ALEXANDRIA, Va., June 2 -- United States Patent no. 12,647,057, issued on June 2, was assigned to CLEAN POWER PLUS Co. LTD. (Taoyuan, Taiwan).
"Electric vehicle motor rotational speed value generating device" was invented by Te Ju Wang (Taoyuan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric vehicle motor rotational speed value generating device comprises: a first counter counting an input frequency according to a system frequency and outputs a first bit numerical value; a second counter receiving the first bit numerical value, the second counter counts the first bit numerical value with an exponent n in a 2n exponential function that approximates a maximum rotational speed command value a...