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

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...

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 flywh

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