Power conversion apparatus
The connection between the terminals of three-phase electric parts used in a matrix converter is simplified to thereby reduce the inductance between conductors. An AC capacitor and an 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 also that the three terminals of the AC capacitor and the three input terminals of the IGBT are situated close to each other. A bus bar is formed as a laminate bus bar which can be provided by laminating three plate-shaped bus bars on top of each other. In the respective plate-shaped bus bars, there are provided internal terminals for connecting together the mutually adjoining ones of the three-portion terminals of the AC capacitor and the three-portion input terminals of the IGBT, and the mutually adjoining terminals are connected together through the internal terminals.
1. 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.