本文選題：變頻電源 + APFC��； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：變頻電源要有較高的穩(wěn)態(tài)性能和較快的動態(tài)響應(yīng)能力,數(shù)字化控制技術(shù)可以有效滿足該要求。以實際需求為背景,本文設(shè)計了一臺以DSP為控制核心的,輸入為單相工頻交流電,輸出電壓和頻率可調(diào)的變頻電源。深入研究了變頻電源的相關(guān)理論,分析了變頻電源基本原理,正弦脈寬調(diào)制技術(shù),死區(qū)效應(yīng)及補償方法,數(shù)字化PID控制技術(shù)等,依據(jù)工程實際需求,確定了系統(tǒng)性能指標(biāo),給出了變頻電源系統(tǒng)結(jié)構(gòu)設(shè)計方案。主電路選用電壓型交直交結(jié)構(gòu),并通過電路參數(shù)的優(yōu)化設(shè)計實現(xiàn)了對開關(guān)管耐壓要求低,輸出電壓脈動小的基本要求;為提高輸入端功率因數(shù),減小電流諧波,整流電路采用有源功率因數(shù)校正技術(shù),達到穩(wěn)定輸出電壓,輸入端電流接近正弦波的作用;針對基于DSP控制的單相全橋逆變電路,采用數(shù)字化控制策略,將SPWM波形生成、AD采樣和PID調(diào)節(jié)的控制算法完全數(shù)字化,實現(xiàn)變頻電源的靈活控制,提高系統(tǒng)整體動態(tài)性能。使用Saber和MATLAB/Simulink軟件對APFC電路和逆變電路進行建模仿真,驗證了系統(tǒng)設(shè)計方案的正確性和有效性。電路仿真結(jié)果表明,輸入電流波形與輸入電壓波形跟隨好,功率因數(shù)到達0.97,滿足系統(tǒng)要求,整流輸出電壓穩(wěn)定在400V,逆變電路實現(xiàn)系統(tǒng)變頻變壓功能。
[Abstract]:The frequency conversion power supply must have high steady performance and fast dynamic response ability, digital control technology can meet this requirement effectively. Under the background of actual demand, this paper designs a variable frequency power supply with DSP as the control core, single phase power frequency alternating current and adjustable output voltage and frequency. This paper deeply studies the related theory of frequency conversion power supply, analyzes the basic principle of frequency conversion power supply, sinusoidal pulse width modulation technology, dead-time effect and compensation method, digital PID control technology and so on. According to the actual requirements of engineering, the system performance index is determined. The structure design scheme of frequency conversion power supply system is given. The main circuit adopts the voltage type AC / DC structure and realizes the basic requirements of low voltage resistance and low output voltage pulsation through the optimization design of circuit parameters, in order to improve the input power factor and reduce the current harmonics, The rectifier uses active power factor correction (APFC) technology to stabilize the output voltage, and the input current is close to sine wave, and the digital control strategy is adopted for the single-phase full-bridge inverter circuit based on DSP control. The control algorithm of SPWM waveform generation AD sampling and PID regulation is completely digitized to realize the flexible control of frequency conversion power supply and to improve the overall dynamic performance of the system. Saber and MATLAB/Simulink software are used to model and simulate the APFC circuit and the inverter circuit. The correctness and validity of the system design scheme are verified. The circuit simulation results show that the input current waveform and the input voltage waveform follow well, the power factor reaches 0.97, which meets the system requirements, and the rectifier output voltage is stable at 400V. The inverter circuit realizes the variable frequency voltage function of the system.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM46

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相關(guān)期刊論文 前1條

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本文編號：1863782