CN104269986B - Permagnetic synchronous motor and there is its compressor - Google Patents
Permagnetic synchronous motor and there is its compressor Download PDFInfo
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- CN104269986B CN104269986B CN201410539424.5A CN201410539424A CN104269986B CN 104269986 B CN104269986 B CN 104269986B CN 201410539424 A CN201410539424 A CN 201410539424A CN 104269986 B CN104269986 B CN 104269986B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a kind of permagnetic synchronous motor and there is its compressor, described permagnetic synchronous motor includes: stator and rotor, rotor includes rotor core and multiple rotor magnet, rotor core has multiple placing trough, multiple rotor magnets are located in multiple placing trough, being formed with a plurality of slit on rotor core, slit is between corresponding placing trough and the periphery wall of rotor core, and wherein the slit between a d axle and a q axle is distributed in O1On the some concentric circular for the center of circle, put O1And the vertical dimension L between straight line u1Meet: L1≤R-L2/ 2, it is fixed point with the center O of rotor, incites somebody to action a some O1Being line v with the wire definition of the center O of rotor, the angle α of line v and the two d axle meets: α >=270 °/P.Permagnetic synchronous motor according to the present invention, improves air gap magnetic density waveform and counter potential waveform, reducing cogging torque amplitude and load torque fluctuation, being conducive to the reduction of radial electromagnetic force, thus improving the electromagnetic noise of motor.
Description
Technical field
The present invention relates to technical field of motor manufacture, especially relate to a kind of permagnetic synchronous motor and there is its compressor.
Background technology
Pointing out in correlation technique, magneto has the stator being wound with coil and the rotor with permanent magnet.Rotor core is internally provided with placing trough to place permanent magnet.It is generally required to obtain the air-gap field of sineization as far as possible, reduced harmonic, thus obtaining stable torque output and as far as possible little radial electromagnetic force as far as possible so that motor performance is efficient, and vibration noise is low.But, interior permanent magnet machines Magnet is parallel magnetization, is unfavorable for the formation of sineization air-gap field.
Summary of the invention
It is contemplated that at least solve one of technical problem of existence in prior art.For this, it is an object of the present invention to propose a kind of permagnetic synchronous motor, the simple in construction of described permagnetic synchronous motor.
Further object is that a kind of compressor with above-mentioned permagnetic synchronous motor of proposition.
The permagnetic synchronous motor of embodiment according to a first aspect of the present invention, including: stator；And rotor, described rotor includes rotor core and multiple rotor magnet, described rotor core has multiple placing troughs of circumferentially spaced distribution, the plurality of rotor magnet is located in the plurality of placing trough, described rotor core is formed a plurality of slit, described slit is between corresponding described placing trough and the periphery wall of described rotor core, with the center O of described rotor for fixed point, it is a d axle by the wire definition at the center of one of them in the plurality of placing trough Yu the described center O of described rotor, by with in the plurality of placing trough described in the wire definition of described center O of center and described rotor of one of them adjacent described placing trough be the 2nd d axle, the angular bisector of a described d axle and described 2nd d axle is defined as a q axle, a described q axle is defined as the 2nd q axle about a described axisymmetric ray of d, described center O and the straight line vertical with a described d axle of crossing described rotor are defined as straight line u, described slit between a wherein said d axle and a described q axle is distributed in O1On the some concentric circular for the center of circle, described some O1And the vertical dimension L between described straight line u1Meet: L1≤R-L2/ 2, with the described center O of described rotor be fixed point, by described some O1It is line v with the wire definition of the described center O of described rotor, described line v is satisfied with the angle α of described 2nd d axle: α >=270 °/P, wherein, described R be the described center O of described rotor along a described d axle to the periphery wall of described rotor between distance, described L2For the outside of corresponding described placing trough along a described d axle to the periphery wall of described rotor between distance, described P is rotor number of poles.
Permagnetic synchronous motor according to embodiments of the present invention, effectively improves air gap magnetic density waveform, improves counter potential waveform further, reducing cogging torque amplitude and load torque fluctuation, being conducive to the reduction of radial electromagnetic force, thus improving the electromagnetic noise of motor.Meanwhile, by slit being arranged so that the overall shape poly-along d axis congruence of magnetic flux, the output of lifting motor effectively.When permagnetic synchronous motor is applied on the compressor, it is achieved that the low noise of compressor noise and high efficiency.
Alternatively, described some O1It is positioned on described 2nd q axle.
