并联谐振长脉冲调制器的仿真研究
Simulation research on long pulse parallel resonant modulator
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摘要: 介绍了一种基于并联谐振波形叠加技术的长脉冲调制器，该结构采用多模块进行波形叠加(并联)，这样可以在纹波一定时，减小脉冲前沿，同时可以提高输出功率，单级结构采用并联谐振结构。为了稳定输出电压，且尽量减小开关损耗，采用频率和相位联合控制方式。对频率和相位联合控制、前馈稳压控制原理及谐振参数设计进行了说明，对基于上述原理的多级并联结构进行了仿真。仿真结果表明：输入直流电压在450~550 V变化时，3个变换器模块并联，谐振参数中心频率50 kHz，在5.2 kΩ负载上产生60 kV电压，上升沿约35 μs,输出电压能保持基本稳定,纹波小于4%。Abstract: This paper presents a long-pulse modulator based on parallel resonant waveform superposition technique, which uses multiple modules (in parallel) for waveform superposition to reduce rising edge while keep a certain voltage ripple and increase the output power, with each module using a parallel resonant structure. In order to stabilize the output voltage, and to minimize switching losses, the frequency and phase combined control method is applied. Its principle, feedforward voltage control principle and design of resonant parameters are described. The simulation of three modules in parallel shows that, with the input DC voltage varying within 450 to 550 V, the structure under forward control at 50 kHz resonant frequency generates 60 kV voltage on the 5.2 kΩ load resistor, whose rising ti
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Key words:
- parallel resonance /
- long pulse /
- modulator /
- waveform superposition /
- feedforward voltage control
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