【作者】 周伟；

【导师】 刘钟阳；

【作者基本信息】 大连理工大学 ， 电工理论与新技术， 2017， 硕士

【摘要】 臭氧在环保、生活、医疗、工业等领域扮演着重要的角色,需求量日益增加。由于高频臭氧发生器容性负载的特殊性,电源与负载之间阻抗匹配不良会引起负载电流断续,电能传输能力下降;大量容性电流使得电能利用率降低,电源变压器输出功率增加,热损耗严重。针对以上问题,本文从分析容性负载瞬时伏安特性及动态特性入手,利用高频变压器漏感及负载两端并联电抗器形成匹配网络对上述难点进行研究,取得了如下主要研究成果。(1)针对负载电流断续现象,改变高频变压器漏感值分析并找到了产生断续现象的原因,总结了电源激励频率,漏感与负载之间形成的串联谐振频率二者之间匹配关系影响负载电流波形的规律。给出两种解决电流断续的方案,加以实验验证,成功解决了电流断续问题。在此基础之上,给出了高频变压器漏感取值的参考范围。(2)为解决电能传递过程中存在大量容性电流的问题,本文通过负载二端口网络虚部为零条件设计并联电抗器,为容性负载进行无功补偿。由于负载动态变化,对并联电感值进一步优化,使无功补偿效果更加理想。实验结果表明,并联电抗器之后,整机功率因数得到提高,电源变压器温升降低,提高了电能利用率,相同电源变压器带载能力提高一倍,臭氧发生器性能得到很好的提升。本文采用的阻抗匹配网络,成功实现了电能以较大能力且高效地传递到负载,并给出高频变压器匹配漏感设计的取值范围,归纳了激励频率与谐振频率的关系,利用并联电抗器成功实现了无功补偿,臭氧发生器的性能得到显著改善。更多还原

【Abstract】 Ozone plays an important role in environmental protection,daily life,medical treatment,industry,etc.Ozone generator demand is increasing.The research on ozone power supply and reactor has got many achievements.Due to the particularity of ozone load,bad impedance matching between power and load will cause load current discontinuous,power transfer capacity decreasing.Meanwhile,high portion capacitive current will decrease power efficiency,power factor and increase the ozone system temperature.Focusing on these issues,this paper analyzes impedance matching difficulties based on capacitive load transient voltage-current and dynamic characteristics.This research is based on setting up matching network between power and load,this network consists of leakage inductance of high frequency transformer and inductor paralleling with load.(1)Discontinuous current is found when changing matching leakage inductance value,which is analyzed and solved through changing relationship between load resonant frequency and power driving frequency.Two solutions are adopted,that is validated by experiments.How these two frequency affect current waveform is summarized,based on this solution,reference value of leakage inductor is derived.(2)To solve this issue high rated capacitive electrical energy exists during energy transfer.This paper designs inductor paralleling with load through imaginary part of two port network coming zero.This inductor provides reactive current for capacitive load to realize reactive power compensation.With optimization of inductance value,experiment results show that discharging power does not change,power factor gets improving,temperature rise is decreased,utilization rate of electrical energy is increasing.The performance of ozone generator gets better.This paper takes impedance matching network successfully realizing that electrical energy transfers from power supply to load with high ability and efficiency.The reference of leakage inductance is presented.Relationship between driving frequency and resonant frequency is summarized.Reactive power compensation is realized with paralleling inductance.The performance of ozone generator gets better.更多还原