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

<table>Measured and estimated currents of the SPIM when the rated mechanical load is removed (experimental results): (a) auxiliary winding <svg height="15.475" id="M148" 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="M149" 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="M150" 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="18.450001" id="M151" 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>.</table>

International Journal of Rotating Machinery

fig15

Figure 15

Figure 15: A Rotor Flux and Speed Observer for Sensorless Single-Phase Induction Motor Applications 