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US 7,067,997 B2Granted
Method for determining rotor position angle of synchronous machine
AssigneeABB AB
InventorMika Neuvonen
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Abstract
A method for determining a rotor position angle of a synchronous machine, the method comprising the steps of determining inductances (LA, LB, LC) of the synchronous machine in stator phase directions; generating an inductance vector (L) on the basis of the determined inductances (LA, LB, LC); and determining the rotor position angle (qr) on the basis of the determined inductance vector angle.
Claims3
A method for determining a rotor position angle of a synchronous machine, comprising the steps of:
- determining inductances (LA, LB, LC) of the synchronous machine in stator phase directions;
- forming an inductance vector (L) on the basis of the determined inductances (LA, LB, LC);
- each vector having an angle that is dependent on the magnitudes of the determined inductances;
- and
- determining a rotor position angle (θr) on the basis of the determined inductance vector angle.
2 more elements
Dependencies are inferred from the claim text.