| Drift and Parameter Compensated Flux, Estimator for PMSM with Assistance of Alternating Carrier HF Injection - Encoderless Control in Whole Speed Range | ||
| Author(s) | Stefan Gottfried and Ralph Kennel | |
| Abstract | A hybrid position observer for PMSM is proposed where emf and saliency are evaluated simultaneously at low speed. Transition to high speed requires no parameter change nor phase over process. The circular rotor flux trajectory is estimated by a pure integrator. Drift in radial direction is compensated by feedback control of rotor flux magnitude. At low speed Alternating High Frequency voltage Injection (HFI) assists the integrator by providing tangential feedback. Online tracking of stator resistance improves performance. Implementation on a DSP system shows practical feasibility and highly dynamic position tracking from zero speed to field weakening range. | |
| Download | No download available | |
| Type | Members Only | |
| Date | Last modified 2008-12-07 by System | |
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