An investigation into the effect of non-sinusoidal inductance variation on sensorless position detection in interior permanent magnet machines is presented. A rotor position method, based on determining the major axis of an ellipse defined by the motor current, is modified to provide position information over one cycle. The effect of non-sinusoidal inductance variation, caused by stator slotting, is demonstrated and it is shown that the accuracy of the elliptical technique can be significantly reduced as a result. A compensation scheme to improve accuracy is proposed.
|Translated title of the contribution||Effects of nonsinusoidal inductance variation on saliency based position detection techniques in interior permanent magnet synchronous machines|
|Title of host publication||2nd IEE International Conference on Power Electronics, Machines and Drives, PEMD 2004, University of Edinburgh, 31 March - 2 April|
|Publisher||Institution of Engineering and Technology (IET)|
|Pages||308 - 313|
|Number of pages||6|
|Publication status||Published - Mar 2004|