CN102163942A - Magnetic suspension motor and pump - Google Patents

Magnetic suspension motor and pump Download PDF

Info

Publication number
CN102163942A
CN102163942A CN2011101018297A CN201110101829A CN102163942A CN 102163942 A CN102163942 A CN 102163942A CN 2011101018297 A CN2011101018297 A CN 2011101018297A CN 201110101829 A CN201110101829 A CN 201110101829A CN 102163942 A CN102163942 A CN 102163942A
Authority
CN
China
Prior art keywords
rotor
magnetic
mentioned
permanent magnet
magnetic bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2011101018297A
Other languages
Chinese (zh)
Other versions
CN102163942B (en
Inventor
小沼弘幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwaki Co Ltd
Original Assignee
Iwaki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Iwaki Co Ltd filed Critical Iwaki Co Ltd
Priority to CN201110101829.7A priority Critical patent/CN102163942B/en
Publication of CN102163942A publication Critical patent/CN102163942A/en
Application granted granted Critical
Publication of CN102163942B publication Critical patent/CN102163942B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
    • F16C32/0465—Details of the magnetic circuit of stationary parts of the magnetic circuit with permanent magnets provided in the magnetic circuit of the electromagnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/0487—Active magnetic bearings for rotary movement with active support of four degrees of freedom
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/048—Active magnetic bearings for rotary movement with active support of two degrees of freedom, e.g. radial magnetic bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The invention provides a magnetic suspension motor and a pump. A motor part is arranged between two magnetic bearing parts of a stator, so that magnetic bearing magnet yokes of the magnetic bearing parts are circumferentially and equidistantly arranged on the side of a rotor in a way of setting a preset interval; the magnetic bearing magnet yoke is provided with two salient poles which are opposite to the side of the rotor; a coil for the magnetic bearing is wound on one of the salient poles; a first permanent magnet is arranged on the other salient pole; a second permanent magnet is arranged between the salient pole on the side of the motor part and a motor magnet yoke of the motor part; all salient poles, which are arranged on the side of the motor part, of one of the magnetic bearing parts are the salient poles which are wound with coils for the magnetic bearing or the salient poles which are provided with the first permanent magnets; and all salient poles, which are arranged on the side of the motor part, of the other magnetic bearing part are the salient poles which are wound with coils for the magnetic bearing or the salient poles which are provided with the first permanent magnets.

