CN109586542B - A kind of double modulation alternating pole permanent magnetism vernier motor and its application - Google Patents
A kind of double modulation alternating pole permanent magnetism vernier motor and its application Download PDFInfo
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- CN109586542B CN109586542B CN201811288504.2A CN201811288504A CN109586542B CN 109586542 B CN109586542 B CN 109586542B CN 201811288504 A CN201811288504 A CN 201811288504A CN 109586542 B CN109586542 B CN 109586542B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
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Abstract
The present invention discloses a kind of double modulation alternating pole permanent magnetism vernier motor and its application, comprising: primary iron core, armature winding are set in each open slot of primary iron core；Its same side is provided with the consistent primary permanent magnet body of magnetizing direction；Primary permanent magnet body magnetizing direction is parallel with the primary iron core direction of motion, and then forms the first alternating pole permanent magnet excitation array；Secondary iron core, and the spaced and parallel setting of primary iron core, and be located at primary iron core and slot side, the two can relatively move；Secondary iron core offers spaced apart multiple open slots relative to the surface of primary iron core, is provided with secondary permanent magnet；Secondary permanent magnetism magnetizing direction is vertical with the primary iron core direction of motion, and then forms the second alternating pole permanent magnet excitation array；First and second alternating pole permanent magnet excitation array magnetizing direction matches.Using alternately pole permanent magnet array, compared with conventional secondary durface mounted permanent magnet linear motor, permanent magnet dosage can substantially reduce secondary motor of the present invention, substantially reduce motor cost.
Description
Technical field
The present invention relates to magneto technical fields, replace pole permanent magnetism vernier motor more particularly, to a kind of double modulation
And its application.
Background technique
Currently, numerically-controlled machine tool develops to accurate, high speed, compound, intelligent, environmentally friendly direction.Accurate and High-speed machining
To transmission and its control, more stringent requirements are proposed, higher dynamic characteristic and control precision, higher feed speed and acceleration
Degree, lower vibration noise and smaller abrasion.The crux of problem in traditional transmission chain from the motor as power source to
Workpiece will be by the intermediate transmissions link such as gear, worm and gear, belt, lead screw, shaft coupling, clutch, in these links
In produce biggish rotary inertia, flexible deformation, backlass, motion delay, friction, vibration, noise and abrasion.Although
These aspects make transmission performance increase by constantly improving, but problem is difficult fundamentally to solve, and then occur " straight
Connect transmission " concept, that is, cancel various intermediate links between motor to workpiece.
With the development of motor and its Drive Control Technique, the appearance of linear motor and technology it is increasingly mature, make straight line
" direct-drive " concept of coordinate motion comes true, and increasingly shows its huge superiority: Linear motor feeding system is adopted
With Zero-drive Chain mode, revolutionizing traditional ball-screw-transmission mode, there are congenital disadvantages, and have speed height, accelerate
Degree is big, positioning accuracy is high, stroke length is unrestricted etc. a little.Linear motor and its Drive Control Technique drive in machine tool feed
On application, so that the drive mechanism of lathe great change is occurred, and machine tool capability is made to have new leap.
In linear motor application field, traditional permanent magnet linear synchronous motor is directly driving occasion with wide with its excellent properties
Application prospect, using low-speed high-thrust as Further aim, permanent magnetism vernier linear motor is studied.This kind of motor is based on magnetic field
Modulation theory work, thus also known as magnetic field modulation permanent-magnetism linear motor.Magnetic field modulation basic principle is adjusted using armature fluting
Permanent magnetic field and armature field processed generate the higher hamonic wave magnetic field to play a major role, to make motor stable operation under the low speed.
Compared with traditional permanent magnetic linear synchronous motor, its main feature is that there is biggish thrust density and lesser force oscillation, in full
The fields such as control lathe, servo-system, Wave energy generating system, elevator, pumping unit, rail traffic or drilling machine, which have, preferably answers
Use prospect.
