Semiconductor Module, and Hybrid Vehicle Drive Device Including the Same
First Claim
1. A semiconductor module comprising:
- a first power supply line connected to a first electrode of a power supply;
a second power supply line connected to a second electrode of said power supply;
first and second switching elements connected between said first power supply line and said second power supply line; and
an insulating substrate having said first and second switching elements mounted thereon, whereinsaid first power supply line includes a bus bar coupled to a first electrode layer of said first switching element, andsaid second power supply line includes a wiring layer disposed on said insulating substrate and coupled to a second electrode layer of said second switching element.
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Accused Products
Abstract
A bus bar constitutes a power line and another bus bar constitutes an earth line. The bus bars are layered in the normal direction of an insulating substrate via an insulating member. Here, the bus bar positioned at the upper side is formed by a metal member and the bus bar positioned at the lower side is formed by a wiring layer formed on the insulating substrate. Since one of the bus bars is the wiring layer fixed to the insulating substrate, it is possible to assure heat radiation of the bus bar. Thus, it is possible to make the bus bar a wiring layer having a comparatively small cross sectional area and reduce the semiconductor module size in the normal direction. By mounting the semiconductor module on the drive device for a hybrid vehicle, it is possible to reduce the vertical-direction size when mounted on the vehicle and lower the position of the center of gravity of the vehicle to improve the running stability.
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Citations
14 Claims
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1. A semiconductor module comprising:
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a first power supply line connected to a first electrode of a power supply; a second power supply line connected to a second electrode of said power supply; first and second switching elements connected between said first power supply line and said second power supply line; and an insulating substrate having said first and second switching elements mounted thereon, wherein said first power supply line includes a bus bar coupled to a first electrode layer of said first switching element, and said second power supply line includes a wiring layer disposed on said insulating substrate and coupled to a second electrode layer of said second switching element. - View Dependent Claims (2, 3, 4)
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5. A drive device for a hybrid vehicle, comprising:
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a damper coupled with a crank shaft of an internal combustion engine; a rotating electric machine disposed so as to have an axis of rotation aligned with an axis of rotation of said damper; a power transfer mechanism transferring, to a driving shaft, a combination of mechanical power generated by said internal combustion engine with mechanical power generated by said rotating electric machine; a case housing said damper, said rotating electric machine and said power transfer mechanism; and a power control unit including a semiconductor module and controlling said rotating electric machine, wherein said semiconductor module includes; a first power supply line connected to a first electrode of a power supply; a second power supply line connected to a second electrode of said power supply; first and second switching elements connected between said first power supply line and said second power supply line; and an insulating substrate having said first and second switching elements mounted thereon, said first power supply line includes a bus bar coupled to a first electrode layer of said first switching element, and said second power supply line includes a wiring layer disposed on said insulating substrate and coupled to a second electrode layer of said second switching element, and said power control unit is, when being projected in a direction of said axis of rotation, disposed in said case so as to fall within a horizontal dimension of a projected portion of said case, that houses said damper, said rotating electric machine and said power transfer mechanism, upon installation on the vehicle. - View Dependent Claims (6, 7, 8, 13)
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9. A drive device for a hybrid vehicle, comprising:
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a damper coupled with a crank shaft of an internal combustion engine; a rotating electric machine disposed so as to have an axis of rotation aligned with an axis of rotation of said damper; a power transfer mechanism transferring, to a driving shaft, a combination of mechanical power generated by said internal combustion engine with mechanical power generated by said rotating electric machine; a case housing said damper, said rotating electric machine and said power transfer mechanism; and a power control unit including a semiconductor module and controlling said rotating electric machine, wherein said semiconductor module includes; a first power supply line connected to a first electrode of a power supply; a second power supply line connected to a second electrode of said power supply; first and second switching elements connected between said first power supply line and said second power supply line; and an insulating substrate having said first and second switching elements mounted thereon, said first power supply line includes a bus bar coupled to a first electrode layer of said first switching element, and said second power supply line includes a wiring layer disposed on said insulating substrate and coupled to a second electrode layer of said second switching element, and said power control unit is, when being projected in a direction of said axis of rotation, disposed in said case so as to fall within a vertical dimension of a projected portion of said case, that houses said damper, said rotating electric machine and said power transfer mechanism, upon installation on the vehicle. - View Dependent Claims (10, 11, 12, 14)
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Specification