發(fā)布時(shí)間：2018-03-10 21:08

  本文選題：磁耦合諧振式　切入點(diǎn)：無(wú)線電能傳輸　出處：《沈陽(yáng)農(nóng)業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著科技的不斷發(fā)展和人類生存空間的不斷壓縮,傳統(tǒng)的電能傳輸方式的缺點(diǎn)也逐漸暴露出來(lái),有線電能傳輸已不能滿足當(dāng)今人們生活的需求。無(wú)線電能傳輸技術(shù)省去了電器設(shè)備與電源之間相互連接,較傳統(tǒng)輸電方式更為安全靈活,抗干擾能力更強(qiáng),節(jié)省了空間,使電氣設(shè)備擺脫了電源線的束縛,將人們的生活變得更加舒適便利。首先,本文通過耦合模型理論和電路模型理論兩方面對(duì)磁耦合諧振式無(wú)線電能傳輸系統(tǒng)進(jìn)行理論分析,并得出系統(tǒng)傳輸效率的一般表達(dá)式。從能量傳輸原理出發(fā),闡明了當(dāng)電源頻率等于線圈諧振頻率時(shí),系統(tǒng)的傳輸效率取最大值。通過表達(dá)式可以看出,系統(tǒng)達(dá)到最大傳輸效率的前提條件是兩諧振線圈之間產(chǎn)生電磁共振,這就要求電源頻率需保持在線圈諧振頻率附近。通過兩種理論模型的對(duì)比分析,對(duì)無(wú)線電能傳輸?shù)墓ぷ髟碛辛烁由钊氲睦斫?為接下來(lái)的研究分析打下了良好的基礎(chǔ)。其次,對(duì)兩種常用的諧振線圈(螺線管式諧振線圈和平面螺旋式諧振線圈)進(jìn)行了研究,分析了其電感、電容及電阻參數(shù)的計(jì)算方法,對(duì)諧振線圈的參數(shù)設(shè)計(jì)提供了很大幫助。分析了導(dǎo)線趨膚效應(yīng)與損耗、品質(zhì)因數(shù)、耦合系數(shù)等因素對(duì)系統(tǒng)傳輸特性的影響,得出采用大線徑和多股繞制的導(dǎo)線可以有效減小趨膚效應(yīng);提高傳輸效率的關(guān)鍵在于增大兩線圈間的耦合系數(shù);增大線圈電感可以提高品質(zhì)因數(shù),從而減小損耗提高效率。再次,利用HFSS仿真軟件對(duì)兩種諧振線圈進(jìn)行仿真分析,得出在電源頻率接近諧振頻率時(shí),系統(tǒng)具有較高的傳輸效率;增加諧振線圈間距,傳輸效率下降很快;改變諧振線圈的水平相對(duì)位置,在小范圍內(nèi)傳輸效率變化不大,當(dāng)水平偏差超過1/2線圈半徑時(shí),傳輸效率大幅下降;線圈軸向夾角在30°以內(nèi)時(shí),傳輸效率變化不大,超過時(shí)傳輸效率很快下降到0;對(duì)中繼線圈產(chǎn)生的影響進(jìn)行仿真分析,得出中繼線圈可以大幅度提高系統(tǒng)的傳輸效率;對(duì)兩個(gè)發(fā)射線圈對(duì)一個(gè)接收線圈進(jìn)行無(wú)線電能傳輸情況進(jìn)行了仿真分析,仿真結(jié)果顯示出,反相位的兩發(fā)射線圈會(huì)產(chǎn)生相互抵消的效果,在接收線圈上沒有能量的傳輸,同理同相位的兩個(gè)發(fā)射線圈會(huì)產(chǎn)生疊加的效果。最后,根據(jù)磁耦合諧振的原理設(shè)計(jì)了一個(gè)簡(jiǎn)易的系統(tǒng)實(shí)驗(yàn)?zāi)Ｐ?對(duì)其發(fā)射裝置和接收裝置進(jìn)行了詳細(xì)的介紹,模型的核心部件采用NE555集成電路作為產(chǎn)生諧振所需要的高頻電源,實(shí)驗(yàn)裝置基本上實(shí)現(xiàn)了無(wú)線電能傳輸,在100mm的傳輸距離上可以達(dá)到約40%的傳輸效率。改變線圈間距、線圈水平偏移距離和線圈軸向夾角,并對(duì)系統(tǒng)在以上不同工作狀態(tài)下的電氣參數(shù)進(jìn)行測(cè)量,通過對(duì)測(cè)量結(jié)果的整理分析,證實(shí)了 HFSS仿真分析的正確性,同時(shí)也提出本實(shí)驗(yàn)裝置存在的幾點(diǎn)不足以及還需要進(jìn)行更多研究的問題。
[Abstract]:With the continuous development of science and technology and the continuous compression of human living space, the shortcomings of the traditional power transmission mode are gradually exposed. Cable power transmission can no longer meet the needs of people nowadays. Radio energy transmission technology eliminates the interconnection between electrical equipment and power supply, and is more secure and flexible than the traditional transmission mode, and has stronger anti-interference ability and saves space. It makes the electric equipment get rid of the shackles of the power line and make people's life more comfortable and convenient. Firstly, this paper analyzes the magnetically coupled resonant radio energy transmission system through the coupling model theory and the circuit model theory. Based on the principle of energy transmission, the maximum transmission efficiency of the system is illustrated when the frequency of the power supply is equal to the resonant frequency of the coil. In order to achieve the maximum transmission efficiency, the electromagnetic resonance (Mr) between the two resonant coils is the prerequisite, which requires the frequency of the power supply to be kept near the resonant frequency of the coils. We have a deeper understanding of the working principle of radio