CN100349359C - Self-start permanent magnet synchronous motor rotor structure - Google Patents
Self-start permanent magnet synchronous motor rotor structure Download PDFInfo
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- CN100349359C CN100349359C CNB031540600A CN03154060A CN100349359C CN 100349359 C CN100349359 C CN 100349359C CN B031540600 A CNB031540600 A CN B031540600A CN 03154060 A CN03154060 A CN 03154060A CN 100349359 C CN100349359 C CN 100349359C
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Abstract
The present invention relates to a self-start rotor structure of a permanent magnet synchronous motor, which comprises a shaft center four fan-shaped main magnetic poles, four permanent magnets, a plurality of conductor containing grooves and four dents, wherein the surface circular arcs of the four fan-shaped main magnetic poles are first magnetic surface eccentric circular arcs of which the central points are four first eccentric points O1 which are biased from the central point O of a rotor by a bias length of OSI; moreover, the first magnetic surface eccentric circular arcs enable a maximal air gap width T to be approximately two or five times of that of a minimal air gap width t1. The four permanent magnets are respectively arranged in the inner circle of each of the four fan-shaped main magnetic poles. The conductor containing grooves are used for forming a squirrel cage winding, are in a pear shape, and are respectively and annularly arranged in each of the fan-shaped main magnetic poles of the outer circle of the rotor at regular intervals aiming at the direction of each of the first eccentric points O1. The four dents are respectively arranged on middle points of the first magnetic surface eccentric circular arc of the fan-shaped main magnetic poles.
Description
Technical field
The invention relates to a kind of permanent magnet of start type voluntarily (LSPM, line start permanent magnet) syncmotor rotor structure (or abbreviating start type permanent magnet synchronous motor voluntarily as) especially a kind ofly combines the combined type motor (hybrid type motor) of the advantage of induction motor and syncmotor and can reduce cogging torque and improve the permanent magnet synchronous motor of the start type voluntarily rotor structure of starting characteristic.
Background technology
The common permanent magnet synchronous motor of start type voluntarily is a kind of combined type motor, its stator structure is identical with the stator structure of alternating current impression motor (AC induction motor) or AC synchronous motor (AC synchronous motor), but its rotor structure then combines the permanent magnet structure in the rotor of mouse cage (Squirrel cage) structure in the rotor of alternating current impression motor and AC permanent-magnet syncmotor (AC permanent magnet synchronous motor).The permanent magnet synchronous motor of start type voluntarily of this combined type its stator is connected AC power make produce rotating magnetic field (rotatingmagnetic field) after, can utilize the cage-shaped structure in its rotor to respond to and the induced current that produces and produce and start torsion (starting torque) and start in the rotating magnetic field that produces via stator, reach the rotating speed of the rotating magnetic field that is produced with stator winding when identical up to the rotating speed of its rotor, that is motor rotor is when arriving synchronous speed (synchronousspeed), induced current on the mouse cage of rotor promptly disappears, rotor no longer mat cage-shaped structure produces torsion, and produces torsion by the rotating magnetic field reciprocation that its epitrochanterian permanent magnet and stator winding produced fully.Because the material of permanent magnet and magnetic energy product (magnetic energy product) constantly promote, make that the start type permanent magnet synchronous motor can obtain high running efficiency (operation efficiency) when rotation synchronously voluntarily in recent years.Yet, common permanent magnet synchronous motor is because after using the permanent magnet of high energy product, its cogging torque (cogging torque) often becomes very big, be easy to generate the running noise and vibration, therefore all use skewed stator slot (skew) to improve this shortcoming usually, but also therefore can make the coiling work of stator become difficult, and increase the cost of manufacture of motor.
In common technique, be illustrated in figure 1 as U.S. Pat 5,952,757, Boyd et al., the permanent magnet in its rotor are the outsides that is arranged at the conductor storage tank of mouse cage, but because of the number of the conductor storage tank of the number of its permanent magnet that uses and mouse cage as many, so not only the assembling of permanent magnet is complicated, and very easily produce bigger cogging torque.