Fig. 1 is the structural schematic diagram of existing traditional permanent magnetism vernier motor, which is linear motor.As shown in Figure 1, traditional
Permanent magnetism vernier linear motor includes primary part and sub-section: wherein primary part includes the primary iron core with notching construction
1 and the armature winding 3 that is surrounded in primary iron core tooth socket；Sub-section includes secondary iron core 5 and Surface Mount in secondary iron core
The common permanent magnet array 7 of secondary.Traditional permanent magnetism vernier linear motor generally uses armature to be around in short primary, and permanent magnet Surface Mount exists
Long secondary topological structure, although having excellent thrust performance compared to traditional permanent magnetic linear synchronous motor, there is also such as
Lower problem seriously constrains this kind of motor in the practical application in all kinds of fields:
In long stroke, permanent magnet dosage is big, and material cost is high；It is easy to form in use since permanent magnetism magnetic pole is more
A large amount of leakage fields further will lead to frequency inverter capacity increase, increase device cost so that motor overall power factor is lower；Directly
The equal Surface Mount permanent magnet in line motor secondary surface, permanent magnet is fragile material, is easy damage, while being easy to adsorb magnetic conductivity clast,
Improve the maintenance cost and service life of motor；The thrust density of traditional permanent magnetism vernier linear motor is still unable to satisfy higher want
The accelerating ability index asked, i.e. thrust density still need to be further increased.
Summary of the invention
In view of the drawbacks of the prior art, it is an object of the invention to solve existing permanent magnetism vernier motor in long stroke, forever
Magnet dosage is big, and material cost is high；In use since permanent magnetism magnetic pole is more, a large amount of leakage fields easy to form, motor secondary surface
Equal Surface Mount permanent magnet, permanent magnet is fragile material, is easy damage and thrust density is still unable to satisfy the acceleration of requirements at the higher level
The technical issues of energy index.
In order to solve the above technical problems, in a first aspect, the present invention provides a kind of double modulation alternating pole permanent magnetism vernier motor, packet
It includes: primary iron core and secondary iron core；Primary iron core includes armature winding, therefore is primary iron core；Secondary iron core without armature winding, therefore
For secondary iron core.To prevent from obscuring the directionality problem hereinafter occurred, establishing x-axis with motor movement direction indicates motor level side
To (hereafter " right side ", " left side " are the one positive one negative of the direction), establishing y-axis with the up and down direction of primary and secondary indicates that motor is perpendicular
For histogram to (hereafter "upper", "lower" are the one positive one negative of the direction), z-axis indicates motor thickness direction, hereafter " outwardly ", " court
In " it is the one positive one negative of the direction.
The primary iron core and the spaced and parallel setting of secondary iron core, the two can be relatively moved along x-axis or so；The primary iron
The heart and secondary iron core are arranged (for convenience of describing, the following contents is preferred above secondary iron core with primary iron core) up and down, described
Primary iron core and secondary iron core are (teeth portion) structure with teeth, and tooth is parallel toothing, and then adjacent two tooth forms open slot；Institute
The open slot direction for stating primary iron core is downward, towards secondary iron core；The open slot direction of the secondary iron core is upward, towards primary
Iron core；
At the beginning of the same side (left or right side) Surface Mount cuboid of the magnetizing direction along x-axis of each tooth of the primary iron core
Grade permanent magnet, and then an entirety, all primary permanent magnets are formed with each primary teeth portion per a piece of primary permanent magnet body
Body forms the first alternating pole permanent magnet array；One group of armature winding further is set in primary open slot remaining space.
The slot bottom Surface Mount of each open slot of the secondary iron core has cuboid secondary permanent magnet of the magnetizing direction along y-axis,
All secondary permanent magnets form the second alternating pole permanent magnet array；
The first alternating pole permanent magnet array, which replaces pole permanent magnet array magnetizing direction with second, to be mutually matched,
It is as follows with principle:
Two sets of permanent magnet arrays individually arrange that Shi Junneng generates magnetic field in motor, and then opposite in electric motor primary and secondary
Back-emf is generated after displacement in armature winding；When two sets of permanent magnet excitation arrays are simutaneously arranged, electric motor primary and secondary exist
It should can be generated under the conditions of identical relative displacement, in identical armature winding more independent than any a set of permanent magnet excitation array
The higher back-emf of back-emf amplitude generated when arrangement.
A kind of double modulation replaces pole permanent magnetism vernier motor, wherein the primary permanent magnet body forms the first alternating pole
Permanent magnet array meets the number of pole-pairs P of the first alternating pole permanent magnet arraym1With primary iron core number N of teeth1It is equal.
A kind of double modulation replaces pole permanent magnetism vernier motor, wherein the secondary permanent magnet forms the second alternating pole
Permanent magnet array meets the number of pole-pairs P of the second alternating pole permanent magnet arraym2With the secondary iron core number N of teeth under primary core length2
It is equal.
