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The limit of the maximum speed of flywheel rotation in a flywheel energy storage system (FESS) is broken with the improvement of modern science and technology <xref ref-type="bibr" rid="ref4 ref5 ref6">[4]</xref>– <xref ref-type="bibr" rid="ref7">[7]</xref>. The FESS in this paper is designed for short-time and high-power application...
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