放空火炬高频点火系统设计  

The design of high-frequency ignition system of release flare

作　　者：周篷[1] 蒋林[1] 杨高鹏[1] 周龙[1] 杨旭[1] 

机构地区：[1]西南石油大学电气信息学院,四川成都610500

出　　处：《微型机与应用》2017年第4期4-6,17,共4页Microcomputer & Its Applications

摘　　要：针对传统放空火炬的高压电子点火系统电极易腐蚀的问题,提出了一种基于感应加热原理的新型点火系统。该电源系统的主拓扑为全桥谐振结构。通过检测负载电流与电压的相位差,利用脉冲频率调制(PFM)方式使电源工作频率实时跟踪锁定负载的固有频率,利用数字信号处理(DSP)在软件上实现数字锁相环,让电源工作在弱感性状态。基于TI公司的TMS320F28335控制芯片,搭建了点火系统的控制平台。仿真和实验结果表明,控制算法能够实现工作频率对固有频率的准确跟踪锁定,且在弱感性工作状态下,电源输出满足设计指标,具有较小的开关损耗。Aiming at the problem of electrode corrosion for traditional flare high-vohage electronic ignition system, an induction heating based ignition system is proposed. The main topology of the power system is a full-bridge resonance structure. After detecting phase difference be- tween load current and voltage, the work frequency of the power supply would track the load natural frequency timely by using Pulse Frequency Modulation （PFM） , and then realize Digital Phase Locked Loop （DPLL） in software through digital signal processing （DSP） , which makes the power supply work in weak inductive state. Based on TMS320F28335 controller of TI, the ignition system is built. The results of both simu- lation and test show that the proposed control algorithm can realize the accurate tracking lock, and the output of power supply can satisfy the de- sign objective under the work state of weak inductive with low switching loss.

关 键 词：感应加热 串联谐振 DSP 数字锁相环 SABER 

分 类 号：TN86[电子电信—信息与通信工程]