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

<table>Estimated rotor fluxes <svg height="16.450001" id="M136" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 15.15 16.450001" width="15.15" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><use xlink:href="#x1D706"></use></g>
<g transform="matrix(.012,-0,0,-.012,9.45,16.25)"><use xlink:href="#x1D45F"></use></g>
</svg> of the SPIM during the step from 10 to 50 Hz in the frequency stator (experimental results): (a) estimated rotor fluxes, (b) details of the estimated rotor fluxes at 50 Hz.</table>

International Journal of Rotating Machinery

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Figure 13

Figure 13: A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applications 