Description

Magnetic levitaion motor and pump
The application is to be on October 18th, 2007, denomination of invention to be the dividing an application of Chinese invention patent application of 2007800168852 (PCT/JP2007/001138) for " magnetic levitaion motor and pump ", application number the applying date.
Technical field
The present invention relates to a kind of manufacturing and control of magnetic levitaion motor, particularly relate to the technology of the mixed type magnetic levitaion motor of double offset permanent magnet type.
Background technology
In recent years, as magnetic levitaion motor, the mixed type magnetic levitaion motor of double offset permanent magnet type has been proposed.
It is such device that the 5DOF formula of patent documentation 1 is mixed magnetic bearing: adopt the biasing magnetic flux that permanent magnet takes place use, make the major axis rotor that is used to form impeller of pump etc. with 5DOF magnetic suspension efficiently and rotate.Magnetic circuit to the biasing magnetic flux improves and just can produce the magnetic suspension force higher than the magnetic suspension system that only adopts electromagnet.
According to patent documentation 2, double offset formula magnetic bearing (supporting control) just can further produce magnetic suspension force by the lift magnet of preparing a plurality of mixed type magnetic bearings in the past.In addition, with the magnetic flux flow of elementary biasing permanent magnet inductive secondary biasing permanent magnet, to realize more powerful mixed type magnetic bearing.
But, be used for when technology under the situation of pump patent documentation 1, owing to be useful on the salient pole of control axial location at the two ends of rotor mask, so the entrance and exit structure of pump becomes complicated, thereby is not easy assembling.And, because the stream of liquid becomes complicated, become big problem so have suction and discharge loss.
In addition, according to patent documentation 2, owing to be that the alternating polarity that will be configured in the salient pole on the circumferencial direction of magnetic bearing is transformed to the structure of NSNS, so there is generation vortex flow when rotor rotate, thus the big problem of the spin loss of rotor change.
Patent documentation 1: TOHKEMY 2006-14528 communique.
Patent documentation 2: TOHKEMY 2007-120635 communique.
Summary of the invention
The present invention finishes in view of above-mentioned situation, and it is a kind of simple in structure and can be suppressed at magnetic bearing portion and produce vortex flow with the magnetic levitaion motor of the spin loss that reduces rotor with used the pump of this magnetic levitaion motor that its purpose is to provide.
The present invention is a kind of magnetic levitaion motor, and this magnetic levitaion motor has stator that is made of magnetic bearing portion and motor part and the rotor that is arranged in the said stator.
Said stator is pressed from both sides between above-mentioned two magnetic bearing portions and is established above-mentioned motor part.Constitute the magnetic bearing yoke of above-mentioned magnetic bearing portion, be circle-shaped configuration equally spacedly in the mode that predetermined space is set in the side of above-mentioned rotor.Above-mentioned magnetic bearing yoke has two salient poles relative with the side of above-mentioned rotor, coiling magnetic bearing coil on an above-mentioned salient pole, on above-mentioned another salient pole, first permanent magnet is set, between the motor yoke of the above-mentioned salient pole of being located at above-mentioned motor part side and above-mentioned motor part, second permanent magnet is set.All above-mentioned salient poles that are located at above-mentioned motor part side of an above-mentioned magnetic bearing portion are to be wound with the salient pole of above-mentioned magnetic bearing with coil, or are provided with the salient pole of above-mentioned first permanent magnet.
All above-mentioned salient poles that are located at above-mentioned motor part side of above-mentioned another magnetic bearing portion are to be wound with the salient pole of above-mentioned magnetic bearing with coil, or are provided with the salient pole of above-mentioned first permanent magnet.
The magnetic pole of above-mentioned first permanent magnet on the above-mentioned salient pole that is oppositely arranged with above-mentioned rotor of an above-mentioned magnetic bearing portion, identical in above-mentioned rotor-side, the magnetic pole of above-mentioned first permanent magnet of the above-mentioned salient pole that is oppositely arranged with above-mentioned rotor of above-mentioned another magnetic bearing portion that is provided with across above-mentioned motor part, opposite in above-mentioned rotor-side with the magnetic pole of the above-mentioned rotor-side of above-mentioned first permanent magnet of an above-mentioned magnetic bearing portion, the magnetic pole of the above-mentioned motor part side of above-mentioned second permanent magnet is identical with the magnetic pole of above-mentioned rotor-side of above-mentioned first permanent magnet on being arranged on above-mentioned identical magnetic bearing yoke.
Perhaps, the magnetic pole of above-mentioned first permanent magnet of the above-mentioned salient pole that is oppositely arranged with above-mentioned rotor of an above-mentioned magnetic bearing portion is identical in above-mentioned rotor-side.The magnetic pole of above-mentioned first permanent magnet of the above-mentioned salient pole that is oppositely arranged with above-mentioned rotor of above-mentioned another magnetic bearing portion that is provided with across above-mentioned motor part is identical with the magnetic pole of the above-mentioned rotor-side of above-mentioned first permanent magnet of an above-mentioned magnetic bearing portion in above-mentioned rotor-side.The magnetic pole of the above-mentioned motor part side of above-mentioned second permanent magnet is identical with the magnetic pole of above-mentioned rotor-side of above-mentioned first permanent magnet on being arranged on above-mentioned identical magnetic bearing yoke.
By above-mentioned formation, though be simple structure, can be suppressed at the vortex flow that magnetic bearing portion produces, thereby can reduce the rotational loss of rotor.
Preferably, above-mentioned motor part has motor yoke salient pole, this motor yoke salient pole radially outstanding from above-mentioned motor yoke along above-mentioned rotor and and above-mentioned rotor between be provided with predetermined space, coiling motor coil on above-mentioned motor yoke salient pole.On the surface of above-mentioned rotor the motor permanent magnet is set.
In addition, at the transducer that above-mentioned magnetic bearing portion is provided for detecting the position of above-mentioned rotor, supply with Control current to above-mentioned magnetic bearing with coil according to the measured value of the sensor.
