CN104836355A - Rotor of rotary motor, permanent magnetic motor, compressor and air-conditioning system - Google Patents
Rotor of rotary motor, permanent magnetic motor, compressor and air-conditioning system Download PDFInfo
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- CN104836355A CN104836355A CN201510247107.0A CN201510247107A CN104836355A CN 104836355 A CN104836355 A CN 104836355A CN 201510247107 A CN201510247107 A CN 201510247107A CN 104836355 A CN104836355 A CN 104836355A
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Abstract
The invention discloses a rotor of a rotary motor, a permanent magnetic motor, a compressor and an air-conditioning system. The rotor of the rotary motor comprises a body, the body is provided with multiple magnetic poles arranged to be spaced along a circumferential direction, the multiple magnetic poles are rotationally symmetrical relative to the rotation center of the body, each magnetic pole comprises a first permanent magnet and a second permanent magnet, and the coercive force of each first permanent magnet is more than two times that of each first permanent magnet. According to the rotor of the rotary motor provided by one embodiment of the invention, the counterelectromotive force coefficient of the motor can be flexibly adjusted according to the need of the operation speed of the rotor, the motor always runs at a high-efficiency state, and at the same time, the rotating speed scope of a conventional motor can also be enlarged.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, more specifically, the rotor relating to a kind of electric rotating machine and permanent magnet motor, compressor and the air-conditioning system with it.
Background technology
At present, in high-speed operating range, in high efficiency magneto, for expansion speed scope and the raising efficiency of lifting motor, the rotor of the built-in magnet structure of general selection, there is under each magnetic pole monolithic or polylith permanent magnet trough embed radially or the permanent magnet of arranged tangential, and by reasonably arranging the magnet isolation tank quantity shape of interpolar, or by regulating the shape of rotor periphery, guarantee that motor is while having higher efficiency, possess again lower cost, and good noise and vibration characteristics.
Recent years, along with the progress of control technology and the development of permanent magnet material industry, there is following rotor: rotor is made up of the magnet of more than two pieces or two pieces, by the pulse current in stator winding, realize the adjustment of the magnetic property to magnet.And then motor, when low-speed running, possesses high back-emf, input current reduces, and the lifting of implementation efficiency, when running up, possessing low back-emf, realizing the expansion of the range of speeds.Thus make motor interval in whole service, possess higher efficiency all the time, possess again large expansion speed scope simultaneously.
In the mandate specification of Chinese patent CN 101501967 B, disclose a kind of rotor structure of above-mentioned motor, each extremely under permanent magnet be made up of two kinds of permanent magnets of the long-pending equal or inequality of coercive force and direction of magnetization thickness, two kinds of above-mentioned permanent magnets, a kind of center along rotor, the roughly arrangement in " in-line ", vertical with d axle, another magnet, along the radial direction of motor, is radially arranged, and is interspersed and together form the magnetic pole of motor.
In above-mentioned patent, because the magnetic energy product of the long-pending little magnet of coercive force and direction of magnetization thickness is also smaller, and occupy rotor part volume, therefore under keeping the prerequisite that stator structure is constant, compare with long-pending large magnet " one " the font rotor of direction of magnetization thickness with the simple coercive force that adopts, back emf coefficient can reduce, and the torque density of motor also can decrease.
In order to reach the effect the same with " in-line " rotor, just need the grade of the long-pending large magnet improving coercive force and direction of magnetization thickness, and this can cause the increase of motor cost.
In addition, in above-mentioned patent, two kinds of permanent magnet cross sections of coercive force and direction of magnetization thickness inequality are not common rectangle, and permanent magnet is embedded in independent magnet groove respectively, add manufacture and assembly difficulty.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least to a certain extent.
For this reason, the present invention proposes a kind of rotor of electric rotating machine, and this rotor structure is simple, can improve the running efficiency of motor, can also expand the range of speeds of motor.
The present invention also proposes a kind of permanent magnet motor with the rotor of above-mentioned electric rotating machine.
The present invention also proposes a kind of compressor with above-mentioned permanent magnet motor.
The present invention also proposes a kind of air-conditioning system with above-mentioned compressor.
The rotor of the electric rotating machine of embodiment according to a first aspect of the present invention, comprise: body, described body is provided with multiple magnetic pole arranged spaced apart along its circumference, multiple described magnetic pole is relative to the pivot Rotational Symmetry of described body, each described magnetic pole comprises the first permanent magnet and the second permanent magnet respectively, and the coercive force of wherein said second permanent magnet is more than the coercitive twice of described first permanent magnet.
