Patent ID: 8970148
Filing Date: 2015-03-03
Classification: H02M,H02P

Abstract:
1. An inverter for a motor drive having a filter for reducing radiated emissions generated by the inverter, the inverter comprising: an input configured to receive a direct current (DC) voltage having a positive terminal and a negative terminal; an output having at least two terminals, the output configured to provide an alternating current (AC) voltage; at least one switching device configured to selectively connect one of the positive terminal and the negative terminal to the output; at least one ground connection; a capacitor electrically connected between each terminal of the output and one of the ground connections; a multilayer circuit board including: a power module containing each of the switching devices wherein the power module is mounted on the first outer layer of the circuit board and includes a plurality of output terminals, each power module output terminal corresponding to one of the inverter output terminals and configured to be inserted into a via passing through the circuit board, each via is electrically connected on the first interior layer to the conductive plane for the corresponding phase of the AC output voltage, and wherein the capacitors electrically connected between each inverter output terminal and one of the wound connections is defined by a capacitance present between the conductive plane on the first interior layer and ground plane on the second interior layer of the circuit board.