Zhentao S. Du

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This paper proposes a Wound-Rotor Brushless Doubly Fed Induction Machine (WRBDFIM), an alternative Brushless Doubly Fed Induction Machine (BDFIM) concept for wind turbine applications. The WRBDFIM consists of two separate machine winding sets different in pole-numbers, whose rotor windings are connected together. Both of the winding sets are housed in the(More)
This paper proposes a new interior permanent-magnet machine (IPMM) design in which the rotor consists of several rotor segments arranged in the axial direction, aiming to improve the utilization of rare earth permanent-magnet (PM) materials and reduce the torque ripple. The proposed design is optimized to feature a <inline-formula> <tex-math(More)
This paper proposes a low-speed dual-stator spoke-type vernier permanent magnet motor (DSSVPMM) using ferrite permanent magnets (PMs). The machine is designed and verified by finite element (FE) analysis. The final design is compared against a commercial industrial interior permanent magnet machine (IPMM) using rare earth PMs and a single air gap vernier(More)
This paper focuses on the design and analysis of an ultra-high speed axial flux permanent magnet (AFPM) machine for aerospace flywheel energy storage system. The superiority of the proposed AFPM machine is the material-efficient permanent magnet (PM) shape which contributes to obtain a sinusoidal back-electromotive-force (back-EMF) and hence reduces torque(More)
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