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

<table>Estimated and measured rotor speed <svg height="12.0625" id="M135" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 16.612499 12.0625" width="16.612499" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,7.775)"><use xlink:href="#x1D714"></use></g>
<g transform="matrix(.012,-0,0,-.012,10.912,11.863)"><use xlink:href="#x1D45F"></use></g>
</svg> of the SPIM during the step in the frequency stator (experimental results): (a) from 10 Hz to 50 Hz, (b) from 50 Hz to 10 Hz.</table>

International Journal of Rotating Machinery

fig12

Figure 12

Figure 12: A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applications 