Preferably, a kind of magnetic levitaion motor, this magnetic levitaion motor has stator that is made of magnetic bearing portion and motor part and the rotor that is arranged in the said stator, said stator is pressed from both sides between above-mentioned two magnetic bearing portions and is established above-mentioned motor part, constitute the magnetic bearing yoke of above-mentioned magnetic bearing portion, side at above-mentioned rotor is circle-shaped configuration equally spacedly in the mode that predetermined space is set, above-mentioned magnetic bearing yoke has two salient poles relative with the side of above-mentioned rotor, on above-mentioned two salient poles, first permanent magnet is set all, between the motor yoke of the above-mentioned salient pole of being located at above-mentioned motor part side and above-mentioned motor part, second permanent magnet is set, on all above-mentioned salient poles of the above-mentioned motor part side of being located at of an above-mentioned magnetic bearing portion, be wound with above-mentioned magnetic bearing coil, on all above-mentioned salient poles of the above-mentioned motor part side of being located at of above-mentioned another magnetic bearing portion, be wound with above-mentioned magnetic bearing coil.
In addition, above-mentioned magnetic levitaion motor can be used for pump.
Description of drawings
Fig. 1 shows the stereogram of the structure of embodiment 1.
Fig. 2 shows the first permanent magnet 8 (magnetic pole that is positioned at rotor 2 sides of 8a～8d) and the first permanent magnet 8 (three-dimensional cutaway view of the magnetic line of force direction that is produced under the opposite situation of the magnetic pole that is positioned at rotor 2 sides of 8e～8h).
Fig. 3 shows towards the first permanent magnet 8 (magnetic pole of the rotor 2 of 8a～8d) and the first permanent magnet 8 (three-dimensional cutaway view of the magnetic line of force direction that is produced under the identical situation of the magnetic pole of rotor 2 sides of 8e～8h).
Fig. 4 is that the structure of rotor is the stereogram of the X-Y plane section under the situation of surface magnet type.
Fig. 5 is that the structure of rotor is to dissect the stereogram of the section that forms with X-Y plane, Z-X plane under the situation of alternate type.
Fig. 6 is the figure of the variation of embodiment 1.
Fig. 7 is the figure of the variation of embodiment 1.
Fig. 8 shows the block diagram of the control part of magnetic bearing portion.
Fig. 9 is the figure of profile of the pump of the expression magnetic levitaion motor that used embodiment 1.
Embodiment
(principle explanation)
Magnetic levitaion motor of the present invention is made of stator and rotor cylindric or cylindraceous, and said stator is made of the magnetic bearing portion of the side that is configured in rotor (inner surface or outer surface) and motor part, and magnetic bearing and motor become one.
Magnetic bearing portion constitutes salient pole and equally spaced is configured to circle-shaped towards the electromagnet of rotor side surface.
Electromagnet is by the salient pole with permanent magnet (first permanent magnet) (second salient pole) and be wound with salient pole (first salient pole) formation of magnetic bearing with coil.
Motor part constitutes by having towards the motor yoke of the salient pole of rotor side surface and the electromagnet of the motor winding of having reeled on these salient poles.Configuration second permanent magnet between the electromagnet of the electromagnet of magnetic bearing portion and motor part.
Here, first salient pole of magnetic bearing portion and second salient pole be configuration side by side in the axial direction, be configured to the magnetic pole (the N utmost point, the S utmost point) of first permanent magnet of first salient pole of circle-shaped magnetic bearing portion, adopt identical magnetic pole (the N utmost point or the S utmost point) is disposed towards the mode of rotor.Second permanent magnet between magnetic bearing portion and the motor part adopts the magnetic pole identical with the magnetic pole towards rotor of first permanent magnet is provided with towards the mode of motor part.
Thus, can become double offset structure from more biasing magnetic flux to magnetic bearing portion that supply with, thereby can realize miniaturization, high efficiency, but also can realize the reduction of vortex flow loss because the magnetic pole of the salient pole of magnetic bearing portion is identical in a circumferential direction.
In addition, the suction that the biasing magnetic flux by the permanent magnet on the salient pole radially that is positioned at rotor produces suppresses rotor change in the axial direction, and rotor is limited to the precalculated position.That is, by realizing the simplification controlled axially being in stable (passive stabilization) passively.
Embodiments of the present invention are described below with reference to the accompanying drawings.
(embodiment 1)
Fig. 1 shows the figure of the structure of embodiments of the invention 1.The magnetic levitaion motor of embodiment 1 is made of stator 1 and rotor 2.
Stator 1 is made of magnetic bearing portion and motor part.In addition, convenient for the purpose of, the label " 1 " of stator is labeled on the magnetic bearing yoke 3d described later.
Magnetic bearing portion is configured in the mode that the two ends (5a, 5b) in the side (curved surface) of the rotor 2 of cylinder-like structure have predetermined space.
Magnetic bearing portion has each magnetic bearing yoke 3 (3a～3h.) in this example, magnetic bearing yoke 3a and 3e are provided with across motor yoke 4, similarly, magnetic bearing yoke 3b and 3f, magnetic bearing yoke 3c and 3g, magnetic bearing yoke 3d and 3h are provided with across motor yoke 4.
(have first salient pole 6 (6a～6h), and first salient pole 6 (6a～on the 3a～3h) in each magnetic bearing yoke 3 6h) towards the circle-shaped equally spaced configuration of radially being of rotor 2 sides.In addition, (magnetic bearing of reeling on the 3a～3h) is with coil 11 (11a～11h) in each magnetic bearing yoke 3.In addition, though be preferably that (6a～6h) goes up the coiling magnetic bearing with coil 11 (11a～11h), be not limited thereto at first salient pole 6.
And then, (have second salient pole 7 (7a～7h) on the 3a～3h) in each magnetic bearing yoke 3.(7a～7h) is towards the circle-shaped equally spaced configuration of radially being of rotor 2 sides, has first permanent magnet 8 (8a～8h) on second salient pole 7 for second salient pole 7.Here, each second salient pole 7 is provided with accordingly with each first salient pole 6.Preferred second salient pole 7 and first salient pole 6 are provided with abreast.
In addition, (be between the motor yoke 4 of second salient pole 7 (7a～7h)) and motor part in Fig. 1, dispose second permanent magnet 9 (9a～9h) at the salient pole of the motor part side of each magnetic bearing yoke 3.
((8a～8d) adopts identical magnetic pole is disposed towards the mode of rotor 2 first permanent magnet 8 of 7a～7d) second salient pole 7.In addition, ((8e～8h) adopts identical magnetic pole is disposed towards the mode of rotor 2 first permanent magnet 8 of 7e～7h) second salient pole 7.((magnetic pole towards rotor 2 of 8e～8h) also can be different for 8a～8d) and first permanent magnet 8 for first permanent magnet 8.
(9a～9h) employing makes the magnetic pole opposite with the magnetic pole towards rotor of first permanent magnet 8 dispose towards the mode of motor yoke 4 to second permanent magnet 9.At this moment, (9a～9d) adopts identical magnetic pole is disposed towards the mode of motor yoke 4 second permanent magnet 9.In addition, (9e～9h) adopts identical magnetic pole is disposed towards the mode of motor yoke 4 second permanent magnet 9.Second permanent magnet 9 (9a～9d) and second permanent magnet 9 (the magnetic pole of 9e～9h) towards motor yoke 4, according to first permanent magnet 8 towards the direction of the magnetic pole of rotor and might be different.