According to the rotor of the electric rotating machine of the embodiment of the present invention, when motor rotation, can according to load needs, in motor stator winding inside by the instant pulse current larger than running current, pulse current produces instantaneous high magnetic field intensity on rotor, the value of magnetic field intensity can more than the irreversible attached magnetic coercive force of the first permanent magnet, but the value of magnetic field intensity is lower than the irreversible attached magnetic coercive force of the second permanent magnet.Accordingly, the maximum magnetic energy product (calling in the following text " working point ") of the first permanent magnet can change accordingly, and the maximum magnetic energy product of the second permanent magnet remains unchanged.And then the magnetic flux of stator armature winding and back-emf can corresponding changes.
When the first permanent magnet is in maximum magnetic energy product state, and attached magnetic direction is identical with the direction of the second permanent magnet, and the magnetic flux that defining now is provided by the first permanent magnet is positive maximum.When then adopting above-mentioned pulse current to carry out the operation of attached magnetic to the first permanent magnet, the magnetic flux of the first permanent magnet can from forward maximum to maximum negative value within the scope of change, regulate size and the turn-on instant of above-mentioned attached magnetic field impulse current value, the magnetic flux of the first permanent magnet just can be made to change, thus can according to the needs of motor rotation speed, regulate the back emf coefficient of motor flexibly, make motor operate at high efficiency state all the time, the range of speeds of original motor can also be expanded simultaneously.
In addition, according to the rotor of the electric rotating machine of the embodiment of the present invention, following additional technical characteristic can also be had:
According to one embodiment of present invention, described body is provided with multiple magnet groove arranged spaced apart along its circumference, and multiple described magnet groove is relative to the pivot Rotational Symmetry of described body, and each described magnetic pole is located in described magnet groove respectively.
According to one embodiment of present invention, each described magnet groove comprises the first cell body and second cell body of mutual conducting respectively, and described first permanent magnet is located in described first cell body, and described second permanent magnet is located in described second cell body.
According to one embodiment of present invention, described first cell body of each described magnet groove and one end of described second cell body are connected to form respectively as opening is towards described external V-arrangement, and described first cell body of each described magnet groove and the tie point of described second cell body are between the d-axis and quadrature axis of described magnet groove.
According to one embodiment of present invention, formed every magnetic bridge between adjacent two described magnet grooves, described every magnetic bridge relative to the asymmetric setting of quadrature axis between adjacent two described magnet grooves.
According to one embodiment of present invention, the d-axis bearing of trend out of plumb of the direction of magnetization of described second permanent magnet of each described magnetic pole and magnetic pole described in this.
According to one embodiment of present invention, the length of described first permanent magnet is L1, and the length of described second permanent magnet is L2, and the radius of described body is R, L2 >=3L1, and L1+L2>0.8R.
According to one embodiment of present invention, the thickness of described first permanent magnet is more than or equal to the thickness of described second permanent magnet.
According to one embodiment of present invention, described first permanent magnet is 20 DEG C time, and coercive force is less than the SmCo permanent magnet of 500kA/m.
According to an implementation example of the present invention, as described in the second permanent magnet is at 20 ℃, the sintering of the remanence density greater than 1.2 T peng rubidium iron permanent magnet.
According to one embodiment of present invention, described first permanent magnet and described second permanent magnet are integrally formed.
According to one embodiment of present invention, described body is provided with multiple along the spaced apart equally distributed rivet hole of its circumference, and each described rivet hole lays respectively at the inner circumferential of described magnetic pole in the radial direction of described body.
According to one embodiment of present invention, the number of described rivet hole is identical with the number of described magnetic pole, and each described rivet hole is located between two adjacent described magnetic poles respectively.
According to one embodiment of present invention, described body is provided with multiple along the spaced apart equally distributed rotor hole of its circumference, and each described rotor hole lays respectively at the inner circumferential of described magnetic pole in the radial direction of described body.
The permanent magnet motor of embodiment according to a second aspect of the present invention, comprises the rotor of the electric rotating machine according to above-described embodiment.This permanent magnet motor adopts rotary motor rotor of the present invention, original " in-line " permanent magnet rotor is substituted, the back emf coefficient of motor can maintain original level, and there will not be and significantly decline, thus keeps motor within the scope of whole service to possess higher efficiency.Further, along with the dynamic change of magnetic flux, under the prerequisite that electric machine controller busbar voltage is constant, the maximum speed of motor can further improve.
