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

<table>Stator currents of the SPIM and their estimated values for 50 Hz during a load step (computational simulation): (a) auxiliary winding <svg height="15.475" id="M116" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 16.612499 15.475" 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,.062,11.2)"><use xlink:href="#x1D456"></use></g>
<g transform="matrix(.012,-0,0,-.012,4.7,15.275)"><use xlink:href="#x1D460"></use></g><g transform="matrix(.012,-0,0,-.012,9.162,15.275)"><use xlink:href="#x1D6FC"></use></g>
</svg>, (b) details of <svg height="15.475" id="M117" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 16.612499 15.475" 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,.062,11.2)"><use xlink:href="#x1D456"></use></g>
<g transform="matrix(.012,-0,0,-.012,4.7,15.275)"><use xlink:href="#x1D460"></use></g><g transform="matrix(.012,-0,0,-.012,9.162,15.275)"><use xlink:href="#x1D6FC"></use></g>
</svg>, (c) main winding <svg height="18.450001" id="M118" style="vertical-align:-5.76984pt" version="1.1" viewbox="0 0 16.762501 18.450001" width="16.762501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.2)"><use xlink:href="#x1D456"></use></g>
<g transform="matrix(.012,-0,0,-.012,4.7,15.275)"><use xlink:href="#x1D460"></use></g><g transform="matrix(.012,-0,0,-.012,9.162,15.275)"><use xlink:href="#x1D6FD"></use></g>
</svg>, (d) details of <svg height="20.4125" id="M119" style="vertical-align:-7.35051pt" version="1.1" viewbox="0 0 15.4125 20.4125" width="15.4125" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.2)"><use xlink:href="#x1D456"></use></g>
<g transform="matrix(.012,-0,0,-.012,4.7,15.275)"><use xlink:href="#x1D460"></use></g>
<g transform="matrix(.008,-0,0,-.008,9.162,18.138)"><use xlink:href="#x1D6FD"></use></g>
</svg>.</table>

International Journal of Rotating Machinery

fig8

Figure 8

Figure 8: A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applications 