Patent ID: 7869193

Claim:
A matrix converter power conversion apparatus comprising: an alternating current (AC) capacitor including linearly arranged first, second and third terminals respectively formed in three portions thereof; an Insulated Gate Bipolar Transistor (IGBT) including linearly arranged first, second and third input terminals respectively formed in three portions thereof; and a bus bar for connecting together the three-portion terminals of the AC capacitor and the three-portion input terminals of the IGBT, wherein the AC capacitor and the IGBT are disposed such that the linearly arranged terminals of the AC capacitor and the linearly arranged input terminals of the IGBT are parallel to each other and the first, second and third input terminals of the IGBT are respectively close to the first, second and third terminals of the AC capacitor, and the bus bar is formed as a laminate bus bar provided in such a manner that three plate-shaped bus bars are laminated on top of each other and insulators are inserted between the respective bus bars as well as on the front and back surfaces of the bus bars, in the respective plate-shaped bus bars, there are provided internal terminals for connecting together the three-portion terminals of the AC capacitor and the three-portion input terminals of the IGBT, the internal terminals being formed at positions where the internal terminals are not laminated on top of each other, and the bus bars being shaped to adjoin each other on an entire surface of a substantially rectangular area where current routes of the bus bars are laminated on top of each other, in the three plate-shaped bus bars, there are formed hole portions which respectively penetrate through between the first terminal and the first input terminal and through between the third terminal and the third input terminal, and the current routes include a current route formed between the first terminal and the first input terminal and detouring the hole portions, and a current route formed between the third terminal and the third input terminal and detouring the hole portions are respectively set to substantially overlap a current route formed between the second terminal and the second input terminal, and the terminals of the AC capacitor and the input terminals of the IGBT are connected together through the internal terminals.