Patent ID: 7221152
Filing Date: 2007-05-22
Classification: H02P

Abstract:
1. A method for determining the speed and position of a rotor of a salient-pole permanent magnet synchronous machine, the method comprising: creating a voltage model on a permanent magnet synchronous machine; forming a voltage reference for a stator of the permanent magnet synchronous machine; determining stator currents of the permanent magnet synchronous machine; calculating a rotor angular speed from the voltage reference and the stator currents using the voltage model, wherein the method further comprises the steps of: forming with signal injection a position tracking signal of the rotor of the permanent magnet synchronous machine; forming an rotor angular speed estimate simultaneously from the calculated rotor angular speed and the rotor position tracking signal; forming a rotor position angle estimate simultaneously from the formed rotor angular speed estimate and the rotor position tracking signal.