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Abstract: The rise and fall of the rotating speed of the flywheel
realize the storage and release of the electrical energy in a flywheel
energy storage system. The rotor dynamics problems such as the natural
whirl frequencies and the critical speeds and the rotor balancing are
dealt with. The low cost hybrid support composed of the permanent
magnetic bearing and the spiral groove hydrodynamic bearing is employed
in the experiments which are proceeded to test the rotor strength and
the characteristics of the charging and discharging of the flywheel
energy storage system. The damping of the lower support is adjusted, the
flywheel is balanced and the energy loss and the generating of the
electricity are tested in the experiments. The flywheel reaches its
deigned rotating speed of 42.0kr/min and stores energy of 497 W·h. The
usable electricity arrives at 290 W·h when the flywheel falls from
42.0kr/min down to 13.8kr/min.
Key words: Flywheel energy storage system Rotor dynamics
CLC No: TH133
清华大学基础研究基金资助项目(JC1999030). Received 20011008, received in revised form
20020420
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