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Purpose – This paper aims to focus on the hybrid numerical method for effective design of silicon micromotor. Design/methodology/approach – In this work, the authors introduced finite element methods combined with LUA and Matlab. The paper focuses on analysis of electrostatic micromotor and uses computer simulation procedure leading to new structure design. Findings – This strategy enables changing of all parameters of the micromotors MEMS. Moreover, this strategy allows for taking advantage of FEM, namely possibility of calculations of complicated geometries (different electromagnetic devices too) without additional operations. Originality/value – A novel strategy in computer modeling of micromotor MEMS, based on the fast and very efficient hybrid method for analysis and design, is proposed. [ABSTRACT FROM AUTHOR]

Purpose – The purpose of this paper is to propose an efficient numerical simulation tool based on FEM, by which the EMC shielding effect characteristics of power cables can be predicted in the 30-1,000 MHz frequency range, as if it would be measured by the absorbing clamp method. Design/methodology/approach – The simulation method is based on decomposition: a 2D axisymmetric RF FE model is used for describing the whole measurement set-up, while a 3D quasi-static FE model is used for the symmetry cell of the shielding layer in order to capture the effect of its fine geometric details. Findings – Comparison with real measurements shows that the shielding characteristics can be reliably predicted this way, with some deviation in the low end of the frequency range though. Practical implications – This simulation tool can be applied in the design and optimization of braided cable shields to be used in the automotive industry. Originality/value – Two numerical models are coupled by the novel concept of "equivalent shielding layer", which is obtained by homogenization. [ABSTRACT FROM AUTHOR]