高压LCC谐振变换器研究

发布时间：2018-06-15 22:42

本文选题：谐振变换器 + LCC串并联谐振　；参考：《北方工业大学》2017年硕士论文

【摘要】：近年来,随着科学技术的进步,电力电子技术得到长足的发展,电力电子器件制作工艺也得到极大的提高,电力电子技术随之被应用于各行各业中。其中遍及军用工业、民用工业、航空航天、静电除尘、医疗等领域。本文从高压谐振变换器基本原理出发,对主电路拓扑、开关模态、硬件设计以及控制策略等方面进行了详细的讨论,并提出实现方案。首先,在基波近似法的原理基础上,对LCC谐振变换器进行了电路等效,建立了 LCC谐振变换器的数学模型,并对谐振变换器电压传输特性进行分析。最后分析了在变频控制策略下,LCC串并联谐振变换器在CCM和DCM模式下的工作过程。通过对谐振变换器的建模与分析,为后续的仿真和实验提供了理论依据。其次,在MATLAB和Psim仿真环境中搭建了 LCC谐振变换器的联合仿真模型,其中在Psim仿真环境中搭建主电路部分,在MATLAB中搭建了系统的控制部分。并主要从调压方式的选择,系统开机,加载减载等暂态过程以及系统功率器件软开关实现情况等几个方面进行研究。通过仿真验证了控制策略以及调压方式的可行性与优越性。最后,介绍了 LCC谐振变换器硬件平台的搭建与软件程序的设计,硬件部分包括主电路、采样电路、驱动电路以及变压器的设计;软件部分主要包括控制程序及算法的设计,实现了逆变器在闭环控制系统下稳定高效的运行。最后对系统加载、减载、启动以及过压保护等情况做了实验,通过实验验证了设计方法的可行性以及理论的正确性。
[Abstract]:In recent years, with the progress of science and technology, power electronics technology has been greatly developed, power electronic device manufacturing technology has been greatly improved, power electronics technology has been applied in all walks of life. Which throughout the military industry, civil industry, aerospace, electrostatic dust removal, medical and other fields. Based on the basic principle of high voltage resonant converter, this paper discusses the topology of main circuit, switching mode, hardware design and control strategy in detail, and puts forward the implementation scheme. Firstly, on the basis of the fundamental approximation method, the circuit equivalent of LCC resonant converter is presented, the mathematical model of LCC resonant converter is established, and the voltage transfer characteristics of the resonant converter are analyzed. Finally, the working process of LCC series-parallel resonant converter in CCM and DCM mode is analyzed. The modeling and analysis of the resonant converter provide theoretical basis for subsequent simulation and experiment. Secondly, the combined simulation model of LCC resonant converter is built in MATLAB and Psim simulation environment, in which the main circuit is built in Psim simulation environment, and the control part of the system is built in MATLAB. This paper mainly studies the selection of voltage regulation mode, the transient process of system startup, loading and load reduction, and the realization of soft switch of power device. The feasibility and superiority of control strategy and voltage regulation are verified by simulation. Finally, the hardware platform of LCC resonant converter and the design of software program are introduced. The hardware includes the design of main circuit, sampling circuit, driving circuit and transformer, and the software part mainly includes the design of control program and algorithm. The inverter runs stably and efficiently under the closed loop control system. Finally, the system loading, load reduction, startup and overvoltage protection are tested, and the feasibility of the design method and the correctness of the theory are verified by experiments.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM46

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