Patent ID: 8111530
Filing Date: 2012-02-07
Classification: H02M

Abstract:
1. A 3-level power converter, having a DC voltage source having a positive terminal, an intermediate terminal, and a negative terminal, first and second switching elements sequentially connected in series between the positive terminal and an AC output terminal, a first coupling diode connected between a connection point between the first and second switching elements and the intermediate terminal, third and fourth switching elements sequentially connected in series between the AC output terminal and the negative terminal, and a second coupling diode connected between a connection point between the third and fourth switching elements and the intermediate terminal, and performing on/off control of the first to fourth switching elements so as to output a 3-level voltage from the AC output terminal, comprising: a first module including a set of the first and fourth switching elements as a configuration unit; a second module including a set of the second and third switching elements as a configuration unit; a third module including the first coupling diode; and a fourth module including the second coupling diode, wherein the second module, the fourth module, the third module, and the first module are sequentially arranged in a line from a position near the AC output terminal, wherein a planar wiring board performing a connection among the switching elements included in the respective modules is disposed on the respective modules arranged in a line, and wherein divider resistors connected in parallel to the first and second coupling diodes, respectively, are stacked on a side of the wiring board opposite to the modules so as to be sterically arranged.