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In this paper, a multi-objective optimisation procedure based on the non-sorted genetic algorithm-II (NSGA-II) for the design of a buried PM wind generators with variable-flux is presented. A comparative analysis is carried out for optimised 13 kW, 100 kW and 1 MW buried-PM variable-flux synchronous generators (VFSG) with PMs buried deep in the rotor cores and additional rotor field coils. A design...
Grid compliance is a crucial feature for modern wind turbine systems in power generation. The generator is one of the key components in a WTS. However, in order to predict the response of a directly grid connected wind generator to grid code requirements, an optimisation-based design over a large design space is needed. In this research, an analytical design model is developed for a grid compliant...
In this paper, an external-rotor switched flux hybrid switched flux memory machine (ER-SF-HMMM) with effective flux-concentration is developed. Due to external-rotor configuration, the stator design space is enlarged, and hence the geometric compromise existed in internal rotor (IR) counterpart is resolved. Thus, the proposed ER-SF-HMMM can perform higher torque capability and flux adjustability than...
In this paper a grid compliant variable-flux PM generator topology for wind turbine applications is proposed. An analytical comparative study of a series-double excited synchronous generator and an electrically excited synchronous generator (SG) is carried out with particular focus on the amount of MMF required to satisfy grid codes. A finite element based design optimization of the proposed generator...
This paper reviews recent technical trends in variable flux motors. Permanent magnet motor is a major component to realize high torque density with keeping high efficiency. However, when high speed revolution is required for further miniaturization, as well as the large torque in the low speed region, the flux yielded by the permanent magnet encounters a serious trade-off, i.e. the former needs less...
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