The compressor of embodiment according to a third aspect of the present invention, comprises the permanent magnet motor according to above-described embodiment.Carry the compressor of rotary motor rotor of the present invention, possess higher efficiency and larger range of operation.
The air-conditioning system of embodiment according to a fourth aspect of the present invention, comprises the compressor according to above-described embodiment.Carry the air-conditioning system of compressor of the present invention, possess higher APF efficiency.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the body of the rotor of electric rotating machine according to the embodiment of the present invention;
Fig. 2 is the structural representation of the rotor of electric rotating machine according to the embodiment of the present invention;
Fig. 3 is the structural representation of the permanent magnet motor according to the embodiment of the present invention;
Fig. 4 is the cutaway view of the permanent magnet motor according to the embodiment of the present invention;
Fig. 5 is the magnetic force property figure of the second permanent magnet of the rotor of electric rotating machine according to the embodiment of the present invention.
Fig. 6 is the magnetic force property figure of the first permanent magnet of the rotor of electric rotating machine according to the embodiment of the present invention.
Fig. 7 is the structural representation of permanent magnet rotating electric machine rotor in prior art;
Fig. 8 is the structural representation of permanent magnet rotating electric machine rotor in correlation technique;
Fig. 9 is the counter potential waveform comparison diagram of Fig. 7, Fig. 8 and the rotor according to the electric rotating machine of the embodiment of the present application, wherein, the curve of scheme shown in Fig. 7 is curve A, and the curve of scheme shown in Fig. 8 is curve B, is curve C according to the curve of the rotor of the embodiment of the present application.
Reference numeral:
Rotor 100; Electric rotating machine 200; Stator slot 201; Stator 202;
Body 10; Magnet groove 11; First cell body 111; Second cell body 112; Every magnetic bridge 12; Rivet hole 13; Rotor hole 14;
Magnetic pole 20; First permanent magnet 21; Second permanent magnet 22.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
First the rotor 100 according to the electric rotating machine of the embodiment of the present application is specifically described by reference to the accompanying drawings below.
As shown in Figures 1 to 4, rotor 100 according to the electric rotating machine of the embodiment of the present application comprises body 10, body 10 is provided with multiple magnetic pole 20 arranged spaced apart along its circumference, multiple magnetic pole 20 is relative to the pivot Rotational Symmetry of body 10, each magnetic pole 20 comprises the first permanent magnet 21 and the second permanent magnet 22 respectively, and wherein the coercive force of the second permanent magnet 22 is more than the coercitive twice of the first permanent magnet 21.
In other words, the rotor 100 according to the electric rotating machine of the embodiment of the present application is formed primarily of body 10, and body 10 is rotational symmetry structure, and body 10 is provided with multiple magnetic pole 20, and multiple magnetic pole 20 is also relative to the pivot Rotational Symmetry of body 10.
Each magnetic pole 20 is made up of the first permanent magnet 21 and the second permanent magnet 22 respectively, wherein the coercive force of the second permanent magnet 22 is more than the coercitive twice of the first permanent magnet 21, namely suppose that the coercive force of the first permanent magnet 21 is 250A/m, then the coercive force of the second permanent magnet 22 is at least 500A/m.
In addition, in this application, the number of magnetic pole 20 can be 6, and the number of magnetic pole 20 is 6 is exemplary, and can not be interpreted as limitation of the present invention, the number of magnetic pole 20 also can be 4 or 8.
Thus, according to the rotor 100 of the electric rotating machine of the embodiment of the present invention, when motor rotation, can according to load needs, in motor stator winding inside by the instant pulse current larger than running current, pulse current produces instantaneous high magnetic field intensity on rotor, and the value of magnetic field intensity can more than the irreversible attached magnetic coercive force of the first permanent magnet 21, but the value of magnetic field intensity is lower than the irreversible attached magnetic coercive force of the second permanent magnet 22.Accordingly, the maximum magnetic energy product (calling in the following text " working point ") of the first permanent magnet 21 can change accordingly, and the maximum magnetic energy product of the second permanent magnet 22 remains unchanged.And then the magnetic flux of stator armature winding and back-emf can corresponding changes.
