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A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applications

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Academic year: 2018

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Figure 2: Block diagram of α- and β-flux observers.
Figure 4: SPIM test bench.
Figure 5: Stator currents of the no-load SPIM and their estimated values during a step variation from 10 Hz to 50 Hz in the stator frequency (computational simulation): (a) auxiliary winding i sα , (b) details of i sα , (c) main winding i sβ , (d) details
Figure 6: Phase portrait λ rα × λ rβ of the vector rotor flux of no-load SPIM (computational simulation): (a) 10 Hz, (b) 50 Hz.
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