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이양래(Yang-lae Lee),김현세(Hyun-se Kim),백민혁(Min-hyuck Baek) 한국동력기계공학회 2013 동력시스템공학회지 Vol.17 No.6
High-power ultrasonic promotes a chemical reaction by its own energy, thus it has been used for sonochemistry applications. For example, it has been mostly used for mixing, reaction catalyst, dispersion and disintegration. High-power ultrasonic transducer is made with structure based on a Bolt-clamped Langevin type Transducer (BLT), But it has difficulty in the development because degradation of piezoelectric ceramic by the heat generation of BLT. In this study, for a development of the transducer of 25 kHz and 1000 W used in sonochemistry and industrial cleaning, BLT with a hole in its center and tubular type waveguide of the transducer were designed based on finite element method (FEM). The transducer was fabricated based on the design parameter, and the impedance characteristics are measured experimentally and compared with the numerical results.
윤소남(So-Nam Yun),이양래(Yang-Lae Lee),임의수(Eui-Su Lim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
There are many kinds of solenoid actuator for an automobile. they are used for on-off control of fluid direction or proportional control of the flow rate and the system pressure. Not only the optimal design strategy but also the performance evaluation techniques for the solenoid actuator are very important development procedure because of certification. In this study, the experimental setup was installed and the experiment for deriving the performance evaluation method was conducted. And the existing model and manufactured one were also discussed for confirming the validity of proposed evaluation technique.