ALEXANDRIA, Va., April 21 -- United States Patent no. 12,609,605, issued on April 21, was assigned to Rockwell Automation Technologies Inc. (Mayfield Heights, Ohio).
"Active pre-charge circuit" was invented by Jiangang Hu (Mequon, Wis.) and Zhituo Ni (Hamilton, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A circuit includes a transistor configured to control pre-charging a charge storage device, and a diode coupled in parallel with the transistor. It also includes a shunt resistor coupled between the source of the transistor and a positive end of the charge storage device, an inductor coupled between the shunt resistor and the positive end of the charge storage device, and a current controller coupl...