An AC-DC five-degree-of-freedom cone-spherical hybrid magnetic bearing for a vehicle flywheel battery

Abstract

The invention discloses an AC / DC five-degree-of-freedom cone spherical surface mixed magnetic bearing for a vehicle-mounted flywheel battery. A rotor is coaxially sleeved with a radial stator and an axial stator. The center part of the rotor is a thick cylinder. The upper and lower ends of the thick cylinder are each in smooth connection with a thin cylindrical through a circular truncated cone body. The sidewalls of the upper and lower circular truncated cone bodies are convex cone spherical surfaces. The radial stator is composed of an upper radial stator body and a lower radial stator body which are arranged in longitudinal symmetry in the axial direction. Three radial stator poles are uniformly arranged on the circumference of the yoke part of each of the upper radial stator body and the lower radial stator body. A radial control coil is wound around each radial stator pole. The surface of a pole shoe of each radial stator pole is a convex cone spherical surface facing the corresponding convex cone spherical surface, and a radial air gap is reserved between each convex cone spherical surface and the corresponding convex cone spherical surface. The axial stator is composed of an upper axial stator body and a lower axial stator body which are arranged in longitudinal symmetry. Compression ring type permanent magnets are tightly overlapped between the upper axial stator body and the lower axial stator body. The stators and the rotor are each of a cone spherical surface structure. Air gap magnetic fields are distributed more evenly. Multi-dimensional motion is facilitated. The gyroscopic effect can be effectively inhibited.

Description

technical field [0001] The invention relates to a non-mechanical contact magnetic suspension bearing, in particular to an AC / DC five-degree-of-freedom hybrid magnetic bearing used for vehicle-mounted flywheel battery support. Background technique [0002] Electric vehicles have the advantages of high efficiency, energy saving, low noise, and zero emissions. Their large-scale application helps to solve the current problems of environmental pollution and resource shortage. At present, the main problem restricting the development of electric vehicles is the performance of vehicle power batteries. The vehicle flywheel battery uses the magnetic suspension support and the flywheel's rotational inertia to realize energy storage. It has high charging efficiency, high specific energy, high specific power, small mass, no pollution and long life. The magnetic hybrid magnetic bearing is used as the support of the flywheel rotor to realize the suspension control of five degrees of freed...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing magnetic suspension bearing support structure cannot avoid the gyro effect produced by the vehicle-mounted flywheel battery, and propose a new type with simple structure, high integration, small volume, strong anti-interference ability, and capable of avoiding the gyro effect. AC-DC five-degree-of-freedom cone-spherical hybrid magnetic bearing for vehicle flywheel battery

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