本文關(guān)鍵詞：基于STM32的微波應(yīng)用器電源模塊的研究與設(shè)計(jì)　出處：《昆明理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 微波應(yīng)用器 LCC諧振 移相全橋 分布電容 Fuzzy PID控制

【摘要】：微波應(yīng)用器作為一種高效、快捷的加熱裝置,其體積、效率及智能化水平越來越受到人們的關(guān)注。傳統(tǒng)微波應(yīng)用器電源一般采用先工頻變壓器升壓再倍壓整流輸出的工作方式,因而電源有質(zhì)量重、體積大、故障多、穩(wěn)定性差、功率調(diào)節(jié)難等不足。應(yīng)用開關(guān)電源技術(shù),可以改善此不足。然而,開關(guān)電源存在開關(guān)損耗,并且損耗隨著開關(guān)頻率和輸出功率的上升而增大。因此,有了利用變壓器的漏感作為LLC諧振的諧振參數(shù)實(shí)現(xiàn)軟開關(guān)來減小開關(guān)損耗研究,而且,還有效避免了變壓器漏感對(duì)電源帶來的影響。但是,隨著工作頻率的升高,高頻變壓器寄生電容對(duì)電源性能的影響越來越大。本論文在分析微波應(yīng)用器磁控管工作特性和軟開關(guān)原理的基礎(chǔ)上,設(shè)計(jì)了一種移相全橋LCC諧振式微波應(yīng)用器電源方案并進(jìn)行仿真分析和實(shí)驗(yàn)研究,主要工作如下:(1)采用LCC諧振變換器與移相全橋逆變電路相結(jié)合,利用變壓器的漏感和分布電容作為諧振參數(shù)實(shí)現(xiàn)軟開關(guān),進(jìn)行微波應(yīng)用器電源模塊的設(shè)計(jì)方案;(2)運(yùn)用Fuzzy PID控制對(duì)微波電源輸出電壓的移相控制仿真分析,結(jié)果表明,能滿足對(duì)復(fù)雜、難以建立有效模型的開關(guān)電源系統(tǒng)的控制性能;(3)采用基波近似法推導(dǎo)出了微波開關(guān)電源的數(shù)學(xué)模型,在仿真平臺(tái)搭建了 LCC諧振主電路、PWM信號(hào)產(chǎn)生電路等模型并進(jìn)行仿真驗(yàn)證Fuzzy PID控制效果。本論文所設(shè)計(jì)的全橋移相LCC諧振式微波應(yīng)用器電源可以實(shí)現(xiàn)軟開關(guān),仿真和實(shí)驗(yàn)結(jié)果表明采用Fuzzy PID控制對(duì)微波電源輸出電壓的移相控制是有效可行的。
[Abstract]:Microwave application device is an efficient and fast heating device, its volume. More and more attention has been paid to the efficiency and intelligence level. The traditional microwave application power supply generally uses the mode of power frequency transformer boost and voltage doubling rectifier output, so the power supply is heavy, large volume and many faults. The switching power supply technology can be used to improve this deficiency. However, the switching power supply has switching loss, and the loss increases with the increase of switching frequency and output power. With the use of transformer leakage inductance as the resonant parameters of LLC resonance to achieve soft switching to reduce the switching loss, but also effectively avoid the transformer leakage inductance on the power supply. With the increase of operating frequency, the parasitic capacitance of high frequency transformer has more and more influence on the power supply performance. This paper analyzes the characteristics of magnetron and the principle of soft switch of microwave application device. A power supply scheme of phase-shifted full-bridge LCC resonant microwave application is designed, and the simulation analysis and experimental research are carried out. The main work is as follows: 1) using LCC resonant converter and phase-shifted full-bridge inverter. Using leakage inductance and distributed capacitance of transformer as resonant parameters, the soft switch is realized, and the design of power module of microwave application device is carried out. 2) the simulation analysis of phase shift control of microwave power output voltage using Fuzzy PID control shows that the control performance of switching power supply system, which is complex and difficult to establish an effective model, can be satisfied. (3) the mathematical model of microwave switching power supply is deduced by using the fundamental approximation method, and the LCC resonant main circuit is built on the simulation platform. PWM signal generation circuit and other models are simulated to verify the control effect of Fuzzy PID. The full bridge phase-shifted LCC resonant microwave application power supply designed in this paper can realize soft switching. The simulation and experimental results show that the Fuzzy PID control is effective and feasible for the phase shift control of the output voltage of microwave power supply.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM46

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