ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,456,925, issued on Oct. 28, was assigned to HITACHI ASTEMO LTD. (Hitachinaka, Japan).
"Voltage transformer" was invented by Kazunari Kurokawa (Hitachinaka, Japan), Satoshi Hashino (Hitachinaka, Japan), Takuma Kato (Hitachinaka, Japan) and Koji Ikeda (Hitachinaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A voltage transformer includes a magnetic coupling interleaved chopper circuit and a control unit configured to control the magnetic coupling interleaved chopper circuit. The control unit includes a switching frequency setting unit configured to set a switching frequency of the magnetic coupling interleaved chopper circuit on the basis of a s...