基于脉冲阻塞原理的波头连续型三相交-交变频系统研究  

Three Phases Cycloconverter with Continuous Wave Heads Based on Plugged Pulse Principle

作　　者：郑诗程[1] 邓荣军[1] 陈玲[1] 

机构地区：[1]安徽工业大学电力电子与运动控制重点实验室马鞍山243032

出　　处：《电工技术学报》2012年第5期149-155,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50707003)

摘　　要：详细分析比较了当前交交变频技术的特点,在此基础上提出了基于脉冲阻塞原理的波头连续型三相交-交变频原理,并进行了仿真和实验研究。通过对传统三相交流调压电路拓扑的合理改造,得到了新型的三相交-交变频电路拓扑结构。通过控制功率器件的周期性导通和关断以及高频斩控信号的占空比,实现了输出电压的频率、幅值分别或同时可调,并且波形具有良好的正弦度。根据面积等效原理,分别对等脉宽和变脉宽斩波控制方式进行了详细的理论分析,推导出了两种控制方式下的相应占空比的数学表达式。在PSpice环境下分别进行了等脉宽和变脉宽斩波控制方式的三相AC-AC系统仿真研究,并进行了相关负载实验。仿真和实验结果一致,并且与文中的理论分析结果也完全一致,从而验证了本文提出的三相交交变频原理的正确性与可行性。The characteristic of present AC-AC converter technology is analyzed in this paper, and the AC-AC converter with continuous wave heads based on plugged pulse principle is presented. Some simulation and experimental researches are carried. After the traditional circuit topology of three phases ac voltage-adjusted is altered properly, a new type of three phases AC-AC converter circuit topology is attained. The frequency and amplitude of output voltage are adjustable respectively or simultaneously through turn-on and turn-off of power devices. The waveform of output voltage is more approximate to sinewave when the duty cycle of high frequency chopping signal is changed regularly according to the sine rule. The chopping control fashion of equal pulse width and variable pulse width are analyzed particularly according to the area equivalent theory. The algorithmic expressions of duty cycle with two kinds of control fashion are deduced out. On the foundation of the above contents, three phases AC-AC converter system is simulated under the environment of PSPICE,and the valid experiments are completed. The simulation results are in consistent with experimental results, and the same as the theory analysis entirely. So the new principle of three phases AC-AC and topology in this paper is verified to be proper and feasible.

关 键 词：脉冲阻塞 三相交-交变频 等脉宽控制 变脉宽控制 占空比 斩波控制 

分 类 号：TM921.2[电气工程—电力电子与电力传动]