Alternatively, having a plurality of described slit between a described d axle and a described q axle, the adjacent distance between two described slits is all equal.
Preferably, the described slit between the periphery wall of described rotor and corresponding described placing trough is symmetrical about the center of corresponding described placing trough and the line of the described center O of described rotor.
Specifically, every described slit is made up of straightway and/or curved section.
Alternatively, every described slit is circular shape.
Or alternatively, every described slit is formed by one or more snippets straightway matching.
Alternatively, described rotor core is formed by multiple rotor punchings are stacked, and wherein the width of each described slit is more than the thickness of corresponding described rotor punching.
Alternatively, the bar number of the described slit between each described placing trough and the periphery wall of described rotor is n, and described n meets: n >=4.
The compressor of embodiment according to a second aspect of the present invention, including the permagnetic synchronous motor according to the above-mentioned first aspect embodiment of the present invention.
The additional aspect of the present invention and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the schematic diagram of permagnetic synchronous motor according to an embodiment of the invention, and wherein rotor number of poles is 4；
Fig. 2 is the schematic diagram of the rotor shown in Fig. 1；
Fig. 3 a and Fig. 3 b is the partial schematic diagram of the rotor with difform gap；
Fig. 4 is another schematic diagram of the rotor shown in Fig. 1；
Fig. 5 is the air gap magnetic density waveform the adopting permagnetic synchronous motor according to embodiments of the present invention variation diagram with gap bar number n；
Fig. 6 is the back emf waveform the adopting permagnetic synchronous motor according to embodiments of the present invention variation diagram with gap bar number n；
Fig. 7 is the cogging torque amplitude the adopting permagnetic synchronous motor according to embodiments of the present invention variation diagram with gap bar number n；
Fig. 8 is the schematic diagram of permagnetic synchronous motor in accordance with another embodiment of the present invention, and wherein rotor number of poles is 6；
Fig. 9 is the schematic diagram of the rotor shown in Fig. 8；
Figure 10 is the longitudinal sectional drawing of compressor according to embodiments of the present invention.
Accompanying drawing labelling:
100: permagnetic synchronous motor；
1: stator；11: stator core；111: stator slot；12: stator winding；
2: rotor；21: rotor core；211: placing trough；212: slit；22: rotor magnet；
31: the one d axles；32: the two d axles；33: the one q axles；34: the two q axles；
200: compressor；
201: housing；202: cylinder；2021: compression chamber；203: base bearing；204: supplementary bearing；
205: piston；206: bent axle；2061: eccentric part.
Detailed description of the invention
Being 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 the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more these features.In describing the invention, except as otherwise noted, " multiple " are meant that two or more.
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals.For the ordinary skill in the art, it is possible to concrete condition understands above-mentioned term concrete meaning in the present invention.
The permagnetic synchronous motor 100 of embodiment according to a first aspect of the present invention is described below with reference to Fig. 1-Fig. 9.
As illustrated in figures 1 and 8, the permagnetic synchronous motor 100 of embodiment according to a first aspect of the present invention, including stator 1 and rotor 2.Wherein, stator 1 is arranged in outside rotor 2.
Stator 1 includes stator core 11 and the stator winding 12 being wrapped on stator core 11.With reference to Fig. 1 and Fig. 8, stator core 11 is formed the centre bore for holding rotor 2 and the multiple stator slots 111 connected with centre bore, multiple stator slots 111 are uniformly distributed in the circumference of stator core 11, and stator winding 12 is wrapped on stator core 11 through multiple stator slots 111.
It is appreciated that the number of stator slot 111 specifically can be arranged according to actual requirement, for instance, illustrate six stator slots 111 in the example of fig. 1, illustrate nine stator slots 111 in the example of fig. 8, but be not limited to this.
Rotor 2 includes rotor core 21 and multiple rotor magnet 22, rotor core 21 has multiple placing troughs 211 of circumferentially spaced distribution, multiple placing troughs 211 are preferably uniformly distributed along the circumference of rotor core 21, multiple rotor magnets 22 are located in multiple placing trough 211, as it is shown in figure 1, be mounted on a rotor magnet 22 in each placing trough 211.Wherein, each rotor magnet 22 is permanent magnet.After permagnetic synchronous motor 100 energising, the magnetic field of permanent magnet of rotor 2 and stator winding 12 magnetic field interaction produce electromagnetic force so that rotor 2 rotates.
