ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,471, issued on Jan. 27, was assigned to Mitsubishi Electric Corp. (Tokyo).

"Power converter, motor drive system, and power conversion method" was invented by Tomoyuki Taniguchi (Tokyo), Kazushige Sawada (Tokyo), Keisuke Uemura (Tokyo) and Kazuhiro Yamada (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A power converter includes: a first converter circuit; an inverter circuit; a first smoothing unit connected between the first converter circuit and the inverter circuit, the first smoothing unit including a first smoothing capacitor having a breakdown voltage equal to a second voltage threshold and a second smoothing capacitor having a breakdown...