ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,775, issued on May 20, was assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT Co. LTD. (Osaka, Japan).
"Motor drive device" was invented by Satoshi Furukawa (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a motor drive device that drives a motor using a three-phase alternating current as a power source. The motor drive device includes a rectifier circuit that rectifies the three-phase alternating current, a current detection circuit that detects a current of a direct current rectified by the rectifier current, and a cross point detection circuit that detects a cross point between the current detected by the current...