3.3kV Power Module for Electric Distribution Equipment with SiC Trench-Gate MOSFET

Abstract

3.3 kV / 200 A All-SiC module with trench-gate SiC MOSFETs is developed for static var compensator (SVC), a type of the electric distribution equipment. This module has the structural feature; resin-mold single-switch units are arrayed and electrically connected by bus-bars to make the circuit configuration dual (2-in-1). This structure leads to the smaller stack and the higher long-term reliability. Applied trench-gate SiC MOSFETs, lower loss is also accomplished. ON-state resistance is reduced around 10%. In addition, 60% reduction of total switching loss is achieved. These characteristics of low energy loss can contribute to downsizing of SVC equipment as well as energy saving.