Wherein, being formed with a plurality of slit 212 on rotor core 21, slit 212 is elongated shape, and radially extending substantially along rotor core 21, slit 212 is between corresponding placing trough 211 and the periphery wall of rotor core 21, and now slit 212 is positioned at the outside of placing trough 211.It should be noted that slit 212 is the slot apertures of narrow elongate.
As shown in Figure 2, with the center O of rotor 2 for fixed point, by one of them in multiple placing troughs 211 (such as, the placing trough 211 of the top in Fig. 2) the wire definition of center O of center and rotor 2 be a d axle 31, by with one of them the adjacent placing trough 211 above-mentioned in multiple placing troughs 211 (such as, the placing trough 211 on right side in Fig. 2) the wire definition of center O of center and rotor 2 be the 2nd d axle 32, the angular bisector of the oneth d axle 31 and the 2nd d axle 32 is defined as a q axle 33, oneth q axle 33 is defined as the 2nd q axle 34 about the ray of d axle 31 symmetry.Wherein, d axle the 31, the 2nd d axle the 32, an oneth q axle 33 and the 2nd q axle 34 are the center O with rotor 2 is the ray pinpointed.Here, it is necessary to explanation, d axle, q axle definition etc. known by those skilled in the art, be not detailed herein.
Wherein, the slit 212 between a d axle 31 and a q axle 33 is distributed in O1On the some concentric circular for the center of circle.Here following two situation is included: the first, the slit 212 between a d axle 31 and a q axle 33 is one article；The second, the slit 212 between a d axle 31 and a q axle 33 is a plurality of, namely two or more.
In the first case described above, the above-mentioned one article of slit 212 between a d axle 31 and a q axle 33 is positioned at O1On the some circle for the center of circle.In the latter case, a plurality of slit 212 between a d axle 31 and a q axle 33 lays respectively at O1On the some concentric circular for the center of circle, in other words, a plurality of slit 212 is positioned at O1On multiple circles that point is the center of circle, radius is different.It is appreciated that with O1Point specifically can be selected according to actual requirement for the concrete radius of the circle in the center of circle, and this is not made particular determination by the present invention.
Every slit 212 is arc-shaped or matching line segment shape, and namely slit 212 can substantially by arc-shaped distribution, it would however also be possible to employ the mode of straight line or curve matching circular arc, thus realizing the rationalization of magnetic circuit.
Specifically, every slit 212 can be made up of straightway and/or curved section, say, that every slit 212 can be made up of such as matching and form one or more snippets straightway, can also be made up of one or more snippets curved section, or the combination that every slit 212 is straightway and curved section.It is to be appreciated that no matter how the concrete shape of slit 212 is constituted, the shape of every slit 212 should be substantially the same with the arc-shaped profile of the circle at its place.
Further, every slit 212 is one or more in the shape such as straightway, arc, and fitted shapes trend is substantially by arc-shaped distribution.Such as in the example of Fig. 3 a, every slit 212 is circular shape.Such as in the example of Fig. 3 b, every slit 212 adopts straight line section matching circular arc, it can be seen that its effect is similar to circular arc.
Point O1And the vertical dimension L between straight line u1Meet:
L1≤R-L2/2
Wherein, straight line u was the center O of rotor 2 and the straight line vertical with a d axle 31, and R is the center O of rotor 2 distance arriving between the periphery wall of rotor 2 along a d axle 31, L2For the outside of corresponding placing trough 211 along a d axle 31 to the periphery wall of rotor 2 between distance.Here, it is necessary to explanation, when the periphery of rotor 2 is completely circular structure, being a complete circle, R is the radius of rotor 2；On the direction parallel with a d axle 31, L2For the ultimate range between outside and the periphery wall of rotor 2 of corresponding placing trough 211.
It is appreciated that and present disclosure applies equally to the permagnetic synchronous motor 100 that rotor 2 periphery is non-completely circular structure.Here, it is necessary to explanation, rotor 2 periphery is preferably completely circular structure, thus, has better manufacturing, it may have less wind moussing loss, such that it is able to further lifting motor efficiency.
The angle α of line v and the two d axle 32 meets:
α≥270°/P
Wherein, it is fixed point with the center O of rotor 2, incites somebody to action a some O1Being line v with the wire definition of the center O of rotor 2, line v is with ray that the center O of rotor 2 is fixed point.P is rotor 2 number of poles.It should be noted that the generation type of slit 212 between the generation type of the slit 212 of other position and a d axle 31 and a q axle 33 shown in Fig. 2 is identical on rotor core 21, repeat no more here.
