Research On Ultrasonic Power Supply Based On Application Of FPGA

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.