ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,525,889, issued on Jan. 13, was assigned to Rampx Holdings Inc. (Coquition, Canada).
"Dual-stage AC to AC electric power converters" was invented by Jiacheng Wang (Coquitlam, Canada) and Shuai Wang (Abbotsford, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosed family of electrical power converters consists of two multiphase semiconductor conversion stages to accomplish variable voltage and variable frequency (VVVF) AC-AC power conversion. A middle filter network is positioned between the two conversion stages to absorb high-frequency harmonic currents produced by converter switching and to provide a freewheel path for inductive output ...