Power conversion apparatus

摘要

The power conversion apparatus includes an inverter circuit which converts a DC current into an AC current and have a U-phase, V-phase, and w-phase power semiconductor modules, and a capacitor module for smoothing the DC current. Each of the power semiconductor modules is configured separately and connected to a first bus bar. The first bus bar is configured with a first positive side bus bar, a first negative side bus bar, and a first insulation member arranged between the first positive side bus bar and the first negative side bus bar. The first bus bar includes a first to third terminals to which the U-phase, V-phase, and W-phase power semiconductor modules are connected, respectively, and a fourth terminal connected to a terminal of the second bus bar protruding from a surface of sealing material of a second bus bar.

主权项

1. A power conversion apparatus comprising:
a U-phase power semiconductor module including a high side U-phase circuit and a low side U-phase circuit of an inverter circuit which converts a DC current into an AC current; a V-phase power semiconductor module including a high side V-phase circuit and a low side V-phase circuit of the inverter circuit; a W-phase power semiconductor module including a high side W-phase circuit and a low side W-phase circuit of the inverter circuit; and a capacitor module including a capacitor cell which smoothes the DC current, wherein: a first bus bar which is connected to the U-phase, V-phase, and W-phase power semiconductor modules, and the U-phase, V-phase, and W-phase power semiconductor modules are configured separately; the capacitor module includes a case for containing the capacitor cell, a sealing material for sealing the capacitor cell, and a second bus bar which is connected to the capacitor cell in the sealing material, a terminal portion of the second bus bar protruding from a surface of the sealing material; the first bus bar is configured with a first positive side bus bar, a first negative side bus bar, and a first insulation member arranged between the first positive side bus bar and the first negative side bus bar; and the first bus bar further includes a first terminal connected to a terminal extending from the U-phase power semiconductor module, a second terminal connected to a terminal extending from the V-phase power semiconductor module, a third terminal connected to a terminal extending from the W-phase power semiconductor module, and a fourth terminal connected in direct contact with an end portion of the terminal portion of the second bus bar protruding from the surface of the sealing material.