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This paper discusses the problem of obtaining electric machines (EM) for high performance electric drives (HPED) used in more electric architecture (MEA) applicable to aircraft, spacecraft, and military ground vehicles. The HPED are analyzed by those aspects of six sigma theory that relate to critical-to-quality (CTQ) subjects. Using this approach, weight, volume, reliability, efficiency, and cost CTQ are addressed to develop a balance among them, resulting in an optimized system. The influence of machine controllers and system considerations is discussed. As a part of the machine evaluation process, speeds, bearings, complexity, rotor mechanical and thermal limitations, torque pulsation, current, and power densities, are considered. A methodology for electric machine selection is demonstrated. An example of high-speed, high-performance machine application is shown. A system approach is used for overall electric machine selection and optimization. The presented material is a synopsis of the extensive engineering experience accumulated in Honeywell International.
Evgeni Ganev (Fri,) studied this question.