摘要
本文论述２０ＫＨＺＰＷＭ（脉冲宽度调制）型大功率超声波发生器的原理和电路组成。ＰＷＭ信号是由性能优越的ＴＬ４９４集成电路产生，高频逆变器采用国际先进的磁性材料和ＩＧＢＴ功率器件构成。逆变器将输出的高频电压送入超声波换能器，从而辐射出超声波。该系统具有电路简单，工作可靠，体积小，成本低，输出功率调节方便，效率高，实用性强等特点。
This thesis expounds the theory and the circuit system of the 20 KHZ PWM(pulse width modulability)model Powerful ultransonic generator,PWM signal results from the superior integrated circuit,TL494;and the high freguencg inverter adopts the worlds advanced magnetic materials and the IGBT power devices.The inverter sends the output high frequency voltage into the ultransonic transducer,so the ultransonic radiates out This system has the Practical functions and the steady working abilities with its simpler circuit,smaller volume,lower costs,higher efficiency and the characteristics of convenient adjusting of the output
出处
《郑州工业大学学报》
1997年第3期74-77,共4页
Journal of Zhengzhou University of Technology
