Patent ID: 8699254
Filing Date: 2014-04-15
Classification: H01L,H02M,H05K

Abstract:
1. A power inverter, comprising: a power module that comprises a plurality of switching devices for an upper arm and a lower arm that make up an inverter circuit, and a DC terminal; a smoothing capacitor module; a gate drive circuit that drives the power module; a coolant passage through which coolant flows; and a chassis that houses the power module, the capacitor module, and the coolant passage, wherein: the chassis is divided into a first region and a second region by providing the coolant passage in the chassis, and the chassis comprises a space that links the first region and the second region; the power module is provided in the first region as fixed to the coolant passage; the capacitor module is provided in the second region; and the capacitor module comprises: a capacitor case; a positive busbar and a negative busbar sandwiching an insulation material to form a laminated structure; a plurality of capacitor cells that are connected to the positive busbar and the negative busbar respectively; and a filling material that fixes the plurality of capacitor cells, the positive busbar and the negative busbar to the capacitor case, wherein: the positive busbar and the negative busbar that are laminated with the insulation material protrude from the filling material and extend to the space, and an end of the positive busbar and an end of the negative busbar that make up the protruded laminated busbar are bent in opposite directions to each other such that internal surfaces at an the end of the positive busbar and the negative busbar having been laminated are opened to provide connecting surfaces; and the positive busbar and the negative busbar are electrically connected to the DC terminal of the power module via the connecting surface of the positive busbar and the connecting surface of the negative busbar, respectively.