In common technique, be illustrated in figure 2 as U.S. Pat 5,097,166, Mikulic, the permanent magnet of its rotor are the inboards that is arranged at the conductor storage tank of mouse cage, but because of its rotor is circular, so the noise and vibration of the cogging torque of motor when turning round is all bigger.
In common technique, be illustrated in figure 3 as U.S. Pat 4,922,152, Gleghorn et al., because the permanent magnet of its adjacent two interpolars extends to the nearly circumference of rotor core place, so the permanent magnet of this two interpolar must be positioned in the permanent magnet storage tank before the mouse cage die casting manufacturing of rotor in advance, therefore also can be because permanent magnet can't be high temperature resistant the time, very easily in the die casting manufacture process, producing the demagnetization phenomenon.
In common technique, be illustrated in figure 4 as U.S. Pat 4,748,359, Yahara et al., it is to utilize the profile of adjusting permanent magnet to improve the cogging torque of motor, but cage-shaped structure is not set, so just can't not start voluntarily by other device if having.
In common technique, be illustrated in figure 5 as U.S. Pat 4,358,696, Liu et al. is the permanent magnet that utilizes two groups of balanced configurations constituting four magnetic poles, but it also has permanent magnet to extend to the nearly circumference of rotor core place.Therefore therefore, as described above, permanent magnet must be positioned in the permanent magnet storage tank before the cage-shaped structure die casting manufacturing of rotor in advance, also can be because permanent magnet can't be high temperature resistant the time, very easily in produce the demagnetization phenomenon in the die casting manufacture process.
In common technique, be illustrated in figure 6 as U.S. Pat 4,139,790 permanent magnet is the inboard of conductor storage tank that is arranged at the mouse cage of rotor, but its rotor is circular, so the noise and vibration of the cogging torque of motor when turning round is all bigger.
In common technique, TaiWan, China patent TW 371 as shown in Figure 7,126, the 5th figure embodiment in people such as Kang Jihong " magneto induction synchronous motor rotor structure improvement () ", and TaiWan, China patent TW362 as shown in Figure 8,843, the 3rd figure embodiment in people such as Kang Jihong " magneto induction synchronous motor rotor structure improvement (two) ", in these two existing patents, its rotor center to rotor surface is to be not equidistant, and its rotor surface is that to adopt general round rotor be little radius of curvature, but in its patent specification and undeclaredly how to constitute this rotor surface with this less radius.TW 371 in addition, 126 its permanent magnet storage tanks are not the radial direction according to rotor core, and the outer end of storage tank extends to the nearly circumference of rotor core place, and its TW 371,126 permanent magnet second storage tank is the radial direction setting towards rotor core, and also extends to the nearly circumference of rotor core place.The making of general cage-shaped structure is that whole motor rotor iron core is placed in the compression mod, the liquid aluminium that Rong is melted (aluminum) pours into that (Lv De Rong point is 268 ℃ in the conductor storage tank then) form conductor bar (conductor bar), also constitute end ring (end ring) with liquid aluminium in addition in motor rotor two ends unshakable in one's determination, this end ring closely pastes mutually with the rotor core two ends, and the conducting that is connected with each conductor bar in the rotor core, to constitute whole cage-shaped structure.The technical characterictic of aforementioned TW 371126 and TW 362843, because its permanent magnet storage tank all extends to the nearly circumference of rotor core place, but the conductor storage tank of mouse cage also is set simultaneously in the periphery at nearly circumference place all because of its rotor structure, therefore must before the cage-shaped structure of making rotor, place permanent magnet in advance, just can carry out the die casting manufacturing of the cage-shaped structure of rotor.The rare-earth permanent magnet of general high energy product, its permanent demagnetization (demagnetization) temperature is neither and 200 ℃, if be positioned in the rotor permanent magnet storage tank in advance, very easily produces the demagnetization phenomenon in the die casting manufacture process.And in common technique, U.S. Pat 4,358,696 as shown in Figure 5, Liu et al., it also has the implementation method similar to TW 371126 or TW 362843, so the shortcoming that can produce the demagnetization phenomenon is also arranged.