A kind of double modulation replaces pole permanent magnetism vernier motor, wherein the armature winding magnetic field number of pole-pairs Pa, first
The alternately number of pole-pairs P of pole permanent magnet excitation arraym1, primary iron core number N of teeth1, second alternating pole permanent magnet excitation array it is extremely right
Number Pm2And the secondary iron core number N of teeth under primary core length2Between meet vernier motor principle, i.e. Pa=| Pm1±N2| and Pa
=| Pm2±N1|。
In an optional example, if the shape of the primary iron core and secondary iron core is strip, the primary iron
The heart is linear motion relative to the movement of the secondary iron core, then the double modulation alternating pole permanent magnetism vernier motor is straight-line electric
Machine.
In an optional example, if the shape of the primary iron core and secondary iron core is ring-type, the primary iron
The heart is rotary motion relative to the movement of the secondary iron core, then the double modulation alternating pole permanent magnetism vernier motor is radial direction or axis
To rotating electric machine.
On the other hand, the present invention provides a kind of answering for the double modulation that above-mentioned first aspect provides alternating pole permanent magnetism vernier motor
With specifically including: double modulation alternating pole permanent magnetism vernier motor apply numerically-controlled machine tool, servo-system, Wave energy generating system,
In elevator, pumping unit, rail traffic or drilling machine.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have below beneficial to effect
Fruit:
(1) motor of the invention has been respectively arranged one group with secondary and replaces pole permanent magnet array using primary.Two sets of permanent magnetism
Volume array is based on the work of magnetic field modulation principle, individually arranges that Shi Junneng generates magnetic field in motor, so in electric motor primary and
Back-emf is generated in armature winding after secondary relative displacement；When two sets of permanent magnet array magnetizing directions meet above-mentioned preferred requirement
When, the magnetic circuit generated can cooperate, and so that the air gap flux density of motor is significantly strengthened, while increasing and joining with winding turns
Magnetic linkage, promoted motor gas-gap transmitting electromagnetic power ability.When electric motor primary and secondary under the conditions of identical relative displacement,
In identical armature winding, motor of the invention, which can be generated, individually arranges that when generates than any a set of permanent magnet excitation array
The higher back-emf of back-emf amplitude is finally reached the target for improving motor thrust.
(2) in motor of the invention, secondary is subtracted compared with traditional vernier permanent-magnetism linear motor using alternately pole permanent magnet
The secondary above permanent magnet dosage is lacked, the manufacturing cost of motor can be significantly reduced in the application of long secondary short primary.
(3) in motor of the invention, secondary replaces the interpole in extremely (teeth portion of secondary iron core is alternatively referred to as interpole)
It is made of materials such as silicon steel, energy effective protection permanent magnet pole greatly reduces what permanent magnet in motor use process was destroyed
Probability improves motor reliability.
(4) motor of the invention is used by integrating double modulation alternating pole permanent magnet array and vernier permanent-magnetism linear motor,
The thrust density for improving linear motor further reduces motor volume under Same Efficieney grade, while improving motor
Dynamic property.
(5) above-mentioned advantage makes motor of the invention compared with prior art, and the General Promotion power performance of motor reduces
Manufacturing cost reduces motor size, increases reliability, further improves the industrial application of vernier permanent-magnetism linear motor
Value is applicable to the low-speed high-thrusts such as high-grade lathe, conveyer system, servo-system, Wave energy generating system or needs quick
The occasion of response.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of vernier permanent-magnetism linear motor in the prior art；
Fig. 2 is that the double modulation of one embodiment of the invention replaces the structural schematic diagram of pole permanent magnetism vernier linear motor；
Fig. 3 is that the double modulation of another embodiment of the present invention replaces the structural schematic diagram of pole permanent magnetism vernier linear motor；
Fig. 4 is that only when primary permanent magnet excitation, the part magnetic line of force moves towards schematic diagram in one embodiment of the invention；
Fig. 5 is that only when secondary permanent magnet excitation, the part magnetic line of force moves towards schematic diagram in one embodiment of the invention；
Unloaded magnetic line of force when Fig. 6 is the common excitation of primary and secondary permanent magnet in one embodiment of the invention is distributed signal
Figure；
Fig. 7 is magnetic line of force distribution schematic diagram of the vernier permanent-magnetism linear motor of the prior art under zero load；
Fig. 8 is the schematic diagram that the effect of one embodiment of the invention double modulation can effectively promote back-emf；
