本文關(guān)鍵詞：移相全橋大功率高頻開(kāi)關(guān)電源的研究與設(shè)計(jì)　出處：《湖北工業(yè)大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 激光器 移相全橋 零電壓開(kāi)關(guān)

【摘要】：目前大功率激光器前端儲(chǔ)能電容的充電電源主要采用三相不控整流方式，由于整流電路不能升壓，因此，為了滿(mǎn)足激光器的功率要求，一般采用工頻變壓器升壓，導(dǎo)致電源的效率低、體積大。為了提高電源的效率，減小整機(jī)體積，結(jié)合企業(yè)合作項(xiàng)目要求，研究并實(shí)現(xiàn)了用于激光器前端儲(chǔ)能電容充電的ZVS移相全橋開(kāi)關(guān)電源，其額定功率10kW、開(kāi)關(guān)頻率30kHz、輸出直流電壓0V~800V。本文主要研究?jī)?nèi)容如下： 1.根據(jù)本課題研究制作的開(kāi)關(guān)電源的功率要求，主電路選擇適用于中大功率電能變換的DC/DC全橋變換器，分析移相控制ZVS-PWM DC/DC全橋變換器的組成結(jié)構(gòu)及其工作原理。 2.根據(jù)移相全橋開(kāi)關(guān)電源系統(tǒng)的工作原理及控制對(duì)象，建立了移相全橋開(kāi)關(guān)電源系統(tǒng)數(shù)學(xué)模型，設(shè)計(jì)了電感電流內(nèi)環(huán)電壓外環(huán)的雙環(huán)控制器，結(jié)合伯德圖分析了控制器的動(dòng)態(tài)與穩(wěn)態(tài)性能，搭建了基于Simulink的系統(tǒng)模型，并進(jìn)行了仿真。 3.根據(jù)本課題研究制作的開(kāi)關(guān)電源的性能指標(biāo)要求，完成了主電路的器件選擇與參數(shù)設(shè)計(jì)，主要包括：三相整流橋、濾波電容、功率開(kāi)關(guān)管、隔直電容、諧振電感、隔直電容、高頻變壓器和輸出整流橋等。根據(jù)移相全橋開(kāi)關(guān)電源系統(tǒng)的工作原理與控制器的設(shè)計(jì)，完成了PWM移相控制電路、電流內(nèi)環(huán)電壓外環(huán)的雙閉環(huán)控制電路、IGBT驅(qū)動(dòng)電路、變壓器原邊峰值電流檢測(cè)與控制電路以及預(yù)充電電路等。 4.根據(jù)理論分析與電路設(shè)計(jì)，搭建了開(kāi)關(guān)電源系統(tǒng)實(shí)驗(yàn)平臺(tái)，，在此實(shí)驗(yàn)平臺(tái)上進(jìn)行了滯后橋臂實(shí)現(xiàn)ZVS、占空比丟失、變壓器磁通不平衡、開(kāi)關(guān)管電壓尖峰和輸出整流二極管電壓尖峰與寄生振蕩等實(shí)驗(yàn)研究，并對(duì)實(shí)驗(yàn)研究結(jié)果進(jìn)行了比較與分析。實(shí)驗(yàn)結(jié)果表明：實(shí)現(xiàn)了在不同輸入電壓、不同負(fù)載范圍和不同占空比情況下的零電壓開(kāi)關(guān)，降低了開(kāi)關(guān)損耗，提高了開(kāi)關(guān)電源效率；通過(guò)合理的選擇諧振電感的電感量，促進(jìn)了開(kāi)關(guān)電源滯后橋臂的ZVS實(shí)現(xiàn)，同時(shí)抑制了占空比丟失；在變壓器原邊串聯(lián)隔直電容，有效的防止了磁通不平衡。 5.在開(kāi)關(guān)電源系統(tǒng)實(shí)驗(yàn)平臺(tái)的基礎(chǔ)上，結(jié)合理論分析與實(shí)驗(yàn)研究，完成了移相全橋開(kāi)關(guān)電源樣機(jī)的制作，現(xiàn)場(chǎng)測(cè)試表明其性能滿(mǎn)足技術(shù)指標(biāo)要求。
[Abstract]:The charging power supply for high power laser front end storage capacitor mainly adopts three-phase uncontrolled rectifier, the rectifier circuit can boost, therefore, in order to meet the requirements of the laser power, the general transformer, the power supply leads to low efficiency, large volume. In order to improve the efficiency of power supply, decrease the volume, combined with the enterprise cooperation projects study on the requirements for laser front end storage ZVS phase-shifting capacitor charging full bridge switching power supply is realized, the rated power of 10kW, the switching frequency is 30kHz, output voltage of 0V~800V. in this paper, the main research contents are as follows:
1., according to the power requirements of the switching power supply produced by our research, the main circuit selects the DC/DC full bridge converter suitable for the medium and high-power power conversion. The structure and working principle of the phase shifted ZVS-PWM DC/DC full bridge converter are analyzed.
The working principle and control object according to the 2. phase shifted full bridge switching power supply system, a phase shifted full bridge switching power supply system mathematical model, double loop controller design the inductor current loop, combining the Bode diagram analysis of the dynamic and steady-state performance of the controller, set up system model based on Simulink, and simulated.
3. according to the performance requirements of the switching power supply research and production of the project, completed the device selection and parameter design, the main circuit including: three-phase rectifier, filter capacitor, power switch, capacitor, resonant inductor, capacitor, high frequency transformer and output rectifier bridge. According to the design principle and controller the phase shifted full bridge switching power supply system, completed the PWM phase shift control circuit, double closed-loop control circuit of current loop, IGBT drive circuit, the transformer primary side peak current detection and control circuit and the pre charge circuit.
4. according to the theoretical analysis and circuit design, build the experimental platform of switch power supply system, the experimental platform for the lagging arm ZVS, duty cycle loss, transformer flux imbalance, experimental study of peak voltage and rectifier diode voltage spikes and parasitic oscillation switch tube, and the experimental results are compared with the analysis of experimental results. The results show that realized in different input voltage, duty ratio of zero voltage switch under the condition of different load and different range, reduce the switching losses, improve the efficiency of the switching power supply; the inductance of the resonant inductor selection reasonable, promote the switching power supply lagging arm of the implementation of ZVS, and suppress for the duty loss; in the transformer primary side series capacitor, effectively prevent the flux imbalance.
5., based on the experimental platform of switching power supply system, combined with theoretical analysis and experimental research, the prototype of the phase shifted full bridge switching power supply is completed. Field tests indicate that its performance meets the technical requirements.

【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM46

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