基于PI-DPLL复合控制的高频逆变电源研究  

Research on HF-Inverter Power Supply based on PI-DPLL

作　　者：惠晶 臧小惠[2] 张峰久 

机构地区：[1]江南大学,江苏无锡214122 [2]常州轻工职业技术学院,江苏常州213164

出　　处：《电力电子技术》2007年第2期32-34,共3页Power Electronics

摘　　要：针对高频逆变电源频率跟踪中的不足,提出了一种基于比例积分(PI)和数字锁相环(Digital Phase-LockedLoop,简称DPLL)相结合的复合控制方法。在动态条件下,当逆变器开关频率与负载固有谐振频率的误差值大于或等于偏差规定值时,采用单纯的PI控制,快速地将逆变器的开关频率引入锁相范围;当频率误差值小于偏差设定值时,采用DPLL控制,使逆变器在稳态条件下始终工作于负载谐振或准谐振状态。在分析高频逆变电源工作原理的基础上,详细介绍了PI-DPLL的复合控制策略及DPLL的软件实现,推导出DPLL的数学模型,进行了稳定性分析。最后,对采用PI-DPLL控制的逆变电源动态过程进行了仿真分析,在一台直流输入电压为310V,输出频率为30kHz,功率为4kW的串联谐振逆变器电源中得到验证。仿真和实验结果均表明,基于PI-DPLL复合控制的高频逆变电源具有动态响应快,稳态精度高的特点。To overcome some disadvantages in conventional high frequency tracking system,a HF-Inverter using the Digital Phase-Locked Loop（DPLL） technique in cooperated with PI controller is presented in this paper.When the error between operating and desir-able frequencies of the proposed inverter is greater than or equal to the presetting one,only PI controller is utilized to pull rapidly the operating frequency into the Phase-Locked Loop（PLL） locking range.Otherwise the output frequency or phase of the inverter is controlled only by the digital phase-locked loop when the error is smaller than the presetting value.Therefore,the inverter always operates in the load-resonant or quasi-load resonant condition in steady-state.The simulative and experimental results showed that the HF-Inverter power has fast dynamic response and high steady precision.

关 键 词：逆变器 频率 跟踪 锁相环控制 

分 类 号：TM464[电气工程—电器]