Mitsubishi Heavy Industries, Ltd. (MHI) has been making efforts in the development of power electronics (motors and inverters), which can provide high performance at a low cost and suit the character of each product. Among such efforts, together with Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (MHIET), MHI is now developing a high-speed electric supercharger and has successfully developed and tested the prototype of the single-phase flux switching motor with a simple configuration, which realizes a high response boost pressure.