【作者】 陈勇；

【导师】 王华民； 石文渊；

【作者基本信息】 西安理工大学 ， 检测技术与自动化装置， 2008， 硕士

【摘要】 为了在保证开关管安全的前提下,以现有的器件条件来实现逆变器的高频化,本文研究了感应加热电源中的倍频方式实现。首先介绍了感应加热的基本原理及感应加热技术的发展动态,分析比较了感应加热电源的谐振槽路和常用控制技术,选择了更适合高频应用的串联谐振来实现倍频式感应加热电源。其次文中给出了一种新的倍频逆变拓扑结构以及吸收电路的参数设计方法,实现了电路工作频率的提高,以及功率器件开关条件的改善,降低了功率MOSFET转换过程中的损耗;通过对倍频逆变电路工作过程的分析,确定了倍频逆变电路的信号触发方式,解决了断路引起的尖峰电压的问题。进行了实验样机的软硬件设计和实现。最后通过Pspice仿真及工作频率为100kHz的倍频式感应加热电源的实验样机的实验结果,验证了研究工作的可行性及正确性。更多还原

【Abstract】 This paper researched the application of double frequency method in induction heating power supply with using existing devices to actualize high frequency inverter under the condition that ensuring the safety of the switch transistors.Firstly, the paper introduced the basic principles and development trends of induction heating technology. It analyzed and compared resonance tank circuit and commonly used control techniques of the induction heating power. It selected series resonance which more suitable for high-frequency applications to achieve double frequency induction heating power.Secondly, this paper proposed a new double frequency inverter topology and gave the parameters designing method of the snubber circuit .It realized the increasing of working frequency and improved the switching condition of power devices, and reduced the losses of the power MOSFETs in the process of conversion. Through the analysis of working process of double frequency inverter circuits, it determined the signal triggering mode of the double frequency inverter circuit and solved the problem of spike voltage caused by open circuit. It designed and implemented an experimental prototype.Finally, through the Pspice simulation and the experimental results of the experimental prototype which working frequency was 100 kHz, it verified the feasibility and correctness of the research works.更多还原