Abstract
This paper proposes a novel brushless synchronous machine topology that utilizes stator sub-harmonic magnetomotive force (MMF) for desirable brushless operation. The sub-harmonic MMF component that is used in this novel topology is one fourth of the fundamental MMF component, whereas, in previous practices, it was half. To achieve the brushless operation, the novel machine uses a unique stator winding configuration of two sets of balanced 3-phase winding wound in 3 layers. For the rotor, additional winding is placed to induce the sub-harmonic component to achieve the brushless excitation. Unlike its predecessors, it utilizes maximum allowable space in the stator to house conductors in all of its slots. To implement the topology, 8-pole, 48-slot sub-harmonic brushless synchronous machine model has been designed. A 2-D finite element analysis (FEA) is used to simulate and validate the performance of the novel machine as a motor. The proposed topology shows better average torque than the existing sub-harmonic wound rotor brushless synchronous machine topologies.
Highlights
For the last few decades, the primal focus of scientists and researchers is to discover sustainable, clean, energy-efficient, and performance-enhanced technology in all respected fields in science and engineering to fight global warming and scarcity of fossil fuel resources
A cost-effective scheme for a BL-wound rotor synchronous machines (WRSM) using sub-harmonic excitation has been proposed in [16]. Another dual inverter 4 pole BL-WRSM machine based on the sub-harmonic excitation method presented in [17]. With this intension in mind, this paper proposes a novel sub-harmonic synchronous machine (SHSM) that exceeds the performance of the previously presented single inverter sub-harmonic BL-WRSMs [14,15] having the exact size, volume and machine rating
The brushless operation of the SHSM is ppoossssible bbyy uuttiilliizziinngg ssuubb--hharmonic magnetomotive force (MMF) components delivered from the stator XYZ winding to tthe rroottoorr hhaarrmmoonniicc wwiinnddiinng
Summary
Citation: Rafin, S.M.S.H.; Ali, Q.; Lipo, T.A. A Novel Sub-Harmonic Synchronous Machine Using Three-Layer Winding Topology. World Electr. Veh. J. 2022, 13, 16. https://doi.org/10.3390/ wevj13010016 Academic Editors: Syed Sabir Hussain Bukhari, Jorge Rodas and Jesús Doval-Gandoy Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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