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김민규(M.K. Kim),김재식(J.S. Kim),방상석(S.S. Bang),최재호(J.H. Choi) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
This paper describes the PWM-VSI controller of three-phase UPS system using stationary reference frame This controller meets the specification the UPS inverter output voltage even under the unbalanced or nonlinear load. This controller is also constructed with duble control loop of the outer voltage control loop and the inner current control loop For the fast response of the output voltage control, yhr inner current control loop of the capacotor current os used To get the good property against overshoot, the IP controller us used. The outer voltage controller IS designed with P controller and the high gain transfer function is used for the zero steady state error. All control gains of both controller is designed base on the CDM method
황치선,홍성훈,황치영,조성목,김용해,서동우,심재식,이정익,이진호,Hwang, C.S.,Hong, S.H.,Hwang, C.Y.,Cho, S.M.,Kim, Y.H.,Suh, D.,Sim, J.S.,Lee, J.I.,Lee, J.H. 한국전자통신연구원 2018 전자통신동향분석 Vol.33 No.6
Metamaterials are artificial media that can control the properties of waves at will. Active photonic metadevice technologies cover the device and material technologies that control the visible and IR light through an external signal (mainly an electrical signal). The application areas of active photonic metadevices are tremendous for example holography, active HOE, bio imaging, IR imaging, telecommunication, and optoelectronic devices. In this paper, the technical trends and prospects of active metamaterials, active meta holography, active meta devices, nano-optical telecommunication devices, and IR imaging meta devices are reviewed.