Vishay推出新的功率等级达10W且采用2818外形尺寸的汽车级Power Metal Strip电阻WSHP2818。Vishay Dale WSHP2818在较小的占位面积内具有与尺寸更大电阻相当的高功率,在汽车、工业、消费和计算机产品中能节省空间,减少元器件数量,而且...Vishay推出新的功率等级达10W且采用2818外形尺寸的汽车级Power Metal Strip电阻WSHP2818。Vishay Dale WSHP2818在较小的占位面积内具有与尺寸更大电阻相当的高功率,在汽车、工业、消费和计算机产品中能节省空间,减少元器件数量,而且用表面贴装替换引线电阻能大大加快组装速度。新发布的器件采用独有的结构,这种结构改进了热管理设计,使这颗10W电阻在2818封装尺寸内还能保持Power Metal Strip结构的优良电气特性。展开更多
Vishay宣布,发布新的汽车级Power Metal Strip?电池旁路电阻——WSBS8518...14。该电阻的功率密度达到36W,采用8518外形尺寸,在接头上镀锡。Vishay Dale WSBS8518...14的电阻值低至50μΩ,测量精度比霍尔效应的电流检测方案高,而成本更...Vishay宣布,发布新的汽车级Power Metal Strip?电池旁路电阻——WSBS8518...14。该电阻的功率密度达到36W,采用8518外形尺寸,在接头上镀锡。Vishay Dale WSBS8518...14的电阻值低至50μΩ,测量精度比霍尔效应的电流检测方案高,而成本更低,镀锡的接头便于PCB组装,同时也提高了耐腐蚀能力。展开更多
On account of limited knowledge of the breakup of power law liquid film, the process of its disintegration and atomization was studied by using a planar liquid film. A linear stability analysis was adopted to predict ...On account of limited knowledge of the breakup of power law liquid film, the process of its disintegration and atomization was studied by using a planar liquid film. A linear stability analysis was adopted to predict the breakup characteristics of the power law film. The predicting formulas of stripping breakup length and diameter of ligament were put forward presently. Through high-speed photography and laser light sheet illumination,different breakup characteristics of flat power law film under different conditions were derived. The characteristic dimension of breakup regimes were defined and extracted. The effects of several parameters(injection pressure,ambient pressure, nozzle structure and fluid property) on the stripping breakup length and spray angle were investigated. The results revealed that increasing both the velocity of liquid film and the ambient pressure facilitated the breakup of film, reduced the stripping breakup length and enlarged the spray angle in different extents. The comparison between theoretical and experimental results was conducted to validate the feasibility of the linear stability theory.展开更多
Purpose The high-energy photon source(HEPS)is the first fourth-generation synchrotron photon source in China(Jiang et al.in Sci Sin Phys Mech Astron 44:1075-1094,2014).The strip electrode and its power supply provide ...Purpose The high-energy photon source(HEPS)is the first fourth-generation synchrotron photon source in China(Jiang et al.in Sci Sin Phys Mech Astron 44:1075-1094,2014).The strip electrode and its power supply provide necessary hardware support for correcting the magnetic field of the wiggler as reported by Zhao and Yin(Particle accelerator technology,Higher Education Press,Beijing,2006).The design of the conventional power supply for accelerators,with a large output current and high output voltage,making it easy to achieve high stability of the output current.The strip electrode power supply poses difficulties in achieving high stability due to its small output current and voltage.Because of size limitations,as well as the requirements of the power architecture,there are currently no commercial products for this type of power supply.Methods Designed and developed 32 strip electrode power supplies.Considering the large number of power supplies and limited space,a rack structure design was adopted,placing all power supplies in one rack.The main circuit of the power supply adopts a full bridge transformation structure(Chao et al.in Radiat Detect Technol Methods 6:470-478,2022),and the control scheme adopts full digital control based on FPGA(Long and Cheng in At Energy Sci Technol 43:780-784,2009).The power supply has two control modes:local operation and remote operation as reported by Lu(Particle accelerator technology,Hunan University,Changsha,2010).Results The test shows that all power supplies meet the indicator requirements,with a stability of less than 100 ppm.Conclusions The strip electrode power supply can effectively correct the multipole integral field error and improve the integral field performance of the wiggler.展开更多
文摘Vishay推出新的功率等级达10W且采用2818外形尺寸的汽车级Power Metal Strip电阻WSHP2818。Vishay Dale WSHP2818在较小的占位面积内具有与尺寸更大电阻相当的高功率,在汽车、工业、消费和计算机产品中能节省空间,减少元器件数量,而且用表面贴装替换引线电阻能大大加快组装速度。新发布的器件采用独有的结构,这种结构改进了热管理设计,使这颗10W电阻在2818封装尺寸内还能保持Power Metal Strip结构的优良电气特性。
文摘Vishay宣布,发布新的汽车级Power Metal Strip?电池旁路电阻——WSBS8518...14。该电阻的功率密度达到36W,采用8518外形尺寸,在接头上镀锡。Vishay Dale WSBS8518...14的电阻值低至50μΩ,测量精度比霍尔效应的电流检测方案高,而成本更低,镀锡的接头便于PCB组装,同时也提高了耐腐蚀能力。
基金Supported by the National Natural Science Foundation of China(11172205,11372219,51176137)
文摘On account of limited knowledge of the breakup of power law liquid film, the process of its disintegration and atomization was studied by using a planar liquid film. A linear stability analysis was adopted to predict the breakup characteristics of the power law film. The predicting formulas of stripping breakup length and diameter of ligament were put forward presently. Through high-speed photography and laser light sheet illumination,different breakup characteristics of flat power law film under different conditions were derived. The characteristic dimension of breakup regimes were defined and extracted. The effects of several parameters(injection pressure,ambient pressure, nozzle structure and fluid property) on the stripping breakup length and spray angle were investigated. The results revealed that increasing both the velocity of liquid film and the ambient pressure facilitated the breakup of film, reduced the stripping breakup length and enlarged the spray angle in different extents. The comparison between theoretical and experimental results was conducted to validate the feasibility of the linear stability theory.
文摘Purpose The high-energy photon source(HEPS)is the first fourth-generation synchrotron photon source in China(Jiang et al.in Sci Sin Phys Mech Astron 44:1075-1094,2014).The strip electrode and its power supply provide necessary hardware support for correcting the magnetic field of the wiggler as reported by Zhao and Yin(Particle accelerator technology,Higher Education Press,Beijing,2006).The design of the conventional power supply for accelerators,with a large output current and high output voltage,making it easy to achieve high stability of the output current.The strip electrode power supply poses difficulties in achieving high stability due to its small output current and voltage.Because of size limitations,as well as the requirements of the power architecture,there are currently no commercial products for this type of power supply.Methods Designed and developed 32 strip electrode power supplies.Considering the large number of power supplies and limited space,a rack structure design was adopted,placing all power supplies in one rack.The main circuit of the power supply adopts a full bridge transformation structure(Chao et al.in Radiat Detect Technol Methods 6:470-478,2022),and the control scheme adopts full digital control based on FPGA(Long and Cheng in At Energy Sci Technol 43:780-784,2009).The power supply has two control modes:local operation and remote operation as reported by Lu(Particle accelerator technology,Hunan University,Changsha,2010).Results The test shows that all power supplies meet the indicator requirements,with a stability of less than 100 ppm.Conclusions The strip electrode power supply can effectively correct the multipole integral field error and improve the integral field performance of the wiggler.