With reference to Fig. 1 and in conjunction with Fig. 2-Fig. 4, rotor number of poles P=4, and the 2nd d axle 32 overlaps with straight line u.Every slit 212 between oneth d axle 31 and a q axle 33 is substantially by with an O1Arc-shaped for the center of circle is distributed, by P=4 it can be seen that put O1The angle α of line v and the two d axle 32 to rotor 2 center O meets α >=67.5 ° and some O1Vertical dimension L to straight line u1Meet L1≤R-L2/ 2, now every slit 212 is generally directed away from the arc-shaped that the d direction of principal axis of correspondence protrudes.Thus, setting while slit 212 global shape, it is ensured that slit 212, approximately along rotor 2 radial distribution, ensures that magnetic circuit is towards rotor magnetic pole center convergence simultaneously.
With reference to Fig. 8 misaligned with straight line u in conjunction with Fig. 9, rotor number of poles P=6, the 2nd d axle 32.Every slit 212 between oneth d axle 31 and a q axle 33 is substantially by with an O1Arc-shaped for the center of circle is distributed, by P=6 it can be seen that put O1The angle α of line v and the two d axle 32 to rotor 2 center O meets α >=45 ° and some O1Vertical dimension L to straight line u1Meet L1≤R-L2/ 2, now every slit 212 is generally directed away from the arc-shaped that the d direction of principal axis of correspondence protrudes.
Thus, the suitability of the structure of permagnetic synchronous motor 100 according to embodiments of the present invention is wide, can be applicable to the IPM synchronous motor 100 of the various numbers of poles such as 4 poles, 6 poles.
Fig. 5 is the air gap magnetic density waveform variation diagram with slit bar number n of the permagnetic synchronous motor 100 of the application embodiment of the present invention.From figure 5 it can be seen that when slit bar number n is relatively low, air gap magnetic density waveform distortion is big；And along with slit bar number n is more big, air gap magnetic density waveform sine degree is more good.Wherein, n is the bar number of the slit 212 between each placing trough 211 and the periphery wall of rotor 2, i.e. each magnetic pole slit number, for instance in the figure 2 example, n=10.
Fig. 6 is the back emf waveform variation diagram with slit bar number n of the permagnetic synchronous motor 100 of the application embodiment of the present invention.From fig. 6 it can be seen that when slit bar number n is relatively low, back emf waveform distortion is big；And along with slit bar number n is more big, back emf waveform sine degree is more good.Especially, when n >=4, back emf waveform is improved better.
Fig. 7 is the cogging torque amplitude variation diagram with slit bar number n of the permagnetic synchronous motor 100 of the application embodiment of the present invention.It can be seen from figure 7 that as slit bar number n < 4, cogging torque amplitude is bigger；When n >=4, clearly, this is very favorable for improving electromagnetic noise to cogging torque amplitude reducing effect.
Comprehensive air gap magnetic density waveform, counter potential waveform and cogging torque amplitude are with the variation tendency of slit bar number n, and the present invention chooses slit bar number n >=4 between each placing trough 211 and the periphery wall of rotor 2.Being appreciated that the concrete numerical value of slit bar number n specifically can be arranged according to actual requirement, this is not especially limited by the present invention.
Permagnetic synchronous motor 100 according to embodiments of the present invention, effectively improves air gap magnetic density waveform, improves counter potential waveform further, reducing cogging torque amplitude and load torque fluctuation, being conducive to the reduction of radial electromagnetic force, thus improving the electromagnetic noise of motor.Meanwhile, by slit 212 being arranged so that the overall shape poly-along d axis congruence of magnetic flux, the output of lifting motor effectively.When permagnetic synchronous motor 100 is applied on compressor 200, it is achieved that the low noise of compressor 200 noise and high efficiency.
According to one embodiment of present invention, having a plurality of slit 212 between a d axle 31 and a q axle 33, the adjacent distance between two slits 212 is all equal.As shown in Figure 3 a and Figure 3 b shows, between oneth d axle 31 and a q axle 33, there are five articles of slits 212, article five, the radius of slit 212 is followed successively by R1, R2, R3, R4, R5 from small to large, and R1, R2, R3, R4, R5 substantially meet following relation: R2-R1=R3-R2=R4-R3=R5-R4.Thereby it is ensured that adjacent slots 212 is substantially distributed equally spacedly, such that it is able to improve the performance of permagnetic synchronous motor 100 further, reduce vibration noise.
