Patent ID: 9570972
Date: 2017-02-14
CPC Classifications: H02H,H02M,Y02B

Claim:
1. A CR snubber circuit that is formed on a substrate and that includes a capacitor and a resistor that are connected in series between DC terminals that apply DC voltage to a power semiconductor module that is formed with inclusion of a switching element, wherein a first current path formed on one surface of the substrate and a second current path formed on another surface, which is an opposite side of the one surface of the substrate, are opposed to each other with the substrate being sandwiched therebetween, the capacitor and the resistor are arranged such that current flows in opposite directions in the first current path and the second current path, and a band elimination filter is formed by the capacitor, the resistor, and an effective inductance component obtained by coupling an inductance component included in the first current path and an inductance component included in the second current path.