Maximum MMF reduction using the Newton Raphson method | ||
| The International Conference on Electrical Engineering | ||
| Article 56, Volume 6, 6th International Conference on Electrical Engineering ICEENG 2008, May 2008, Pages 1-12 PDF (101.94 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iceeng.2008.34295 | ||
| Author | ||
| Derya Ahmet Kocabaş | ||
| Electrical & Electronics Eng. Fac., Istanbul Technical University, Istanbul, Turkey Electronic & Electrical Eng. Dep. Loughborough University, Loughborough, UK. | ||
| Abstract | ||
| Abstract: This paper accompanies and complements a related companion paper [1]. Previous contributions have discussed the disturbing effects of space harmonics in induction motors, and several techniques to reduce or eliminate them have been proposed. Since these unwanted effects are produced by the stator winding, it is possible to eliminate or at least to significantly reduce some of the space harmonics, by changing the winding structure that is responsible for producing them. It is shown here that, by regarding the mmf waveform as a stepped function, this can be achieved by optimizing the slot positions and the number of conductors in the slots, using software designed for Matlab, and prepared using the Newton Raphson method. The conventional waveform is analyzed and optimized for convenient numbers of slots, and the necessary mathematical relationships are presented, together with equations for the chosen waveform, and a flow-chart for the associated software. | ||
| Keywords | ||
| Electrical machinery design; space harmonics; machine windings; Newton Raphson method | ||
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