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Novel magnetic suspension energy storage flywheel rotor

A technology of energy storage flywheel and flywheel rotor, which is applied in the direction of magnetic circuit rotating parts, magnetic circuit, and mechanical energy control, and can solve problems such as large tensile stress

Inactive Publication Date: 2019-03-22
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the motor rotors are made of sintered NdFeB or cobalt permanent magnet materials. This type of material can withstand large compressive stress, but it cannot withstand large tensile stress. In the case of high-speed rotation, a large centrifugal force will be generated, and must be taken protection measures, and the conventional laminated rotors of motors and magnetic bearings are also difficult to withstand the centrifugal force generated by high-speed rotation, and special high-strength laminated or solid rotors are required

Method used

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  • Novel magnetic suspension energy storage flywheel rotor
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Embodiment Construction

[0010] As shown in the figure, in the figure: upper speed sensor rotor 1; upper magnetic bearing rotor 2; flywheel upper shaft 3; motor rotor sheath 4; magnetic steel partition 5; rotor magnetic steel 6; flywheel lower shaft 7; lower magnetic bearing Rotor 8; Lower speed sensor rotor 9; Thrust disc seat 10. In general, the permanent magnet of the motor in the energy storage flywheel should not only have good magnetic properties, but also have a sufficiently high operating temperature and thermal stability. Due to the high-speed and high-frequency additional losses of the high-speed permanent magnet rotor, the heat dissipation conditions are poor. In order to prevent the irreversible demagnetization of the permanent magnet caused by the overheating of the rotor, the permanent magnet of the motor rotor in this example is made of integral cylindrical samarium cobalt material, which has the best magnetic stability, and its Curie temperature is higher than that of NdFeB, and its tem...

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Abstract

The invention discloses a novel magnetic suspension energy storage flywheel rotor. The novel magnetic suspension energy storage flywheel rotor is composed of a motor rotor, a magnetic bearing rotor, aflywheel upper shaft and a flywheel lower shaft; the motor rotor is adhered to the flywheel upper shaft and the flywheel lower shaft through a magnetic steel partition plate, and is connected with anon-magnetic alloy steel sheath, so that tensile stress generated by a centrifugal force during high-speed rotation can be offset; high-strength laminations are adopted as the laminations of the magnetic bearing rotor, and a high lamination coefficient is ensured so that the magnetic bearing rotor can withstand the centrifugal force generated by the high-speed rotation of the flywheel rotor; a speed sensor is integrated at a position close to the magnetic bearing rotor, and therefore, the detection accuracy of the sensor can be improved. The novel magnetic suspension energy storage flywheel rotor of the present invention is a comprehensive design based on rotor structural strength, dynamic characteristics and electromagnetic characteristics.

Description

technical field [0001] The invention relates to the field of high-speed magnetic suspension energy storage flywheels. Through comprehensive consideration of the technical requirements of magnetic bearing rotors and motor rotors, and in combination with the working conditions of magnetic suspension energy storage flywheels, a novel magnetic suspension energy storage flywheel rotor is proposed. Background technique [0002] The flywheel energy storage system is a mechanical energy storage device that uses a high-speed rotating flywheel to store energy. The stored energy is determined by the moment of inertia and rotational speed of the flywheel rotor. The energy stored by the high-speed rotation of the flywheel is proportional to its moment of inertia. proportional to the square of its rotational speed. Increasing the rotational speed of the flywheel rotor can significantly increase the flywheel's stored energy, and the speed at which the flywheel spins depends on the strength...

Claims

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Application Information

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IPC IPC(8): H02K7/02H02K1/27
CPCH02K1/278H02K7/025Y02E60/16
Inventor 吕东元李延宝吕奇超陈军委
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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