Dual-stator hybrid excitation magnetic suspension switched reluctance machine

Abstract

The invention discloses a dual-stator hybrid excitation magnetic suspension switched reluctance machine. The dual-stator hybrid excitation magnetic suspension switched reluctance machine comprises a 24-pole inner stator, a 16-pole rotor and an 8-pole hybrid outer stator, wherein the inner stator, the rotor and the hybrid outer stator are sequentially and coaxially sleeved from inside to outside, the hybrid outer stator comprises eight symmetrically-distributed salient poles and four sheet-shaped permanent magnets, the radial widths of the permanent magnets are equal to the widths of tooth poles of the outer stator, the permanent magnets employ a radial magnetizing mode, the permanent magnets and a suspension winding on the outer stator jointly act to generate a suspension force, a three-phase 24 / 16 outer rotor SRM structure is arranged in the motor, and the dual-stator hybrid excitation magnetic suspension switched reluctance machine has the advantage of conventional SRM, is relativelysmall in stepping angle, relatively small in torque ripple and relatively high in control accuracy; windings on tooth poles of the inner stator are used for providing torque are independent to a suspension magnetic field, and the problem of coupling between the torque and the suspension is solved; and meanwhile, the axial length is relatively small, the permanent magnets are used for providing bias magnetic flux, so that the power consumption is relatively low, the motor running efficiency is improved, and the excitation mode of the torque winding is not unique.

Description

technical field [0001] The invention relates to a double-stator hybrid excitation magnetic levitation switched reluctance motor, which can be used as a high-speed and high-efficiency motor, and is especially suitable for the field of flywheel batteries. Background technique [0002] With the continuous rapid development of my country's economy, high-speed / ultra-high-speed motors are required in many fields such as high-speed machine tools, centrifuges, compressors, and flywheel batteries. The frictional resistance increases, the bearings wear seriously, and regular maintenance is required, and because a large amount of heat is generated during the friction process, the motor's working efficiency is low, so high-speed, high-efficiency motors are getting more and more attention, but reliability, high loss and other issues are constrained With the development of high-speed, high-efficiency motors. There is a strong coupling between the torque winding and the suspension winding o...

AI Technical Summary

Problems solved by technology

It can cooperate with the external control magnetic circuit to solve the coupling problem between the torque and the levitation and between the two radial degrees of freedom. At the same time, the axial length is small, and the permanent magnet provides the bias flux so that the power consumption is low, and Simple structure, flexible control

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