基于嵌入式的超级电容器参数测量系统的研究

发布时间：2018-01-19 12:41

本文关键词： DSP FPGA 超级电容器大电流恒流并联均流双积分调节　出处：《天津大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着嵌入式技术及DSP、FPGA在超级电容器测试领域的应用不断深入,使得超级电容测试机的便携化大大加快。基于功率MOSFET的大电流控制技术已经基本成型,作为数字化技术领跑者的DSP、FPGA无可争议地取代了MCU(单片机)在超级电容器测试系统中的主导地位。基于这一背景,本课题提出并完成了基于嵌入式的超级电容器参数测量系统的研究。本文在深入分析超级电容器内部结构的基础上,提出了大电流恒流充放电的方法来实现测量,通过功率MOSFET并联扩大电流并恒定电流,通过双积分调节实现闭环控制,提高恒流精度。并对MOSFET并联均流进行了分析,对双积分调节模块做了祥述。根据设计的要求,论文确定了基于MOSFET的大电流恒流充放电测量方法的全套硬件、软件方案,实现了测量流程的精确控制,并且电压、电流可设置,能满足相应类型多种超级电容器的测试。在双积分调节控制中,其中内环积分调节通过硬件实现,使得调节过程连续,更能实时地调节。放电过程通过对超级电容器反向充电实现,这样才便于大电流恒流控制,提升了系统的整体性能,整套方案实现了先进技术与成熟原理的优势互补。构建了基于DSP+FPGA的控制系统,为流程控制和人机交互搭建了良好的硬件平台。设计并搭建测试过程参数的实时采集电路,实现了测量信息的高精度获取。外部IO由FPGA统一管理,便于系统扩展和完善。软件设计中采用功能模块化的设计方法,各控制模块分开管理,方便程序阅读和理解,且便于程序的更新升级。本文主要测量超级电容器的容量和内阻两个参数,由于其内阻一般在毫欧级,采取了很好的抗干扰措施以保证测量精度。在容量的测量中,通过双闭环控制提高恒流精度,进而保证了容量的测量精度。
[Abstract]:With the application of embedded technology and DSP FPGA in the field of super capacitor testing, the application of DSP FPGA in the field of supercapacitor testing is becoming more and more in-depth. The high current control technology based on power MOSFET has been basically formed as the leading digital technology of DSP. FPGA has indisputably replaced the dominant position of MCU in supercapacitor test system. Based on this background. In this paper, the parameter measurement system of supercapacitor based on embedded system is proposed and completed. Based on the deep analysis of the internal structure of the supercapacitor, this paper presents a method of high current constant current charge and discharge to realize the measurement, which expands the current and the constant current through the power MOSFET parallel connection. The closed loop control is realized by double integral regulation, and the accuracy of constant current is improved. The parallel current sharing of MOSFET is analyzed, and the double integral regulation module is described. According to the requirements of the design, the paper determines the full set of hardware and software scheme of the measurement method of high current constant current charge and discharge based on MOSFET, realizes the accurate control of the measuring flow, and the voltage and current can be set. It can satisfy the test of the corresponding type of supercapacitor. In the double integral regulation control, the inner loop integral regulation is realized by hardware, which makes the regulation process continuous. The discharge process is realized by reverse charging the supercapacitor, which is convenient for the high current constant current control and improves the overall performance of the system. The whole scheme realizes the complementary advantages of advanced technology and mature principle. The control system based on DSP FPGA is constructed. A good hardware platform is built for flow control and man-machine interaction. The real-time acquisition circuit of testing process parameters is designed and built. The high precision acquisition of measurement information is realized. The external IO is managed by FPGA. It is convenient to extend and perfect the system. The design method of function modularization is adopted in the software design, each control module is managed separately, it is convenient for the program to read and understand, and it is convenient to update and upgrade the program. In this paper, the capacitance and internal resistance of the supercapacitor are mainly measured. Because the internal resistance of the supercapacitor is generally in the milliohore level, good anti-interference measures are taken to ensure the accuracy of the measurement, and in the measurement of the capacity. The accuracy of constant current is improved by double closed loop control, and the accuracy of capacity measurement is ensured.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM53;TP368.1

【参考文献】