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    • Non‐linear Analytical Modelling and Optimisation of a 12/8 Rotor Excited Flux‐switching Machine

    Akbar Mohammadi Ajamloo,Aghil Ghaheri,Hossein Shirzad,Ebrahim Afjei

    IET ELECTRIC POWER APPLICATIONS（2020）

    Cited 12|Views3
    Abstract
    Rotor excited flux-switching permanent magnet machines (REFSPMs) have been recently introduced exhibiting high power density and low permanent magnet consumption. Despite the advantages, 12/8 configuration of REFSPM has an intrinsic unbalanced voltage waveform due to the existence of even-order harmonics. Aiming to improve the machine voltage THD, using notches on the rotor segments is proposed. To study the effects of the rotor notch on machine performance with low computational time, the non-linear magnetic equivalent circuit is developed taking into account the effects of fringing fluxes, iron saturation, and rotor transition. An optimisation procedure based on Taguchi method is applied to minimise the voltage THD value taking the effects of uncontrollable factors into account. Finally, the REFSPM is prototyped and the measured results are compared with the analytical and numerical results.
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    Key words
    torque,permanent magnet machines,magnetic circuits,rotors,optimisation,equivalent circuits,magnetic flux,finite element analysis,electric potential,permanent magnet motors,Taguchi methods,harmonic distortion,rotor excited flux-switching permanent magnet machines,optimisation,rotor transition,fringing fluxes,nonlinear magnetic equivalent circuit,low computational time,machine performance,rotor notch,rotor segments,machine voltage THD,intrinsic unbalanced voltage waveform,low permanent magnet consumption,exhibiting high power density,REFSPM
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