In motor part, the mode that has predetermined space with the central portion 5c in the side of rotor 2 disposes motor yoke 4.On the motor yoke 4 of motor part, have salient pole, on motor yoke 4 and these salient poles, be wound with motor coil 12 towards the central portion 5c of rotor 2 sides.In addition, dispose the motor permanent magnet 10 relative at the central portion 5c of rotor 2 with the salient pole of motor part.In addition, in motor part, also can be at the side of motor yoke 4 cylindraceous configuration motor with coil 12, to drive by long-range navigation thatch power.
Second salient pole 7 is configured in motor yoke 4 sides, first salient pole 6 is configured in the bottom surface side (end side) of rotor 2, but they also can puts upside down configuration.
Here, first permanent magnet 8, second permanent magnet 9, the motor of above-mentioned explanation for example use neodymium-iron-boron, samarium-cobalt, samarium-iron-strong magnetic materials such as nitrogen with the material of permanent magnet 10.The material of the rotor yoke 5 of the magnetic bearing yoke 3 of stator 1 and motor yoke 4, rotor 2 is for example used soft magnetic materials such as magnetic soft iron, magnetic stainless steel, compressed-core, silicon steel plate.In addition, be not limited to the material of above-mentioned explanation.
As the shape that realizes the foregoing description, according to the magnetic pole of first permanent magnet 8 and second permanent magnet 9 towards considering following structure.
(magnetic bearing configuration example 1)
As configuration example 1, Fig. 2 shows first permanent magnet 8, and (8a～8d) is positioned at the magnetic pole of rotor 2 sides and first permanent magnet 8, and (8e～8h) is positioned at the structure under the opposite situation of the magnetic pole of rotor 2 sides, and the three-dimensional cutaway view that shows the magnetic line of force direction of seeing from A-A ' that is produced by this structure.
In addition, second salient pole 7 is configured in motor yoke 4 sides, first salient pole 6 is configured in the both end sides of rotor 2, but, also can is that first salient pole 6 is configured in motor yoke 4 sides, second salient pole 7 is configured in the both end sides of rotor 2 as structure.
As shown in Figure 2, the biasing magnetic flux 20 of first permanent magnet 8 forms the magnetic circuit of " the first permanent magnet 8-, the second salient pole 7-rotor yoke 5-, the first salient pole 6-".The biasing magnetic flux 19 of second permanent magnet 9 forms the magnetic circuit of " the second permanent magnet 9-motor yoke 4-, the second permanent magnet 9-, the first salient pole 6-rotor yoke 5-, the first salient pole 6-".Magnetic bearing forms the magnetic circuit of " the magnetic bearing coil 11-first salient pole 6-rotor yoke 5-second salient pole 7-" with the control magnetic flux 21 of coil 11.
The biasing magnetic flux 19 of the biasing magnetic flux 20 of first permanent magnet 8 and second permanent magnet 9 is with in the equidirectional gap that repeatedly supplies to first salient pole 6 and rotor 2.The biasing magnetic flux reverse with the gap of second salient pole 7 and rotor 2 supplied in the gap of first salient pole 6 and rotor 2 by first permanent magnet 8.
About the control magnetic flux 21 that produces with coil 11 by magnetic bearing, when control magnetic flux 21 according to Control current when (positive current, negative current) flows through in the gap of the direction identical with separately biasing magnetic flux 19,20 at the gap of first salient pole 6 and rotor 2 and second salient pole 7 and rotor 2, magnetic flux density in each gap increases, and the magnetic attraction that acts on those salient pole directions of rotor 2 increases.
On the contrary, in the gap of first salient pole 6 and rotor 2 neutralizes the gap of second salient pole 7 and rotor 2, if control magnetic flux 21 flows through with the direction opposite with separately biasing magnetic flux 19,20, the magnetic flux density in each gap reduces, and the magnetic attraction that acts on those salient pole directions of rotor 2 reduces.
(measured value of 13a～13h) is controlled the increase of magnetic attraction/reduce, to carry out the Position Control of rotor 2 by adjusting Control current based on the position-detection sensor 13 of rotor 2.For example, when rotor 2 to Fig. 2-when directions X is subjected to displacement, the magnetic bearing of-X side with coil 11 (11d, 11h) in, Control current flows through along the direction that makes between first salient pole 6 (6d, 6h) and the rotor yoke 5 and the magnetic flux density in the gap between second salient pole 7 (7d, 7h) and the rotor yoke 5 reduces, the magnetic bearing of+X side with coil 11 (11b, 11f) in, Control current is along making between first salient pole 6 (6b, 6f) and the rotor yoke 5 and the direction of the increase of the magnetic flux density in the gap between second salient pole 7 (7b, 7f) and the rotor yoke 5 flows through.Consequently, based on the magnetic attraction of each first salient pole 6 and second salient pole 7 on rotor 2 be+directions X with joint efforts, thereby rotor 2 is moved to+directions X.
In addition, in Fig. 2, when rotor 2 tilts counterclockwise, use in the coil 11 (11d, 11f) at electromagnet, Control current is along making between first salient pole 6 (6d, 6f) and the rotor and second salient pole 7 (7d, 7f) flows through with the direction that magnetic flux density in the gap between rotor reduces, electromagnet with coil 11 (11b, 11h) in, Control current is along making between first salient pole 6 (6b, 6h) and the rotor and second salient pole 7 (7b, 7h) flows through with the direction that magnetic flux density in the gap between rotor increases.Consequently, based on the magnetic attraction of each first salient pole 6 and second salient pole 7 make a concerted effort on rotor 2, produce clockwise torque, thereby can make the inclination playback of rotor 2.
Like this, (measured value of 13a～13h) is adjusted and is applied to direction and the size of each magnetic bearing with the Control current on coil 11, can control rotor 2 position and inclination diametrically thus according to the position-detection sensor 13 of rotor 2.
In addition, the biasing magnetic flux 19 of second permanent magnet 9 is by motor yoke 4, and the driving of rotor 2 can not interfered in the gap of do not flow through motor yoke 4 and rotor 2 therefore.
(magnetic bearing configuration example 2)
As configuration example 2, Fig. 3 shows first permanent magnet 8, and (8a～8d) is towards the magnetic pole of rotor 2 and first permanent magnet 8 (structure under the identical situation of the magnetic pole of rotor 2 sides of 8e～8h), and the three-dimensional cutaway view that shows the direction of the magnetic line of force of seeing from A-A ' that is produced by this structure.
In configuration example 2, first permanent magnet 8 is positioned at the magnetic pole of rotor 2 sides and magnetic pole that second permanent magnet 9 is positioned at motor yoke 4 sides is the N utmost point, but first permanent magnet 8 is positioned at the magnetic pole of rotor 2 sides and magnetic pole that second permanent magnet 9 is positioned at motor yoke 4 sides also can be the S utmost point.
In addition, second salient pole 7 is configured in motor yoke 4 sides, first salient pole 6 is configured in the both end sides of rotor 2, still, also first salient pole 6 can be configured in motor yoke 4 sides, second salient pole 7 is configured in the both end sides of rotor 2.
In Fig. 3, the biasing magnetic flux 20 of first permanent magnet 8 forms the magnetic circuit of " the first permanent magnet 8-, the second salient pole 7-rotor yoke 5-, the first salient pole 6-".The biasing magnetic flux 19 of second permanent magnet 9 forms the magnetic circuit of " the second permanent magnet 9-motor yoke 4-rotor yoke 5-, the first salient pole 6-".Form the magnetic circuit of " the magnetic bearing coil 11-first salient pole 6-rotor yoke 5-second salient pole 7-" with the control magnetic flux 21 that coil 11 produces by magnetic bearing.
