Large-electric-quantity high-power magnetic suspension energy storage flywheel system

Abstract

The invention discloses a large-electric-quantity high-power magnetic suspension energy storage flywheel system. The flywheel system comprises a base, a stator housing, an upper cover, a circular plate with a sealed top end, a rotor system, an upper radial hybrid magnetic bearing stator, a lower radial hybrid magnetic bearing stator, an axial permanent magnet passive magnetic bearing, a hybrid excitation homopolar inductor motor stator, a first fastening bolt connected the base to the stator housing, a second fastening bolt connected the stator housing to the upper cover, a third fastening bolt connecting the upper cover to the circular plate with the sealed top end, a lower-end standby bearing system, a lower-end standby bearing chamber, a reluctance type rotary transformer stator, an upper-end standby bearing chamber and an upper-end standby bearing system. Therefore, the flywheel system has the advantages of compact structure, high utilization rate of rotor specific energy, high rotor strength, low rotating iron loss and the like. The flywheel system of the invention is used for a 15-minute flywheel UPS battery, a power-assisted frequency modulation energy storage battery and ahigh-frequency special charging and discharging battery.

Description

technical field [0001] The design of the invention relates to a high-power and high-power magnetic suspension energy storage flywheel system, in particular to a homopolar induction motor generator with active and passive hybrid magnetic suspension bearing support and permanent magnet electromagnetic hybrid excitation. Background technique [0002] The existing energy storage flywheel motor generator adopts a three-phase permanent magnet synchronous motor, a three-phase asynchronous motor or an electric excitation synchronous reluctance motor. When the energy storage flywheel is discharged, the counter electromotive force of the permanent magnet synchronous motor will decrease as the speed decreases, and the output power of the flywheel motor will also decrease as the discharge depth increases, which cannot guarantee the continuous discharge of the rated power. Although the electric excitation synchronous reluctance motor can keep the counter electromotive force constant as t...

AI Technical Summary

Problems solved by technology

The weight of the rotor supported by the first two rotor support schemes is limited; the safety of the third support scheme cannot be fully guaranteed, and high-speed instability will cause flywheel damage or even serious accidents

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