When the first permanent magnet 21 is in maximum magnetic energy product state, and attached magnetic direction is identical with the direction of the second permanent magnet 22, and the magnetic flux that defining now is provided by the first permanent magnet 21 is positive maximum.When then adopting above-mentioned pulse current to carry out the operation of attached magnetic to the first permanent magnet 21, the magnetic flux of the first permanent magnet 21 can change from forward maximum within the scope of maximum negative value, regulate size and the turn-on instant of above-mentioned attached magnetic field impulse current value, the magnetic flux of the first permanent magnet 21 just can be made to change, thus can according to the needs of motor rotation speed, regulate the back emf coefficient of motor flexibly, make motor operate at high efficiency state all the time, the range of speeds of original motor can also be expanded simultaneously.
According to an embodiment of the application, body 10 is provided with multiple magnet groove 11 arranged spaced apart along its circumference, and multiple magnet groove 11 is relative to the pivot Rotational Symmetry of body 10, and each magnetic pole 20 is located in magnet groove 11 respectively.
Particularly, as shown in Figure 1, each magnet groove 11 comprises the first cell body 111 of mutual conducting respectively and the second cell body 112, first permanent magnet 21 is located in the first cell body 111, and the second permanent magnet 22 is located in the second cell body 112.
That is, in this application, multiple magnetic pole 20 is arranged on body 10 respectively by the multiple magnet grooves 11 on body 10, each magnet groove 11 is made up of the first cell body 111 of two mutual conductings and the second cell body 112 respectively, each magnetic pole 20 comprises the first permanent magnet 21 and the second permanent magnet 22 respectively, in the first cell body 111 that first permanent magnet 21 and the second permanent magnet 22 are located at mutual conduction and the second cell body 112, be embedded respectively in different cell bodies compared to two permanent magnets in Patents, reduce manufacture and assembly difficulty.
In some embodiments of the application, first cell body 111 of each magnet groove 11 and one end of the second cell body 112 are connected to form as opening is towards the V-arrangement outside body 10 respectively, and the first cell body 111 of each magnet groove 11 and the tie point of the second cell body 112 are between the d-axis and quadrature axis of magnet groove 11.
As shown in Figure 1, each magnet groove 11 is made up of the first cell body 111 and the second cell body 112, one end of first cell body 111 is connected with one end of the second cell body 112, the other end of the first cell body 111 and the other end of the second cell body 112 separate along the circumference of body 10 the V-shaped structure forming cardinal principle respectively to both sides, the summit of the first cell body 111 and the tie point of the second cell body 112 and the V-shaped structure of magnet groove 11, this summit is positioned at the side of the d-axis deflection quadrature axis of corresponding magnetic pole 20.
Wherein it should be noted that, in this application, to be positioned at the magnetic pole 20 of the top of body 10, the d-axis of this magnetic pole 20 is expressed as d axle in the drawings, the quadrature axis of this magnetic pole 20 is expressed as q axle in the drawings, the d-axis (d axle) of magnetic pole 20 and the definition of quadrature axis (q axle) and position are appreciated that to those skilled in the art and easily realize, and are therefore not described in detail.
That is, in this application, the V-shaped structure of the magnet groove 11 be made up of the first cell body 111 and the second cell body 112 is not relative to the axisymmetric structure of the d of this magnet groove 11, and the q axle of wherein side is partial on the summit of the V-shaped structure of magnet groove 11 relative to d axle.
Preferably, formed every magnetic bridge 12 between adjacent two magnet grooves 11, every magnetic bridge 12 relative to the asymmetric setting of quadrature axis between adjacent two magnet grooves 11.Further, the direction of magnetization of the second permanent magnet 22 of each magnetic pole 20 and the d-axis bearing of trend out of plumb of this magnetic pole 20.
Thus, the more reasonable structure of this rotor 100, dissymmetrical structure can expand the range of speeds of original motor further.
According to an embodiment of the application, the length of the first permanent magnet 21 is L1, and the length of the second permanent magnet 22 is L2, and the radius of body 10 is R, L2 >=3L1, and L1+L2>0.8R.
Particularly, as shown in Figure 4, the length of the first permanent magnet 21 is expressed as L1 in the diagram, the length of the second permanent magnet 22 is expressed as L2 in the diagram, the radius of body 10 is expressed as R in the diagram, and the first permanent magnet 21 and the relation between the second permanent magnet 22 and the radius of body 10 meet L2 >=3L1 and the requirement of L1+L2>0.8R.
