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Power Supply System of DC/AC Micro Grid System
K.Yukita,K.Ban,Y.Goto,K.Ichiyanagi,K.Hirose,T.Ushirokawa,Y.Okui,H.Takabayashi 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper proposes an AC/DC power supply system with DGs using the parallel processing method. The purpose of this system is to supply the power without connecting to the utility gird. The DGs consist of photovoltaic (PV), -and wind generators (WG), and the main energy source of this system is the DGs and the UPS battery. When the system does not get enough energy from the DGs, and the power supply of the battery runs out, this system connects to the utility grid and begins to charge the battery and supply to the load. In this study, we focused on the AC power supply and DC power supply from DGs. Then, the converters of DGs use two types, DC/AC type and DC/DC type. The power supply system has been operated with the actual loads of 20 ㎾ in the campus of the Aichi Institute of Technology. This paper reports on our study of DC and AC power supplies in the event of a system anomaly.
Magnetic Properties of Fe-doped NiO Nanoparticles
A. Kurokawa,N. Sakai, L. Zhu,H. Takeuchi,S. Yano,T. Yanoh,K. Onuma,T. Kondo,K. Miike,T. Miyasaka,Y. Ichiyanagi 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Ni1−xFexO (x = 0, 0.05, 0.1) nanoparticles with several nanometers encapsulated with amorphousSiO2 were prepared by our novel preparation method. A NiO single phase structure was confirmedusing the X-ray diffraction measurements. It is considered that Ni ions are replaced by Fe ionsbecause it is observed that the lattice constant decreases. The temperature dependence behaviorof the magnetization revealed that the blocking temperature, TB, shifted from 17 to 57 K as theamount of Fe ions increased, and that below TB, ferromagnetic behaviors were exhibited. Thecoercive force, HC, increased from 0.8 to 1.5 kOe as the amount of Fe ions increased.