本文選題：功率因數(shù)校正 + 單周期　； 參考：《西安電子科技大學》2014年碩士論文

【摘要】：開關(guān)電源是電網(wǎng)與用電設(shè)備之間的橋梁,而功率因數(shù)校正電路作為所有開關(guān)電源的第一級,擔負著抑制諧波電流注入電網(wǎng)的重要作用,其性能的優(yōu)劣直接影響電網(wǎng)的安全和電能的質(zhì)量�，F(xiàn)代開關(guān)電源技術(shù)正在朝著高頻化、模塊化和智能化的方向發(fā)展,而傳統(tǒng)的模擬控制方案由于自身的局限性,已不再能夠滿足當前的市場需求。因此本文在研究了開關(guān)電源原理和結(jié)構(gòu)的基礎(chǔ)上,設(shè)計了一款輸入為電網(wǎng)220V交流電壓,輸出為直流400V的,由單周期原理控制的有源功率因數(shù)校正Boost-APFC電路,并且對單周期控制系統(tǒng)給出了數(shù)字化的解決方案。本文對開關(guān)電源和功率因數(shù)校正的原理進行了闡述,通過對拓撲結(jié)構(gòu)、控制策略和采樣算法三個方面的分析,給出了適用于功率因數(shù)校正電路的參數(shù)方案。利用PSpice、Simulink和SIMPLIS完成了Boost變換器的數(shù)學模型建模,仿真結(jié)果表明,建模得到的傳遞函數(shù)和實際開關(guān)電路具有較高契合度。針對Boost變換器,設(shè)計了雙環(huán)控制的電流環(huán)控制系統(tǒng),利用Sisotool對控制回路進行了頻率補償,對系統(tǒng)的穩(wěn)定性和響應速度進行了優(yōu)化。在Boost變換器設(shè)計的基礎(chǔ)上增加了功率因數(shù)校正功能,使用單周期控制策略在PSim中完成了仿真和優(yōu)化,通過調(diào)試,最終使得功率因數(shù)值PF達到了99.7%以上,總諧波畸變率THD下降到了5%以下。針對單周期控制策略的特點,設(shè)計了適合于DSP/ARM控制的數(shù)字化PI模塊和數(shù)字化采樣模塊,摒棄了傳統(tǒng)的前后臺嵌入式系統(tǒng),基于uC/OSII實時操作系統(tǒng)設(shè)計了多任務調(diào)度策略,并成功的在以ARM920T為核心的mini2440開發(fā)板上進行了驗證性實驗。
[Abstract]:Switching power supply is a bridge between power grid and power equipment. As the first stage of all switching power supply, power factor correction circuit plays an important role in restraining harmonic current injection into power grid. Its performance directly affects the security of power grid and the quality of power. The modern switching power supply technology is developing towards the direction of high frequency modularization and intelligence while the traditional analog control scheme is no longer able to meet the current market demand due to its own limitations. On the basis of studying the principle and structure of switching power supply, this paper designs an active power factor correction Boost-APFC circuit with 220 V AC voltage and 400V DC output, which is controlled by single cycle principle. The digital solution of single cycle control system is also given. In this paper, the principle of switching power supply and power factor correction is described. Through the analysis of topology, control strategy and sampling algorithm, a parameter scheme suitable for power factor correction circuit is given. The mathematical model modeling of boost converter is completed by using PSpice Simulink and SIMPLIS. The simulation results show that the proposed transfer function has a high consistency with the actual switching circuit. A two-loop current loop control system is designed for boost converter. Sisotool is used to compensate the frequency of the control loop. The stability and response speed of the system are optimized. Based on the design of boost converter, the power factor correction function is added, and the simulation and optimization of PSim with single cycle control strategy are completed. Through debugging, the power factor value PF reaches more than 99.7%. The total harmonic distortion rate (THD) decreased to less than 5%. According to the characteristics of single cycle control strategy, a digital Pi module and a digital sampling module are designed for DSP / arm control. The traditional embedded system is abandoned, and a multi-task scheduling strategy based on UC / OSII real-time operating system is designed. The verification experiments are successfully carried out on the mini2440 development board with ARM920T as the core.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM46

【共引文獻】

中國期刊全文數(shù)據(jù)庫 前1條

1 王明霞;都洪基;;基于IR1150S芯片的Boost PFC變換器分析與設(shè)計[J];電源世界;2014年11期

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本文編號：2055656