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박규남(K. N. Park),오동권(D. K. Oh),이광주(K. J. Lee),임성한(S. H. Rhim),민동균(D. K. Min) 한국소성가공학회 2015 한국소성가공학회 학술대회 논문집 Vol.2015 No.5
General machinability evaluation was done under various circumstances. It spent a lot of time to get an accurate evaluation results by doing lots of test. This research will find the influence on machinability from mechanical properties of material in order to minimize the cost of time. So we have been selecting the most compatible engineering plastic material to be used for the PCB test Module as the probe base. The hardness test, compression test and tension test were carried out to get the mechanical properties. The test method was observed by ASTM standard. But some test conditions followed different optional conditions for real processing conditions. Consequently, this study will propose for standardization which machinability evaluation can replace it from only mechanical properties.
강신영(S.Y. Kang),박규남(G.N Park),방성용(S.L. Park),김광헌(K.H. Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
In photovoltaic generation, PV module is used to generate the electricity, and this system has been in limelight as nonpolluting alternative energy source But, as energy density is low and PV module cost is high, there is a disadvantage that initial investment cost go up.<br/> In this study, we studied the method of allowing a tracker, adequate to photovoltaic generation, for increasing the generating We determined the proper error angle in order to decrease the repeating number of tracking without a reduction of the generating by using our developed simulator. And, we presented the photovoltaic approach tracking control and achieved its experiment. Through the result of experiment, it is expected that the fault rate and the consumption of electric power in a tracker get reduced and its cost become cut down<br/>