As shown in Figure 4, some O1It is positioned on the 2nd q axle 34, forms the slit 212 optimizing magnetic circuit further, and while improving noise further, it is provided that higher output.
Preferably, the slit 212 between the periphery wall of rotor 2 and corresponding placing trough 211 is symmetrical about the center of corresponding placing trough 211 and the line of the center O of rotor 2, say, that slit 212 is symmetrical along magnetic pole center line.Thus, the sineization of air gap magnetic density waveform is further ensured.
With reference to Fig. 2, Fig. 4 and Fig. 9, a plurality of slit 212 between a placing trough 211 and the periphery wall of rotor 2 is symmetrical about the center of this placing trough 211 and the line of the center O of rotor 2.Such as, as shown in Figure 2 and Figure 4, ten slits 212 between placing trough 211 and the periphery wall of rotor 2 of the top are symmetrical, and specifically, the five articles of slits 212 on the left of a d axle 31 and five articles of slits 212 on the right side of it are symmetrical about a d axle 31.
Alternatively, rotor core 21 is formed by multiple rotor 2 punching (not shown go out) is stacked, and wherein the width of each slit 212 is more than the thickness of corresponding rotor 2 punching.Wherein, multiple rotor 2 punching preferred thickness are equal.Thus, ensureing that slit 212 air gap is effectively while magnetic, be also beneficial to the manufacture processing of rotor 2.
Permagnetic synchronous motor 100 according to embodiments of the present invention, the simple in construction of permagnetic synchronous motor 100, performance efficiency, and noise is low.
As shown in Figure 10, the compressor 200 of embodiment according to a second aspect of the present invention, including the permagnetic synchronous motor 100 according to the above-mentioned first aspect embodiment of the present invention.Wherein, compressor 200 can be single cylinder or multicylinder compressor.
Such as in the example of Figure 10, compressor 200 also includes housing 201 and compression mechanism, permagnetic synchronous motor 100 and compression mechanism and is contained in housing 201, and permagnetic synchronous motor 100 is setting up and down with compression mechanism.Specifically, compression mechanism includes cylinder 202, base bearing 203, supplementary bearing 204, bent axle 206, piston 205 and slide plate (not shown go out), base bearing 203 is located at the top of cylinder 202, and supplementary bearing 204 is located at the bottom of cylinder 202, base bearing 203, supplementary bearing 204 and cylinder 202 limit compression chamber 2021 jointly, piston 205 is located at interior and along compression chamber 2021 the inwall of compression chamber 2021 and can roll, cylinder 202 is formed with vane slot, slide plate is movably arranged in vane slot, the periphery wall of the inner of slide plate and piston 205 only supports, the upper end of bent axle 206 is fixing with the rotor 2 of permagnetic synchronous motor 100, the lower end of bent axle 206 is stretched in compression chamber 2021 through base bearing 203, bent axle 206 has eccentric part 2061, eccentric part 2061 is positioned at compression chamber 2021 and is set in piston 205 thereon rotates to drive.Thus, when compressor 200 works, it is possible to the coolant entered in compression chamber 2021 is compressed.
Compressor 200 according to embodiments of the present invention, by adopting the permagnetic synchronous motor 100 according to the above-mentioned first aspect embodiment of the present invention, it is possible to promote the performance of compressor 200, reduces the noise of compressor 200.
Other compositions of compressor 200 according to embodiments of the present invention wait and operation is all known to those skilled in the art, are not detailed herein.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: these embodiments can being carried out multiple change, amendment, replacement and modification when without departing from principles of the invention and objective, the scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. a permagnetic synchronous motor, it is characterised in that including:
Stator；With
Rotor, described rotor includes rotor core and multiple rotor magnet, described rotor core has multiple placing troughs of circumferentially spaced distribution, the plurality of rotor magnet is located in the plurality of placing trough, described rotor core is formed a plurality of slit, described slit is between corresponding described placing trough and the periphery wall of described rotor core
With the center O of described rotor for fixed point, it is a d axle by the wire definition at the center of one of them in the plurality of placing trough Yu the described center O of described rotor, by with in the plurality of placing trough described in the wire definition of described center O of center and described rotor of one of them adjacent described placing trough be the 2nd d axle, the angular bisector of a described d axle and described 2nd d axle is defined as a q axle, a described q axle is defined as the 2nd q axle about a described axisymmetric ray of d
Described center O and the straight line vertical with a described d axle of crossing described rotor are defined as straight line u,
Described slit between a wherein said d axle and a described q axle is distributed in O1On the some concentric circular for the center of circle, described some O1And the vertical dimension L between described straight line u1Meet: L1≤R-L2/ 2,
With the described center O of described rotor be fixed point, by described some O1Being line v with the wire definition of the described center O of described rotor, described line v is satisfied with the angle α of described 2nd d axle: α >=270 °/P,
Wherein, described R be the described center O of described rotor along a described d axle to the periphery wall of described rotor between distance, described L2For the outside of corresponding described placing trough along a described d axle to the periphery wall of described rotor between distance, described P is rotor number of poles.
