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Radial flux doubly salient permanent magnet motor integrated with radial magnetic bearing

A permanent magnet motor and radial flux technology, applied in the field of electric motors, can solve the problems of reduced power consumption, low stiffness and damping, lack of active control ability of magnetic bearings, etc., and achieve the effect of eliminating friction loss

Pending Publication Date: 2020-03-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic field of passive magnetic suspension bearings is uncontrollable. Because there is no control current, the power consumption is reduced and the volume is also small. However, this type of magnetic bearing lacks active control capabilities and has relatively low stiffness and damping. It is generally only used in one direction. Support objects or relieve loads on conventional bearings

Method used

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  • Radial flux doubly salient permanent magnet motor integrated with radial magnetic bearing
  • Radial flux doubly salient permanent magnet motor integrated with radial magnetic bearing
  • Radial flux doubly salient permanent magnet motor integrated with radial magnetic bearing

Examples

Experimental program
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Effect test

Embodiment 1

[0038] refer to figure 1 , provides a schematic diagram of the overall structure of a radial flux doubly salient permanent magnet motor integrated with a radial magnetic bearing, as shown in figure 1 , a radial flux doubly salient pole permanent magnet motor integrated with a radial magnetic bearing includes a rotating assembly 100, including a rotating member 101 and a stator body 102 arranged on the periphery of the rotating member 101; a suspension assembly 200, arranged on the rotating member 101 and the permanent magnet 300 is located between the suspension assembly 200 and the stator body 102 .

[0039]Specifically, the main structure of the present invention includes a rotating assembly 100, a suspension assembly 200, and a permanent magnet 300. Through the mutual cooperation between the rotating assembly 100 and the suspension assembly 200, the radial suspension force can be used to keep the rotating shaft in a non-contact state, eliminating the The friction loss caus...

Embodiment 2

[0042] refer to figure 2 , this embodiment is different from the first embodiment in that: the levitation assembly 200 includes a magnetic bearing stator yoke 201, a magnetic bearing stator salient pole 202, a magnetic bearing control winding 203 and a magnetic bearing rotor 204, a magnetic bearing stator yoke 201, The magnetic bearing stator salient pole 202, the magnetic bearing control winding 203 and the magnetic bearing rotor 204 can respectively provide a bias magnetic field and a control magnetic field, and produce a controllable radial levitation force when the control magnetic field interacts with the excitation magnetic field. Due to the friction loss caused by mechanical contact during rotation, stable suspension in two degrees of freedom in the radial direction is realized. Specifically, the magnetic bearing stator yoke 201 of the suspension assembly 200 is disposed on one side of the permanent magnet 300 , wherein the magnetic bearing stator salient pole 202 of t...

Embodiment 3

[0047] refer to figure 2 , this embodiment is different from the above embodiments in that: the rotating member 101 also includes a motor rotor salient pole 101b and a motor rotor yoke 101c, and the set rotating shaft 101a, the motor rotor salient pole 101b and the motor rotor yoke 101c constitute the rotor of the motor , so that it can provide power for each machine. Specifically, the rotating member 101 also includes a motor rotor salient pole 101b and a motor rotor yoke 101c, the motor rotor salient pole 101b is arranged on the motor rotor yoke 101c, and the motor rotor yoke 101c is arranged outside the rotating shaft 101a; wherein, the magnetic bearing The rotor 204 is arranged on the rotating shaft 101a. It should be noted that the motor rotor yoke 101c is cylindrical, and the cylindrical motor rotor yoke 101c is sleeved on the rotating shaft 101a and rotates synchronously with the rotating shaft 101a. The surface protrudes outward along the direction perpendicular to t...

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Abstract

The invention discloses a radial flux doubly salient permanent magnet motor integrated with a radial magnetic bearing, and the motor comprises a rotating assembly which comprises a rotating part and astator body disposed at the periphery of the rotating part; a suspension assembly which is arranged on the outer side of the rotating shaft of the rotating part; an permanent magnet which is positioned between the suspension assembly and the stator body; a magnetic bearing stator magnet yoke of the suspension assembly is arranged on one side of the permanent magnet; a magnetic bearing stator salient pole of the suspension assembly is arranged on the inner wall of the magnetic bearing stator magnet yoke. According to the invention, a bias magnetic field is generated by a permanent magnet; an electromagnet is adopted to provide a control magnetic field, the control magnetic field and an excitation magnetic field interact with each other to generate controllable radial suspension force, theradial suspension force is utilized to enable the rotating shaft to be in a non-contact state, friction loss caused by mechanical contact when the rotating shaft rotates is eliminated, and stable suspension in two radial freedom degrees is achieved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a radial flux double salient pole permanent magnet motor integrated with a radial magnetic bearing. Background technique [0002] It is an ancient dream of human beings to use magnetic force to keep objects in a non-contact levitation state. In 1842, Professor S. Earnshaw of the University of Cambridge in the United Kingdom proved theoretically that permanent magnets alone cannot keep objects suspended in six degrees of freedom in space. In order to enable the force obtained by the ferromagnet to be used for stable free suspension, the magnetic field must be continuously adjusted according to the suspension state of the object, that is, a controllable electromagnet is used. In 1937, German Kemper successfully realized the stable levitation of an object with a mass of 210Kg using a controllable electromagnet, and obtained a patent for magnetic levitation technology. This experime...

Claims

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Application Information

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IPC IPC(8): H02K7/09
CPCH02K7/09
Inventor 张广明王恒强梅磊欧阳慧珉
Owner NANJING UNIV OF TECH
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