Further, the thickness of the first permanent magnet 21 is more than or equal to the thickness of the second permanent magnet 22.
As shown in Figure 4, in the diagram, the thickness of the first permanent magnet 21 is T1, and the thickness of the second permanent magnet 22 is T2, meets the requirement of T1 >=T2 between the first permanent magnet 21 and the second permanent magnet 22.
Thus, first permanent magnet 21 of this structure and the second permanent magnet 22 not only can improve the quality of motor further, and the first permanent magnet 21 and the difference of the second permanent magnet 22 structure comparatively large, when assembling with the first cell body 111 and the second cell body 112, situation about misplacing can not be there is, assemble more convenient.
In some embodiments of the application, body 10 is provided with multiple along the spaced apart equally distributed rivet hole 13 of its circumference, and each rivet hole 13 lays respectively at the inner circumferential of magnetic pole 20 in the radial direction of body 10.Preferably, the number of rivet hole 13 is identical with the number of magnetic pole 20, and each rivet hole 13 is located between two adjacent magnetic poles 20 respectively.
Particularly, as shown in Figure 4, at the lower area of the first permanent magnet 21, along the position of first permanent magnet 21 direction of magnetization, be provided with rivet hole 13, in the present embodiment the quantity of rivet hole 13 and magnetic pole 20 quantity of rotor consistent, under the prerequisite keeping rotor body 10 uniform force, the quantity of rivet hole 13 can also be 3,9 other quantity such as grade, and position also can adjust according to the shape of magnet groove 11 flexibly.
In addition, in this application, body 10 is provided with multiple along the spaced apart equally distributed rotor hole 14 of its circumference, and each rotor hole 14 lays respectively at the inner circumferential of magnetic pole 20 in the radial direction of body 10.
That is, in the region near rotor body 10 internal diameter direction, also have along the symmetrical rotor hole 14 of rotor center, in the present embodiment, quantity and the number of poles of rotor hole 14 are consistent.
According to the application of an example, the first permanent magnets for 21 at 20 ℃, the coercive force is less than 500 ka/m samarium cobalt permanent magnet, optimization, and the second permanent magnet for 22 at 20 ℃, the sintering of the remanence density greater than 1.2 T rubidium iron peng permanent magnets.Further, the first permanent magnet 21 and the second permanent magnet 22 are integrally formed.
Thus, the rotor 100 of this structure can improve the quality of electric rotating machine 200 further, and structural stability is higher, assembles more convenient.
Specifically describe the electric rotating machine 200 according to the embodiment of the present application below.
As shown in Figure 3, specific to the electric rotating machine 200 of the application, the rotor 100 according to above-described embodiment is comprised according to the electric rotating machine 200 of the embodiment of the present application, stator slot 201 number of electric rotating machine 200 is 18, the number of turn of each winding is 62 circles, stator 202 is identical with the thickness of rotor 100, is 40mm.
In this application, when electric rotating machine 200 operates at 1200rpm, now electric rotating machine 200 belongs to low-speed low-load region, needs electric rotating machine 200 to have higher back emf coefficient.Therefore, when suitable when, to motor stator winding inside by the instant pulse current larger than running current, make the value of magnetic field intensity can exceed the irreversible attached magnetic coercive force of above-mentioned first permanent magnet 21, the direction of attached magnetic is consistent with the direction of magnetization of the second permanent magnet 22, thus realizes magnetizing to the first permanent magnet 21, makes the magnetic flux under each magnetic pole 20 reach maximum, now, the magnetic flux that the first permanent magnet 21 provides also reaches maximum.
When electric rotating machine 200 operates at 3600rpm, now electric rotating machine 200 belongs to territory, intermediate speed/intermediate load, needs electric rotating machine 200 to have normal back emf coefficient.Therefore, when suitable when, to motor stator winding inside by the instant pulse current larger than running current, make the value of magnetic field intensity can exceed the irreversible attached magnetic coercive force of above-mentioned first permanent magnet 21, the direction of attached magnetic is contrary with the direction of magnetization before the first permanent magnet 21 current pulse moment, make the first permanent magnet 21 just reach the state that magnetic flux is zero, the back emf coefficient of electric rotating machine 200 is in normal value.Now, the magnetic flux that the first permanent magnet 21 provides is approximately zero.
