【作者】 马天翔；

【导师】 田小建；

【作者基本信息】 吉林大学 ， 电路与系统， 2012， 硕士

【摘要】 本文的研究工作是围绕着设计一款能够输出50A脉冲电流的脉冲恒流源展开的。大功率脉冲恒流源应用领域非常广泛,它决定了被驱动系统的整体性能,越来越多的科研机构把精力投入到大功率脉冲恒流源的研制当中。国内这个领域的研究起步较晚、水平较低,技术上的落后制约多个相关领域的发展,大功率脉冲恒流源关键技术亟待解决。在参考国际一线厂家的产品参数以后,本文根据实际应用情况,提出了本设计想要达到的技术指标。并且根据所提出的技术指标,设计制作了各功能电路。主要包括触发脉冲电路、高速开关元件驱动电路、储能网络电路及调压电路等。详细地阐述了各单元电路的原理,分析了它们的特点,并且明确地绘制出了电路原理图。在电路焊接、调试之前,用仿真软件对脉冲恒流源的各个功能电路进行了仿真实验,在仿真中验证了论文的设计思想,得到的仿真数据对电路调试有很大的指导意义。在实验中,取得的实验数据契合理论分析和仿真实验的结果。在调试中取得了大量的实验数据,在与国外一线厂家的产品进行对比以后,发现系统的性能已经达到国外中端产品的技术水平,在脉冲宽度都是纳秒级的前提下,脉冲电流的幅度还远远高出所比对的产品。在调试过程中,发现电路的表现过于依赖MOSFET元件的性能,尝试着设计一种电路,能使输出不完全依赖MOSFET元件,设计出的互补输出电路有效的降低了电路的过冲、减小了脉冲下降沿的宽度。在实验的基础上,完成了大功率脉冲恒流源的样机制作。实现了脉冲电流的脉宽、幅度、频率可调,并且样机有内触发和外触发两种模式可选。样机的技术指标达到了论文之前预定的要求,有的则远远超过了预计指标的要求。在样机的调试和制作过程中,发现并解决了一些规律性的问题,为大功率脉冲恒流源的研制积累了宝贵的技术经验,同时收集了大量的实验数据,为进一步的研究工作打下了坚实的基础。在论文的最后部分,总结了实验中得到的结论,指出了论文中还有哪些方面的不足。并为下一步的工作提供了几个值得继续研究的方向。更多还原

【Abstract】 The research in this paper is mainly about how to design a50A high-power pulse constant current supply, which has been used widely in various fields.it is crucial to the whole system, a growing number of research institutions devote their energies to this area. In China, the researches on high-power pulse constant current supply started relatively late and is still in lower level, the key technical problem urgently awaits to be solved.Reference to the products which produced by international manufacturers, and according to the actual application, proposed the parameters of the pulsed driver. After this,designed the different part of pulsed driver circuit, they are pulse generator circuit MOSFET driver circuit、 stored energy circuit and DC/DC converting circuit. The principle of each part is also described, and analyzed their characteristics, also draw schematic.Before the actual circuit debugging, simulated the each functional circuit with pspice, to verify the circuit design, the simulation data was very significant to the actual circuit debugging.During the testing,the data that we got from the experiment dovetailed the theoretical analysis and simulation,after compared to products which producted by international manufacturers.we found our device reached the middle level of international products. On condition that pulsed width is located in ns level.the current magnitude of pulsed current is higher than the products contrastedIn debugging, we find that the output of the circuit rely on performance of MOSFET excessively, to solve this problem, try to design a new Complementary outputs circuit, which can reduce the overshoot of output、shrinks the width of pulse fall time. At last, the driver has been carried out and tested.Its pulse width、magnitude of current、frequency is adjustable.In addition,there is two mode of the trigger.The performance of driver reaches the required property index,some property even exceeds our expectation, such as the magnitude of current. In the process of testing,we found and solve someproblem, accumulated precious experience, also built the solid foundation for the further research.At the end of this paper, summarize the whole experiment, Certain limitations are also indicated,also pointed out the several direction that worth studying for the next step research.更多还原