Development Of Broadband Adaptive High Power Ultrasonic Power Supply For Machining

With the rapid development of science and technology,more and more advanced equipment and systems are being researched and developed.The requirements of advanced equipment in performance and other aspects are very high,and the requirements for the required materials are also improved.Now many new hard and brittle materials are widely used in various fields of national life.Through research and field processing,it is found that many hard and brittle materials have many unique advantages Different performance,but the processing is very difficult,the traditional processing method in the processing quality and processing speed has been unable to meet people's requirements,it is found that the ultrasonic vibration assisted processing technology can achieve high precision and efficient processing of hard and brittle materials,and in the ultrasonic vibration assisted processing technology,the ultrasonic power supply plays a very important role,which directly affects the quality of material processing Therefore,this paper develops a set of broadband adaptive high-power ultrasonic power supply for machining.This paper first introduces the significance,background and research status of the wide-frequency adaptive high-power machining ultrasonic power supply.Compared with the traditional ultrasonic power supply which can only match the fixed transducer in the market,it is proposed that any energy exchanger with resonance frequency of 15 k Hz-40 k Hz can be matched;the rectifier voltage regulating circuit,high frequency inverter circuit,impedance matching circuit and voltage electricity are compared with the traditional ultrasonic power supply which can only match the fixed transducer in the market The hardware parameters of flow sampling circuit are calculated and analyzed and the device selection is carried out.According to the impedance and vibration frequency of typical mechanical processing transducer,the output frequency of the broadband adaptive high power ultrasonic power supply is 15 k Hz-40 k Hz and the maximum output power is 2k W.In this paper,Matlab / Simulink software is used to simulate the whole circuit topology and control system of the device.The simulation results verify the correctness and feasibility of the broadband adaptive high-power ultrasonic power supply system designed in this paper.The simulation results show that in constant power mode,after setting the power,through PI regulation,the power supply can quickly reach the set power and output stably;The coarse and fine frequency tracking algorithm combined with variable step size is designed to achieve faster and higher accuracy of resonant frequency tracking and ensure that the transducer is in resonant state in real time.The hardware development of the device takes single-phase BUCK voltage regulating circuit and full bridge inverter topology as the core of the main circuit.The central main control unit regulates the output power by controlling the duty cycle of the BUCK voltage regulating circuit driving signal,and adjusts the output voltage frequency of the high-frequency inverter circuit by controlling the frequency of the driving signal of the inverter circuit to make the transducer work in the resonant state.Finally,based on the above hardware platform,an application software platform for real-time monitoring of ultrasonic power supply and transducer resonance is developed,which can realize basic parameter setting,fault judgment,real-time display of output power and frequency,historical data storage and other functions.And the system performance test is completed in the laboratory and factory,the test results meet the requirements of field machining,and all the functions meet the design objectives of this paper.