When electric rotating machine 200 operates at 5400rpm, now electric rotating machine 200 belongs to high-speed high-load region, needs electric rotating machine 200 to have low back emf coefficient.Therefore, when suitable when, to motor stator winding inside by the instant pulse current larger than running current, make the value of magnetic field intensity can exceed the irreversible attached magnetic coercive force of above-mentioned first permanent magnet 21, the direction of attached magnetic is contrary with the direction of magnetization of the second permanent magnet 22, make the first permanent magnet 21 reach the state that magnetic flux is negative maximum, the back emf coefficient of electric rotating machine 200 is in minimum.Now, the magnetic flux that the first permanent magnet 21 provides is negative maximum.
More than just to the first description of permanent magnet 21 under three kinds of typicalnesses, and in real electrical machinery working range, have various specific works rotating speed and load, but can divide with above-mentioned three kinds of working regions, the value of the magnetic flux of the first permanent magnet 21, excursion is also from positive maximum in negative maximum range, and continuous print changes, and does not state to the greatest extent one by one in this application.
The rotor 100 of the application is described below in conjunction with Patents pointed in the background technology of prior art and the application.
Particularly, Fig. 2 is the rotor 100 according to the permanent magnet rotating electric machine described in the application, Figure 7 shows that the rotor of tradition " in-line " built-in permanent magnet rotating electric machine in prior art, Fig. 8 is the rotor according to the permanent magnet rotating electric machine described by patent described in background technology.The number of poles of three kinds of rotors is 6 poles, considers production technology and structural safety, and the width every magnetic bridge of three kinds of rotors is 0.8mm.
Wherein, first permanent magnet 21 of Fig. 2 is samarium cobalt magnet, and remanent magnetism is 1.05T, and coercive force is 230kA/m, and the characteristic curve of magnet as shown in Figure 6.22 for the second permanent magnet sintering rubidium iron peng, grades and the original consistent, "one" glyph rotor magnet characteristic curve as shown in figure 5.The multiple of the coercive force difference of the first permanent magnet 21 and the second permanent magnet 22 is 995/230=4.3 doubly left and right.
In the present embodiment, the thickness of the first permanent magnet 21 is 3.1mm, length is 6mm, the thickness of the second permanent magnet 22 is 2.1mm, length is 18mm, and the external diameter of rotor is similarly 28.9mm, and the thickness of the first permanent magnet 21 is greater than the second permanent magnet 22, the length of the first permanent magnet 21 adds the length of the second permanent magnet 22, have also exceeded 0.8 times of radius.The shape of two blocks of permanent magnets, be similar to and be in the shape of the letter V, and the end points of V word is not also on d axle, is all positioned at the region of q axle side to the left every magnetic bridge, magnet groove also only has a closed region.
Figure 7 "one" glyph, permanent magnet rotor used for the sintering rubidium iron peng, brand for N42SH, the properties of the magnet as shown in figure 5, remanence is 1.29 T, coercive force of 995 ka/m, the rotor's diameter is 28.9 mm.
Fig. 8 is the sectional view of the 6 pole rotors designed by description of Patents pointed in the background technology according to the application, rotor diameter and " in-line " are consistent, the arrangement of magnet is also consistent with aforementioned granted patent, and the material behavior of magnet is consistent with in the present embodiment.
Utilize emulation tool, with identical stator, the rotor of collocation described in Fig. 7 to Fig. 8, the back-emf effective value of the motor calculated under 3000 turns as shown in Figure 9, the effective value of original " in-line " rotor is 150V, adopt the embodiment of the application, also be rotor 100 described in Fig. 2, when first permanent magnet 21 is operated in maximum flux state, the back-emf effective value of motor is 141V, adopt rotor described in Fig. 8, when the first permanent magnet 21 is operated in maximum flux state equally, the back-emf effective value of motor is 114.7V.
The present embodiment rotor 100 is compared with foregoing rotor, and the effective value of winding back emf declines 6%, compare original " in-line " and slightly decline, and this can by making up the optimization of rotor outer rim shape.Adopt Fig. 8 rotor to compare with original " in-line " rotor, winding back emf effective value declines 24%, and the range of decrease is obvious, and be difficult to make up, therefore compare original " in-line " rotor, when low cruise, the torque density of motor can decline, and efficiency reduces.If reach the level of efficiency of original " in-line " rotor, will cost be increased, and cause product competitiveness to decline.