Fig. 9 is the double modulation alternating pole permanent magnetism vernier linear motor of one embodiment of the invention by Halbach type permanent magnetism
Body constitutes the arrangement schematic diagram of secondary alternately pole permanent magnet array；
Figure 10 is that the double modulation alternating pole permanent magnetism vernier motor of one embodiment of the invention shows as the structure of rotating electric machine
It is intended to；
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which: 1 is primary iron core；
2 be primary teeth portion；3 be primary armature winding；4 be primary alternately pole permanent magnet array；5 be secondary iron core；6 be secondary teeth portion；7
For secondary common permanent magnet array；8 be secondary alternately pole permanent magnet array；9 be secondary Halbach type permanent magnet array；10 are
Rotary electric machine iron core；11 be rotary electric machine teeth portion；12 be rotary electric machine armature winding；13 turn for rotating electric machine
Sub- iron core；14 be rotary motor rotor teeth portion.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
For the defect or Improvement requirement in the prior art, the present invention proposes a kind of double modulation alternating pole permanent magnetism vernier electricity
Machine.The primary of the motor has been respectively arranged one group with secondary and has replaced pole permanent magnet array, and two sets of permanent magnet arrays are based on magnetic field
Modulation principle work, the magnetic circuit of generation can cooperate, and effectively reduce air gap leakage field, promote air-gap field density, go forward side by side one
Step improves the thrust density of motor, improves power factor.On the other hand, since secondary is using alternately pole permanent magnet array, with biography
System permanent magnetism vernier linear motor compare, secondary permanent magnet reduce half, long stroke application can substantially reduce motor at
This.Simultaneously because the interpole replaced in extremely is made of materials such as silicon steel, energy effective protection permanent magnet pole greatly reduces electricity
The probability that permanent magnet is destroyed in machine use process, improves motor reliability.
In an example, the technical solution for realizing the aim of the invention is as follows:
In order to solve the above technical problems, in a first aspect, the present invention provides a kind of double modulation alternating pole permanent magnetism vernier motor, packet
It includes: primary iron core and secondary iron core；Primary iron core includes armature winding, therefore is primary iron core；Secondary iron core without armature winding, therefore
For secondary iron core.To prevent from obscuring the directionality problem hereinafter occurred, based on optional example shown in Fig. 2, coordinate is established
System, establishing x-axis with motor movement direction indicates motor horizontal direction (hereafter " right side ", " left side " are the one positive one negative of the direction),
Establishing y-axis with the up and down direction of primary and secondary indicates that (hereafter "upper", "lower" are the one positive one of the direction to motor vertical direction
It is negative), z-axis indicates motor thickness direction, hereafter " outwardly ", " inwardly " be the one positive one negative of the direction.
The primary iron core and the spaced and parallel setting of secondary iron core, the two can be relatively moved along x-axis or so；The primary iron
The heart and secondary iron core are arranged (for convenience of describing, the following contents is preferred above secondary iron core with primary iron core) up and down, described
Primary iron core and secondary iron core are (teeth portion) structure with teeth, and tooth is parallel toothing, and then adjacent two tooth forms open slot；Institute
The open slot direction for stating primary iron core is downward, towards secondary iron core；The open slot direction of the secondary iron core is upward, towards primary
Iron core；
At the beginning of the same side (left or right side) Surface Mount cuboid of the magnetizing direction along x-axis of each tooth of the primary iron core
Grade permanent magnet, and then an entirety, all primary permanent magnets are formed with each primary teeth portion per a piece of primary permanent magnet body
Body forms the first alternating pole permanent magnet array；One group of armature winding further is set in primary open slot remaining space.
The slot bottom Surface Mount of each open slot of the secondary iron core has cuboid secondary permanent magnet of the magnetizing direction along y-axis,
All secondary permanent magnets form the second alternating pole permanent magnet array；
The selection and cooperation of first and second alternating pole permanent magnet excitation array magnetizing direction, should be using following effect as choosing
Select foundation: two sets of permanent magnet excitation arrays individually arrange that Shi Junneng generates magnetic field in motor, and then in electric motor primary and secondary
Back-emf is generated after relative displacement in armature winding；When two sets of permanent magnet excitation arrays are simutaneously arranged, electric motor primary and time
Grade should can be generated under the conditions of identical relative displacement, in identical armature winding than any a set of permanent magnet excitation array
The higher back-emf of back-emf amplitude individually generated when arrangement.
