Power inverter
First Claim
1. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a power module arranged in the housing, a capacitor module arranged in the housing, and a cooling path forming body forming a cooling path, whereinan opening is formed on the cooling path,the power module includes a metallic base plate, a heat radiating d fin fixed by brazing to a surface of the base plate, and a plurality of semiconductor chips held on another surface of the base plate,the heat radiating fin of the power module projects from the opening into the cooling path, and the power module is fixed to the cooling path forming body so that the opening is closed by the base plate of the power module.
3 Assignments
0 Petitions
Accused Products
Abstract
Water paths for feeding a coolant water through a power converter mounted on an automobile are arranged in parallel, openings are formed on the water paths respectively, heat radiating fins project from the openings, and the openings are closed by a base plate of the power module. Further, the base plate of the power module includes a metal in addition to copper to increase a hardness of the base plate, so that a deterioration of the flatness during fixing the fins with brazing is restrained.
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Citations
20 Claims
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1. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a power module arranged in the housing, a capacitor module arranged in the housing, and a cooling path forming body forming a cooling path, wherein
an opening is formed on the cooling path, the power module includes a metallic base plate, a heat radiating d fin fixed by brazing to a surface of the base plate, and a plurality of semiconductor chips held on another surface of the base plate, the heat radiating fin of the power module projects from the opening into the cooling path, and the power module is fixed to the cooling path forming body so that the opening is closed by the base plate of the power module.
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2. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a power module arranged in the housing, a capacitor module arranged in the housing, and a cooling path forming body forming a cooling path, wherein
an opening is formed on the cooling path, the power module includes a metallic base plate, a heat radiating fin fixed by brazing to a surface of the base plate, and a plurality of semiconductor chips held on another surface of the base plate, the power module is fixed to the cooling path forming body so that the heat radiating fin of the power module projects from the opening into the cooling path, an inlet pipe for taking in a coolant and an outlet pipe for discharging the coolant are fixed to the housing, an inlet portion of the cooling path is deeper than a portion of the cooling path where the heat radiating fin projects, and an outlet portion of the cooling path is deeper than the portion of the cooling path where the heat radiating fin projects water paths for feeding a coolant water through the power converter mounted on an automobile are arranged in parallel, openings are formed on the water paths respectively, heat radiating fins project from the openings, and the openings are closed by the base plate of the power module. Further, the base plate of the power module includes a metal in addition to copper to increase a hardness of the base plate, so that a deterioration of the flatness during fixing the fins with brazing is restrained.
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4. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a plurality of power modules arranged in the housing, a capacitor module arranged in the housing, and a water path forming body forming cooling paths, wherein
the water path forming body includes the cooling paths arranged in parallel, the cooling paths in parallel have respective openings, each of the power modules has a metallic base plate, a heat radiating fin fixed to a surface of the base plate, and a plurality of semiconductor chips fixed to another surface of the base plate, one of the power modules is held by the water path forming body so that the heat radiating fin on the one of the power modules projects from the opening of one of the water paths arranged in parallel into the water path and the opening is closed by the base plate of the power module, the other one of the power modules is held by the water path forming body so that the heat radiating fin on the other one of the power modules projects from the opening of the other one of the water paths arranged in parallel into the water path and the opening is closed by the base plate of the power module, a metallic holding body of wave shape is fixed to the housing, the capacitor module is fixed to the holding body of wave shape, the water path forming body is fixed to the housing, and the water path forming body is cooled by a coolant water flowing in the water paths so that the housing as well as the power module are cooled, the metallic holding body of wave shape is cooled, and the capacitor module is cooled.
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5. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a plurality of power modules arranged in the housing, a capacitor module arranged in the housing, and a water path forming body forming coolant water paths,
the water path forming body includes the coolant water paths arranged in parallel, the coolant water paths in parallel have respective openings, each of the power modules has a metallic base plate, a heat radiating fin fixed on a surface of the base plate, and a plurality of semiconductor chips fixed to another surface of the base plate, one of the power modules is held by the water path forming body so that the heat radiating fin on the one of the power modules projects from the opening of one of the water paths arranged in parallel into the water path and the opening is closed by the base plate of the power module, the other one of the power modules is held by the water path forming body so that the heat radiating fin on the other one of the power modules projects from the opening of the other one of the water paths arranged in parallel into the water path and the opening is closed by the base plate of the power module, an inlet pipe for taking in a coolant water and an outlet pipe for discharging the coolant water are fixed to the housing, an inlet portion of the coolant water path communicating with the inlet pipe of the coolant water path is deeper than a portion of the coolant water path where the heat radiating fin projects, an outlet portion of the coolant water path communicating with the outlet pipe of the coolant water path is deeper than the portion of the coolant water path where the heat radiating fin projects, and a fold back portion of the coolant water path connecting the coolant water paths arranged in parallel to each other is deeper than the portion of the coolant water path where the heat radiating fin projects.
