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超声清洗技术已经在国内有了一定程度的应用,但是超声清洗电源的负载压电换能器在实际环境中易受到外界干扰,使得其阻抗特性变化不定,最终导致电源的工作效率不高,甚至严重失谐损坏电源。鉴于以上问题,基于负载压电换能器静态模型和动态特性,提出一种在较大功率场合应用的高效超声清洗电源的设计方案。该方案在不控整流单元之后加入Boost斩波电路,使得在直流侧实现调功和有源功率因数校正(APFC),减少电源对于电网的污染,其中,APFC控制采用电压电流双闭环控制。为了提高功率输出,逆变电路采用全桥电路,输出频率跟踪利用Fuzzy-PID多模态控制,以提高控制的速度和动态性能。通过Matlab/Simpower仿真实验证明了设计方案的可行性和高效性,为超声清洗电源实际应用提供参考。
Ultrasonic cleaning technology has been used to a certain extent in China, but the load of ultrasonic cleaning power supply piezoelectric transducer is easily disturbed by external environment in actual environment, which makes its impedance characteristics fluctuate, leading to the inefficiency of power supply and even Serious detuning damage to the power supply. In view of the above problems, based on the static model and dynamic characteristics of the piezoelectric load transducer, a design scheme of high efficiency ultrasonic cleaning power supply for higher power applications is proposed. This scheme joins the Boost chopper circuit after the rectifier unit is not controlled, so as to realize the power regulation and active power factor correction (APFC) on the DC side to reduce the pollution of the power supply to the power grid. The APFC control adopts the double loop control of voltage and current. In order to improve the power output, inverter circuit using full-bridge circuit, the output frequency tracking using Fuzzy-PID multi-mode control to improve control speed and dynamic performance. Through Matlab / Simpower simulation experiments to prove the feasibility of the design and high efficiency, for the practical application of ultrasonic cleaning power to provide a reference.