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein described first
Grade permanent magnet Surface Mount is in the same side for each tooth for forming open slot, including teeth portion in any one of the primary iron core direction of motion
Side.
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein described the
One, which replaces pole permanent magnet excitation array magnetizing direction with second, matches, including primary permanent magnet body South Pole face and teeth portion are pasted
It closes, then secondary permanent magnet South Pole face is bonded with secondary iron core；Correspondingly, primary permanent magnet body north pole face is bonded with teeth portion, then
The secondary permanent magnet north pole face is bonded with secondary iron core, so that primary permanent magnet body and secondary permanent magnet collective effect reach enhancing
Excitation effect.
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein described first
Grade permanent magnet forms the number of pole-pairs P that the first alternating pole permanent magnet excitation array meets the first alternating pole permanent magnet excitation arraym1With
Primary iron core number N of teeth1It is equal.
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein described time
Grade permanent magnet forms the number of pole-pairs P that the second alternating pole permanent magnet excitation array meets the second alternating pole permanent magnet excitation arraym2With
Secondary iron core number N of teeth under primary core length2It is equal.
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein the electricity
Pivot winding magnetic field number of pole-pairs Pa, first alternating pole permanent magnet excitation array number of pole-pairs Pm1, primary iron core number N of teeth1, second alternating
The number of pole-pairs P of pole permanent magnet excitation arraym2, secondary iron core number N of teeth under primary core length2Between meet vernier motor original
Reason, i.e. Pa=| Pm1±N2| and Pa=| Pm2±N1|。
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein described first
Grade iron core is mover core, and correspondingly the secondary iron core is stator core；Or the primary iron core is stator core, it is described secondary
Grade iron core is mover core.
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein described first
Grade iron core and secondary iron core are strip, and the primary iron core is linear motion relative to the movement of the secondary iron core, accordingly
Ground, the double modulation alternating pole permanent magnetism vernier motor is linear motor.
As present invention further optimization, a kind of double modulation replaces pole permanent magnetism vernier motor, wherein described first
Grade iron core and secondary iron core are ring-type, and the primary iron core is rotary motion relative to the movement of the secondary iron core, accordingly
Ground, the double modulation alternating pole permanent magnetism vernier motor is axially or radially rotating electric machine.
It is another aspect of this invention to provide that provide a kind of above-mentioned double modulation alternating pole permanent magnetism vernier motor numerically-controlled machine tool,
Application in servo-system, Wave energy generating system, elevator, pumping unit, rail traffic or drilling machine.
Fig. 2 is that the double modulation of one embodiment of the invention replaces the structural schematic diagram of pole permanent magnetism vernier motor, the double modulation
Alternately permanent magnetism vernier motor in pole is linear motor, but is not limited only to this.Now by taking Fig. 2 as an example, its structure is described as follows:
The motor of the present embodiment invention includes primary part and sub-section, and wherein primary part includes primary iron core 1, secondary
Grade part includes secondary iron core 5.Primary iron core 1 and secondary iron core 5 are notching construction.Primary iron core and/or secondary iron core by
Soft magnetic materials slice is overrided to form, such as silicon steel, amorphous alloy, wherein the number of teeth on primary iron core is N1, in secondary iron core
The number of teeth do not do it is particular fixed, depending on the motion range of primary iron core, it is generally preferable to more than slot number on primary iron core.
It is placed with armature winding 3 in the slot of primary iron core 1, is surrounded in primary iron core tooth socket, number of pole-pairs Pa,
Possess P accordingly for generating after being passed through corresponding alternating currentaTo the armature travelling-magnetic-field of pole.The N of primary iron core 11A teeth portion
2 the same side, which uniformly installs, is equipped with primary permanent magnet body 4；4 magnetizing direction of primary permanent magnet body is parallel in the direction of motion, further makes just
The primary teeth portion 2 and other side winding space of grade permanent magnet 4 side are formed to have and be perpendicularly to the direction of movement and reversed fixation
Magnetic pole is further formed the first alternating pole permanent magnet array.
Secondary iron core 5 and the primary iron core 1 are with the setting of certain air gap separation, and the two can relatively move, such as this reality
It applies as linear motor in example, this relative movement is opposite linear motion.But the relative movement in the present invention is not limited to directly
Line movement, can be opposite rotation, to be suitable for rotating electric machine, such as axially or radially motor.
