一种固态开关紧凑高压脉冲电源的设计与仿真

Design and Simulation of a Compact High-voltage Pulse Power Supply Using Solid-state Switches

为了满足运载工具对脉冲放电电源的需求,设计了一种利用车载蓄电池作充电电源,采用两级电感储能、电容传输能量的拓扑电路,脉冲变压器输出最大幅值30 kV、ns级上升沿(反应器负载)、高压脉冲重复频率1 kHz的用于放电处理汽车尾气的全固态开关紧凑型高压脉冲电源;分析了电源主电路工作原理,对电路的动态工作进行数学建模和解析求解,并用Matlab仿真给出一组典型的电源工作波形,为电源设计和元件参数选取提供了依据。在给定电路和负载参数下对电源工作进行PSpice仿真分析的结果表明,该方法能真实反映实际元器件参数对电路工作的影响;该电源能胜任一定范围的阻、感、容性负载下的工作,负载特性可用于电路设计的改进和用户参数的选取,特别是容性反应器负载的特性表明电源可用于汽车尾气的处理。

This paper presents a high voltage pulse power supply （PPS） using solid-state switches for automobile exhaust gas treatment. The proposed PPS has the topology of two stages of inductive energy storage, which is charged from 12V automobile storage battery. The middle storage capacitor is used as energy transfer component and the step-up pulse transformer is employed to provide high voltage pulses to the electrode of reactor for treating automobile exhaust gas. The work principle of the main circuit is analyzed, the dynamic running process is modeled and analytically solved and a set of typical simulation working waveform is provided by the Matlab. The results can he used for the design of PPS circuit and the choice of components and their parameters. In order to consider the influence of real parameters of components, especially the solid state opening switch, the PSpice simulation method is adopted for obtaining the working waveforms and the output characteristic for all kinds of loads. It is indicated that the PPS can be operated under a range of various loads, including resistive, inductive and capacitive loads. The output characteristic can be used to improve the design of circuit and the selection of parameters for user. The output pulse voltage with 200ns rise time, 30kV amplitude, 1μs pulse width and lkHz repetition rate is gained for the reactor load with equivalent circuit parameter of 10pF capacitor and 1MΩ resistor in parallel connection, which proves that the PPS can be applied to clean the automobile exhaust gas.