【摘要】 在基本单周期控制基础上,提出一种单相半桥脉冲宽度调制变换器改进单周期控制算法,引进桥臂电容电压差值变量,构建桥臂电容电压闭环控制,明显改善了基本单周期控制算法应用在单相半桥脉冲宽度调制变换器中桥臂电容电压严重不平衡的问题,限制了桥臂电容中心点电压波动范围,使变换器系统稳定性增强,增强了带载能力,同时实现交流侧高功率。在理论分析的基础上,对控制算法进行了系统的建模仿真,仿真结果表明单相半桥变换器能改进单周期控制算法的有效性。更多还原

【Abstract】 An improved one- cycle control algorithm was applied in single- phase half- bridge PWM converter. It was based on the basic one- cycle- controlled algorithm. The difference between the variable capacitor voltage arms was introduced to build the bridge arm capacitor voltage closed- loop control. This algorithm can improve the imbalance of the arm capacitor voltage in single- phase half- bridge PWM converter,and limit the fluctuation range of the center of the bridge capacitor voltage. So the stability and the load capacity of the system could be enhanced. The high power factor in the AC side was achieved.Based on the theoretical analysis of this algorithm,system simulation was realized to demonstrate the effectiveness of this algorithm.更多还原