摘要
死区时间选择的不合理会使逆变器件产生过高的浪涌电压和电流甚至损坏。针对这一问题提出了动态的零电压延迟控制技术,它监测输入供电电压和负载电流,当逆变器功率管达到期望的零电压开关(zero voltage switching,ZVS)条件时,控制功率开关管,使变换器几乎在整个工作条件下都能实现ZVS,而不需考虑输入电压、输出负载和元器件的容差,实现最佳的导通延迟时间。应用该技术的等离子体高频高压电源在纺织材料中的实际应用结果表明:该技术在进一步提高了电源效率的同时,减小了因不合理的死区时间带来的过高的浪涌电压和电流,改善了纺织材料表面改性涂层的性能。
Unreasonable selection of dead time can make inverting components to produce higher inrush voltage and current and even damaged. To solve this problem, we put forward a dynamic zero-voltage delay control scheme which can monitor input power supply and load current. When the expected zero voltage condition of inverting power tube is reached, a switching transition command power tube to make converter to implement ZVS almost on the whole condition and to provide optimal turn-on delay timing regardless of input voltage, output load and component tolerances. This technology is adopted in phase-shift controlled full-bridge series resonant high frequency and high voltage power supply for dielectric barrier discharge plasma. Practical application results indicate that the power efficiency can be increased, and the high inrush voltage and current can be decreased by inverter due to unreasonable dead time, thus the performance of modification coating on textile material surface is improved. Therefore, the dynamic soft switching dead time control can not only reduce the power consumption but also decrease the inrush voltage and current greatly so as to ensure the reliability of power components.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第11期2780-2785,共6页
High Voltage Engineering
基金
国防基础资助项目(A3820061199)~~