Secondary iron core 5 offers spaced apart multiple open slots relative to the surface of primary iron core 1, is provided with secondary
Grade permanent magnet 8, the teeth portion 6 between each open slot of secondary iron core 5 are used as fixed magnetic pole, and then form the second alternating pole permanent magnet battle array
Column.Secondary teeth portion 6 as alternately pole magnetic pole iron, can with secondary iron core 5 together punching manufacture, it is secondary by the Magnetic circuit characters of motor
Ferromagnetic material indicated by grade teeth portion 6 can be magnetized under the effect of adjacent permanent magnet, to realize the closure of motor magnetic circuit.
By taking Fig. 2 as an example, the double modulation principle of heretofore described motor is described as follows:
Heretofore described primary permanent magnet body forms the first alternating pole permanent magnet excitation array and meets the first alternating pole permanent magnetism
The number of pole-pairs P of body excitation arraym1With primary iron core number N of teeth1It is equal, and generate and possess P accordinglym1To the first excitation traveling wave of pole
Magnetic field；According to magnetic field modulation principle, the first excitation travelling-magnetic-field can modulate under the action of secondary tooth | Pm1±N2| to pole
First work travelling-magnetic-field.Similarly, the secondary permanent magnet forms second alternating pole permanent magnet excitation array the second alternating of satisfaction
The number of pole-pairs P of pole permanent magnet excitation arraym2With the secondary iron core number N of teeth under primary core length2It is equal, and generate and gather around accordingly
There is Pm2To the second excitation travelling-magnetic-field of pole；According to magnetic field modulation principle, the second excitation travelling-magnetic-field under the action of primary teeth,
Can modulate | Pm2±N1| to the second work travelling-magnetic-field of pole.Meanwhile the magnetic field number of pole-pairs of the armature winding is Pa, logical
Generation possesses P accordingly after entering corresponding alternating currentaTo the armature travelling-magnetic-field of pole.According to motor work basic principle, when
Armature winding magnetic field number of pole-pairs Pa, first alternating pole permanent magnet excitation array number of pole-pairs Pm1, primary iron core number N of teeth1, second hand over
For the number of pole-pairs P of pole permanent magnet excitation arraym2, secondary iron core number N of teeth under primary core lengthaBetween meet Pa=| Pm1±
N2|=| Pm2±N1| when, the first, second work travelling-magnetic-field can be coupled with armature travelling-magnetic-field simultaneously, generate constant thrust
(or torque).Above-mentioned principle is double modulation principle.
By taking embodiment electric machine structure shown in Fig. 2 as an example, primary core tooth slot number is 6, and primary core tooth part arrangement is forever
Magnet number is 6, and corresponding first alternating pole permanent magnet array is 6 pairs of poles；The direction of motion of the secondary iron core for primary iron core 1
Secondary permanent magnet number under length is 5, then corresponding second alternating pole permanent magnet array is 5 pairs of grades.It is former according to above-mentioned modulation
Reason, two sets of permanent magnets can produce the work travelling-magnetic-field of 1 pair of pole, and armature winding is needed to form 1 pair of pole, anti-to carry out armature
Thrust or torque should be generated.Therefore, armature winding 3 is preferably distributed Double Layer Winding using three-phase, turns to the form of 1 pair of pole, and
After passing to corresponding alternating current, embodiment can meet the working principle movement of double modulation.
To be described as follows to the cooperation of the alternating pole permanent magnet array of heretofore described motor shown in Fig. 2-Fig. 7:
As shown in figure 3, secondary permanent magnet and the pole orientation of primary permanent magnet body are opposite with the pole orientation in Fig. 2.Such as
Fig. 2 and Fig. 3, but it is not limited to Fig. 2 and Fig. 3, the first alternating pole permanent magnet array and secondary permanent magnet 8 that primary permanent magnet body 4 is formed
The the second alternating pole permanent magnet array formed can cooperate.
As shown in Fig. 2, in one embodiment, the permanent magnet array that double modulation replaces pole includes primary permanent magnet volume array 4
The second alternating pole permanent magnet array that the first alternating pole permanent magnet array and secondary permanent magnet 8 formed is formed.Preferably, primary
The magnetizing direction of permanent magnet array 4 is consistent with motor movement direction, and the South Pole of permanent magnet is bonded with primary teeth portion 2, and secondary is forever
The magnetizing direction of magnet array 8 and motor movement direction are perpendicular, and the South Pole of permanent magnet is bonded with secondary iron core 6, by the party
It can cooperate to two sets of alternating pole permanent magnet arrays of arrangement, play the role of improving air gap flux density.
