Electric power conversion/inversion apparatus

An electric power conversion/inversion apparatus, comprising:

• a plural number of input bus bars for inputting electric power from an outside;
• a plural number of output bus bars for outputting electric power to the outside;
• and
• a plural number of semiconductor chip carriers, being electrically connected to said input bus bars and said output bus bars for converting/inverting the electric power inputted into an output, wherein said plural number of input bus bars include a positive input bus bar and a negative input bus bar, being provided extending in parallel to each other, while said plural number of output bus bars are provided extending in parallel to each other and crossing over said positive and said negative input bus bars in longitudinal directions thereof, said plurality of semiconductor chip carriers, each having a semiconductor chip including a semiconductor switching element therein and a metal member being electrically and thermally connected to a positive surface and a negative surface on both sides of said semiconductor chip, are disposed, being put between said positive input bus bar and said negative input bus bar and said plurality of output bus bars at crossing positions thereof, and connected electrically and thermally, to said positive input bus bar in a pole direction consistent therewith while to said negative input bus bar in a pole direction consistent therewith, and further to said common output bus bars in pole directions being different from side by side.

An electric power conversion/inversion apparatus, comprising:

• a plural number of input bus bars for inputting electric power from an outside;
• a plural number of output bus bars for outputting electric power to the outside;
• a plural number of semiconductor chip carriers, being electrically connected to said input bus bars and said output bus bars for converting/inverting the electric power inputted into an output;
• and
• a suppression mechanism for suppressing said input bus bars and said output bus bars onto said semiconductor chip carriers, wherein said plural number of input bus bars include a positive input bus bar and a negative input bus bar, being provided extending in parallel to each other, while said plural number of output bus bars are provided extending in parallel to each other and crossing over said positive and said negative input bus bars in longitudinal directions thereof, said plurality of semiconductor chip carriers, each having a semiconductor chip including a semiconductor switching element therein and a low thermal expansion metal member being electrically and thermally connected to a positive surface and a negative surface on both sides of said semiconductor chip, are disposed, being put between said positive input bus bar and said negative input bus bar and said plurality of output bus bars at crossing positions thereof, and connected electrically and thermally, to said positive input bus bar in a pole direction consistent therewith while to said negative input bus bar in a pole direction consistent therewith, and further to said common output bus bars in pole directions being different from side by side.

An electric power conversion/inversion apparatus, comprising:

• a plural number of input bus bars for inputting electric power from an outside;
• a plural number of output bus bars for outputting electric power to the outside;
• a plural number of semiconductor chip carriers, being electrically connected to said input bus bars and said output bus bars for converting/inverting the electric power inputted into an output;
• a case for having said and semiconductor chip carriers built-in;
• and
• a cooler for cooling said plural number of input bus bars or said plural number of output bus bars, wherein said plural number of input bus bars and said plural number of output bus bars are provided so that they intersect to each other, said plurality of semiconductor chip carriers, each having a semiconductor chip including a semiconductor switching element therein and a metal member being electrically and thermally connected to a positive and a negative surfaces on both sides of said semiconductor chip, are disposed, being put between said input bus bars and said plurality of output bus bars at crossing positions thereof, and connected electrically and thermally, to said positive input bus bar in a pole direction consistent therewith while to said negative input bus bar in a pole direction consistent therewith, and further to said common output bus bars in pole directions being different from side by side, said case, being made of plastic as a whole, is molded with said input bus bars or said output bus bars in one body with exposing surfaces thereof on anti-semiconductor side, when being formed from the plastic, and said cooler is disposed on an outside said case, being connected thermally to a surface of the anti-semiconductor side, on which said input bus bars or said output bus bars are exposed, through an electric insulator layer.

An electric power conversion/inversion apparatus, comprising:

• a plural number of input bus bars for inputting DC electric power from a battery;
• a plural number of output bus bars for outputting electric power to an electrical rotating machine for use in an automobile;
• a plural number of semiconductor chip carriers, being electrically connected to said input bus bars and said output bus bars for converting/inverting the DC electric power inputted into three-phase AC output;
• a case for having said and semiconductor chip carriers built-in;
• a cooler for cooling said plural number of input bus bars or said plural number of output bus bars;
• and
• a suppression mechanism for suppressing said input bus bars and said output bus bars onto said semiconductor chip carriers, wherein, said plural number of input bus bars, including a positive input bus bar and a negative input bus bar therein, and said plural number of output bus bars being provided three in number thereof, are disposed, so that they intersect each other, said plurality of semiconductor chip carriers, each having a semiconductor chip, including a semiconductor switching element and a diode connected in a reverse-parallel direction thereto in a form of MOSFET, and a metal member being electrically and thermally connected to a positive and a negative surfaces on both sides of said semiconductor chip, are disposed, being put between said input bus bars and said plurality of output bus bars at crossing positions thereof, and connected electrically and thermally, to said positive input bus bar in a pole direction consistent therewith while to said negative input bus bar in a pole direction consistent therewith, and further to said common output bus bars in pole directions being different from side by side, thereby forming a three-phase bridge circuit, said case made of plastic is formed with said input bus bars or said output bus bars in one body when being formed from the plastic, while exposing surfaces thereof on anti-semiconductor side to an outside, said cooler is disposed on an outside of said case, being connected thermally through an electrical insulating layer to the surface on the anti-semiconductor side, on which said input bus bars or said output bus bars are exposed, and said suppression mechanism is provided for suppressing said input bus bars or said output bus bars, which are formed with said case in one body, to said output bus bars or said input bus bars on an opposing side thereto.