In common technique, be illustrated in figure 9 as the Japan Patent spy and open 2003-23740 (P2003-23740A), according to handsome " the magneto rotor of permanent magnet motor " in mountain.In this existing patent, its each magnetic pole inboard all correspondence is provided with a permanent magnet, and the rotor magnetic surface only to describe it be by from rotor center maximum distance apart and the place is linked to be between the magnetic pole of rotor center minimum range camber line, be to belong to which kind of curve to there is no explanation on earth as for this camber line.In addition, this prior art does not have any main pole magnetic flux that can make motor that is provided with yet and weakens, and making the transient state when stopping to starting operation of start type permanent magnet synchronous motor voluntarily, the self-holding torque that is caused by motor main pole magnetic flux is reduced, and the starting characteristic of motor is improved.More and, this existing patent is not provided with cage-shaped structure, so just can't not start voluntarily by other device if having.
Summary of the invention
At the shortcoming of the above prior art, the invention provides a kind of permanent magnet synchronous motor of start type voluntarily rotor structure, to be used for improveing the shortcoming in some prior art at least or to provide the substitute of usefulness.
One of purpose of the present invention is to be covered by in the first embodiment of the present invention, it is to be to utilize to cooperate in the permanent magnet synchronous motor of start type voluntarily that has the combined type motor four fan-shaped main poles are provided, the central angle of its each fan-shaped main pole is 90 degree, and its surperficial circular arc is one first magnetic surface eccentric arc, its central point is for from this centre of rotor point O with the offset lengths being four the first eccentric point O1 that the OS1 biasing comes, and its radius respectively is R1, so just like relational expression, R-R1=OS1 makes the air gap of motor constitute a gradual uneven thickness distribution.The length of its biasing and radius then can adjust cooperation, make in the thickness range variation of motor air-gap, and its maximum air gap thickness T is two to five times of minimal air gap thickness t 1, that is T=2t1 ~ 5t1.Thereby the radial component that makes the magnetic flux density of motor air-gap becomes and is in close proximity to sinusoidal wave distribution, and the cogging torque (cogging torque) of motor is further reduced, and the noise and vibration when reducing motor running.Owing to adopt the first magnetic surface eccentric arc, so when motor load increases, even increase is followed in the magnetic field that stator winding constituted, but, still have effectively to weaken demagnetization (demagnetization) caused in stator winding magnetic field to permanent magnet influence because of the air gap at each fan-shaped main pole two ends is bigger.
Another object of the present invention also is to be covered by the first embodiment of the present invention, it is that a plurality of conductor storage tanks of providing shape to resemble a pear in shape are provided, be used for forming the mouse cage winding, its each conductor storage tank is all equidistant with the first eccentric point O1, and be to arrange in the form of a ring and equidistantly with the direction of aiming at each first eccentric point O1 and be disposed in each this fan-shaped main pole of this outer ring of this rotor, and therebetween apart from the place and form the rotor tooth portion be outstanding shape, it is positioned at spacing (rotor tooth portion) between per two fan-shaped main poles, and then the spacing of the storage tank in the middle of fan-shaped is little than each.
Another purpose of the present invention also is to be covered by in the first embodiment of the present invention, it is to be to cooperate simultaneously each first magnetic surface eccentric arc intermediate point place that the semicircle depression of diameter near motor stator tooth portion width is set, the main pole magnetic flux of motor is weakened, and make the transient state when stopping to starting operation of start type permanent magnet synchronous motor voluntarily, the self-holding torque (self-retaining torque) that is caused by motor main pole magnetic flux is reduced, thereby the starting characteristic of motor is improved.
