本文選題：磁耦合共振　切入點：無線輸電　出處：《蘭州理工大學》2014年碩士論文　論文類型：學位論文

【摘要】：用電設備以非接觸的方式獲取電能的技術稱為無線電力傳輸技術。其使得用電設備擺脫了型號復雜的充電器和降低設備密封性的電源接口,同時可以避免插拔接頭所產(chǎn)生的電火花等傳統(tǒng)導線式輸電方式的弊端,所以無線輸電方式具有極大的便捷性和安全性。傳統(tǒng)的感應式無線輸電技術,如手機的無線充電底座、電動牙刷充電,其具有傳輸距離短、傳輸功率小、散熱難等問題。論文所研究的磁耦合共振型無線輸電系統(tǒng)是在2007年提出的新型無線輸電技術,其具有傳輸距離遠、傳輸功率大、選擇性傳輸?shù)葍?yōu)勢,其大大的拓寬了無線輸電的應用領域。隨著電動汽車的迅速發(fā)展,磁耦合共振型無線輸電技術所具有的優(yōu)勢越發(fā)突顯出來,其在電動汽車充電領域具有巨大的應用前景,因此磁耦合共振型無線輸電系統(tǒng)也成為了近兩年的學術界研究熱點。 無線輸電存在效率低,傳輸距離短等問題。傳統(tǒng)感應式無線電系統(tǒng)傳輸距離在毫米等級；電磁輻射式無線輸電系統(tǒng)由于是輻射式傳播,所以傳輸效率很低。論文根據(jù)無線輸電的傳輸特性建立磁耦合共振模型,基于耦合模理論與共振理論分析計算出無線輸電系統(tǒng)的最優(yōu)傳輸頻率,也就是使系統(tǒng)發(fā)生強耦合共振的工作頻率。分析總結(jié)了拓撲結(jié)構(gòu)、傳輸距離、線圈特性等對于系統(tǒng)傳輸效率的影響。并利用有限元分析法,在CST電磁仿真軟件上對所計算的共振頻率進行實驗驗證,分析不同負載情況下系統(tǒng)的傳輸特性,實驗結(jié)果表明所計算出的共振頻率可以使系統(tǒng)工作在較高效的強耦合傳輸狀態(tài)。實驗中發(fā)現(xiàn)當負載接入時,發(fā)射端會出現(xiàn)頻率跌落現(xiàn)象。為保證系統(tǒng)工作在最優(yōu)頻率,所以在設計樣機時在發(fā)射電源部分加入了頻率鎖定模塊。最后搭建磁耦合共振型無線輸電硬件系統(tǒng),在12cm處點亮4瓦的LED燈,實現(xiàn)了電力的無線傳輸。
[Abstract]:The technology in which electrical equipment obtains electricity in a non-contact manner is called wireless power transmission technology. It enables electrical equipment to get rid of complex types of chargers and power supply interfaces that reduce device sealing. At the same time, it can avoid the disadvantages of the traditional traverse transmission mode such as electric spark, so wireless transmission mode has great convenience and security. Traditional inductive wireless transmission technology, such as the wireless charging base of mobile phone, can be avoided. Electric toothbrush charging has many problems, such as short transmission distance, low transmission power and difficult heat dissipation. The magnetically coupled resonance wireless transmission system is a new type of wireless transmission technology proposed in 2007, which has long transmission distance. With the rapid development of electric vehicles, the advantages of magnetically coupled resonance wireless transmission technology have become more and more prominent. It has great application prospect in the field of electric vehicle charging, so magnetic coupling resonance wireless transmission system has become a hot research topic in academic circles in recent two years. The transmission distance of the traditional inductive radio system is in the millimeter level; the electromagnetic radiation type wireless transmission system is radiative transmission, So the transmission efficiency is very low. Based on the transmission characteristics of wireless transmission, the magnetically coupled resonance model is established, and the optimal transmission frequency of wireless transmission system is calculated based on coupling mode theory and resonance theory. The influence of topology, transmission distance and coil characteristics on the transmission efficiency of the system is analyzed and summarized. The calculated resonance frequency is experimentally verified by CST electromagnetic simulation software, and the transmission characteristics of the system under different loads are analyzed. The experimental results show that the calculated resonant frequency can make the system work in a more efficient state of strong coupling transmission. It is found in the experiment that the frequency drop will occur at the transmitter when the load is connected. In order to ensure the optimal frequency of the system, Therefore, the frequency locking module is added to the transmission power supply when the prototype is designed. Finally, the magnetically coupled resonant wireless transmission hardware system is built, and the 4-watt LED lamp is illuminated at 12cm to realize the wireless transmission of power.
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM724

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