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Recently, the importance of development for improvement of a reliability and a performance in the electric power systems is increasing since the electric energy consumption growth. In general, experiments and simulations are used for design evaluations. But the simulations are recommended because the experiments need a lot of money and time. However, 3D simulations of the analysis methods are difficult and time is spent a lot of. And multiphysics for analyzing various physical phenomenons at the same time is difficult to realize. In this paper, 1D simulations of most economical analysis methods were used for developing high speed analysis program. Also multiphysics were composed to associate dynamics of the mechanism with pneumatic of the CB(Circuit Breaker). And the Matlab/Simscape was used to develop to make sure of a valid reliability in a initial stage of study.
In this paper, we propose the design of a micro-module robot enabling various locomotions. And we demonstrate the existence and non-existence of potentialities by using the finite element simulation and solving the inverse dynamics. This micro-module robot cannot only perform both the perpendicular and horizontal locomotions, but also it includes a mechanism to escape dangerous situations, mimicking a Armadillium vulgare themselves which is able to round the its body into a ball shape being protected from predator. The electromagnetic type segmented actuators are used to implement fast moving speed. The characteristics of the module actuators are studied by using FEA, and the feasibility of the proposed locomotion mechanisms are also demonstrated by solving the inverse dynamics.
Demands and trends in high voltage Self-blast circuit breakers are toward compactness and cost efficiency, so most of GIS designers prefer adequate computer simulation in the design phase in order to achieve compact size together with the performance of products. The stroke curve of moving contacts is considered as one of the essential data for a HVCB development and related simulation. For this reason, at the concept design stage, it is necessary to predict stroke data with sufficient precision prior to prototype manufacturing. For this purpose, a coupled fluid-mechanical dynamics analysis method is presented in this paper.
The previous design process for a High Voltage Circuit Breaker (hereafter HVCB) includes the steps of ‘basic design’, ‘production’, ‘testing’, and ‘commercialization’ for when a product achieved the targeted performance. If the targeted and satisfactory performance could not be obtained through testing, an improved design was derived through the results of Computer-aided engineering (hereafter CAE) analysis, and this testing process was repeated until the targeted performance was achieved. This process was consumed a significant amount of time and resources. However by utilizing Coupled Fluid-mechanical dynamics analysis, by being able to verify the basic functionality of the circuit brakers (hereafter CB) through pre-analysis before having to manufacture and test prototypes, it was not only possible to minimize the number of design revisions and test cycles required for the testing and manufacturing of the circuit breakers, but it was also possible to optimize the form of the circuit breaker based on the results obtained from CAE analysis in the initial design stages. For this purpose, this research paper proposes a method based on Coupled Fluid-mechanical dynamics analysis. This paper additionally introduces calculations with respect to the reaction forces of the Oil-dash pot (hereafter ODP), which have an obvious influence on the latter half section of actual travel curves.