As shown in figure 3, in one embodiment, the magnetizing direction of primary permanent magnet volume array 4 is consistent with motor movement direction,
And the arctic of permanent magnet is bonded with primary teeth portion 2, the magnetizing direction of secondary permanent magnet array 8 and motor movement direction are perpendicular,
And the arctic of permanent magnet is bonded with secondary iron core 6, can be cooperated, be risen by two sets of alternating pole permanent magnet arrays of direction arrangement
To the effect for improving air gap flux density.Fig. 3 is the structure by embodiment illustrated in fig. 2 by reversely obtaining permanent magnet magnetizing direction,
But the present invention is not limited to these structures, other similar structure is all belonged to the scope of protection of the present invention.
By taking Fig. 2 structure as an example, illustrate two sets of alternately specific magnetic field cooperation principles of pole permanent magnet array in conjunction with Fig. 4-Fig. 7:
As shown in figure 4, permanent magnet generates the magnetic line of force as shown in black dotted lines when only the first alternating of setting pole permanent magnet array, with
Armature winding circle connection, and then generate back-emf；As shown in figure 5, permanent magnet produces when only the second alternating of setting pole permanent magnet array
The raw magnetic line of force as shown in black dotted lines, can also join with armature winding circle, and then generate back-emf；And then as shown in fig. 6, when same
When first and second alternating pole permanent magnet array is set, the magnetic line of force that two groups of permanent magnetism generate cooperates, and generates as shown in Figure 6
Magnetic line of force cloud charts.Traditional permanent magnetism vernier linear motor by taking Fig. 1 structure as an example is reference, and common permanent magnet array produces
Raw magnetic line of force cloud charts are as shown in Figure 7.Comparison diagram 6 and Fig. 7, it is clear that in motor of the invention, mutually matched permanent magnet
Array is introduced into the magnetic flux leakage in the air gap in primary core tooth part remittance main flux path.It can make motor in this way
Air gap flux density is significantly strengthened, and improves the ability of motor gas-gap transmitting electromagnetic power, so by primary iron core and with electricity
The magnetic line of force of pivot winding turns connection obviously increases, that is, has reached the effect of enhancing main flux (magnetic flux to interlink with armature winding)
Fruit, so as to improve the counter electromotive force of motor, and so as to improve electromagnetic performances such as thrust density and power factors.
Fig. 8 is the schematic diagram that the effect of one embodiment of the invention double modulation can effectively promote back-emf, shown in Figure 8,
Electric motor primary and it is secondary should can be generated under the conditions of identical relative displacement, in identical armature winding than it is any it is a set of forever
The higher back-emf of back-emf amplitude that magnet excitation array generates when individually arranging.Meanwhile it is double referring to two sets of permanent magnets in Fig. 8
Back-emf curve under modulating action, under primary equal volume, when armature winding is passed through the alternating current of same current density, this hair
Bright double modulation alternating pole vernier permanent-magnetism linear motor (such as Fig. 4) can relative to traditional permanent magnetism vernier linear motor (such as Fig. 1)
Thrust is promoted 25% or more.
Certainly, alternating pole permanent magnet array of the invention is not limited to the set-up mode of above-described embodiment, and Fig. 9 show secondary
Grade permanent magnet array is by Halbach type set of permanent magnets at the secondary Halbach type permanent magnet array 9 of composition.Correspondingly, described
The magnetizing direction of secondary Halbach type permanent magnet array should be matched with primary permanent magnet volume array 4, to play double modulation increasing
The effect of magnetic.The present invention includes but is not limited to Halbach type permanent magnet array form, other to arrange in primary teeth portion side
Permanent magnet array and permanent magnet array is arranged in secondary, while can form the alternating pole permanent magnet array that two sets match to mention
The mode of lifting motor performance contains within protection scope of the present invention.
The present invention is directed to propose, secondary permanent magnet array cooperation primary with two sets generates double modulation effect, to promote electricity
Machine correlated performance.For above-mentioned principle analysis linear motor shown in Fig. 2, but the present invention is not limited to the motors of linear motion.
As shown in Figure 10, in a preferred embodiment, primary part is stator, and sub-section is rotor, and relative motion becomes rotating,
Then embodiment is that double modulation replaces pole permanent magnetism vernier rotating electric machine.Other meet also falling within for structure of the invention and motor operation principle
In the scope of the present invention.
