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Curved variable cross-section rotor flywheel energy storage system supported by permanent magnet bearing and magnetic bearing

An electromagnetic bearing and permanent magnet bearing technology, which is applied in the field of flywheel energy storage, can solve the problems of poor structure compactness of the flywheel energy storage system, increase the axial length of the flywheel rotor, and affect the dynamic characteristics of the rotor, so as to improve the rotor dynamics. Features, compact system space size, compact effect

Pending Publication Date: 2019-01-25
HARBIN ELECTRIC CO LTD +1
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  • Application Information

AI Technical Summary

Problems solved by technology

If the flywheel energy storage system is installed with an inner rotor motor and supported by multiple magnetic suspension bearings, the axial length of the flywheel rotor will usually be increased, which will affect the dynamic characteristics of the rotor and lead to poor compactness of the flywheel energy storage system

Method used

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  • Curved variable cross-section rotor flywheel energy storage system supported by permanent magnet bearing and magnetic bearing
  • Curved variable cross-section rotor flywheel energy storage system supported by permanent magnet bearing and magnetic bearing
  • Curved variable cross-section rotor flywheel energy storage system supported by permanent magnet bearing and magnetic bearing

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Embodiment

[0032] Example: see Figure 1 to Figure 5, the curved surface variable cross-section rotor flywheel energy storage system supported by permanent magnetic bearings and electromagnetic bearings in this embodiment includes an energy storage conversion part, a rotor support part and an auxiliary part; wherein, the energy storage conversion part includes: a flywheel rotating body, an integrated Electric / power generation reciprocal bidirectional motor; the rotor support part includes: upper radial electromagnetic bearing 4, lower radial electromagnetic bearing 5, permanent magnetic thrust bearing 9, upper auxiliary bearing 7, lower auxiliary bearing 8; auxiliary part includes: shell body and mandrel 18.

[0033] Among them, the integrated electric / power generation reciprocal bidirectional motor selects the outer rotor permanent magnet synchronous motor 6, the permanent magnet thrust bearing 9, the upper auxiliary bearing 7, the outer rotor permanent magnet synchronous motor 6, and t...

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Abstract

A curved variable cross-section rotor flywheel energy storage system supported by a permanent magnet bearing and an electromagnetic bearing belongs to the technical field of flywheel energy storage. The invention solves the axial length of the flywheel rotor existing in the existing flywheel energy storage system, the permanent magnet thrust bearing, the upper auxiliary bearing, the outer rotor permanent magnet synchronous motor and the lower auxiliary bearing are arranged on the mandrel, and the upper end and the lower end of the flywheel rotary body are in a clearance fit state with the upper auxiliary bearing and the lower auxiliary bearing; A gap is left between the permanent magnet thrust bearing and the upper end face of the flywheel rotary body; The outer rotor permanent magnet synchronous motor is arranged in the flywheel rotating body to drive the flywheel rotating body to rotate; The radial magnetic bearing is fixedly installed on the shell, the magnetic bearing and the outerwall of the flywheel are in a non-contact state, and the flywheel main body is of a curved surface variable cross-section structure. The rotor system of the invention has a compact structure and improves the dynamic characteristics of the rotor.

Description

technical field [0001] The invention relates to a flywheel energy storage system, in particular to a curved-surface variable-section rotor flywheel energy storage system supported by a mixture of permanent magnetic bearings and electromagnetic bearings, and belongs to the technical field of flywheel energy storage. Background technique [0002] As a flexible and adjustable active power source, the flywheel energy storage system actively participates in the dynamic behavior of the system, and can shorten the transient transition process after the disturbance is eliminated, so that the system can quickly return to a stable state. The flywheel energy storage system is mainly composed of flywheel rotors, bearings, integrated electric / power generation reciprocal bidirectional motors, electronic power converters, etc. The integrated electric / power generation reciprocal bidirectional motor realizes the conversion of electric energy and high-speed flywheel mechanical energy. The el...

Claims

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Application Information

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IPC IPC(8): H02K7/02H02K7/09H02K7/08
CPCH02K7/025H02K7/086H02K7/09Y02E60/16
Inventor 赵宇兰赵雷时振刚张秋鸿莫逆杨国军
Owner HARBIN ELECTRIC CO LTD
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