Modular Rotor Single Phase Field Excited Flux Switching Machine with Non-Overlapped Windings

Lutf Ur Rahman, Faisal Khan, Muhammad Afzal Khan, Naseer Ahmad, Hamid Ali Khan, Mohsin Shahzad, Siddique Ali and Hazrat Ali
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Lutf Ur Rahman: Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road Abbottabad, Abbottabad 22060, Pakistan
Faisal Khan: Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road Abbottabad, Abbottabad 22060, Pakistan
Muhammad Afzal Khan: Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road Abbottabad, Abbottabad 22060, Pakistan
Naseer Ahmad: Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road Abbottabad, Abbottabad 22060, Pakistan
Hamid Ali Khan: Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road Abbottabad, Abbottabad 22060, Pakistan
Mohsin Shahzad: Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road Abbottabad, Abbottabad 22060, Pakistan
Siddique Ali: Department of Electrical Engineering, University of Engineering and Technology Peshawar, Peshawar 25120, Pakistan
Hazrat Ali: Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road Abbottabad, Abbottabad 22060, Pakistan

Energies, 2019, vol. 12, issue 8, 1-27

Abstract: This paper aims to propose and compare three new structures of single-phase field excited flux switching machine for pedestal fan application. Conventional six-slot/three-pole salient rotor design has better performance in terms of torque, whilst also having a higher back-EMF and unbalanced electromagnetic forces. Due to the alignment position of the rotor pole with stator teeth, the salient rotor design could not generate torque (called dead zone torque). A new structure having sub-part rotor design has the capability to eliminate dead zone torque. Both the conventional eight-slot/four-pole sub-part rotor design and six-slot/three-pole salient rotor design have an overlapped winding arrangement between armature coil and field excitation coil that depicts high copper losses as well as results in increased size of motor. Additionally, a field excited flux switching machine with a salient structure of the rotor has high flux strength in the stator-core that has considerable impact on high iron losses. Therefore, a novel topology in terms of modular rotor of single-phase field excited flux switching machine with eight-slot/six-pole configuration is proposed, which enable non-overlap arrangement between armature coil and FEC winding that facilitates reduction in the copper losses. The proposed modular rotor design acquires reduced iron losses as well as reduced active rotor mass comparatively to conventional rotor design. It is very persuasive to analyze the range of speed for these rotors to avoid cracks and deformation, the maximum tensile strength (can be measured with principal stress in research) of the rotor analysis is conducted using JMAG. A deterministic optimization technique is implemented to enhance the electromagnetic performance of eight-slot/six-pole modular rotor design. The electromagnetic performance of the conventional sub-part rotor design, doubly salient rotor design, and proposed novel-modular rotor design is analyzed by 3D-finite element analysis (3D-FEA), including flux linkage, flux distribution, flux strength, back-EMF, cogging torque, torque characteristics, iron losses, and efficiency.

Keywords: flux switching machine; modular rotor; non-overlap winding; magnetic flux analysis; iron losses; copper loss; stress analysis; finite element method (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: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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