transmission, which lays a good foundation for the following research and analysis. Secondly, In this paper, two kinds of common resonant coils (solenoid resonant coils and planar spiral resonant coils) are studied, and the calculation methods of inductance, capacitance and resistance parameters are analyzed. It provides a great help to the parameter design of the resonant coil. The effects of traverse skin effect and loss, quality factor and coupling coefficient on the transmission characteristics of the system are analyzed. It is concluded that the skin effect can be effectively reduced by using large wire diameter and multi-strand winding wire, the key to improve transmission efficiency is to increase the coupling coefficient between the two coils, and the quality factor can be improved by increasing the coil inductance. In order to reduce the loss and improve the efficiency. Thirdly, using HFSS simulation software to simulate the two kinds of resonant coils, it is concluded that when the power frequency is close to the resonant frequency, the system has a higher transmission efficiency, and increases the spacing of the resonant coils. The transmission efficiency decreases rapidly, and the transmission efficiency changes little in a small range by changing the horizontal relative position of the resonant coil. When the horizontal deviation exceeds the radius of the 1/2 coil, the transmission efficiency decreases significantly, and the axial angle of the coil is less than 30 擄. The transmission efficiency is not changed much and the transmission efficiency drops to 0 when it exceeds it. The simulation analysis of the influence of the trunk coil shows that the transmission efficiency of the system can be greatly improved by the trunk coil. The radio energy transmission between two transmitting coils and one receiving coil is simulated and analyzed. The simulation results show that the two transmitting coils with inverse phase can counteract each other, and there is no transmission of energy on the receiving coils. Two transmitting coils with the same phase can produce superposition effect. Finally, according to the principle of magnetic coupling resonance, a simple system experimental model is designed, and the emitter and receiver are introduced in detail. The core component of the model is NE555 integrated circuit as the high frequency power supply needed to generate resonance. The experimental device basically realizes radio energy transmission, and can achieve transmission efficiency of about 40% at 100mm transmission distance. The horizontal offset distance of the coil and the axial angle of the coil are measured, and the electrical parameters of the system under the above different working conditions are measured. The correctness of the HFSS simulation analysis is verified by the analysis of the measuring results. At the same time, the shortcomings of the experimental device and the need for more research are also put forward.
【學(xué)位授予單位】：沈陽(yáng)農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM724
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本文編號(hào)：1595073