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The model reduction method for the finite element analysis such as the zooming analysis is conducted to calculate the AC copper loss of the high speed electric machines. In this paper, the result of the zooming method is validated by the complete analysis and the calculation speed increases by 7.8 times of the complete analysis. Moreover, the zooming method is applied to the analysis of the copper...
This paper describes an impact of a flux weakening current to an iron loss which includes a modulation index effect and PWM carrier effect. 1.5 kW IPMSM was selected as a test machine, the measured iron loss are analyzed and compared with the simulation results which are obtained by a coupled simulation between FEA and circuit simulator. Interesting results are shown in this paper such that the iron...
Pattern Oriented Modeling (POM) is an approach to bottom-up complex system analysis which was developed in ecology and for agent-based complex systems. This paper proposes a pattern-oriented agent-based simulation (POABS) approach to analyze agent-based complex system. We apply POABS to a history simulation domain to analyze a particular family line with more successful candidates in the civil service...
This paper presents a novel agent-based simulation model to analyze organization structures, which will show optimum possible performances against environmental and organizational changes. The model is a natural extension of the tag model of cultural assimilations proposed by Axelrod. Using the model, we investigate the landscape of "could be" space of organizations using random search....
Iron losses generated in PM motors can be estimated by the coupling analysis system between magnetic filed simulator and control simulator. As a result, the eddy current losses in magnets in the benchmark motor with PWM driving become more than 10 times of the result with sinusoidal current.
This work presents an effective electromagnetic field analysis using the finite element method for high frequency transformers with litz-wire. The Joule loss for the litz-wire can be accurately determined by considering both the skin effect and proximity effect. Efficient transformers can be designed by investigating both the impedance characteristics and the heat generation. We show the analysis...
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