A close physical and functional integration of passive components is required to make an efficient and power dense overall system. Such power dense systems are a prerequisite in aerospace and marine applications. This paper presents a design of an integrated rotor-less inductor for the application of a 45kW aerospace starter-generator. The impact of high current density inductor is investigated and compared with traditional core inductor in terms of total weight and volume. Both inductors are sized using area product approach and its design parameters are validated using finite element analysis. Comparative analysis between the traditional core and the integrated inductor has shown a significant reduction in total weight and volume. The total weight of the integrated inductor is reduced by 55.4% whereas the total volume is reduced by 52.7% when compared to traditional air cooled core inductor.
In this paper, an analytical model aimed at reducing computational times for the analysis of classical synchronous generators is proposed and validated. While the proposed model's attractiveness comes from its simple and fast nature, however, it also features excellent levels of accuracy. This is achieved by the model's ability to consider aspects like saturation and space harmonics. Such features are usually investigated with computationally-heavy finite element analysis. The proposed method shows that an appropriate flux linkage map of all the machine windings as a function of currents and rotor position can be used to accurately consider these features at no cost of time or accuracy. Furthermore, the integration of the skewing effect within the model has also been proposed by incorporating it within the flux linkage map. The proposed method is investigated through the use of a 72.5kVA, wound field, salient pole synchronous generator. The results are compared with those of a finite element model and also against experimental measurements on a physical prototype. The advantages of the proposed procedure are discussed, where the model's suitability for carrying out lengthy and multiple simulations and its flexibility are highlighted.INDEX TERMS Harmonics, lookup tables, modelling, skewing effect, synchronous generators.
This paper investigates the accuracy of the subdomain modelling technique for high frequency copper loss calculation in stator windings of synchronous generators. The methodology's accuracy is studied at a slot level up to 10 kHz against FE model with realistic conductor dimensions. The analysis demonstrates that improper conductor area representation and eddy current reaction negligence causes increasing error with increasing frequencies. A modified subdomain model is then proposed to address these challenges which has proven to show a good match with a corresponding FE model.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.