The biasing magnetic flux 19 of the biasing magnetic flux 20 of first permanent magnet 8 and second permanent magnet 9 is with in the equidirectional gap that repeatedly supplies to first salient pole 6 and rotor 2.The biasing magnetic flux reverse with the gap of second salient pole 7 and rotor 2 supplied in the gap of first salient pole 6 and rotor 2 by first permanent magnet 8.
About the control magnetic flux 21 that produces with coil 11 by magnetic bearing, when control magnetic flux 21 according to Control current when (positive current, negative current) flows through in the gap of first salient pole 6 and rotor 2 neutralizes the gap of second salient pole 7 and rotor 2 with the direction identical with separately biasing magnetic flux, magnetic flux density in each gap increases, and the magnetic attraction that acts on those salient pole directions of rotor 2 increases.On the contrary, in the gap of first salient pole 6 and rotor 2 neutralizes the gap of second salient pole 7 and rotor 2, if control magnetic flux 21 flows through with the direction opposite with separately biasing magnetic flux 19,20, the magnetic flux density in each gap reduces, and the magnetic attraction that acts on those salient pole directions of rotor 2 reduces.
(measured value of 13a～13h) is controlled the increase of magnetic attraction/reduce, to carry out the Position Control of rotor 2 by adjusting Control current based on the position-detection sensor 13 of rotor 2.For example, when rotor 2 along Fig. 3-when directions X is subjected to displacement, at the magnetic bearing of-X side with coil 11 (11d, 11h), Control current is along making first salient pole, 6 (6d, 6h) and between the rotor 2 and second salient pole, 7 (7d, 7h) and the direction that increases of the magnetic flux density in the gap between the rotor 2 flow through, at the magnetic bearing of+X side with coil 11 (11b, 11f), Control current is along making first salient pole, 6 (6b, 6f) and between the rotor 2 and second salient pole, 7 (7b, 7f) and the direction that reduces of the magnetic flux density in the gap between the rotor 2 flow through, thus, based on the magnetic attraction of each first salient pole 6 and second salient pole 7 on rotor 2 be+directions X with joint efforts, thereby rotor 2 is moved to+directions X.
In addition, in Fig. 3, when rotor 2 tilts counterclockwise, use in the coil 11 (11d, 11f) at electromagnet, Control current is along making between first salient pole 6 (6d, 6f) and the rotor and second salient pole 7 (7d, 7f) flows through with the direction that magnetic flux density in the gap between rotor reduces, electromagnet with coil 11 (11b, 11h) in, Control current is along making between first salient pole 6 (6b, 6h) and the rotor and second salient pole 7 (7b, 7h) flows through with the direction that magnetic flux density in the gap between rotor increases.Consequently, based on the magnetic attraction of each first salient pole 6 and second salient pole 7 make a concerted effort on rotor 2, produce clockwise torque, thereby can make the inclination playback of rotor 2.
Like this, (measured value of 13a～13h) is adjusted the direction and the size that are applied to the Control current 21 on each first salient pole 6 and second salient pole 7, can control rotor 2 position and inclination diametrically thus according to the position-detection sensor 13 of rotor 2.
In addition, the biasing magnetic flux 19 of second permanent magnet 9 also supplies in the gap between motor yoke 4 and the rotor 2.Therefore, the design of motor part is to need the biasing magnetic flux of consideration second permanent magnet 9.
As the shape of the rotor 2 of magnetic bearing configuration example 1 and magnetic bearing configuration example 2, can consider to adopt motor with the surperficial permanent-magnet type of permanent magnet 10, built-in permanent magnet type, alternate type etc.In addition, not adopting motor, also can be the structure of stepping motor, cage motor etc. with under the situation of permanent magnet 10.
(configuration example 1 of rotor 2)
As the shape of the rotor 2 that has adopted permanent magnet, being described as follows when having adopted surperficial permanent-magnet type.
The structure that Fig. 4 shows rotor 2 is the stereogram of the X-Y plane section under the situation of surface magnet type.In Fig. 4, the with dashed lines arrow illustrates the magnetic circuit 22 of motor with permanent magnet 10.In addition, motor part and rotor shown in Figure 4 are structures illustrated in the magnetic bearing configuration example 1.
The biasing magnetic flux 19 that produces by second permanent magnet 9 of magnetic bearing configuration example 1, can not flow to rotor 2, so can not interfere motor driven and the motor part negative elastic force of realizing with permanent magnet 10 by motor (power that rotor 2 is attracted to motor part owing to the magnetic attraction of permanent magnet) diametrically from the salient pole of motor yoke 4.
In addition, the biasing magnetic flux 19 that produces by second permanent magnet 9 of magnetic bearing configuration example 2, flow to rotor 2 from the salient pole of motor yoke 4, so motor produces biasing with the magnetic flux distribution of permanent magnet 10, if the motor N utmost point of permanent magnet 10, the size that S is very identical, identical confining force, then the power of the negative elastic force of motor part is extremely different with the N utmost point, the S of permanent magnet 10 at motor.
(configuration example 2 of rotor 2)
The structure that Fig. 5 shows rotor 2 is to dissect the stereogram of the section that forms with X-Y plane, Z-X plane under the situation of alternate type.In Fig. 5, the with dashed lines arrow illustrates the magnetic circuit of motor with permanent magnet 10, and the magnetic circuit of second permanent magnet 9 is shown with single-point line arrow.In addition, the permanent magnet of magnetic bearing portion shown in Figure 5 is a structure illustrated in the magnetic bearing configuration example 2.
In alternate type, motor is configured on the rotor 2 towards the mode of motor yoke 4 with the N utmost point or the S utmost point with permanent magnet 10.A plurality of motor with permanent magnets 10 with identical magnetic pole towards motor yoke body 4.
In addition, not to dispose permanent magnet, but as shown in Figure 5 rotor yoke 5 is configured in the surface of rotor 2 in mode round rotor 2.In this example, motor is configured in the position that mechanical angle is 90 degree with magnet 10 in mode relative in 4 pole motors.
The magnetic flux 24 that comes out with permanent magnet 10 from motor is by returning the magnetic circuit of motor with permanent magnet 10 from motor yoke 4 through the rotor yoke 5 on the surface of rotor 2.Therefore, consequently, the rotor yoke 5 on rotor 2 surfaces becomes the opposite magnetic pole (being the S utmost point in this example) of the magnetic pole towards motor yoke 4 (being the N utmost point in this example) of using permanent magnet 10 with motor.
In the rotor 2 of alternate type, the magnetic flux density in the gap of motor yoke 4 and rotor 2 is higher slightly than the magnetic flux density in the gap of permanent magnet surfaces.Therefore, as magnetic bearing configuration example 2, dispose second permanent magnet 9.Make the magnetic pole towards motor yoke 4 of second permanent magnet 9, identical with the motor of the rotor 2 of alternate type with the magnetic pole towards motor yoke 4 of permanent magnet 10.Be towards the N utmost point in Fig. 5.
