Patent ID: 8023281
Filing Date: 2011-09-20
Classification: H02M,H05K

Abstract:
1. An inverter apparatus comprising: a U-phase insulated metal substrate (IMS) board mounting a U-phase output stage that outputs a U-phase voltage; a V-phase IMS board mounting a V-phase output stage that outputs a V-phase voltage; a W-phase IMS board mounting a W-phase output stage that outputs a W-phase voltage; a printed circuit board having a capacitor area on which smoothing capacitors for stabilizing a DC power supply voltage fed to said U-phase, V-phase, and W-phase output stages are mounted; a U-phase drive circuit provided on said printed circuit board and switches power transistors within said U-phase output stage; a V-phase drive circuit provided on said printed circuit board and switches power transistors within said V-phase output stage; and a W-phase drive circuit provided on said printed circuit board and switches power transistors within said W-phase output stage, wherein said U-phase drive circuit is positioned adjacent to a first edge of said printed circuit board, wherein said V-phase drive circuit is positioned adjacent to a second edge of said printed circuit board, wherein said W-phase drive circuit is positioned adjacent to a third edge of said printed circuit board, wherein said U-phase, V-phase, and W-phase IMS boards are arranged around a center point opposing said capacitor area, such that the U-phase IMS board is not in line with the V-phase and W-phase IMS boards, and the V-phase IMS board is not in line with the W-phase IMS board, and wherein each of the U-phase IMS board, the V-phase IMS board, and the W-phase IMS board mounts an output stage which incorporates a high-side transistor and a low-side transistor.