US Patent Issued to Mitsubishi Electric on March 4 for "Electric motor drive device and refrigeration cycle application device" (Japanese Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,244,255, issued on March 4, was assigned to Mitsubishi Electric Corp. (Tokyo).

"Electric motor drive device and refrigeration cycle application device" was invented by Koyo Shimizu (Tokyo) and Shinya Toyodome (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electric motor drive device includes a booster circuit, an inverter, a connection switching device, and first and second control devices. The booster circuit boosts a voltage value of a bus voltage to be applied to a DC bus. The bus voltage is applied to the inverter, and the inverter applies an AC voltage having a variable frequency and a variable voltage value to an electric motor. The conn...