A further object of the present invention is to be covered by in the second embodiment of the present invention, it is that the number that is a plurality of conductor storage tanks of its each this fan-shaped main pole is when being even number, except the locational depression of tooth portion of this rotor, the depression of a same size is set respectively again on the adjacent tooth portion position, its left and right sides; And when each when the number of most conductor storage tanks of this fan-shaped main pole is odd number, except the locational depression of conductor storage tank of this rotor, the depression of one same size respectively is set again on the adjacent conductor storage tank position, its left and right sides, so each fan-shaped main pole respectively has three depressions, be provided with 12 depressions altogether on this rotor altogether, the self-holding torque that causes by motor main pole magnetic flux in order to further minimizing, and further improve the starting characteristic of motor.
A more purpose of the present invention is to be covered by in the third embodiment of the present invention, and it is to be that it further replaces above-described semicircle depression with the second level and smooth magnetic surface eccentric arc curve.The method can make the magnetic flux density radial distribution value of motor air-gap, near near the intermediate point place of each first magnetic surface eccentric arc, reduced, so can further reduce the cogging torque of motor, noise and vibration when reducing motor running, and weaken the main pole magnetic flux of motor a little, make the self-holding torque that magnetic flux caused of the fan-shaped main pole that " transient state " when stopping to starting operation of start type permanent magnet synchronous motor voluntarily can Yin Mada and reduce, thereby can improve the starting characteristic of motor.In this 3rd embodiment, the amount of bias OS2 of the center of curvature O2 of the second magnetic surface eccentric arc can be adjusted with 2 of the radius Rs of the second magnetic surface eccentric arc to be cooperated, and can take into account the magnetic flux density radial component that makes motor air-gap under the situation that the torque of controlling oneself can suitably be reduced again and distribute to become and be in close proximity to sine wave.
The conductor storage tank that the present invention is used for forming the mouse cage winding must change and carry out various forms of flute profiles in response to the requirement of its starting torque of start type permanent magnet synchronous motor and starting characteristic voluntarily.So other purpose of the present invention is four kinds of different enforcement sample attitudes that the following stated all is provided in each embodiment of above each three embodiment of the present invention, is summarized as follows:
Implement in the sample attitude first, its rotor conductor storage tank number is to be circular recess;
Implement in the sample attitude second, the permanent magnet of its each fan-shaped main pole is divided into two, and the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be polygon-octagonal;
Implement in the sample attitude the 3rd, the permanent magnet of its each fan-shaped main pole of rotor also is divided into two, and the corresponding central angle of each sheet also is 45 degree, makes eight permanent magnets of rotor be the quatrefoil shape shown in the figure; And
Implement in the sample attitude the 4th, the permanent magnet of its each fan-shaped main pole of rotor is divided into four, and the arrangement mode of each sheet is badge shape.
For reaching above-mentioned purpose, the rotor structure that the invention provides a kind of permanent magnet synchronous motor of start type voluntarily comprises an axle center; Four fan-shaped main poles, its surperficial circular arc is one first magnetic surface eccentric arc, its central point is for from this centre of rotor point O with the amount of bias being four the first eccentric point O1 that OS1 biasing comes, and this first magnetic surface eccentric arc is that to make the maximum air gap thickness T be two to five times of minimal air gap thickness t 1 again; Four permanent magnets are disposed at the inner ring of each fan-shaped main pole respectively; A plurality of conductor storage tanks that are used for forming the mouse cage winding, its shape resembles a pear in shape, and it is to arrange in the form of a ring and equidistantly with the direction of aiming at each first eccentric point O1 and be disposed in each this fan-shaped main pole of this outer ring of this rotor; And four depressions, be arranged at the intermediate point of the first magnetic surface eccentric arc of each this fan-shaped main pole respectively.