To sum up, obviously can reach a conclusion: when adopting the rotor 100 of permanent magnet rotary electric machine of structure described in the application, compare the rotor structure of previous relevant patents, the back emf coefficient of electric rotating machine 200 is high, torque density is high, and therefore the efficiency of motor is higher.
It should be added that, in the comparative examples of Fig. 2, Fig. 7 and Fig. 8, the number of poles only listing rotor is 6 poles, situation when collocation number of stator slots is 18 groove, but the number of poles of the rotor in the embodiment of the present invention is not limited thereto, when rotor number of poles is such as 2,4,8, during 10,12 other number of poles such as grade, the stator of arbitrary collocation and theoretical other any groove number not conflicting of design of electrical motor, after have employed the implementation method identical with embodiments of the invention, also can reach same beneficial effect.
In addition, the rotor 200 of the permanent magnet rotary electric machine described in the embodiment of the present invention, can be used as the driving motor of the industrial machines such as compressor, air blast, heat pump.
The compressor according to above-described embodiment can be comprised according to the air-conditioning system of the application, owing to comprising the rotor 100 according to the above embodiments of the present application according to the compressor of above-described embodiment, therefore, the air-conditioning system according to the embodiment of the present application also has corresponding technique effect, and namely efficiency is higher.
According to the air-conditioning system of the embodiment of the present invention other form and operation be all known for those of ordinary skills, be not described in detail here.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (17)
1. the rotor of an electric rotating machine, it is characterized in that, comprise: body, described body is provided with multiple magnetic pole arranged spaced apart along its circumference, multiple described magnetic pole is relative to the pivot Rotational Symmetry of described body, each described magnetic pole comprises the first permanent magnet and the second permanent magnet respectively, and the coercive force of wherein said second permanent magnet is more than the coercitive twice of described first permanent magnet.
2. the rotor of electric rotating machine according to claim 1, it is characterized in that, described body is provided with multiple magnet groove arranged spaced apart along its circumference, and multiple described magnet groove is relative to the pivot Rotational Symmetry of described body, and each described magnetic pole is located in described magnet groove respectively.
3. the rotor of electric rotating machine according to claim 2, it is characterized in that, each described magnet groove comprises the first cell body and second cell body of mutual conducting respectively, and described first permanent magnet is located in described first cell body, and described second permanent magnet is located in described second cell body.
4. the rotor of electric rotating machine according to claim 3, it is characterized in that, described first cell body of each described magnet groove and one end of described second cell body are connected to form respectively as opening is towards described external V-arrangement, and described first cell body of each described magnet groove and the tie point of described second cell body are between the d-axis and quadrature axis of described magnet groove.
5. the rotor of electric rotating machine according to claim 3, is characterized in that, is formed every magnetic bridge between adjacent two described magnet grooves, described every magnetic bridge relative to the asymmetric setting of quadrature axis between adjacent two described magnet grooves.
6. the rotor of electric rotating machine according to claim 3, is characterized in that, the d-axis bearing of trend out of plumb of the direction of magnetization of described second permanent magnet of each described magnetic pole and magnetic pole described in this.
7. the rotor of electric rotating machine according to claim 1, is characterized in that, the length of described first permanent magnet is L1, and the length of described second permanent magnet is L2, and the radius of described body is R, L2 >=3L1, and L1+L2>0.8R.
8. the rotor of the electric rotating machine according to any one of claim 1-7, is characterized in that, the thickness of described first permanent magnet is more than or equal to the thickness of described second permanent magnet.
9. the rotor of the electric rotating machine according to any one of claim 1-7, is characterized in that, described first permanent magnet is 20 DEG C time, and coercive force is less than the SmCo permanent magnet of 500kA/m.
10. According to claim 1-7 of any item of the rotation of the motor rotor, its characteristics is described in the second permanent magnet is at 20 ℃, the sintering of the remanence density greater than 1.2 T peng rubidium iron permanent magnet.
11. according to the rotor of the electric rotating machine described in claim 1-7, and it is characterized in that, described first permanent magnet and described second permanent magnet are integrally formed.
The rotor of 12. electric rotating machines according to any one of claim 1-7, it is characterized in that, described body is provided with multiple along the spaced apart equally distributed rivet hole of its circumference, and each described rivet hole lays respectively at the inner circumferential of described magnetic pole in the radial direction of described body.
