本文選題：感應(yīng)加熱 + 并聯(lián)諧振�。� 參考：《鄭州大學(xué)》2014年碩士論文

【摘要】：本課題的研究對(duì)象是高頻感應(yīng)加熱電源。在對(duì)感應(yīng)加熱電源的發(fā)展過(guò)程以及國(guó)內(nèi)外感應(yīng)加熱電源的發(fā)展現(xiàn)狀了解的基礎(chǔ)上，分別對(duì)應(yīng)用于感應(yīng)加熱電源的兩種諧振方式進(jìn)行了分析，并根據(jù)課題需要，選定了并聯(lián)諧振作為本課題中高頻感應(yīng)加熱電源的逆變拓?fù)浣Y(jié)構(gòu)。然后對(duì)高頻感應(yīng)加熱電源電流工作模式，和電流饋電拓?fù)渥隽撕?jiǎn)要介紹，根據(jù)電流模式的不足對(duì)電路做了斜率補(bǔ)償分析，并根據(jù)實(shí)際電路需要對(duì)控制電路反饋電流做了斜率補(bǔ)償。然后確定了控制芯片為電流型控制芯片。 本文對(duì)并聯(lián)諧振逆變電路的工作狀態(tài)進(jìn)行了分析，容性、阻性和感性情況下分析。對(duì)主電路中的主要器件進(jìn)行了計(jì)算和選取，并且對(duì)輔助電源、變壓器、電流互感器和濾波電感等元器件具體制作做了計(jì)算和制作過(guò)程做了詳細(xì)的介紹。整個(gè)設(shè)計(jì)的恒流源輸出功率為3kW，同時(shí)根據(jù)本文設(shè)計(jì)要求選擇了UC3846芯片，并根據(jù)UC3846的同步端，實(shí)現(xiàn)了同步控制及頻率跟蹤，對(duì)精密全波整流電路、保護(hù)電路和驅(qū)動(dòng)電路進(jìn)行了計(jì)算設(shè)計(jì)。設(shè)計(jì)了開(kāi)機(jī)掃頻電路，并配合頻率跟蹤電路實(shí)現(xiàn)了電源的軟啟動(dòng)。在樣機(jī)實(shí)驗(yàn)時(shí)遇到了一些實(shí)際問(wèn)題，對(duì)其分析并提出了解決的辦法，最后使電源實(shí)現(xiàn)了比較理想的工作狀態(tài)。 本文結(jié)尾給出了主電路及驅(qū)動(dòng)電路的原理圖和PCB打樣圖。在實(shí)驗(yàn)中，測(cè)得了部分實(shí)際波形。從結(jié)果看出每部分都能達(dá)到預(yù)期結(jié)果。最后完成整機(jī)調(diào)試，通過(guò)實(shí)驗(yàn)波形驗(yàn)證，本設(shè)計(jì)達(dá)到了預(yù)期的要求。
[Abstract]:The research object of this subject is high frequency induction heating power supply. Based on the understanding of the development process of induction heating power supply and the development status of induction heating power supply at home and abroad, two kinds of resonance modes applied to induction heating power supply are analyzed, and according to the need of the subject, The parallel resonance is selected as the inverter topology of the high frequency induction heating power supply. Then, the current working mode and current feed topology of high frequency induction heating power supply are briefly introduced, and the slope compensation analysis of the circuit is made according to the deficiency of current mode. The feedback current of the control circuit is compensated by slope according to the actual circuit requirement. Then the control chip is determined to be a current-mode control chip. In this paper, the working state of parallel resonant inverter circuit is analyzed, including capacitive, resistive and inductive conditions. The main components in the main circuit are calculated and selected, and the fabrication process of auxiliary power supply, transformer, current transformer and filter inductor is introduced in detail. The output power of the whole constant current source is 3kW, and the UC3846 chip is selected according to the design requirements of this paper. According to the synchronous terminal of UC3846, the synchronous control and frequency tracking are realized, and the precision full wave rectifier circuit is realized. Protection circuit and drive circuit are calculated and designed. The frequency sweep circuit is designed, and the soft start of the power supply is realized with the frequency tracking circuit. Some practical problems are encountered in the prototype experiment, and the solutions are put forward and analyzed. Finally, the ideal working state of the power supply is realized. At the end of this paper, the schematic diagram and PCB proofing diagram of main circuit and drive circuit are given. In the experiment, some actual waveforms are measured. From the results, we can see that each part can achieve the expected results. Finally, the debugging of the whole machine is completed, and the experimental waveform verifies that the design meets the expected requirements.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM464

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