Volume 16, Issue 1 (March 2020)                   IJEEE 2020, 16(1): 122-129 | Back to browse issues page

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Davari H, Alinejad-Beromi Y. Torque Ripple Reduction in Switched Reluctance Motors by Rotor Poles Shape and Excitation Pulse Width Modification. IJEEE 2020; 16 (1) :122-129
URL: http://ijeee.iust.ac.ir/article-1-1628-en.html
Torque Ripple Reduction in Switched Reluctance Motors by Rotor Poles Shape and Excitation Pulse Width Modification
H. Davari , Y. Alinejad-Beromi
Abstract:   (3398 Views)
In this paper, at first, a 24/16 three-phase switched reluctance motor is designed, then the rotor poles shape tips corrected for reduction ripple of single-phase torque waveform. By doing this, the single-phase torque waveform has a flat surface and consequently, the single-phase torque ripple is reduced. Also, due to the commutation between the machine phases, the torque drops during this time, which are known as torque pits. To reduce the ripple torque at these points, which requires overlap between the two successive phases of the machine, the pulse width of the excitation of the machine phases is adjusted. Comparisons have been made between two types of direct current excitation and chopped current (with different pulse widths). The results show that for constant pulse width under chopped current, applying the arc and modifying the shape of the rotor poles can reduce the torque ripple by 3.4%. Also, by applying chopped current control, the torque ripple was reduced by 46.7% compared to its conventional design structure.
Keywords: Non-Uniform Air Gap , Pole Shape , Switched Reluctance Motor , Torque Ripple
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  • A novel rotor pole shape design for 24/16 pole SRM to reduce slope of single-phase torque waveform is presented.
  • Torque Ripple reduced about 3.4% by new shape rotor pole without changing the pulse width and type of current excitation (current chopping control).
  • Torque ripple reduced to about 46.7 % by using new rotor pole shape and suitable pulse widths for excitation of phases.

Type of Study: Research Paper | Subject: Special Electric Machines
Received: 2019/10/06 | Revised: 2019/11/11 | Accepted: 2019/11/16
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
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© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.