ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,525,898, issued on Jan. 13, was assigned to Huawei Digital Power Technologies Co. Ltd. (Shenzhen, China).

"Grid-tied inverter apparatus and grid-tied control method" was invented by Yunyu Tang (Shanghai), Lei Shi (Shanghai), Yaojia Zhang (Shanghai), Dong Chen (Shanghai) and Kai Xin (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "This application describes examples of a grid-tied inverter apparatus and a grid-tied control method. In one example, the grid-tied inverter apparatus includes an inverter circuit, a controller, and a filter circuit. The controller is configured to adjust switching frequencies of a plurality of power switching transisto...