基于MCU和FPGA双处理器的超音频感应加热电源设计

摘要

Medium frequency induction heating power supply will be proposed based on the dual microprocessor (XC2267 of Inifneon and EP2C5T144C8N of ALTERA) and the IGBT was used as the main switching element in this thesis. XC2267 is the main control chip which does the increment PI algorithms and realizes the voltage and current double closed-loop control. Three-phase thyristor rectifier method based on the phase self-adjusting of FPGA is proposed. A method for swept-frequency start circuit is designed to implement the transition between the high-power and low-power. The invert system uses the compound control of improved PWM and frequency phase lock to improve the control accuracy and efifciency. Lastly, by using bench, the circuit is tested and the feasibility and effectiveness of the whole system are veriifed.%本文提出一种采用DSP英飞凌XC2267与ALTERA公司的EP2C5T144C8N为双控制核心，主开关器件为IGBT的超音频感应加热电源的设计方案。DSP（xc2267）作为主控芯片进行增量式PI算法，实现了电压电流双闭环控制。提出基于FPGA的相序自适应的三相可控硅整流控制方法；设计一种扫频启动电路，实现由他激到自激启动，实现了高功率和低功率之间的转换。逆变系统采用改进的PWM频率相位锁相和移向调功的复合控制来提高控制精度和效率。最后，通过实验台架对电路进行实验，给出实验结果，验证了整个系统的可行性和有效性。