GROUND CIRCUIT OF VEHICULAR ELECTRIC POWER CONVERSION SYSTEM

To provide a ground circuit of a vehicular electric power conversion system which can inhibit unbalance of train current flowing through a pair of rails.SOLUTION: A ground circuit includes a ground wire provided at the downstream side of an output of a vehicular current converter so as to connect an output of a vehicular electric power conversion device with a first ground device and a second ground device. The ground wire includes a pre-branch wire, a first branch wire, and a second branch wire. The ground wire includes at least one of a pre-branch coil winding wire part included in the pre-branch wire, a first coil winding wire part included in the first branch wire, and a second coil winding wire part included in the second branch wire.SELECTED DRAWING: Figure 3 【課題】一対のレールを流れる電車電流の不平衡を抑制できる車両用電力変換装置の接地回路を提供する。【解決手段】接地回路は、車両用電力変換装置の出力と、第１接地装置及び第２接地装置のそれぞれとの間を接続するために、車両用電流変換装置の出力の下流側に設けられた接地電線を含む。接地電線は、分岐前電線と、第１分岐電線と、第２分岐電線とを含む。接地電線は、分岐前電線に含まれる分岐前コイル巻線部、第１分岐電線に含まれる第１コイル巻線部及び第２分岐電線に含まれる第２コイル巻線部を、少なくとも一つ含む。【選択図】図３