Indirect angle estimation in switched reluctance motor drives using fuzzy logic based predictor/corrector

In this paper, a novel rotor position estimation scheme is described that was developed to overcome the drawbacks of the previous sensorless techniques, which were proposed for switched reluctance (SR) motor drives. The scheme was implemented by using a digital signal processor. It is based on fuzzy-logic, and does not require complex mathematical models or large look up tables. The results given in the paper exhibit that the position estimation method proposed can provide accurate and continual position data over a wide range of speeds (zero/low/high), and can also function accurately at different operating conditions (chopping/single pulse mode and steady state/transient operation)