Double-closed-loop control system and method for magnetic suspension 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 suspension flywheel device. According to the system and method, onthe basis that an adjustable lifting assembly is arranged in the magnetic suspension flywheel device to provide auxiliary bearing force with the adjustable size, then double-closed-loop control is adopted, and a first control closed loop drives a magnetic bearing to provide expected magnetic control force according to comprehensive state information of a rotor system, electric information of an electromagnetic control coil and a first given target so as to dynamically respond to external interference by the rotor system; a second control closed loop drives the lifting assembly to provide expected auxiliary bearing force according to the magnetic control force direct-current component information of the magnetic bearing and a second given target so as to solve the problem that the magneticcontrol force of the magnetic bearing generates low-frequency large-amplitude fluctuation along with different flywheel movement working points, and reduce the loss of the magnetic bearing; and meanwhile, the second control closed loop can reduce the direct-current bearing component of the magnetic bearing, improve the dynamic bearing capacity of the magnetic bearing and improve the robustness ofa whole supporting 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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