Patent ID: 9543856
Date: 2017-01-10
CPC Classifications: H02M,H03K

Claim:
1. A power conversion apparatus comprising: series connections each including a low-voltage side switching element having first and second ends and a high-voltage side switching element connected to the first end of the low-voltage side switching element; a negative side bus to which the second ends of the low-voltage side switching elements are connected; drive circuits provided respectively for the low-voltage side switching elements for respectively driving the low-voltage side switching elements; and a power supply connected to the drive circuits; wherein a ground voltage of each of the drive circuits is a voltage of the second end of a corresponding one of the low-voltage side switching elements, the negative side bus has an elongated shape, the low-voltage side switching elements are arranged along a direction in which the negative side bus extends to be connected to the negative side bus, a negative terminal of the power supply is connected to one of connection nodes of the negative side bus with the low-voltage side switching elements except the connection node closest to an extreme end of the negative side bus, and a low pass filter is interposed between the power supply and each of the drive circuits except the drive circuit corresponding to the low-voltage side switching element connected with the negative terminal of the power supply.