A double closed-loop control system and method for a magnetic levitation flywheel device

Abstract

The invention relates to the technical field of flywheels, and provides a double-closed-loop control system and method for a magnetic levitation flywheel device. The system and method are based on configuring adjustable lifting components in the magnetic levitation flywheel device to provide adjustable auxiliary bearing capacity, and then adopt double closed-loop control. The first closed-loop control is based on the comprehensive state information of the rotor system and the electrical information of the electromagnetic control coil. Drive the magnetic bearing with the first given target to provide the desired magnetic control force to realize the dynamic response of the rotor system to external disturbances; the second control closed loop provides the desired assistance according to the DC component information of the magnetic control force of the magnetic bearing and the second given target to drive the lifting assembly Bearing capacity, in order to solve the problem that the magnetic control force of the magnetic bearing fluctuates greatly at low frequency with different operating points of the flywheel movement, and reduce the loss of the magnetic bearing. At the same time, the second control closed loop can reduce the DC load component of the magnetic bearing, improve the dynamic load capacity of the magnetic bearing, and increase the robustness of the entire support mechanism.

Description

technical field [0001] The invention relates to the technical field of flywheels, and more specifically, to a double closed-loop control system and method for a magnetic levitation flywheel device. Background technique [0002] In order to improve the dynamic response characteristics of the flywheel energy storage system and reduce the pressure of the bearing system, most of the flywheel energy storage devices currently on the market are placed vertically, so that the main bearing direction of the bearing force is the axial direction. In order to reduce the operating load of the magnetic bearing to reduce the loss of the magnetic bearing and at the same time reduce the requirement on the size of the magnetic bearing, the prior art adopts a lifting component technology in the magnetic levitation flywheel device. In this technology, a magnetically conductive working surface is provided on the upper end surface of the flywheel, and a permanent magnet is installed on the surface...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a double closed-loop control system and method for a magnetic levitation flywheel device, so as to solve the problem that the magnetic bearing in the existing magnetic levitation flywheel device equipped with non-movable adjustable lifting components needs to provide axial bearing capacity as the flywheel works. Different points have the problem of low frequency and large fluctuations

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