The typical case of motor of the invention can include but is not limited to conveyer system, servo-system, pumping unit, electromagnetism bullet
Injection device, plotter, elevator, Wave energy generating system etc. need the occasion of the linear motion of high thrust or high dynamic response.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of double modulation replaces pole permanent magnetism vernier motor characterized by comprising primary iron core and secondary iron core；
The primary iron core and the spaced and parallel setting of secondary iron core, the two can relatively move；The primary iron core is located at secondary iron
The upper surface of heart, the primary iron core and secondary iron core are equipped with open slot, and the open slot direction of the primary iron core is downward, described
The open slot direction of secondary iron core is upward；
One group of armature winding is set in each open slot of the primary iron core, the same side of each armature winding, which is provided with, magnetizes
The consistent primary permanent magnet body in direction, the magnetizing direction of the primary permanent magnet body is parallel with the primary direction of motion of iron core, shape
At the first alternating pole permanent magnet excitation array；
The open slot arranged for interval of the secondary iron core is provided in the open slot of each secondary iron core magnetizing direction consistent time
Grade permanent magnet, the magnetizing direction of the secondary permanent magnet is vertical with the primary direction of motion of iron core, forms the second alternating pole
Permanent magnet excitation array；The iron core of each open slot two sides is teeth portion, and the width of the secondary iron core teeth portion is greater than the primary
The width of core tooth part, so that the open slot arranged for interval of the secondary iron core；
The first alternating pole permanent magnet excitation array replaces pole permanent magnet excitation array magnetizing direction with second and matches；Packet
Include: if the South Pole face of the primary permanent magnet body is bonded with teeth portion, the South Pole face of the secondary permanent magnet is bonded with secondary iron core；
If or the north pole face of the primary permanent magnet body is bonded with teeth portion, the north pole face of the secondary permanent magnet is bonded with secondary iron core,
So that primary permanent magnet body and secondary permanent magnet collective effect achieve the effect that enhance excitation.
2. double modulation according to claim 1 replaces pole permanent magnetism vernier motor, which is characterized in that each armature winding it is same
Side is provided with the consistent primary permanent magnet body of magnetizing direction, wherein the same side of each armature winding is the primary iron core direction of motion
Any side.
3. double modulation according to claim 1 replaces pole permanent magnetism vernier motor, which is characterized in that first alternating pole is forever
The number of pole-pairs P of magnet excitation arraym1With primary iron core number N of teeth1It is equal；Described second replaces the extremely right of pole permanent magnet excitation array
Number Pm2With the secondary iron core number N of teeth under primary core length2It is equal.
4. double modulation according to claim 3 replaces pole permanent magnetism vernier motor, which is characterized in that the armature winding magnetic field
Number of pole-pairs Pa, first alternating pole permanent magnet excitation array number of pole-pairs Pm1, primary iron core number N of teeth1, second alternating pole permanent magnet encourage
The number of pole-pairs P of magnetic arraym2, secondary iron core number N of teeth under primary core length2Between meet vernier motor principle, i.e. Pa=| Pm1
±N2| or Pa=| Pm2±N1|。
5. double modulation according to claim 4 replaces pole permanent magnetism vernier motor, which is characterized in that the secondary permanent magnet is
Halbach type permanent magnet.
6. double modulation according to any one of claims 1 to 5 replaces pole permanent magnetism vernier motor, which is characterized in that if described
The shape of primary iron core and secondary iron core is strip, and the primary iron core is straight line fortune relative to the movement of the secondary iron core
Dynamic, then the double modulation alternating pole permanent magnetism vernier motor is linear motor.
7. double modulation according to any one of claims 1 to 5 replaces pole permanent magnetism vernier motor, which is characterized in that if described
The shape of primary iron core and secondary iron core is ring-type, and the primary iron core is rotation fortune relative to the movement of the secondary iron core
Dynamic, then the double modulation alternating pole permanent magnetism vernier motor is axially or radially rotating electric machine.
8. such as the application of double modulation described in any one of claim 1 to 5 alternating pole permanent magnetism vernier motor, which is characterized in that packet
Include: the double modulation alternating pole permanent magnetism vernier motor is applied in numerically-controlled machine tool, servo-system, Wave energy generating system, elevator, pumping
In oil machine, rail traffic or drilling machine.
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| CN201811288504.2A CN109586542B (en) | 2018-10-31 | 2018-10-31 | A kind of double modulation alternating pole permanent magnetism vernier motor and its application |
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