为满足分离扇回旋加速器(SSC)对于磁场精度的需求,需对其主场电源进行改造.提出开关电源与线性电源相结合的方式作为SSC主场电源的改造方案.电源总体分为两部分,采用模块化的开关电源作为前级电压源,三极管线性调整电路作为后级模块的主电路,充分利用两种电源的优势,实现高稳定度、低纹波的电流输出,同时大幅度提升电源的功率密度和可靠性.文章介绍了电源的工作原理及改造过程,详细阐述了三极管线性放大原理以及管压降控制电路、输出电流控制电路的设计与实现,通过仿真对电路进行功能验证,最终在电源样机上进行实验测试.测试结果表明:改造后主场电源输出电流稳定度达到了±3.99×10?6,电流纹波达到了2.7×10?9,各项性能均优于改造前.

Power supply prototype in High Intensity heavy ion Accelerator Facility-Booster Ring (HIAF-BRing) adopts the scheme of full energy and fast cycle storage pulse power supply topology. Its multi modules are connected in series and parallel pattern, and the power reaches megawatt level. Due to the high power and large scale of the power supply, a module fault interlock protection system based on Programmable Logic Controller (PLC), interlock boards and Field Programmable Gate Array (FPGA) is designed and implemented to protect the power supply in operation. In this paper, first, a design of double redundant module fault interlock is introduced. Second, the logic implemented in PLC is described. Third, the work about FPGA is given. Finally, the system is tested in three aspects: the responsive time of the power supply interlock loop, the total time from controller error occurrence to interlock finish, and the equipment fault response. The result shows that the module fault interlock system can action sensitively, timely and reliably in case of fault occurrence, which meets the requirements of the power supply prototype in HIAF-BRing.

介绍了一种利用水诱导相分离促使普通PVDF转变成压电高分子的方法,并利用红外吸收光谱和X射线衍射对其进行表征和分析.在压电器件部分,测试了该材料制作的压电传感器的稳定性、线性偏差和响应时间.测试结果表明,该方法制备的PVDF传感器具有良好的稳定性;线性度良好,偏差在±5％以内,灵敏度为0.27 V/kPa;响应迅速,完全响应时间为200 ms.在应用部分,将该材料制成的传感器阵列成功应用于羽毛球拍,实现了羽毛球在球拍上击打的位置和力度的检测,并通过蓝牙实时传输至电脑,并在电脑上进行直观显示和记录.这一使用场景证明了PVDF柔性压电传感器将为可穿戴设备和智能硬件的发展带来更多的可能.