PWM&PFM控制感应加热技术研究

【作者】 吕宏；

【导师】 张仲超；

【作者基本信息】 浙江大学 ， 电力电子与电力传动， 2003， 硕士

【摘要】 本文从感应加热基本原理出发，概述了感应加热技术的及现状，主要介绍了容性PWM&PFM控制方法在IGBT器件组成的串联逆变感应加热电源中的应用。 第一章主要概述了感应加热的基本原理，以及国内外感应加热技术的发展及现状，并简述了本课题所做研究工作的实际意义和主要内容。 第二章对感应加热电源中的电流型逆变器和电压型逆变器作了比较分析，归纳了串联谐振逆变器几种常用的调功方法，对这几种控制方法的优缺点进行了比较，提出了适用于中小功率感应加热的容性PWM&PFM控制方法。 第三章分析了容性PWM&PFM控制方法电路工作原理，提出了实现开关器件软开关的解决方法，并给出了实用的主电路拓扑。 第四章给出了IGBT器件组成的全桥串联逆变感应加热电源中应用容性PWM&PFM控制方法时电路各元器件参数的设计及计算方法。 第五章给出了实现容性PWM&PFM方法的控制电路和保护电路，介绍了电路原理。 第六章对实验波形进行了分析、通过实验结果验证了容性PWM&PFM控制方法在IGBT组成的串联逆变感应加热电源中应用的可行性。 论文最后，对本课题所做的工作作了一个简单的总结。更多还原

【Abstract】 First, this paper gives a brief introduction to the basic theory of induction heating and outlines the development and the status of the induction heating technique, and the method of capacitive PWM&PFM control in full-bridge series capacitor compensated resonant induction heating inverter used IGBT is discussed mainly.Chapter 1 gives a brief introduction to the basic theory of induction heating, then outlines the development and the status of the induction heating technique, and presents the actual meaning of the research and the main content of this paper.Chapter 2 compares the differences of the current-fed converter and the voltage-fed converter used in induction heating power, then induces the power regulation methods of the series resonant inverter and compares the characteristic of these methods. And then, a capacitive PWM&PFM control method which is suitable for medium and small power out induction heating is given.Chapter 3 discusses the principle of capacitive PWM&PFM control method and solves the soft switch problem of the converter, gives the main topology of the main circuit.Chapter 4 presents the design method of IGBT full-bridge voltage-fed series capacitor compensated resonant induction heating inverter used capacitive PWM&PFM control method.Chapter 5 presents the control circuit of capacitor compensated resonant induction heating inverter used capacitive PWM&PFM control method and introduces the principle of the control circuit.Chapter 6 analyzes the result of the experiment and verifies the feasibility of the capacitive PWM&PFM control method used in IGBT series resonant inverter of induction heating. At the end of this paper, gives a summation for the whole dissertation.更多还原