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Encoderless Position Control of Induction Machines
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| Author(s) |
N. Teske; G. M. Asher; M. Sumner; K. J. Bradley |
| Abstract |
This paper presents advances in sensorless position control of induction machines using a standard or ‘symmetric’
rotor. The rotor position information is obtained by high frequency voltage injection and using the
modulating e ect of the rotor slots. This makes true sensorless control possible, including zero speed. The
deteriorating e ect of saturation-induced saliencies at full flux and higher loads is suppressed by using a new
harmonic compensation scheme which we term Space-Modulation Profiling (SMP). This method also reduces
the unwanted modulation of the high frequency voltage at the instance of a fundamental current crossing
through zero due to inverter deadtime.
This paper analyzes the distorting modulation due to saturation and current zero-crossing and shows the
decoupling of the position harmonics via SMP as a solution to enhance the position estimation accuracy.
Results are presented, showing true sensorless position control at full flux and under high load which has not
been published before. |
| Download |
| Filename: | EPE2001 - PP00989 - Teske.pdf |
| Filesize: | 1.428 MB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-11 by System |
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