The rotor of 13. electric rotating machines according to claim 12, is characterized in that, the number of described rivet hole is identical with the number of described magnetic pole, and each described rivet hole is located between two adjacent described magnetic poles respectively.
The rotor of 14. electric rotating machines according to any one of claim 1-7, it is characterized in that, described body is provided with multiple along the spaced apart equally distributed rotor hole of its circumference, and each described rotor hole lays respectively at the inner circumferential of described magnetic pole in the radial direction of described body.
15. 1 kinds of permanent magnet motors, is characterized in that, comprise the rotor of the electric rotating machine according to any one of claim 1-14.
16. 1 kinds of compressors, is characterized in that, comprise according to the permanent magnet motor described in claim 15.
17. 1 kinds of air-conditioning systems, is characterized in that, comprise according to the compressor described in claim 16.
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| CN201510247107.0A CN104836355B (en) | 2015-05-14 | 2015-05-14 | The rotor of electric rotating machine, permanent magnet motor, compressor, air-conditioning system |
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| CN201510247107.0A CN104836355B (en) | 2015-05-14 | 2015-05-14 | The rotor of electric rotating machine, permanent magnet motor, compressor, air-conditioning system |
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| CN105048671A (en) * | 2015-08-19 | 2015-11-11 | 武汉迈信电气技术有限公司 | Asymmetric V-shaped rotor punching sheet and built-in permanent-magnetic motor using the same |
| CN105071570A (en) * | 2015-08-19 | 2015-11-18 | 武汉迈信电气技术有限公司 | V-shaped rotor structure and built-in permanent-magnetism motor with V-shaped rotor structure |
| CN105406626A (en) * | 2015-12-18 | 2016-03-16 | 珠海凌达压缩机有限公司 | Motor rotor and motor |
| CN106558933A (en) * | 2017-01-17 | 2017-04-05 | 广东美芝制冷设备有限公司 | Magneto and the compressor with which |
| CN107317415A (en) * | 2017-07-12 | 2017-11-03 | 中国北方车辆研究所 | A kind of asymmetric permanent magnet machine rotor of V-shape |
| CN107359716A (en) * | 2017-07-12 | 2017-11-17 | 中国北方车辆研究所 | A kind of mixed excitation electric machine rotor |
| EP3327928A1 (en) * | 2016-11-29 | 2018-05-30 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Rotary compressor system, rotary compressor, and motor |
| CN108808910A (en) * | 2018-06-04 | 2018-11-13 | 江苏大学 | A kind of built-in hybrid permanent magnet motor |
| CN109412290A (en) * | 2017-08-15 | 2019-03-01 | 大银微系统股份有限公司 | Permanent magnet motor |
| CN109412294A (en) * | 2018-10-31 | 2019-03-01 | 山东理工大学 | A kind of permanent magnet synchronous motor of electric car Asymmetric V-type magnet steel |
| CN109450133A (en) * | 2018-11-06 | 2019-03-08 | 山东理工大学 | A kind of oblique V-type set magnet permanent synchronization motor of electric car |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105048671A (en) * | 2015-08-19 | 2015-11-11 | 武汉迈信电气技术有限公司 | Asymmetric V-shaped rotor punching sheet and built-in permanent-magnetic motor using the same |
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| EP3327928A1 (en) * | 2016-11-29 | 2018-05-30 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Rotary compressor system, rotary compressor, and motor |
| CN106558933A (en) * | 2017-01-17 | 2017-04-05 | 广东美芝制冷设备有限公司 | Magneto and the compressor with which |
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| CN109412290A (en) * | 2017-08-15 | 2019-03-01 | 大银微系统股份有限公司 | Permanent magnet motor |
| CN108808910A (en) * | 2018-06-04 | 2018-11-13 | 江苏大学 | A kind of built-in hybrid permanent magnet motor |
| CN109412294A (en) * | 2018-10-31 | 2019-03-01 | 山东理工大学 | A kind of permanent magnet synchronous motor of electric car Asymmetric V-type magnet steel |
| CN109412294B (en) * | 2018-10-31 | 2021-06-29 | 山东理工大学 | Permanent magnet synchronous motor of asymmetric V-shaped magnetic steel of electric automobile |
| CN109450133A (en) * | 2018-11-06 | 2019-03-08 | 山东理工大学 | A kind of oblique V-type set magnet permanent synchronization motor of electric car |
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