ALEXANDRIA, Va., March 5 -- United States Patent no. 12,244,248, issued on March 4, was assigned to Mitsubishi Electric Corp. (Tokyo).
"Power conversion device" was invented by Kazuhiro Fujioka (Tokyo), Yoshiaki Ishiguro (Tokyo) and Ryota Kondo (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A setting unit sets a duty ratio of a PWM signal based on a target voltage value, and outputs the duty ratio to a voltage conversion circuit. An estimated value calculation unit cyclically calculates an estimated duty ratio value based on the detected input voltage value and the detected output voltage value. An abnormality detection unit cyclically calculates, as a difference value, a difference between an updated...