Five-degree-of-freedom hybrid excitation bearingless switched reluctance motor

Abstract

The invention relates to a five-degree-of-freedom hybrid excitation bearingless switched reluctance motor which is composed of a 12 / 14 bearingless switched reluctance motor, a first permanent magnet, a radial bearing, a second permanent magnet, an axial bearing and a rotating shaft. The permanent magnets provides a bias magnetic field required for generating suspension force for the 12 / 14 bearingless switched reluctance motor, the radial bearing and the axial bearing through the effect of a magnetic conductive plate so that excessive coils used for generating bias magnetic axis can be omitted, the loss is low and the system structure is compact; and the coupling problem between the torque winding and the suspension force winding of the bearingless switched reluctance motor can be solved so that decoupling control of the torque and the suspension force can be realized on the motor body, and stable suspension of the bearingless switched reluctance motor rotor can be facilitated by the characteristic that the suspension force is not influenced by the rotor position angle.

Description

technical field [0001] The invention relates to a five-degree-of-freedom mixed 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. For this reason, this patent proposes a five-degree-of-freedom hybrid exci...

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Problems solved by technology

[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 and high-efficiency motors

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