2. permagnetic synchronous motor according to claim 1, it is characterised in that described some O1It is positioned on described 2nd q axle.
3. permagnetic synchronous motor according to claim 1 and 2, it is characterised in that having a plurality of described slit between a described d axle and a described q axle, the adjacent distance between two described slits is all equal.
4. permagnetic synchronous motor according to claim 1, it is characterised in that the described slit between the periphery wall of described rotor and corresponding described placing trough is symmetrical about the center of corresponding described placing trough and the line of the described center O of described rotor.
5. permagnetic synchronous motor according to claim 1, it is characterised in that every described slit is made up of straightway and/or curved section.
6. permagnetic synchronous motor according to claim 5, it is characterised in that every described slit is circular shape.
7. permagnetic synchronous motor according to claim 5, it is characterised in that every described slit is formed by one or more snippets straightway matching.
8. permagnetic synchronous motor according to claim 1, it is characterised in that described rotor core is formed by multiple rotor punchings are stacked, wherein the width of each described slit is more than the thickness of corresponding described rotor punching.
9. permagnetic synchronous motor according to claim 1, it is characterised in that the bar number of the described slit between each described placing trough and the periphery wall of described rotor is n, described n meets: n >=4.
10. a compressor, it is characterised in that include the permagnetic synchronous motor according to any one of claim 1-9.
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| CN201410539424.5A CN104269986B (en) | 2014-10-13 | 2014-10-13 | Permagnetic synchronous motor and there is its compressor |
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| CN201410539424.5A CN104269986B (en) | 2014-10-13 | 2014-10-13 | Permagnetic synchronous motor and there is its compressor |
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| CN104269986B true CN104269986B (en) | 2016-06-29 |
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| CN106505753B (en) * | 2016-11-22 | 2019-09-06 | 广东美芝制冷设备有限公司 | Compressor and its motor |
| US10432043B2 (en) * | 2016-12-16 | 2019-10-01 | Ford Global Technologies, Llc | Slotted rotor-bridge for electrical machines |
| CN107181341B (en) * | 2017-06-30 | 2023-05-16 | 广东美芝制冷设备有限公司 | Permanent magnet motor for compressor and compressor with same |
| CN107317416A (en) * | 2017-08-22 | 2017-11-03 | 广东美芝制冷设备有限公司 | rotor, motor and compressor |
| WO2019198138A1 (en) * | 2018-04-10 | 2019-10-17 | 三菱電機株式会社 | Electric motor, compressor, and air conditioning device |
| CN112436625B (en) * | 2019-08-26 | 2022-05-24 | 安徽美芝精密制造有限公司 | Rotor, motor, compressor and refrigeration plant |
| CN112436628B (en) * | 2019-08-26 | 2021-10-22 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
| CN114498984B (en) * | 2019-08-26 | 2023-08-04 | 安徽美芝精密制造有限公司 | Rotor, motor, compressor and refrigeration equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4248984B2 (en) * | 2003-09-19 | 2009-04-02 | 東芝キヤリア株式会社 | Permanent magnet motor |
| JP5259934B2 (en) * | 2006-07-20 | 2013-08-07 | 株式会社日立産機システム | Permanent magnet type rotating electric machine and compressor using the same |
| JP4964291B2 (en) * | 2009-12-01 | 2012-06-27 | 三菱電機株式会社 | Rotor, blower and compressor of embedded permanent magnet motor |
| WO2014068655A1 (en) * | 2012-10-30 | 2014-05-08 | 三菱電機株式会社 | Electric motor with embedded permanent magnet, and refrigeration and air conditioning equipment equipped with same |
| CN105247764B (en) * | 2013-06-12 | 2018-05-22 | 三菱电机株式会社 | Permanent magnetic baried type motor and compressor |
| CN204145240U (en) * | 2014-10-13 | 2015-02-04 | 广东美芝制冷设备有限公司 | Permagnetic synchronous motor and there is its compressor |
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