發(fā)布時間：2018-05-04 19:25

  本文選題：超聲波電源 + 模糊控制器��； 參考：《江南大學(xué)》2014年碩士論文

【摘要】：隨著生物處理技術(shù)的不斷發(fā)展，對其處理效率要求越來越高，將超聲技術(shù)應(yīng)用到生物處理方面，可有效的提高處理的效率，因此超聲波電源的研究就顯得至關(guān)重要，尤其是提高工作效率和智能化方面。 本文主要對超聲波電源頻率跟蹤和功率調(diào)節(jié)進(jìn)行研究，在頻率自動跟蹤方面，采用Fuzzy-DPLL的復(fù)合頻率跟蹤方式，當(dāng)頻率誤差較大時，采用模糊控制器進(jìn)行調(diào)節(jié)，使誤差值減小，再采用數(shù)字鎖相環(huán)（DPLL）調(diào)節(jié)，實現(xiàn)頻率的自動跟蹤；而在功率調(diào)節(jié)方面，對Buck變換器采用電壓電流雙閉環(huán)控制策略，，同時采用帶死區(qū)的積分分離式PID算法，來調(diào)節(jié)PWM的占空比。并且用Matlab中的Simulink開發(fā)環(huán)境和模糊邏輯工具箱對頻率跟蹤方法、功率調(diào)節(jié)方法進(jìn)行建模仿真，并對仿真結(jié)果進(jìn)行分析驗證。 本文以30kHz/2kw的超聲波電源為設(shè)計對象，對系統(tǒng)各個部分方案設(shè)計進(jìn)行對比和選取。對主電路中功率器件的具體參數(shù)進(jìn)行設(shè)計及選型，主要包括整流橋、Buck變換器、逆變器、高頻變壓器、匹配電感、驅(qū)動電路等；控制電路是以TMS320F2812為核心的控制電路，主要包括電源電路、時鐘電路、接口電路等；采樣電路是用互感器采集換能器兩端的電壓、電流信號，送入DSP中實現(xiàn)頻率的跟蹤和功率調(diào)節(jié)。為了保證電源能安全可靠的工作，還設(shè)計了保護電路如過壓保護、過流保護、過熱保護。 最后，設(shè)計了DSP的最小系統(tǒng)、主電路與驅(qū)動電路，并制成PCB板，搭建實驗樣機進(jìn)行相關(guān)的實驗驗證，電源工作穩(wěn)定，測量實驗輸出波形和數(shù)據(jù)，結(jié)果驗證了設(shè)計的合理性與可靠性。
[Abstract]:With the development of biological treatment technology, the efficiency of ultrasonic treatment is becoming more and more high. The application of ultrasonic technology to biological treatment can effectively improve the efficiency of treatment, so the research of ultrasonic power supply is very important. Especially in improving work efficiency and intelligence. In this paper, the frequency tracking and power regulation of ultrasonic power supply are studied. In frequency automatic tracking, the compound frequency tracking method of Fuzzy-DPLL is adopted. When the frequency error is large, the fuzzy controller is used to adjust the error value. Then the digital phase-locked loop (DPLL) is adopted to realize the automatic tracking of the frequency, and in the aspect of power regulation, the voltage and current double closed loop control strategy is adopted for the Buck converter, and the integral separated PID algorithm with dead time is used to adjust the duty cycle of the PWM. The Simulink development environment in Matlab and the fuzzy logic toolbox are used to model and simulate the frequency tracking method and the power regulation method, and the simulation results are analyzed and verified. In this paper, the ultrasonic power supply of 30kHz/2kw is taken as the design object, and the design of each part of the system is compared and selected. The specific parameters of power devices in the main circuit are designed and selected, including rectifier bridge Buck converter, inverter, high frequency transformer, matching inductor, driving circuit, etc. The control circuit is a control circuit with TMS320F2812 as the core. The sampling circuit uses the transformer to collect the voltage and current signals at the two ends of the transducer and to realize the frequency tracking and power regulation in the DSP. In order to ensure the safe and reliable operation of the power supply, protection circuits such as overvoltage protection, overcurrent protection and overheating protection are also designed. Finally, the minimum system of DSP, the main circuit and driving circuit are designed, and the PCB board is made, and the experimental prototype is built to verify the experiment. The power supply is stable, and the experimental output waveform and data are measured. The results verify the rationality and reliability of the design.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB559;TP273

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