Topological design and control algorithm for AC-Link high gain series resonant AC-DC converter
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摘要: 以AC-LinkTM能量变换的方式为基础，对变换器的拓扑结构和工作模式进行了改进，使谐振电路得以工作在双极性模式下，并基于新拓扑设计了相应的换流时序和控制算法，增强了变换器对三相输入电压波动的适应性，使其具备了理论上任意倍数的升压能力和高输入功率因数。利用Matlab/Simulink搭建了30 kW仿真模型，仿真结果显示，在三相电网输入、变压器变比1∶1及阻性负载的条件下，输出电压达到3 kV，升压能力达到了6倍。这表明该变换器具有大范围输出电压工作的能力。Abstract: Based on the AC-LinkTM energy conversion method, this paper improves the topology and working mode of the converter, so that the resonant circuit can work in bipolar mode, and designs the corresponding commutation timing and control algorithm based on the new topology, which enhances the adaptability of the converter to the three-phase input voltage fluctuation, so that it has the theoretical boost capability and high input power factor. Using Matlab/Simulink, a 30 kW simulation model was built, and the simulation results show that the output voltage reached 3kV and the boost capacity reached 6 times under the conditions of three-phase grid input, transformer ratio 1∶1 and resistive load, indicating that the converter has the ability to operate over a wide range of output voltages
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Key words:
- AC-Link /
- series resonance /
- AC-DC converter /
- state plane analysis /
- charge distribution
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图 8 低线电压、高线电压和等效激励电压
Figure 8. Low line voltage, high line voltage and equivalent excitation voltage
表 1 仿真模型参数
Table 1. Simulation model parameters
three-phase
voltage/Vresonant
inductor/μHresonant
capacitance/μFfilter
inductor/μHfilter
capacitance/μFload
resistance/Ωoutput
capacitance/μFtransformer
ratio380 18.1 0.14 10 10 300 20 1:1 
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