雙向預充控制RSD低能耗觸發(fā)電路研究
[Abstract]:The development of pulse power supply depends on the development of switching devices to a great extent. Traditional pulse power switches have the disadvantages of limited voltage and current stress, low repetition rate, short life, and poor synchronicity. However, the reverse switching transistor (RSD (Reversely Switched Dynistor) is the most promising substitute in semiconductor switches. RSD is capable of realizing tens of kV high voltages and hundreds of Ka large currents. The microsecond nanosecond turn on three perfect unity, and can realize the whole area synchronous conduction, easy to form the reactor, but according to the RSD unique trigger drive characteristic, the research its reliable trigger technology, is guarantees the RSD high power pulse power supply high efficiency, The key to stability. Firstly, the structure characteristics and trigger principle of RSD are introduced, and two conditions for normal conduction of RSD are described: reverse precharge current can accumulate a certain amount of precharge charge for RSD; The time when the magnetic switch blocks the forward discharge of the main circuit matches the reverse precharge time of the RSD. On this basis, four typical RSD trigger circuits are introduced, and their advantages and disadvantages are compared. Secondly, aiming at the trigger energy consumption of RSD, a new type of RSD bi-directional precharge trigger circuit is proposed. The circuit can reduce the trigger energy consumption on the basis of ensuring the reliable trigger of RSD, and support RSD to realize the modularization of series reactor. In this paper, the design and optimization of the main circuit parameters are realized by analyzing the working principle of the bidirectional precharge trigger circuit and establishing the reverse trigger model. Then, in order to realize the pulse power discharge system, the related devices are selected according to the trigger requirements, and the solutions to the compact and insulating requirements of the trigger circuit are put forward. At the same time, the design of magnetic switch and magnetic reset circuit which can guarantee the reliable conduction of RSD is introduced in detail. The trigger of control circuit is realized by DSP programming. In this paper, a constant current high voltage charging power supply is used as the capacitor charge in the trigger circuit. The charging voltage is high and the control is flexible, which can meet the requirements of multi-module RSD trigger discharge. At last, the experiment platform of high voltage pulse discharge system is built, and the reliable conduction of 1200V RSD series reactor is realized, and the feasibility of RSD bidirectional precharge trigger circuit is verified by experiment. Compared with the traditional resonant precharge scheme, the new trigger circuit can reduce the trigger energy consumption.
【學位授予單位】:燕山大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:TN323.6;TN783
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