IEEE Transactions on Magnetics · 2008 · 98 citations · 10 references
EngineeringMechanical EngineeringMechatronics EngineeringFinite Element AnalysisMagnetic MaterialsMechatronic DesignElectromagnetic Torque ProductionFerromagnetismMagnetic ActuationMagnetic Circuit AnalysisPermanent Magnet MachinesPermanent MagnetsAir-gap Magnetic Field AnalysisElectromagnetic Torque CalculationFinite Element Magnetic AnalysisFinite Element Torque AnalysisMagnetic Torque ModelingSpherical Harmonic AnalysisTorqueTorque Production
We present a three-dimensional (3-D) torque model based on spherical harmonic functions of a Halbach array permanent-magnet (PM) spherical motor. Using the torque model, we show how to realize three-degree-of-freedom motion. We compare the Halbach array PM spherical motor and the conventional parallel magnet array spherical motor in terms of spherical harmonic component and amplitude of the torque. We discuss our study of variations of air-gap magnetic field with parallel magnetization directions along different spatial positions in each magnet segment. We also discuss the parasitic effect of the proposed spherical Halbach array magnet. We have verified our results by finite-element method.
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Torque Control of a Spherical Machine With Variable Pole Pitch
K. Kahlen, I. Voss, C. Priebe et al. · IEEE Transactions on Power Electronics · 2004 · 120 citations
Engineering, Electrical Engineering, Mechanical Engineering +17