With compare with the magnetic circuit of permanent magnet 10 by motor, the magnetoimpedance of the magnetic circuit of the rotor yoke 5 by rotor 2 surfaces is lower, therefore, the biasing magnetic flux 22 that sends from second permanent magnet 9 flows to the rotor yoke 5 on rotor 2 surfaces from the salient pole of motor yoke 4.
By suitably designing second permanent magnet 9, can be by motor with the magnetic flux 24 of permanent magnet 10 and the biasing magnetic flux 22 of second permanent magnet 9, the magnetic flux density in the gap with the rotor yoke 5 on the surface of rotor 2 is equated.
Consequently, the negative elastic force equalization that makes progress of the footpath of motor part.In addition, the magnetic flux density in the gap of the rotor yoke 5 on the surface by making rotor 2 increases, the torque that can improve motor.
In addition, if be configured to the permanent magnet of magnetic bearing configuration example 1, then the biasing magnetic flux from second permanent magnet 9 does not flow to rotor 2 from the salient pole of motor yoke 4, and therefore, whether the negative elastic force of motor part has motor is different with intensity under the situation of permanent magnet 10.
(variation 1)
Fig. 6 shows the variation 1 of embodiment 1.Consider gap magnetic loop leaked magnetic flux in addition, by carrying out the raising that following shape change can realize the magnetic bearing performance from magnetic bearing portion and rotor 2.
Cut apart first permanent magnet 8, and with permanent magnet be configured in each first salient pole 6 (6a～6h) with rotor 2 facing surfaces and second salient pole 7 (7a～7h) with rotor 2 facing surfaces and the second salient pole 7 (root of 7a～7h).In Fig. 6, (be provided with first permanent magnet 8 (8i～8p) on the 6a～6h) at each first salient pole 6.In addition, (7a～7h) is provided with first permanent magnet 8 (8a～8h, 8q～8x) at each second salient pole 7.
In addition, can be configured in the interior any position of salient pole with being divided into the first a plurality of permanent magnets 8, but, the direction towards the magnetic pole of rotor 2 of the permanent magnet in the permanent magnet in first salient pole 6 and second salient pole 7 is opposite, and the direction towards the magnetic pole of rotor 2 of the permanent magnet in the identical salient pole is equidirectional.
In addition, preferably permanent magnet is set, but is not qualification the configuration of permanent magnet on the salient pole surface.
In addition, in this example, (8i～8x) is reset at the first salient pole 6 (6a～6h) and second salient pole 7 (7a～7h) with first permanent magnet 8 to cut apart first permanent magnet 8, but just ((((8q～8x) redesign also can improve magnetic suspension force to first permanent magnet 8 of 7a～7h) to first permanent magnet 8 of 6a～6h) for the 8i～8p) or second permanent magnet 7 with first salient pole 6.
Moreover, in variation 1, cut apart magnetic bearing with coil 11 and be wound on first salient pole 6 and second salient pole 7 on.In Fig. 6, (magnetic bearing of also reeling on the 7a～7h) is with coil 11 (11i～11p) at second salient pole 7.
(variation 2)
Fig. 7 shows the variation of embodiment 1.Remove motor yoke 4 and between electromagnet arranged side by side vertically, dispose second permanent magnet 9, form the double offset magnetic bearing thus.First permanent magnet 8 of the magnetic bearing portion at two ends (8a～8d) (magnetic pole towards rotor 2 of 8e～8h) is opposite towards the magnetic pole of rotor 2 and first permanent magnet 8, second permanent magnet 9 with the opposite magnetic pole of the magnetic pole towards rotor 2 of first permanent magnet 8 of each electromagnet, between the electromagnet (electromagnet is made of with coil 11 first salient pole 6, second salient pole 7, first permanent magnet 8 and magnetic bearing) of the magnetic bearing portion at two ends, be configured.Though do not have the function of motor, then have 1 identical functions with embodiment as the function of magnetic bearing.In addition, on the part of rotor 2, magnetic coupling device is set, thereby can rotates by the motor of outside.
(control part of magnetic bearing portion)
Fig. 8 shows the control part of the magnetic bearing portion of embodiment 1.The radial position of rotor 2 is by being arranged on the radially position-detection sensor 13 (13a～13h) detect in precalculated position.The magnetic bearing relative across rotor is wound on each salient pole and wiring with coil 11 with opposite direction, and is connected on the power amplifier.In embodiment 1, between the magnetic bearing of each magnetic bearing portion is with coil 11 uniformly-spaced to dispose eight position-detection sensors 13.The difference of the output of two relative position-detection sensors 13 of each position-detection sensor 13 is detected by arithmetic unit 81～84.
Output according to arithmetic unit 81～84, in controller 85, will utilize position-detection sensor 13 detected coordinate figures, the magnetic bearing that is transformed into magnetic bearing portion utilizes PID (ratio, integration and differential) control to wait again and calculates the current value that will be applied in the magnetic bearing usefulness coil 11 with the control coordinate of coil 11.Slave controller 85 will impose on magnetic bearing and give power amplifier 86～89 with the current value instruction of coil 11, then apply electric current by 86～89 pairs of magnetic bearings of power amplifier with coil 11, with the position of control rotor 2.
According to said structure, can realize detection sensitivity and the raising of linearity and the expansion of detection range.
Preferably utilize relative two position-detection sensors 13 to carry out differential detection, but only also can detect and control by an one-sided transducer.
In magnetic bearing configuration example 1, magnetic bearing configuration example 2, variation 2, adopted eight magnetic bearings coil 11, but, by being wound on each salient pole and wiring with coil 11 with opposite direction, thereby only also can carry out the control of magnetic bearing with four power amplifiers across the relative magnetic bearing of rotor.
In variation 1, adopted 16 magnetic bearings with coils 11, and the magnetic bearing of first salient pole is reciprocal with the magnetic bearing of the coil 11 and second salient pole with the coiling direction of coil 11.These magnetic bearings with coil 11 so that reel with the also reciprocal mode of the coiling direction of coil 11 with the magnetic bearing of the coil 11 and second salient pole across the magnetic bearing of the first relative salient pole of rotor.And, by with these magnetic bearings with coil 11 wiring, thereby only just can carry out the control of magnetic bearing with four power amplifiers.
In addition, also can distinguish corresponding each magnetic bearing and use power amplifier with coil, the quantity of power amplifier increases although it is so.
(application examples 1)
Fig. 9 shows the application examples 1 that the magnetic levitaion motor that adopts embodiment 1 constitutes pump.Fig. 9 is the cutaway view of pump.
In this example, cover rotor 2, form impeller 15 with resin or nonmagnetic metal etc. at an end of rotor 2 with resin or nonmagnetic metal.
Stator 1 is the structure of the pump case 16 of covering resin or nonmagnetic metal etc.And, rotor 2 and impeller 15 are configured in the inside of pump case 16 in the mode with predetermined gap.
In addition, the invention is not restricted to above-mentioned execution mode, in the scope that does not break away from design of the present invention, can carry out various improvement, change.

