Comparison of Three-Phase and Six-Phase High-Power Ultra-High-Speed Machine for Portable Mechanical Antenna

• Published in: 2022 IEEE Applied Power Electronics Conference and Exposition (APEC) pp. 167 - 174
• Main Authors: Islam, Md Khurshedul, Tasnim, Kazi Nishat, Choi, Seungdeog, Singh, Prashant
• Format: Conference Proceeding
• Language: English
• Published: IEEE 20.03.2022
• Subjects: Analytical models; Density measurement; finite element analysis (FEA); mechanical-based antenna; Multiphysics analysis; permanent magnet machine; Power system measurements; Prototypes; Shafts; six-phase machine; Torque; Ultra high speed machine; Wireless communication
• ISSN: 2470-6647
• DOI: 10.1109/APEC43599.2022.9773684

One of the emerging applications of the ultra-high-speed machine (UHSM) is a mechanical-based antenna (AMEBA) for portable wireless communication in the RF-denied environment. With higher power density, efficiency, and lower torque pulsation, the multi-phase UHSM can be a better substitute compared to the conventional three-phase UHSM in the AMEBA application, where portability and efficiency are the top priority. This paper presents the comparison of the three-phase and six-phase UHSM in terms of the design and performance characteristics, considering their use in a safety-critical AMEBA application. For a fair comparison, both models are designed using the same multi-physics design process. The models are optimized to maximize the efficiency, power-density, and design-safety-margin with multi-disciplinary constraints of the AMEBA system. Both models' key performances, such as the torque profile, efficiency map, back-electromotive force (EMF), temperature distribution, and developed stress, are compared by intensive simulation using finite element analysis (FEA). Finally, the optimized three-phase and six-phase UHSM prototypes (2 kW rated shaft power at 500 000 r/min) are fabricated with the same volume and same rotor geometry to validate the simulation results.