【摘要】：隨著節(jié)能減排政策的實(shí)施，各行各業(yè)對(duì)低損耗、小體積、高可靠性的大功率高頻開關(guān)電源的需求越來越大。大功率高頻開關(guān)電源作為工業(yè)的必備元件，其損耗、體積、溫升對(duì)開關(guān)電源整體性能有著至關(guān)重要的影響。研究高頻趨勢(shì)下開關(guān)電源的損耗對(duì)降低能源消耗具有較大的經(jīng)濟(jì)效益和社會(huì)意義。 本課題以企業(yè)委托合作項(xiàng)目“大功率無極調(diào)節(jié)高效UV電源的研制”為依托，以生產(chǎn)實(shí)際中的高頻高效開關(guān)電源為研究對(duì)象，以降低損耗、減小體積為研究目標(biāo)，以電路和結(jié)構(gòu)設(shè)計(jì)以及高頻變壓器優(yōu)化設(shè)計(jì)為重點(diǎn)展開研究。研制出的電源樣機(jī)實(shí)驗(yàn)測(cè)得其總體效率為92.2%，高頻變壓器的效率比優(yōu)化前提高了0.309%。電源內(nèi)部溫度場(chǎng)測(cè)試滿足設(shè)計(jì)要求，驗(yàn)證了結(jié)構(gòu)熱設(shè)計(jì)的合理性。 (1)對(duì)高頻開關(guān)電源的主電路、DC-DC逆變電路、逆變控制電路、驅(qū)動(dòng)電路、保護(hù)電路以及電源整體結(jié)構(gòu)進(jìn)行了設(shè)計(jì)。 (2)對(duì)比分析了幾種磁芯材料在不同頻率和磁通密度下的損耗特性，優(yōu)化選擇了磁芯材料。分析了高頻時(shí)環(huán)形磁芯幾何尺寸與磁芯損耗的關(guān)系，并推出了其歸一化公式，為后續(xù)環(huán)形磁芯尺寸優(yōu)化設(shè)計(jì)提供依據(jù)。從Dowell模型出發(fā)對(duì)繞組等效因子展開分析，為繞組導(dǎo)線選擇和繞組布局提供參考依據(jù)。 (3)基于AP法對(duì)6kW高頻變壓器進(jìn)行設(shè)計(jì),在NSGA-Ⅱ算法中改進(jìn)了排序策略和選擇截?cái)嗖呗�，，建立高頻變壓器的損耗和體積優(yōu)化數(shù)學(xué)模型，并用改進(jìn)算法對(duì)高頻變壓器進(jìn)行優(yōu)化設(shè)計(jì)。 (4)運(yùn)用AsoftMaxwell對(duì)繞組等效因子、繞組布局進(jìn)行二維仿真，對(duì)環(huán)形磁芯幾何尺寸與損耗關(guān)系進(jìn)行三維瞬態(tài)仿真，以驗(yàn)證優(yōu)化設(shè)計(jì)理論的正確性。對(duì)優(yōu)化后變壓器模型進(jìn)行三維瞬態(tài)仿真。 (5)對(duì)電源樣機(jī)進(jìn)行內(nèi)部溫度場(chǎng)測(cè)試和電源整體動(dòng)態(tài)損耗，驗(yàn)證電源結(jié)構(gòu)熱設(shè)計(jì)和高頻變壓器優(yōu)化設(shè)計(jì)的合理性。
[Abstract]:With the implementation of energy saving and emission reduction policy, the demand for high-power and high-frequency switching power supply with low loss, small size and high reliability is increasing in various industries. High-power and high-frequency switching power supply is a necessary component in industry, its loss, volume and temperature rise have a vital impact on the overall performance of switching power supply. It is of great economic benefit and social significance to study the loss of switching power supply under the high frequency trend to reduce the energy consumption. Based on the enterprise-commissioned project "Development of High Power Induction regulator High efficiency UV Power supply", this paper takes the high frequency and high efficiency switching power supply in production as the research object, aiming at reducing loss and volume as the research goal. The research focuses on the circuit and structure design and the optimization design of high-frequency transformer. The overall efficiency of the developed power supply prototype is 92.2%, and the efficiency of the high frequency transformer is 0.309% higher than that before optimization. The internal temperature field of the power supply meets the design requirements, and the rationality of the thermal design of the structure is verified. (1) the main circuit of high frequency switching power supply, DC-DC inverter circuit, inverter control circuit, drive circuit, protection circuit and the whole structure of power supply are designed. (2) the loss characteristics of several magnetic core materials under different frequency and flux density are compared and analyzed, and the magnetic core material is optimized. The relationship between the geometric size of the ring core and the loss of the core at high frequency is analyzed, and its normalization formula is derived, which provides the basis for the optimization design of the core size of the ring magnetic core. Based on the Dowell model, the equivalent factor of windings is analyzed, which provides a reference for the selection of winding wires and the layout of windings. (3) the 6kW high frequency transformer is designed based on AP method. The sorting strategy and selection truncation strategy are improved in the NSGA- 鈪

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