高频并联谐振逆变电源的研究

发布时间：2018-04-28 03:48

本文选题：感应加热 + 并联谐振　；参考：《郑州大学》2014年硕士论文

【摘要】：本课题的研究对象是高频感应加热电源。在对感应加热电源的发展过程以及国内外感应加热电源的发展现状了解的基础上，分别对应用于感应加热电源的两种谐振方式进行了分析，并根据课题需要，选定了并联谐振作为本课题中高频感应加热电源的逆变拓扑结构。然后对高频感应加热电源电流工作模式，和电流馈电拓扑做了简要介绍，根据电流模式的不足对电路做了斜率补偿分析，并根据实际电路需要对控制电路反馈电流做了斜率补偿。然后确定了控制芯片为电流型控制芯片。本文对并联谐振逆变电路的工作状态进行了分析，容性、阻性和感性情况下分析。对主电路中的主要器件进行了计算和选取，并且对辅助电源、变压器、电流互感器和滤波电感等元器件具体制作做了计算和制作过程做了详细的介绍。整个设计的恒流源输出功率为3kW，同时根据本文设计要求选择了UC3846芯片，并根据UC3846的同步端，实现了同步控制及频率跟踪，对精密全波整流电路、保护电路和驱动电路进行了计算设计。设计了开机扫频电路，并配合频率跟踪电路实现了电源的软启动。在样机实验时遇到了一些实际问题，对其分析并提出了解决的办法，最后使电源实现了比较理想的工作状态。本文结尾给出了主电路及驱动电路的原理图和PCB打样图。在实验中，测得了部分实际波形。从结果看出每部分都能达到预期结果。最后完成整机调试，通过实验波形验证，本设计达到了预期的要求。
[Abstract]:The research object of this subject is high frequency induction heating power supply. Based on the understanding of the development process of induction heating power supply and the development status of induction heating power supply at home and abroad, two kinds of resonance modes applied to induction heating power supply are analyzed, and according to the need of the subject, The parallel resonance is selected as the inverter topology of the high frequency induction heating power supply. Then, the current working mode and current feed topology of high frequency induction heating power supply are briefly introduced, and the slope compensation analysis of the circuit is made according to the deficiency of current mode. The feedback current of the control circuit is compensated by slope according to the actual circuit requirement. Then the control chip is determined to be a current-mode control chip. In this paper, the working state of parallel resonant inverter circuit is analyzed, including capacitive, resistive and inductive conditions. The main components in the main circuit are calculated and selected, and the fabrication process of auxiliary power supply, transformer, current transformer and filter inductor is introduced in detail. The output power of the whole constant current source is 3kW, and the UC3846 chip is selected according to the design requirements of this paper. According to the synchronous terminal of UC3846, the synchronous control and frequency tracking are realized, and the precision full wave rectifier circuit is realized. Protection circuit and drive circuit are calculated and designed. The frequency sweep circuit is designed, and the soft start of the power supply is realized with the frequency tracking circuit. Some practical problems are encountered in the prototype experiment, and the solutions are put forward and analyzed. Finally, the ideal working state of the power supply is realized. At the end of this paper, the schematic diagram and PCB proofing diagram of main circuit and drive circuit are given. In the experiment, some actual waveforms are measured. From the results, we can see that each part can achieve the expected results. Finally, the debugging of the whole machine is completed, and the experimental waveform verifies that the design meets the expected requirements.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM464

【参考文献】