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The objective of this paper is to investigate the design and optimization of a novel dual-rotor hybrid permanent magnet machine for traction application. The proposed dual-rotor hybrid synchronous PM machine synthesizes the synchronous reluctance and surface permanent magnet rotors into a single machine with the common shaft by using “inner-out” configuration. One feature of this hybrid machine is...
The goal of this paper is to investigate a proposed novel dual-rotor hybrid synchronous machine using two different types of rotors, i.e. the synchronous reluctance (SyR) and surface permanent magnet (SPM) rotors. Conventional design of dual-rotor machine utilizes SPM rotors on both inner and outer sides with toroidal winding configuration. However, there are limitations of using the permanent magnet...
The purpose of this paper is to investigate both the torque ripple reduction technique and influences of mechanical tolerance on the performances of a novel dual-stator 6/4 flux-switching permanent magnet machine. To minimize the torque ripple, step skew designs are studied to determine the optimal step number and step skew span angle. In addition, three common rotor mechanical tolerance deviation...
The purpose of this paper is to propose a novel flux-switching permanent magnet motor with an integrated airfoil-shaped rotor. Some of the conventional axial-flow compressor systems need an electric motor to provide mechanical energy input to the compressor. The proposed novel flux-switching motor-compressor can integrate both an electric motor and an axial-flow compressor into a single entity and...
This paper presents the study on a novel dual-stator 6/4 flux-switching permanent magnet (FSPM) machine for high-speed applications. Three different alternative topologies of dual-stator 6/4 FSPM machines are proposed and their performances regarding flux linkage, back electromotive force (back-EMF), torque density, and manufacturability are compared to the same specification of 10 kW and 15,000 rpm...
The purpose of this paper is to characterize the performance of a novel dual-stator six slot four pole (6/4) flux switching permanent magnet machine. The proposed dual-stator 6/4 topology eliminates even order harmonics in the flux linkage and back electromotive force, which are present in the conventional single stator topology. The resulting back electromotive forces of the proposed dual-stator...
This paper presents a closed-form design optimization of surface permanent magnet (SPM) machines using concentrated windings layout. Over the last few years, the interest in the use of SPM machines with a high pole number for low speed direct-drive applications has significantly increased. In this paper, the analytical design model is developed and particle swarm optimization (PSO) is applied for...
The purpose of this paper is to analyze the pulsating torque in squirrel cage induction machines by studying the stator slot and rotor bar dimensions. To mitigate the pulsating torque produced by the non-sinusoidal spatial distribution of magnetomotive force (MMF) and permeance in the air-gap, design options are evaluated at various stator and rotor slot dimensions and operating conditions. Analytical...
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