Description of drawings
Fig. 1 is No. 5,952,757, common U.S. Pat, the structural representation of Boyd et al. " LSPM motor ".
Fig. 2 is No. 5,097,166, common U.S. Pat, Mikulic, the structural representation of " the rotor lamination of AC permanent-magnet motor stator ".
Fig. 3 is No. 4,922,152, common U.S. Pat, the structural representation of Gleghorn et al. " synchronous motor rotor lamination ".
Fig. 4 is No. 4,748,359, common U.S. Pat, the structural representation of Yahara et al. " permanent magnet motor with sinusoidal wave magnetic flux pattern ".
Fig. 5 is No. 4,358,696, common U.S. Pat, the structural representation of Liu et al. " permanent magnet synchronous motor rotor ".
Fig. 6 is No. 4,139,790, common U.S. Pat, the structural representation of Steen. " the lamination syncmotor rotor that adds rectangular axis ".
Fig. 7 is TaiWan, China patent TW 371,126, the structural representation of people such as Kang Jihong " magneto induction synchronous motor rotor structure improvement () ".
Fig. 8 is TaiWan, China patent TW 362,843, the structural representation of people such as Kang Jihong " magneto induction synchronous motor rotor structure improvement (two) ".
Fig. 9 opens 2003-23740 (P2003-23740A) for common Japan Patent spy, according to the structural representation of mountain handsome " the magneto rotor of permanent magnet motor ".
Figure 10 is the schematic perspective view that the permanent magnet synchronous motor of start type voluntarily of use stator straight trough of the present invention and the permanent magnet synchronous motor of start type voluntarily of copying use skewed stator slot of the present invention check one against another.。
Figure 11 is the structural representation of first embodiment of the rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention.
Figure 12 is that the number of the conductor storage tank in each fan-shaped main pole is under the situation of even number among first embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the position view of semicircle depression.
Figure 13 is the partial enlarged drawing of Figure 12, is used for highlighting the curvature changing of the first magnetic surface eccentric arc with respect to the magnetic surface circular arc.
Figure 14 is that the number of the conductor storage tank in each fan-shaped main pole is under the situation of odd number among first embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the position view of semicircle depression.
Figure 15 is in the rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, and the first magnetic surface eccentric arc makes the change profile of motor air-gap thickness, its air gap thickness minimum be t1, and that its air gap thickness maximum is T.
Figure 16 is that the number of the conductor storage tank in each fan-shaped main pole is under the situation of even number among second embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the position view of semicircle depression.
Figure 17 is used for highlighting the curvature changing of the first magnetic surface eccentric arc with respect to the magnetic surface circular arc for to be the partial enlarged drawing of Figure 16.
Figure 18 is that the number of the conductor storage tank in each fan-shaped main pole is under the situation of odd number among second embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the position view of semicircle depression.
Figure 19 is the structural representation of the 3rd embodiment of the rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention.
Figure 20 is the partial enlarged drawing of Figure 19, is used for highlighting the first magnetic surface eccentric arc and the second magnetic surface eccentric arc curvature changing with respect to the magnetic surface circular arc.
Figure 21 is among the 3rd embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the first magnetic surface eccentric arc and the second magnetic surface eccentric arc make the change profile of motor air-gap thickness, its air gap thickness minimum be t2, and that its air gap thickness maximum is T.
Figure 22 shows that the magnetic flux density radial distribution of motor air-gap is in close proximity to sine wave among first embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention.
Figure 23 shows the magnetic flux density radial distribution figure of the air gap of the common permanent magnet synchronous motor of start type voluntarily, and the magnetic flux density radial distribution and the sine wave shape of its motor air-gap greatly differ from each other.
Figure 24 shows among first embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the magnetic flux density radial distribution figure of motor air-gap, and the magnetic flux density of the position of wherein caving in radially reduction is M.
Figure 25 shows among second embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the magnetic flux density radial distribution figure of motor air-gap, and the magnetic flux density of the position of wherein caving in radially reduction is N.
