【作者】 车保川；

【导师】 屈百达；

【作者基本信息】 江南大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 随着FPGA技术的出现,凭借着它在设计上的优越性在各电子设计领域上备受关注。近年来,FPGA在通信领域得到了广泛的应用,在电力电子系统中却并不多,基于这种情况,本课题研究了FPGA在电源系统中的应用,用FPGA来实现超声波电源系统的控制器。本文首先对超声波电源的基本原理、发展现状等做了简要概述。接着介绍了超声波电源的基本结构组成,分析了超声波电源两种不同类型的主电路结构形式及其各自的优缺点,阐述了串联谐振型超声波电源的调功方式。在此基础上确定了本文的设计方案。设计了超声波电源的主电路并计算了各个组成部分器件的参数,同时对主电路做了PSIM仿真,为以后的实验奠定了基础。文中着重分析研究了电源控制电路的原理及其具体实现方法,给出了详细的硬件电路设计原理图和各自的工作原理说明,并且设计了超声波电源的驱动及保护电路。最后给出超声波电源的实验结果及结论。本文主要有三个重点。重点之一是阐述超声波电源移相调功方式的逆变电路控制技术。重点之二是在超声波电源的主电路分析。重点之三,即本课题的首要创新点,是基于FPGA设计系统控制电路模块,如区别于模拟电路锁相环的全数字锁相环的设计、PWM信号发生器等,对各模块进行软件仿真并且把各模块整合到系统中进行了实验验证。该点的意义在于实现了超声波电源由模拟电路控制系统向数字化控制系统的转变。更多还原

【Abstract】 With the technique development of FPGA, more attention is paid to the design of digital control system based upon FPGA for its advantages in designing circuit. FPGA technique is mainly applied to communication field, but there is few application to electric power field.As a result, this paper researches into the controller of ultrasonic power supply based on FPGA.Firstly, this paper discusses the primary principle and actuality of ultrasonic power supply. The basic structure of ultrasonic power supply and two main circuits of different types are discussed, with advantages and disadvantages. Moreover, this section discusses some power modulation methods. After ascertaining the scheme, this paper gives the main circuit design and the parameters of each component, which make up the whole system. Simulation results of the main circuit through PSIM prove that the calculation process above is reasonable. This paper analyzes the power supply’s control system as one of the important emphases, and provides the system’s schematic circuits.Meanwhile, this paper analyzes the driver circuit and the protection circuit of the ultrasonic power supply. Finally, this paper gives the result and conclusion about the experiment design.In this paper, three emphasizes are presented.The first emphasize is to present the control methods in phase-shifted power modulation inverter circuit.The second is to introduce the process of main circuit of the ultrasonic power supply. The third one is to design the system’s control circuit realized through FPGA, such as digital Phase-locked loop, PWM signal creator and so on. This is the most important innovation of this paper based upon modern EDA. The meaning of the innovation is to realize the transition from analogy control system to digital control system of the ultrasonic power supply.更多还原