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김병수(B. S. Kim),구동식(D. S. Gu),임장익(J. I. Lim),배용채(Y. C. Bae),이욱륜(W. R. Lee),김희수(H. S. Kim),최병근(B. G. Choi) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
Flywheel energy storage system (FESS) is defined as a high speed rotating flywheel system saving electric power which is a surplus power in normal days. The FESS is proposed as an efficient energy storage system because it has high accumulation energy when it is operated in high speed without mechanical problem It is consisted of flywheel, motor/generator, low friction bearings and so on. To develop a FESS, it has to be passed on the simulation and experiment and those are difficult and take a lot of time. Especially, the simulation is depending on modeling method. In common simulation software using 3D model, the 3D model is designed by rod with point masses for disks to get correct result of rotor dynamics. But, in the FESS, point masses cannot substituted flywheel because of shape. Therefore, in this research, we will propose a easy modeling method using 2D for FESS. Rotor dynamic program for it was coded by Matlab. And the result from 2D model was compared with it from common package software, MSC. Nastran and ANSYS Workbench. And then, modal test had done.
Design and Construction of 10 kWh Class Flywheel Energy Storage System
정세용,한상철,한영희,박병준,배용채,이욱륜,Jung, S.Y.,Han, S.C.,Han, Y.H.,Park, B.J.,Bae, Y.C.,Lee, W.R. The Korean Superconductivity Society 2011 Progress in superconductivity Vol.13 No.1
A superconductor flywheel energy storage system (SFES) is an electro-mechanical battery which transforms electrical energy into mechanical energy for storage, and vice versa. A 10 kWh class flywheel energy storage system (FESS) has been developed to evaluate the feasibility of a 35 kWh class SFES with a flywheel $I_p/I_t$ ratio larger than 1. The 10 kWh class FESS is composed of a main frame, a composite flywheel, active magnetic dampers (AMDs), a permanent magnet bearing, and a motor/generator. The flywheel of the FESS rotates at a very high speed to store energy, while being levitated by a permanent magnetic bearing and a pair of thrust AMDs. The 10 kWh class flywheel is mainly composed of a composite rotor assembly, where most of the energy is stored, two radial and two thrust AMD rotors, which dissipate vibration at critical speeds, a permanent magnet rotor, which supports most of the flywheel weight, a motor rotor, which spins the flywheel, and a central hollow shaft, where the parts are assembled and aligned to. The stators of each of the main components are assembled on to housings, which are assembled and aligned to the main frame. Many factors have been considered while designing each part of the flywheel, stator and frame. In this study, a 10 kWh class flywheel energy storage system has been designed and constructed for test operation.