Figure 26 shows among the 3rd embodiment of rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the magnetic flux density radial distribution figure of motor air-gap, and the radially-arranged maximum reduction of its magnetic flux density is P.
Figure 27 shows first the implementing in the sample attitude of each embodiment of three embodiment of the rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, and its rotor conductor storage tank is a circular recess.
Figure 28 shows second the implementing in the sample attitude of each embodiment of three embodiment of the rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the permanent magnet of its each fan-shaped main pole is divided into two, makes eight permanent magnets of rotor be polygon-octagonal.
Figure 29 shows the 3rd the implementing in the sample attitude of each embodiment of three embodiment of the rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, the permanent magnet of its each fan-shaped main pole is divided into two, makes eight permanent magnets of rotor be the quatrefoil shape shown in the figure.
Figure 30 shows the 4th the implementing in the sample attitude of each embodiment of three embodiment of the rotor structure of the permanent magnet synchronous motor of start type voluntarily of the present invention, and the permanent magnet of its each fan-shaped main pole is divided into four, and the arrangement mode of each sheet is badge shape.
Embodiment
As shown in figure 10 for of the present invention with the stator straight trough the permanent magnet synchronous motor of start type voluntarily 1010 and the schematic perspective view of copying the permanent magnet synchronous motor of start type voluntarily 1040 of use skewed stator slot of the present invention to check one against another.The permanent magnet synchronous motor of start type voluntarily 1010 of use stator straight trough of the present invention comprises a stator 1O12, a rotor 1014, and an axle center 1016, and wherein this stator 1012 has stator straight trough 1018.Moreover the permanent magnet synchronous motor of start type voluntarily 1040 of use skewed stator slot of the present invention comprises a stator 1042, one rotors 1044, and an axle center 1046, and wherein this stator 1042 has skewed stator slot 1048.
As shown in figure 11, the permanent magnet synchronous motor of start type voluntarily 11 of first embodiment of the invention comprises an external stator 1101 (after this abbreviating stator 1101 as) and an internal rotor 1121 (after this abbreviating rotor 1121 as), and an air gap 1111 that is sandwiched between the two.Stator 1101 is for being formed by a plurality of selenium steel disc institute storehouse, and its inner ring contains a plurality of stator teeths 1103 and a plurality of Stator Slots 1105 staggered bad shapes that width is w to be arranged.Rotor 1121 is also for being formed by a plurality of selenium steel disc institute storehouse, its inner ring contains 1120 and four permanent magnets 1126 in an axle center (spindle), and its outer ring is contained a plurality of conductor storage tanks (conductor slot) 1128 that are used for forming mouse cage (Squirrel cage) and arrange in the form of a ring and is the rotor tooth portion 1130 of giving prominence to shape therebetween.
And for example shown in Figure 11, X-X and Y-Y are the center line of rotor 1121, and rotor 1121 is to become radial dividers L1, L2, L3 and the L4 of miter angle to divide into four fan-shaped main poles (fan-shaped pole) A, B, C and D that central angle is 90 degree with Y-Y with center line X-X.
Figure 12 is the partial enlarged drawing of Figure 11.As shown in figure 12, the central point of rotor 1121 is O, and the radius of curvature of its magnetic surface circular arc 1122 is R.And the surperficial circular arc of the fan-shaped main pole A of each of rotor 1121, B, C and D is called the first magnetic surface eccentric arc 1124, its center of curvature O1 setovers from O, and the length of its amount of bias OO1 is OS1, and its radius of curvature is R1, thereby following relational expression, R-R1=OS1 arranged.
