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홍정표(J.P. Hong),손정기(J.K. Son),원태현(T.H Won),권순재(S.J. Kwon),홍순일(S.I. Hong),김종달(J.D. Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
Position controls are very important in semiconductor manufacturing devices, machine tools precision measuring instruments, etc. In this paper, a novel encoder of digital and analog hybrid type is proposed. It is shown that from this experiment a high-resolution angle measurement device can be designed by a low cost incremental encoder.
우도(Yu Tao),문채주(C-J Moon),송성근(S-G Song),박성준(S-J Park),조수억(S.E. Cho),김종달(J-D Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, we proposed the electric circuit using one common arm of H-Bridge Inverters to reduce the number of switching component in multi-level inverter combined with H-Bridge Inverters and Transformers. and furthermore we suggested the new multi-level PWM inverter using PWM level to reduce THD(Total Harmonic Distortion). and we used the switching method that can be same rate of usage at each transformer. Also, we tested the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi-level PWM inverter.