Fast And Systematic Design Optimization Of Permanent Magnet Machines Using Novel 3 D Analytical Theories

Fast and Systematic Design Optimization of Permanent Magnet Machines Using Novel 3-D Analytical Theories

The permanent magnet synchronous machines (PMSM) has been an indispensable part of various systems in applications such as electric vehicles, compressors, portable power generation, high-speed, high precision motion stages, aerospace, and automation. The topology of PM machines can be classified into linear and rotary machines in either core- or coreless-type structure. In all topologies, an accurate calculation and the design optimization of electrical machines are two of the most important tasks for the machine designer. Although an accurate prediction of the magnetic field and electromagnetic performances can be achieved by finite element analysis (FEA), the numerical method is a time-consuming job without showing closed-form solutions. In particular, when optimization is involved, FEA requires an excessive computational time taking several weeks or even months owing to the repetitive calculations to provide the Pareto optimal set. Therefore, analytical models are still preferred for understanding fundamental physics, initial design, and optimization of the electrical machines, while the numerical methods are suitable for the verification and adjustment of the design. This thesis presents accurate analytical models for both linear and rotary surface PM (SPM) machines in either core- or coreless-type structure. The optimization for each topology has been formulated as a constrained multiobjective minimization problem to achieve the best compromise between the competing objectives. The optimization scheme used in the research is based on differential evolution (DE) and particle swarm optimization (PSO) algorithms. The validity of the analytical results is confirmed by finite element (FE) and experimental results, demonstrating an excellent agreement. Since FE method takes significantly long computational time, particularly when 3-D optimization is involved, the proposed model not only designs machines optimally but is also a useful tool to help both machine designers and drive system designers to make a system-level decision at the preliminary design stage.

Advanced Protection for the Smart Grid

Axial Flux Permanent Magnet Brushless Machines

Axial Flux Permanent Magnet (AFPM) brushless machines are modern electrical machines with a lot of advantages over their conventional counterparts. This timeless and revised second edition deals with the analysis, construction, design, control and applications of AFPM machines. The authors present their own research results, as well as significant research contributions made by others.