Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-08-01
2006-08-01
Duda, Rina (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S800000, C318S810000, C318S807000, C318S767000, C363S034000, C363S037000, C363S039000
Reexamination Certificate
active
07084604
ABSTRACT:
A method of controlling of an induction machine using an inverter is disclosed with output LC filter. The method includes determining an inverter output current vector (iA), determining an inverter output voltage vector (uA), and forming a full-order observer having a system matrix (Â) and gain vector (K). The observer produces an estimated rotor flux linkage vector ({circumflex over (ψ)}R), an estimated stator current vector (îs), an estimated stator voltage vector (ûs) and an estimated inverter output current vector (îA). An estimation error (iA−îA) of the inverter output current vector is determined, and a speed adaptation law is formed based on the estimation error of the inverter output current vector for determining an estimate for electrical angular speed ({circumflex over (ω)}m) of the induction machine. The induction machine is controlled based on the produced estimates and a measured inverter output current.
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ABB Oy
Buchanan & Ingersoll PC
Duda Rina
Horn Robert W.
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