ALEXANDRIA, Va., March 31 -- United States Patent no. 12,592,634, issued on March 31, was assigned to Huawei Digital Power Technologies Co. Ltd. (Shenzhen, China).

"Direct current converter, control method, direct current combiner box, and photovoltaic power generation system" was invented by Xinyu Yu (Shanghai), Jinxiang Zhan (Shanghai), Fuqiang Xu (Shanghai), Jun Wang (Shanghai) and Kai Xin (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A direct current converter includes a three-level power switching circuit, a resonant circuit, and a controller. An output voltage at an output end of the three-level power switching circuit is used to charge the resonant circuit. The controller is configured to c...