半桥变换器桥臂电压平衡控制方法的研究  

Research on control method of arm capacitance voltage balance in half-bridge converter

作　　者：孟渊[1] 吴临玉 武荣[1] MENG Yuan;WU Linyu;WU Rong(Lanzhou Institute of Physics,Lanzhou Gansu 730000,China)

机构地区：[1]兰州空间技术物理研究所,甘肃兰州730000

出　　处：《电源技术》2023年第6期808-811,共4页Chinese Journal of Power Sources

摘　　要：针对半桥电路在已有峰值电流控制中的电容电压不平衡的问题,对其原因进行了分析。介绍了一种通过电荷控制同时进行电容电压平衡控制和电感电流反馈控制的方法。对半桥电路的电荷控制方法建立了控制模型,并对双闭环控制稳压电源的内外传递函数给出了通用的表达式。对建立的控制模式进行了预测结果与测试结果的比较。测试结果表明本文提出的控制方法可以稳定控制半桥电路电容电压,建立的控制模型可以准确预测电路传递函数。The reasons for the problem of unbalanced capacitance voltage in the existing peak current control of the half-bridge circuit were analyzed.A charge control method combined with capacitance voltage balance control and inductor current feedback control was introduced.A control model was established for the charge control method of half-bridge circuit,and a general expression was given for the internal and external transfer functions of the double closed-loop control regulated power supply.The predicted results and circuit simulation results of the established control model were compared.The test results show that the proposed control method can stably control the capacitance voltage of the half-bridge circuit,and the established control model can accurately predict the circuit transfer function.

关 键 词：开关电源 半桥 电容电压平衡 电流模式 电荷控制 

分 类 号：TM911[电气工程—电力电子与电力传动]