Claims (1)

1. a magnetic levitaion motor is characterized in that,
This suspension motor has stator that is made of magnetic bearing portion and the rotor that is arranged in the said stator,
Constitute the magnetic bearing yoke of above-mentioned magnetic bearing portion, be circle-shaped configuration equally spacedly in the mode that predetermined space is set in the side of above-mentioned rotor,
Above-mentioned magnetic bearing yoke has two salient poles relative with the side of above-mentioned rotor, coiling magnetic bearing coil on an above-mentioned salient pole, on above-mentioned another salient pole, first permanent magnet is set, between an above-mentioned magnetic bearing portion and above-mentioned another magnetic bearing portion, second permanent magnet is set
All above-mentioned salient poles that are located at the above-mentioned second permanent magnetism side of an above-mentioned magnetic bearing portion are to be wound with the salient pole of above-mentioned magnetic bearing with coil, or are provided with the salient pole of above-mentioned first permanent magnet,
All above-mentioned salient poles that are located at the above-mentioned second permanent magnetism side of above-mentioned another magnetic bearing portion are to be wound with the salient pole of above-mentioned magnetic bearing with coil, or are provided with the salient pole of above-mentioned first permanent magnet.
CN201110101829.7A 2007-10-18 2007-10-18 Magnetic suspension motor Active CN102163942B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110101829.7A CN102163942B (en) 2007-10-18 2007-10-18 Magnetic suspension motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110101829.7A CN102163942B (en) 2007-10-18 2007-10-18 Magnetic suspension motor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN2007800168852A Division CN101501962B (en) 2007-10-18 2007-10-18 Magnetically-levitated motor and pump

