US Patent Issued to YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES on Dec. 2 for "Variable frequency drive system, variable frequency speed regulation integrated machine, pump system, and well site layout" (Chinese Inventors)

ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,749, issued on Dec. 2, was assigned to YANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES Co. LTD. (Yantai, China).

"Variable frequency drive system, variable frequency speed regulation integrated machine, pump system, and well site layout" was invented by Shouzhe Li (Shandong, China), Jifeng Zhong (Shandong, China), Liang Lv (Shandong, China) and Xincheng Li (Shandong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The techniques disclosed herein reduce the withstand-voltage requirement on single power cell of a VFD (variable-frequency drive) system, and prevent the VFD system from stopping due to the damage of individual power cell in the VFD sy...