US Patent Issued to ABB Schweiz on Nov. 4 for "Stable and passive observer-based V/Hz control for induction motors" (Finnish Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,463,570, issued on Nov. 4, was assigned to ABB Schweiz AG (Baden, Switzerland).

"Stable and passive observer-based V/Hz control for induction motors" was invented by Marko Hinkkanen (Espoo, Finland) and Lauri Tiitinen (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 an induction motor. The apparatus having means for performing the following. The apparatus obtains a stator current vector of the induction motor and estimates, using a state observer for the stator and/or rotor flux linkage vector of the induction motor, the stator and/or rotor flux linkage vector ba...