Having undertaken studies into a lightweight and highly efficient superconducting transformer for rolling stock, we developed a prototype with a primary winding, four secondary windings and a tertiary winding using bismuth (Bi-2223) high temperature superconducting wire. Its primary voltage is 25kV, which is widely adopted as the catenary voltage on the world's high-speed lines. We adopted liquid nitrogen cooling, the weight being 1.71t excluding the refrigerator. The maximum output available to maintain superconductivity is 3.5MVA. This paper describes the transformer details and test results.
|Number of pages||4|
|Journal||Quarterly Report of RTRI (Railway Technical Research Institute) (Japan)|
|Publication status||Published - Feb 2006|
All Science Journal Classification (ASJC) codes
- Mechanical Engineering