US Patent Issued to ABB Schweiz on Dec. 9 for "Stable and passive observer-based V/Hz control for synchronous motors" (Finnish Inventors)

ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,494,727, issued on Dec. 9, was assigned to ABB Schweiz AG (Baden, Switzerland).

"Stable and passive observer-based V/Hz control for synchronous motors" was invented by Lauri Tiitinen (Espoo, Finland) and Marko Hinkkanen (Espoo, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to an aspect, there is provided an apparatus for a drive for driving a synchronous motor. The apparatus includes means for performing the following. The apparatus obtains a stator current vector and estimates, using a state observer, a stator flux linkage vector based on the stator current vector, a voltage reference vector, a stator angular frequency reference and a...