Patent ID: 6999330
Filing Date: 2006-02-14
Classification: H02M,H05K

Abstract:
1. A power converter for carrying out a control by switching operation, comprising: a converter for converting an alternating current into a direct current; an inverter for converting the direct current into an alternating current; direct current buses for connecting an output terminal of the converter and an input terminal of the inverter; a multilayer wiring board formed with the direct current buses; and a smoothing capacitor connected between the direct current buses, wherein a positive side bus and a negative side bus of the direct current bus are arranged at positions at which wiring layers of the multilayer wiring board contiguous to each other substantially overlap; the direct current bus has a bent structure for making a transmission path length on one side in a direct current transmitting direction shorter than a transmission path length on other side thereof; a line width of the direct current bus is constituted by a width equal to or larger than a width by which a damping factor of a high frequency current in the direct current transmitting direction becomes substantially a constant value at least with regard to a portion in a predetermined range from the output terminal of the converter and a portion in a predetermined range from the input terminal of the inverter; and the bent structure of the direct current bus diffuses the high frequency current generated by the switching operation to the one side of the direct current bus.