| Abstract: | The stabilization of vibration amplitude is an important factor for assuring welding quality. In this paper, the electric parameter for monitoring the output vibration amplitude of the transducer is determined by the analysis of electromechanical analogy,and matching circuits of constant current for the ultrasonic transducer are analyzed and compared. Series matching circuit is designed and analyzed using the method of impedance transformation. The output vibration amplitude of the transducer can be kept constant when the value of electric parameter for the matching circuit is chosen reasonably. The results of analysis is verified by technological experiments. |
