【摘要】 针对传统LLC谐振电路在电能转换过程中，仍需要先将交流电转换为直流电，再进行直流转换的问题，本文提出一种基于交流链接技术的LLC谐振变换器的拓扑结构及相应的控制方法。该拓扑结构通过变频的控制策略可以实现将三相交流电转换为直流电，且输入电流具有较高的功率因数和较低的谐波电流，输出电压具有较好的调节能力。之后建立了Matlab/Simulink仿真模型，对输入为380 V三相交流电、输出为500 V的1 kW的变换器进行了验证，仿真结果表明该拓扑结构功率因数可以达到0.99,输入电流总谐波为2.31%,输出电压误差小于1%。最后搭建实验样机进行测试，实验结果证明了拓扑结构及控制算法的可行性。更多还原

【Abstract】 To address the problem that the traditional LLC resonant circuit still needs to convert AC to DC before DC conversion in the process of power conversion, this paper proposes a type of topology of LLC resonant converter based on AC-Link technology with corresponding control method. The topology can convert three-phase AC power to DC power by the control strategy of frequency conversion, and the input current has high power factor and low harmonic current, while the output voltage has excellent regulation ability. Finally, a Matlab/Simulink simulation model is established and a 1 kW experimental prototype with 380 V three-phase AC input and 500 V output is built for verification. The results show that the power factor of this topology can reach 0.99, the total harmonics distortion of the input current is 2.31%, and the output voltage error is less than 1%. Finally, the experimental prototype is constructed to test, and the experimental results prove the feasibility of the topology and control algorithm.更多还原