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고종수(Jong Soo Ko),이대식(Dae-Sik Lee),이명래(Myung Lae Lee),최창억(Chang Auk Choi),김윤태(Youn Tae Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
A laterally driven electromagnetic microactuator (LaDEM) is introduced, and a micro-optical switch is<br/> designed and fabricated as an application. LaDEM offers parallel movement of the microactuator to the<br/> silicon substrate surface (in-plane mode). Poly-silicon-on-insulator (poly-SOI) wafers and a reactive ion<br/> etching (RIE) process were used to fabricate high-aspect-ratio vertical microstructures, which allowed the<br/> equipping of vertical micro-mirrors. A fabricated single leaf spring had a width of 1.2 mm, thickness of 16 mm,<br/> and length of 800 mm. The resistance of the fabricated leaf spring for the optical switch was 5 W. The<br/> deflection of the leaf spring started to profoundly increase at about 400 mA, and it showed snap-through<br/> phenomenon over that current value. Owing to the snap-though phenomenon, a large deflection of 60 mm was<br/> detected at 566 mA.
Wireless power transfer using resonance with small resonator
김용해(Yong-Hae Kim),강승열(Seung-Youl Kang),전상훈(Sanghoon Cheon),이명래(Myung-Lae Lee),윤재훈(Je-Hoon Yun),조인귀(In-Kui Cho),문정익(Jung-Ick Moon),김성민(Seong-Min Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
We investigate the wireless power transmission characteristics through resonant coupling using small resonator. To reduce the device's size, we used the 4-layer PCB resonator for the sending part. As the geometry of resonator is reduced, the impedance matching becomes more important. By tuning the power coil's length, we can succeed to obtain the reflection free condition.