Computation of Electromagnetic Torque in a Double Rotor Switched Reluctance Motor Using Flux Tube Methods

Chockalingam Aravind Vaithilingam, Norhisam Misron, Mohammad Reza Zare, Ishak Aris and Mohammad Hamiruce Marhaban
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Chockalingam Aravind Vaithilingam: Department of Electrical & Electronic Engineering, University Putra Malaysia, Serdang 43400 UPM, Malaysia
Norhisam Misron: Department of Electrical & Electronic Engineering, University Putra Malaysia, Serdang 43400 UPM, Malaysia
Mohammad Reza Zare: Department of Electrical & Electronic Engineering, University Putra Malaysia, Serdang 43400 UPM, Malaysia
Ishak Aris: Department of Electrical & Electronic Engineering, University Putra Malaysia, Serdang 43400 UPM, Malaysia
Mohammad Hamiruce Marhaban: Department of Electrical & Electronic Engineering, University Putra Malaysia, Serdang 43400 UPM, Malaysia

Energies, 2012, vol. 5, issue 10, 1-19

Abstract: With their highly robust nature and simple design, switched reluctance machines are finding their way into numerous modern day applications. However, they produce oscillatory torque that generates torque ripple and mechanical vibrations. A double rotor structure to maximize the flux linkage and thereby increase the torque generating capability is proposed. As the machine operates close to saturation, the torque computation depends heavily on the energy conversion as the rotor rolls over the stator for a fixed pole pitch. The flux linkage characteristics are highly non-linear, hence estimation of the magnetic and mechanical parameters is extremely cumbersome. Magnetic circuit analysis by interpretation of the number of flux tubes using integration techniques at different positions of the machine to develop the flux linkage characteristics of the double rotor structure is presented. Computation of the inductances during the movement of rotor from unaligned to aligned is crucial in determining the generated torque. Relevant equations of calculations for inductance and flux linkages in the aligned, partially aligned and unaligned positions are computed. The partially aligned computation is based on the average on two intermediate positions, namely the 1/4th aligned and 3/4th aligned conditions. The static torque characteristics based on the energy conversion principles are used to compute the torque value. Results from simulation and experiments used for performance evaluation of the proposed flux tube analysis for computation of the electro-magnetic torque are presented.

Keywords: double rotor switched reluctance motor; magnetic circuit analysis; flux linkage computation; flux tube analysis; energy conversion principle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2012
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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