US Patent Issued to Hitachi Industrial Equipment Systems on May 5 for "Power conversion apparatus, deterioration determination method for smoothing capacitor" (Japanese Inventors)

ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,886, issued on May 5, was assigned to Hitachi Industrial Equipment Systems Co. Ltd. (Tokyo).

"Power conversion apparatus, deterioration determination method for smoothing capacitor" was invented by Mendez Mauricio Tobon (Tokyo), Masato Ohya (Tokyo), Kazushige Hotta (Tokyo) and Yusaku Onuma (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A capacitance acquiring unit acquires a plurality of initial capacitance values indicating capacitance values of a smoothing capacitor in an initial state and acquires a plurality of operation capacitance values indicating capacitance values of the smoothing capacitor in an operation state, and a deterioration de...