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Double-stator excitation full-degree-of-freedom bearingless motor and active control method thereof

A bearingless motor and active control technology, which is applied in the direction of winding excitation motor control, current controller, synchronous motor with stationary armature and rotating magnet, etc., can solve the problem of complex mechanical structure and anti-disturbance of bearingless motor system Poor ability and other problems, to achieve good machinability, improve poor anti-disturbance ability, and improve poor stability

Active Publication Date: 2021-03-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects and improvement needs of the prior art, the present invention provides a dual-stator excitation full-degree-of-freedom bearingless motor and its active control method. technical problem

Method used

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  • Double-stator excitation full-degree-of-freedom bearingless motor and active control method thereof
  • Double-stator excitation full-degree-of-freedom bearingless motor and active control method thereof
  • Double-stator excitation full-degree-of-freedom bearingless motor and active control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A double-stator excitation full-degree-of-freedom bearingless motor, such as figure 1 As shown, it includes: a rotating shaft 8, and two stators and a rotor disk arranged along the rotating shaft 8, and the rotor disk is located between the two stators;

[0046] The rotor disk includes a rotor core 4, and permanent magnet modules 3 and 5 that are surface-attached to the rotor core; Magnetic field; in this embodiment, the number of pole pairs of the rotor permanent magnetic field produced by the permanent magnet module is 7;

[0047] The stator includes stator cores 1, 7, and stator windings 2, 6 arranged on the stator cores 1, 7; in this embodiment, each stator core has 18 teeth, and the teeth of the two stator cores are aligned with each other. The stator winding is a suspension and torque integrated winding structure;

[0048] When working, the first armature magnetic field and the second armature magnetic field are generated after the stator windings 2 and 6 are fe...

Embodiment 2

[0059] A double-stator excitation full-degree-of-freedom bearingless motor. This embodiment is similar to the above-mentioned embodiment 1. The difference is that in this embodiment, the stator winding is a suspension winding and the torque winding is separated. Specifically, the stator winding includes mutual Independent suspension winding and torque winding, the first armature magnetic field is generated after the current is passed into the suspension winding, and the second armature magnetic field is generated after the current is passed into the torque winding;

[0060] When the suspension windings of the two stators are fed with the same-phase direct-axis suspension current, the motor generates a suspension force along the radial x direction; The levitation force; when the suspension windings of the two stators are fed with the anti-phase direct-axis suspension current, the motor will generate a restoring torque around the radial direction in the y direction; The return t...

Embodiment 3

[0063] The active control method of the double-stator excitation full-degree-of-freedom bearingless motor provided in the above-mentioned embodiment 1 includes:

[0064] Active control of the four degrees of freedom of the rotor disk, namely two degrees of freedom in radial translation and two degrees of freedom in radial rotation, is achieved by controlling the magnitude and phase relationship of the suspension current components on the two stators in the mid-point and direct axis currents;

[0065] By controlling the torque current components of the two stators, the magnitude and phase relationship of the mid-phase and direct-axis currents, the active control of the two rotor degrees of freedom, the axial translational degree of freedom and the axial rotational degree of freedom of the rotor disk, is realized.

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Abstract

The invention discloses a double-stator excitation full-degree-of-freedom bearingless motor and an active control method thereof and belongs to the field of motor design and control. The two stators are arranged along the rotating shaft; each stator comprises a stator iron core and a stator winding arranged on the stator iron core; the stator winding is of a suspension winding and torque winding separation structure or a suspension and torque integrated winding structure; the rotor disc is located between the two stators and comprises a rotor iron core and a permanent magnet module which is attached to the rotor iron core in a surface-mounted mode, and the permanent magnet module generates a rotor permanent magnetic field; during working, the stator winding generates a first armature magnetic field and a second armature magnetic field; the difference between the first armature magnetic field and the rotor permanent magnetic field is a pair of poles for realizing radial four-degree-of-freedom active control; and the second armature magnetic field and the rotor permanent magnet magnetic field have the same number of pole pairs and are used for realizing axial two-degree-of-freedom active control. According to the motor, full-degree-of-freedom active control of the bearingless motor can be realized, system stability is improved, and the system structure is simplified.

Description

technical field [0001] The invention belongs to the field of motor design and control, and more specifically relates to a double-stator excitation full-degree-of-freedom bearingless motor and an active control method thereof. Background technique [0002] Bearingless motors integrate magnetic bearings into the motor module, and rely on electromagnetic force to achieve stable suspension of the motor rotor without mechanical bearings for support. Therefore, the bearingless motor does not have the problems of large friction loss at high speed of the rotor, serious heat generation, limited life, etc., and solves the problems of difficult selection of mechanical bearing lubricating oil in aerospace and other high vacuum fields, because there is no leakage of mechanical bearing lubricating oil , Metal debris pollution, very suitable for high cleanliness areas. [0003] In addition to the rotational speed of the motor rotor, which is the degree of freedom around the rotation axis,...

Claims

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Application Information

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IPC IPC(8): H02K16/04H02K21/24H02K1/27H02K3/04H02K11/21H02P6/28H02P6/32
CPCH02K16/04H02K21/24H02K1/2793H02K3/04H02K11/21H02P6/28H02P6/32
Inventor 裴同豪李大伟刘嘉韵孔武斌曲荣海孙剑波
Owner HUAZHONG UNIV OF SCI & TECH
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