TOKYO--(BUSINESS WIRE)--Toshiba Corporation (TOKYO:6502) will provide high performance propulsion systems for new Series 40000 trains that Seibu Railway Co., Ltd. will bring into service on lines serving Tokyo and its suburbs in spring of 2017. The propulsion systems comprise totally enclosed permanent magnet synchronous motors (PMSMs) and 4-in-1 variable-voltage, variable-frequency (VVVF) traction inverters. Seibu Railway, one of Tokyo’s largest private rail companies, operates services from S