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11. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a power module and a capacitor module arranged in the housing, and a cooling path forming body forming a cooling path,
an opening is formed on the cooling path, the power module has a metallic base plate, a heat radiating fin fixed by brazing to a surface of the base plate, and a plurality of semiconductor chips held on another surface of the base plate, the power module is fixed to a surface of the cooling path forming body so that the heat radiating fin of the power module projects from the opening into the cooling path and the opening is closed by the base plate of the power module, and the capacitor module is fixed onto another surface of the cooling water path forming body.
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12. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a power module and a capacitor module arranged in the housing, and a cooling path forming body forming a cooling path,
an opening is formed on the cooling path, the power module has a metallic base plate, a heat radiating fin fixed by brazing to a surface of the base plate, and a plurality of semiconductor chips held on another surface of the base plate, the power module is fixed to a surface of the cooling path forming body so that the heat radiating fin of the power module projects from the opening into the cooling path, and the capacitor module is fixed onto another surface of the cooling water path forming body, an inlet pipe for taking in a coolant and an outlet pipe for discharging the coolant are fixed to the housing, an inlet portion of the cooling path communicating with the inlet pipe is deeper than a portion of the cooling path where the heat radiating fin projects, an outlet portion of the cooling path communicating with the outlet pipe is deeper than the portion of the cooling path where the heat radiating fin projects.
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14. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a plurality of power modules and a capacitor module arranged in the housing, and a water path forming body forming coolant water paths, wherein
the water path forming body is fixed to the housing and has the coolant water paths arranged in parallel, openings are formed respectively on the coolant water paths in parallel, each of the power modules has a metallic base plate, a heat radiating fin fixed to a surface of the base plate, and a plurality of semiconductor chips fixed to another surface of the base plate, one of the power modules is fixed to a surface of the water path forming body so that the heat radiating fin on the one of the power modules projects from the opening of one of the coolant water paths in parallel into the water path and the opening is closed by the base plate of the power module, the other one of the power modules is fixed to the surface of the water path forming body so that the heat radiating fin on the other one of the power modules projects from the opening of the other one of the coolant water paths in parallel into the water path and the opening is closed by the base plate of the power module, and the capacitor module is fixed to another surface of the water path forming body.
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15. A power converter to be connected to a rotary motor mounted on a vehicle, comprising a metallic housing, a plurality of power modules and a capacitor module arranged in the housing, and a water path forming body forming coolant water paths, wherein
the water path forming has the coolant water paths arranged in parallel, openings are formed respectively on the coolant water paths in parallel, each of the power modules has a metallic base plate, a heat radiating fin fixed to a surface of the base plate, and a plurality of semiconductor chips fixed to another surface of the base plate, one of the power modules is fixed to a surface of the water path forming body so that the heat radiating fin on the one of the power modules projects from the opening of one of the coolant water paths in parallel into the water path and the opening is closed by the base plate of the power module, the other one of the power modules is fixed to the surface of the water path forming body so that the heat radiating fin on the other one of the power modules projects from the opening of the other one of the coolant water paths in parallel into the water path and the opening is closed by the base plate of the power module, the capacitor module is fixed to another surface of the water path forming body, an inlet pipe for taking in a coolant water and an outlet pipe for discharging the coolant water are fixed to the housing, an inlet portion of the coolant water path communicating with the inlet pipe of the coolant water path is deeper than a portion of the coolant water path where the heat radiating fin projects, an outlet portion of the coolant water path communicating with the outlet pipe of the coolant water path is deeper than the portion of the coolant water path where the heat radiating fin projects, and a fold back portion of the coolant water path connecting the coolant water paths arranged in parallel to each other is deeper than the portion of the coolant water path where the heat radiating fin projects.
Specification