本文選題：變頻器 + 開關(guān)電源　； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：現(xiàn)代電力電子技術(shù)作為一門不斷成熟的學(xué)科發(fā)展到現(xiàn)在,變頻器通過改變電機工作頻率方式來控制電機的電力設(shè)備。變頻器主要由整流(交流變直流)、濾波、逆變(直流變交流)、制動單元、驅(qū)動單元、檢測單元微處理單元等組成。開關(guān)電源作為電力電子器件重要的分支,也為現(xiàn)代科學(xué)和社會生活提供能源需求,通過PWM的控制和開關(guān)管的開通和關(guān)斷來穩(wěn)定輸出電壓。開關(guān)電源為變頻器的控制電路和驅(qū)動電路供電。開關(guān)電源的性能直接影響著變頻器的工作質(zhì)量。本課題基于變頻器的工作原理和各部分的結(jié)構(gòu)設(shè)計,為變頻器的供電設(shè)計了一種多路輸出的反激式開關(guān)電源,其中輸入電壓為200VDC～750VDC,四路輸出分別是24V、1A,+15V、2A,-15V、1A,+5V、3A。論文講述了變頻器的背景意義和其性能要求,開關(guān)電源的拓撲結(jié)構(gòu)和工作原理,通過分析選擇合理的拓撲結(jié)構(gòu),并通過開關(guān)電源的硬件設(shè)計,包括各個部分的電路設(shè)計、器件選型、變壓器設(shè)計,原理圖的設(shè)計、PCB板的制作,進而是實物的形成;本課題應(yīng)用的控制芯片UC3845給開關(guān)電源提供很好的驅(qū)動能力,采用電流型雙閉環(huán)控制控制系統(tǒng),并采用反饋回路方法來穩(wěn)定輸出電壓,最終給變頻器提供優(yōu)質(zhì)的電能。經(jīng)過多次實驗和反復(fù)補充修改設(shè)計,最終制成了具有較高性能指標的變頻器輔助開關(guān)電源樣機。實驗測試結(jié)果表明:所設(shè)計的開關(guān)電源具有優(yōu)良的穩(wěn)壓性能,以及輸出電壓紋波小、負載調(diào)整率和電壓調(diào)整率比較精確,并且能夠為變頻器提供良好的電能。然后是開關(guān)電源的實驗與調(diào)試,輸出波形的分析,通過開關(guān)電源的效率、紋波大小等數(shù)據(jù)來驗證電源的性能以及工作的可行性。
[Abstract]:Modern power electronics technology has been developed as a mature subject. Frequency converters control motor power equipment by changing the working frequency of the motor. Frequency converter is mainly composed of rectifier (AC to DC), filter, inverter (DC AC), braking unit, drive unit, micro processing unit of detection unit and so on. Switching power supply, as an important branch of power electronic devices, also provides energy demand for modern science and social life. The output voltage is stabilized by PWM control and switch on and off. The switching power supply supplies power to the control circuit and drive circuit of the converter. The performance of switching power supply directly affects the working quality of inverter. Based on the working principle of inverter and the structure design of each part, a kind of flyback switching power supply with multiple output is designed for the power supply of the inverter. The input voltage is 200VDC / 750VDCA, and the four-way output is 24V / 1A, 15V / 2A / 15V / 1A and 5V / 3A respectively. The paper describes the background significance and performance requirements of the converter, the topology structure and working principle of the switching power supply, through the analysis and selection of reasonable topology structure, and through the hardware design of the switching power supply, including the circuit design of each part. Device selection, transformer design, schematic design, PCB board production, and then the formation of physical objects. The control chip UC3845, which is applied in this subject, provides a good driving capability for the switching power supply, and adopts a current-mode double closed-loop control system. The feedback loop method is used to stabilize the output voltage and provide high quality electric energy to the inverter. After many experiments and repeated modification, the inverter auxiliary switching power supply prototype with high performance index is made. The experimental results show that the designed switching power supply has good voltage stabilizing performance, small output voltage ripple, accurate load adjustment rate and voltage adjustment rate, and can provide good power for inverter. Then the experiment and debugging of the switching power supply, the analysis of the output waveform, the efficiency of the switching power supply, the ripple size and other data to verify the performance of the power supply and the feasibility of the work.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN86

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