Single-stator excited disc type full-degree-of-freedom bearingless motor and control method thereof

Abstract

The invention discloses a single-stator excited disc type full-degree-of-freedom bearingless motor and a control method thereof, and belongs to the field of motor design and control. According to theinvention, active control over all degrees of freedom of a rotor can be achieved only by means of the stator and the rotor of the motor and a corresponding control method, so that all degrees of freedom have large damping, the disturbance resistance of the full-degree-of-freedom bearingless motor system is improved, and then the stability of the bearingless motor system is enhanced; a passive magnetic bearing structure is not needed, so that compared with a current conventional bearingless motor, the motor system of the invention is more compact in structure, and can achieve very high power density and torque density; and the full-degree-of-freedom bearingless motor provided by the invention is not greatly different from a traditional disc type motor in structure, so that a mature machining process of the existing disc type motor can be directly referred to, the machinability is good, and large-scale popularization is facilitated.

Description

Technical field[0001]The invention belongs to the field of motor design and control, and more specifically, relates to a single-stator-excited disk-type full-degree-of-freedom bearingless motor and a control method thereof.Background technique[0002]The bearingless motor integrates the magnetic bearing into the motor module, relying on electromagnetic force to realize the stable suspension of the motor rotor, without mechanical bearings for support. Therefore, bearingless motors do not have the problems of large rotor friction loss at high speed, serious heating, and limited service life, and solve the problems of difficult selection of mechanical bearing lubricants in high vacuum fields such as aerospace, because there is no mechanical bearing lubricant leakage , Metal debris pollution, very suitable for high cleanliness areas.[0003]In addition to the rotational speed of the motor rotor, the degree of freedom around the rotation axis needs to be actively controlled, in the bearingle...

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Problems solved by technology

[0009] Aiming at the above defects or improvement needs of the prior art, the present invention provides a single-stator excited disk-type full-degree-of-freedom bearingless motor and its control method. Poor anti-disturbance ability and complex mechanical structure technical problems

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