本文選題：高壓開關(guān)電源 + 高頻變壓器�。� 參考：《武漢理工大學(xué)》2014年碩士論文

【摘要】：高壓電源在工業(yè)、農(nóng)業(yè)、軍事等領(lǐng)域有著廣泛的用途，特別是在電力行業(yè)的絕緣測(cè)試方面起著重要作用。以往的高壓電源具有電能利用率低，體積大，操作維修不便等缺點(diǎn)。隨著開關(guān)電源技術(shù)的快速發(fā)展，高壓電源領(lǐng)域也正在逐步采用開關(guān)電源技術(shù)。開關(guān)電源技術(shù)在高壓電源領(lǐng)域的普遍應(yīng)用將有效提升高壓電源的性能。 論文介紹了國內(nèi)外開關(guān)電源的現(xiàn)狀及發(fā)展趨勢(shì)，對(duì)開關(guān)電源的控制方式及主電路拓?fù)涞冗M(jìn)行了深入的研究與分析，并在此基礎(chǔ)上提出來5kV高壓開關(guān)電源的總體技術(shù)方案，設(shè)計(jì)了一款基于微控制器和脈寬調(diào)制（PWM）技術(shù)的高壓開關(guān)電源。該高壓開關(guān)電源采用單端反激式主電路拓?fù)浣Y(jié)構(gòu)，由微控器控制脈寬調(diào)制芯片TL494產(chǎn)生高頻脈沖，，經(jīng)高頻變壓器輸出0～5kV連續(xù)可調(diào)電壓。整個(gè)高壓開關(guān)電源系統(tǒng)的硬件電路主要分為5個(gè)部分，其中包括調(diào)壓穩(wěn)壓電路、升壓電路、高頻變壓器、采樣反饋電路和系統(tǒng)保護(hù)電路。其中高頻變壓器是設(shè)計(jì)的重點(diǎn)，論文采用輸出功率表格法選擇高頻變壓器磁芯，結(jié)合經(jīng)驗(yàn)公式使之達(dá)到設(shè)計(jì)要求，對(duì)提高整個(gè)高壓開關(guān)電源的性能起到重要作用。 采用功能強(qiáng)大的微處理器構(gòu)成高壓開關(guān)電源中的控制系統(tǒng)，結(jié)合A/D轉(zhuǎn)換電路和D/A轉(zhuǎn)換電路，組成具有完善控制和保護(hù)功能的高壓開關(guān)電源系統(tǒng)。其中主要完成數(shù)據(jù)信息的采集和處理，利用轉(zhuǎn)換后的數(shù)字量信號(hào)完成對(duì)整個(gè)電源系統(tǒng)的控制以及實(shí)現(xiàn)鍵盤錄入、液晶顯示等，具有良好的人機(jī)對(duì)話功能。 仿真和調(diào)試結(jié)果表明論文所設(shè)計(jì)的高壓開關(guān)電源提高了電源的穩(wěn)定性和降低了功率損耗，滿足設(shè)計(jì)要求。該電源采用模擬電路與數(shù)字電路相互配合的方案，構(gòu)成閉環(huán)實(shí)時(shí)監(jiān)控系統(tǒng)，具有可靠性高、調(diào)壓范圍寬、控制性能好等優(yōu)點(diǎn)。
[Abstract]:High voltage power supply is widely used in industrial, agricultural, military and other fields, especially in the insulation testing of electric power industry. The past high voltage power supply has the disadvantages of low power utilization, large volume, inconvenient operation and maintenance. With the rapid development of switching power technology, the field of high voltage power supply is also gradually using switch Power supply technology. The application of switching power supply technology in the field of high-voltage power supply will effectively enhance the performance of high voltage power supply.
This paper introduces the current situation and development trend of switching power supply at home and abroad, studies and analyses the control mode and main circuit topology of the switching power supply. On this basis, the general technical scheme of the 5kV high voltage switching power supply is proposed, and a high voltage switching power supply based on the micro controller and the pulse width modulation (PWM) technology is designed. The high voltage switching power supply adopts the single end flyback main circuit topology, which generates high frequency pulse by the micro controller TL494 pulse width modulation chip, and output 0 to 5kV continuous adjustable voltage through high frequency transformer. The hardware circuit of the whole high voltage switching power supply system is divided into 5 parts, including voltage regulation circuit, boost circuit and high frequency voltage variable voltage circuit. The high frequency transformer is the key point of the design. The paper selects the high frequency transformer core by the output power form method, and makes it meet the design requirements with the empirical formula. It plays an important role in improving the performance of the high voltage switching power supply.
Using a powerful microprocessor to form a control system in a high voltage switching power supply, combined with the A/D conversion circuit and the D/A conversion circuit, a high voltage switching power supply system with perfect control and protection functions is composed, which mainly completes the collection and processing of data information, and completes the control of the whole power supply system by using the converted digital signal. System and keyboard input, LCD display, etc., has a good man-machine conversation function.
The simulation and debugging results show that the high voltage switching power supply designed in this paper improves the stability of the power supply and reduces the power loss, and meets the design requirements. The power supply adopts the scheme of analog and digital circuits to form a closed loop real-time monitoring system, which has the advantages of high reliability, wide range of voltage regulation and good control performance.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN86

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