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플라이애시 및 PET섬유를 혼입한 변형경화형 시멘트 복합체(SHCC)의 휨성능 평가
차준호(Cha Jun-Ho),송선화(Song Seon-Hwa),장용헌(Jang Yong-Heon),전에스더(Jeon Esther),윤현도(Yun Hyun-Do) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
There have been numerous studies to develop eco-friendly concrete. The attempt to reduce the amount of cement usage is suggested as one of the solutions for eco-friendly concrete. So this study, Some investigations have been presented for retrofitting and/or strengthening structural elements. Particularly to avoid seismic damage, many researchers have invested seismic resistance material development. Strain-hardening cement composite(SHCC) expects excellent seismic resistance performance. SHCC is one in innovative method that it mixes the fiber of about 2% in the cement composite. To reduce the amount of cement usage, fly ash are widely used as the mineral admixture. Meanwhile, PET fiber made of recycled PET bottle is a type of recycled material, which can be used to construction of database for development and application of Green SHCC.
공간전압벡터 PWM 방식을 이용한 영구자석형 동기전동기의 가감속 운전 특성 고찰
차준호(Jun-Ho Cha),황동원(Dong-Won Hwang),조윤현(Yun-Hyun Cho) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper is estimated the transient characteristic of permanent magnet synchronous motor to reduce the rising time according to the speed reference. It's controller is adopted space vector PWM method with PI controller. Control board used TMS320LF2407(DSP) and the motor is 1.5㎾ 8 poles SPMSM. As the result, the experiment results compared to simulation results.