ALEXANDRIA, Va., June 4 -- United States Patent no. 12,323,059, issued on June 3, was assigned to KYOCERA AVX Components (Chengdu) Co. Ltd. (Sichuan, China).
"Supercapacitor-based automatic energy-saving system of direct-current high-voltage beam pumping unit" was invented by Bo Zhao (Sichuan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a supercapacitor based automatic energy-saving system of a direct-current high-voltage beam pumping unit. The system comprises a frequency converter, wherein a direct-current bus of the frequency converter is combined with a direct-current contactor, a BUCK/BOOST power conversion circuit and an energy storage unit to form a series loop. The system furthe...