设计了一款LED三角玻璃灯丝灯,利用艺术造型玻璃作为散热体与灯泡外壳,加长的LED灯丝光源由43颗芯片串联而成,由市电整流后直接驱动。LED灯丝的两个电极置于单端。用ANSYS有限元方法模拟了此款玻璃球泡灯丝灯在不同平均电流下的LED结温...设计了一款LED三角玻璃灯丝灯,利用艺术造型玻璃作为散热体与灯泡外壳,加长的LED灯丝光源由43颗芯片串联而成,由市电整流后直接驱动。LED灯丝的两个电极置于单端。用ANSYS有限元方法模拟了此款玻璃球泡灯丝灯在不同平均电流下的LED结温,采用正向电压法测量了此款玻璃灯的LED结温,结果表明:加长的LED灯丝可采用单端供电纯阻驱动,所设计的三角玻璃灯丝灯推荐使用的平均电流为10 m A,在此电流下结温为91.2℃,在保证使用寿命的前提下功率比传统灯丝球泡灯提高了25%。展开更多
This work focuses on transient thermal behavior of radial fins of rectangular,triangular and hyperbolic profiles with temperature-dependent properties.A hybrid numerical algorithm which combines differential transform...This work focuses on transient thermal behavior of radial fins of rectangular,triangular and hyperbolic profiles with temperature-dependent properties.A hybrid numerical algorithm which combines differential transformation(DTM) and finite difference(FDM) methods is utilized to theoretically study the present problem.DTM and FDM are applied to the time and space domains of the problem,respectively.The accuracy of this method solution is checked against the numerical solution.Then,the effects of some applicable parameters were studied comparatively.Since a broad range of governing parameters are investigated,the results could be useful in a number of industrial and engineering applications.展开更多
文摘设计了一款LED三角玻璃灯丝灯,利用艺术造型玻璃作为散热体与灯泡外壳,加长的LED灯丝光源由43颗芯片串联而成,由市电整流后直接驱动。LED灯丝的两个电极置于单端。用ANSYS有限元方法模拟了此款玻璃球泡灯丝灯在不同平均电流下的LED结温,采用正向电压法测量了此款玻璃灯的LED结温,结果表明:加长的LED灯丝可采用单端供电纯阻驱动,所设计的三角玻璃灯丝灯推荐使用的平均电流为10 m A,在此电流下结温为91.2℃,在保证使用寿命的前提下功率比传统灯丝球泡灯提高了25%。
文摘This work focuses on transient thermal behavior of radial fins of rectangular,triangular and hyperbolic profiles with temperature-dependent properties.A hybrid numerical algorithm which combines differential transformation(DTM) and finite difference(FDM) methods is utilized to theoretically study the present problem.DTM and FDM are applied to the time and space domains of the problem,respectively.The accuracy of this method solution is checked against the numerical solution.Then,the effects of some applicable parameters were studied comparatively.Since a broad range of governing parameters are investigated,the results could be useful in a number of industrial and engineering applications.