Publications (2)

Publication Number Publication Date
CN102163942A true CN102163942A (en) 2011-08-24
CN102163942B CN102163942B (en) 2015-04-22

Family

ID=44464963

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110101829.7A Active CN102163942B (en) 2007-10-18 2007-10-18 Magnetic suspension motor

Country Status (1)

Country Link
CN (1) CN102163942B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105591567A (en) * 2015-11-30 2016-05-18 南京邮电大学 Taper magnetic bearing switched reluctance motor and control method thereof
CN109236858A (en) * 2018-11-26 2019-01-18 谢晓旋 A kind of Three Degree Of Freedom axial magnetic bearing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2454584Y (en) * 2000-12-06 2001-10-17 中国科学院长春光学精密机械与物理研究所 Integrated micro-end-face magnetic suspension bearing
JP2005121157A (en) * 2003-10-17 2005-05-12 Rikogaku Shinkokai Magnetic bearing and motor device for artificial heart
JP2006014528A (en) * 2004-06-28 2006-01-12 Iwaki Co Ltd Magnetic levitation motor and turbo-pump
JP2007120635A (en) * 2005-10-28 2007-05-17 Iwaki Co Ltd Hybrid-type magnetic bearing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2454584Y (en) * 2000-12-06 2001-10-17 中国科学院长春光学精密机械与物理研究所 Integrated micro-end-face magnetic suspension bearing
JP2005121157A (en) * 2003-10-17 2005-05-12 Rikogaku Shinkokai Magnetic bearing and motor device for artificial heart
JP2006014528A (en) * 2004-06-28 2006-01-12 Iwaki Co Ltd Magnetic levitation motor and turbo-pump
JP2007120635A (en) * 2005-10-28 2007-05-17 Iwaki Co Ltd Hybrid-type magnetic bearing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105591567A (en) * 2015-11-30 2016-05-18 南京邮电大学 Taper magnetic bearing switched reluctance motor and control method thereof
CN105591567B (en) * 2015-11-30 2017-06-16 南京邮电大学 A kind of taper magnetic bearing switch reluctance motor and control method
CN109236858A (en) * 2018-11-26 2019-01-18 谢晓旋 A kind of Three Degree Of Freedom axial magnetic bearing

Also Published As

Publication number Publication date
CN102163942B (en) 2015-04-22

Similar Documents

Publication Publication Date Title
CN101501962B (en) Magnetically-levitated motor and pump
CN101682229B (en) Magnetic levitation motor and pump
JP2005127222A (en) Magnetic levitating pump
US8821365B2 (en) Rotation drive device and centrifugal pump apparatus using the same
CN102792039B (en) Magnetic bearing and turbo machine
US20150311741A1 (en) Connector-free magnetic charger/winder
TW201203796A (en) Linear drive
KR100701550B1 (en) Bearingless step motor
JP6577300B2 (en) Magnetic levitation attitude control device
KR20140028007A (en) Power generating device
RU2765979C2 (en) Improved magnetic coupling assembly
CA2521688A1 (en) System and method for reducing effect of magnetic fields on a magnetic transducer
CN102163942A (en) Magnetic suspension motor and pump
EP1028515A1 (en) Permanent magnet generator
CN204965198U (en) Autorotation drive and vibration isolation cloud platform system
KR20110072896A (en) Toroidally-wound self-bearing brushless dc motor
EP1072803A2 (en) Magnetic bearing device
JP3930834B2 (en) Axial type magnetic levitation rotating equipment and centrifugal pump
CN205283323U (en) Rotation moving axis and self -driven rotational system of electromagnetism permanent magnetism direct drive
KR20160062465A (en) Rotary linear motor apparatus
JP7237256B1 (en) Linear rotary motor
CN201499112U (en) Magnetic suspension motor
CN105094155A (en) Self-driven rotation shaft vibration and local position stabilization system
CN118017875A (en) Magnetic suspension rotary driving device and centrifugal pump

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant