The Research of Ultra Sonic Controller for Operating BLT

BLT를 구동하기 위한 초음파 제어기에 관한 연구

The purpose of this research was to discuss the system that operated Ultra sonic transducer of Pelzo electric ceramics type. The structure of controller was made up of digital signal part drive and feedback circuit, and half bridge inverter. Digital signal part was designed to gain the stable oscillation frequency by making consideration of pointed resonance bandwidth. We tried to control inverter by forward feedback condition because BLT based on the flexibility of elements such as temperature and load condition. In addition, transducer was operated as inverter in order to enhance its power efficiency. In this experiment, output voltage waveform and current waveform have been observed by using BLT.