, comprising:
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a power semiconductor module on which a power semiconductor device is mounted; a control device for controlling the power semiconductor module; a multilayer board for mounting the control device; and a positive busbar and a negative busbar for inputting/outputting electric power to and from the power semiconductor module, wherein the positive busbar and the negative busbar are mounted on one side of the multilayer board; wherein the positive busbar is connected to a positive main circuit terminal of the power semiconductor module and a positive surface wiring on a surface mounted on the multilayer board, and the positive surface wiring is connected to a 2nth, n representing positive integer, layer of wiring layers of the multilayer board through a first via hole or a first through-hole; wherein the negative busbar is connected to a negative main circuit terminal of the power semiconductor module and a negative surface wiring on a surface mounted on the multilayer board, and the negative surface wiring is connected to a 2n+1th layer facing the 2nth layer of the multilayer board through a second via hole or a second through-hole; wherein the positive main circuit terminal of the power semiconductor module and the positive busbar are electrically connected by a first fixing member; and wherein the negative main circuit terminal of the power semiconductor module and the negative busbar are electrically connected by a second fixing member. - View Dependent Claims (14, 16, 18, 24, 25)
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13. A power converter, comprising:
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a power semiconductor module on which a power semiconductor device is mounted; a control device for controlling the power semiconductor module; a multilayer board for mounting the control device; and a positive busbar and a negative busbar for inputting/outputting electric power to and from the power semiconductor module, wherein the positive busbar is mounted on one side of the multilayer board and the negative busbar is mounted on the other side of the multilayer board, the positive busbar and the negative busbar facing each other; wherein the positive busbar is connected to a positive main circuit terminal of the power semiconductor module and a positive surface wiring on a surface mounted on the multilayer board, and the positive surface wiring is connected to a 2nth, n representing positive integer, layer of wiring layers of the multilayer board through a first via hole or a first through-hole; wherein the negative busbar is connected to a negative main circuit terminal of the power semiconductor module and a negative surface wiring on a surface mounted on the multilayer board, and the negative surface wiring is connected to a 2n+1th layer facing the 2nth layer of the multilayer board through a second via hole or a second through-hole; wherein the positive main circuit terminal of the power semiconductor module and the positive busbar are electrically connected by a first fixing member; and wherein the negative main circuit terminal of the power semiconductor module and the negative busbar are electrically connected by a second fixing member. - View Dependent Claims (15, 17, 19)
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20. A power converter, comprising:
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a power semiconductor module on which a power semiconductor device is mounted; a control device for controlling the power semiconductor module; a multilayer board for mounting the control device; and a positive busbar and a negative busbar for inputting/outputting electric power to and from the power semiconductor module, wherein the positive busbar and the negative busbar are mounted on one side of the multilayer board, or the positive busbar is mounted on one side of the multilayer board and the negative busbar is mounted on the other side of the multilayer board, the positive busbar and the negative busbar facing each other; wherein the positive busbar is connected to a positive main circuit terminal of the power semiconductor module and a positive surface wiring on a surface mounted on the multilayer board, and the positive surface wiring is connected to an even number layer or an odd number layer of wiring layers of the multilayer board through a first via hole or a first through-hole; wherein the negative busbar is connected to a negative main circuit terminal of the power semiconductor module and a negative surface wiring on a surface mounted on the multilayer board, and the negative surface wiring is connected to the even number layer or the odd number layer which is not connected to the positive surface wiring through a second via hole or a second through-hole; wherein the positive main circuit terminal of the power semiconductor module and the positive busbar are electrically connected by a first fixing member; and wherein the negative main circuit terminal of the power semiconductor module and the negative busbar are electrically connected by a second fixing member. - View Dependent Claims (21, 22, 23)
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Specification