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Most studies on permanent magnet synchronous motors (PMSMs) focus on either interior type or surface mounted magnet configurations and their design changes. This paper deals with the improvements on PMSMs' efficiency and performance after Halbach Array implementation by using meta-heuristic optimization algorithms. Analytical and numerical modeling of the motor are achieved and finite element method (FEM) is used for the numerical models. Particle swarm optimization & genetic algorithm were performed for the optimal design of the geometrical parameters of the permanent magnet (PM). The analytical and numerical results of the proposed design are compared to the analytical and/or numerical results of the reference motor. The improvements in efficiency, power/weight ratio, and cost are achieved with the optimized motor structure for the same motor requirements. [ABSTRACT FROM AUTHOR]

This study presents a comprehensive design procedure of a permanent magnet assisted synchronous reluctance machine (PMaSynRM) for replacing a permanent magnet synchronous motor (PMSM) in a commercial washer. The motors used in these applications have to perform efficiently on a wide speed range with constant-torque region for washing, and fieldweakening region for spinning. A design methodology is determined consisting of electromagnetic design, thermal/mechanical stress analysis, optimisation and prototyping. There are limitations and decisions on the initial design steps, considering the volume allocated for the machine, magnetic material and permanent magnet (PM) selection and the electromagnetic parameters for constant-torque and field-weakening regions. Design process is carried out following the initial parameter selection then the motor is produced and tested. Test results show that the PMaSynRM is 8.26% higher in volume and lower in power density than those of PMSM with a better field-weakening characteristic and fault tolerance. As a result, the authors proposed a methodology to design a PMaSynRM which becomes a good alternative for the mass produced home appliance motors since the materials' amount are decreased in 20% for silicon steel and 50% for PMs consequently decreasing the total cost and offering nearly the same efficiency and power density for the application. [ABSTRACT FROM AUTHOR]

Although three-phase induction motors are the most common motor type in industry, a growing interest has arisen in emerging electric motor technologies like synchronous reluctance motors and permanent magnet motors. Synchronous reluctance motors are a step forward compared to permanent magnet motors when the cost of the system is considered. The main focus of this study is low-power industrial applications, which generally use three-phase induction motors. In this study, the synchronous reluctance motor family is compared at three different power levels: 2.2 kW, 4 kW, and 5.5 kW. The aim of this study is to design and compare synchronous reluctance motors, which can be alternative to the reference induction motors. Finite element analysis is performed for the reference induction motors initially. Their stators are kept the same and the rotors are redesigned to satisfy output power requirements of the induction motors. Detailed design, analysis, and optimization processes are applied to the synchronous reluctance motors considering efficiency, power density, and manufacturing. The results are evaluated, and the optimized designs are chosen for each power level. They are prototyped and tested to measure their performance. [ABSTRACT FROM AUTHOR]