Again as shown in figure 11, the first magnetic surface eccentric arc 1124 intersects at a, b, c and d 4 points respectively with radial dividers L1, L2, L3 and L4, these 4 two-end-point a and the b that promptly are respectively the first magnetic surface eccentric arc ab of fan-shaped main pole A, two-end-point b and the c of the first magnetic surface eccentric arc b c of fan-shaped main pole B, two-end-point c and the d of the first magnetic surface eccentric arc c d of fan-shaped main pole C, and two-end-point d and a of the first magnetic surface eccentric arc d a of fan-shaped main pole D.Again, this first magnetic surface eccentric arc 1124 and center line X-X and Y-Y intersect at e1, f1, g1, h1 4 points in fan-shaped main pole A, B, C and the D scope respectively, and this e1, f1,4 of g1, h1 also are respectively the intermediate points of the first magnetic surface eccentric arc a b, b c, c d and the d a of fan-shaped main pole A, B, C and D.
Again as shown in figure 11, in the first embodiment of the present invention, first magnetic surface eccentric arc a b, b c, c d, intermediate point e1, the f1 of d a, g1, the h1 place of start type permanent magnet synchronous motor 11 in above-mentioned fan-shaped main pole A, B, C and D scope is provided with semicircle depression E1, F1, G1, H1 respectively voluntarily, its diameter is the width w of the stator teeth 1103 of stator former 1101, so its radius r=w/2, and the semi-circular arc two ends of its semicircle depression E1, F1, G1, H1 are that mode with fillet (fillet) 1136 is connected with the first magnetic surface eccentric arc 1124.
Figure 16, shown in Figure 17 and for example, in the second embodiment of the present invention, start type permanent magnet synchronous motor 11 is when the number of a plurality of conductor storage tanks 1128 of this fan-shaped main pole A, B, C and D when each is even number voluntarily, except the tooth portion 1130 locational depressions of this rotor, the depression of a same size is set respectively again on adjacent tooth portion 1130 positions, its left and right sides.Thereby, at above-mentioned fan-shaped main pole A, B, C, with the first magnetic surface eccentric arc a b in the D scope, b c, c d, the intermediate point e1 of d a, f1, g1, the semicircle depression E1 that h1 place that is rotor tooth portion 1132 places are provided with, F1, G1, adjacent rotors tooth portion 1132 places, the left and right sides of H1 also are provided with semicircle depression E2 respectively, F2, G2, H2 and E3, F3, G3, H3, its diameter also is the width w of the stator teeth 1103 of stator former 1101, so its radius r 1=w/2 and r2=w/2, and its semicircle depression E2, F2, G2, H2 and E3, F3, G3, the semi-circular arc two ends of H3 also are that the mode with fillet (fillet) 1136 is connected with the first magnetic surface eccentric arc 1124.And as shown in figure 18, when the number of a plurality of conductor storage tanks 1128 of this fan-shaped main pole is odd number when each, except the conductor storage tank 1128 locational depressions of this rotor, the depression of one same size respectively is set again on adjacent conductor storage tank 1128 positions, its left and right sides, so each fan-shaped main pole respectively has three depressions, is provided with 12 depressions altogether on this rotor altogether.
And for example shown in Figure 19, in the third embodiment of the present invention, the rotor 1121 of start type permanent magnet synchronous motor 11 can be divided into inner ring and outer ring voluntarily, and its central point is O.This rotor 1121 comprises an axle center 1120, four fan-shaped main pole A, B, C, D, four permanent magnets 1126 and a plurality of conductor storage tank 1128 (seeing Figure 11).Wherein, this axle center 1120 is positioned at the inner ring center of this rotor 1121; The central angle of each fan-shaped main pole A, B, C, D is 90 degree, its surperficial circular arc is respectively ab, bc, cd and da, and its each surperficial circular arc respectively by one in the middle of being positioned at the first magnetic surface eccentric arc a1-a2, b1-b2, c1-c2, d1-d2 and be positioned at the second magnetic surface eccentric arc a-a1, the a2-b of this first magnetic surface eccentric arc the right and left; B-b1, b2-c; C-c1, c2-d; D-d1, d2-a are tangent to be constituted, and its point of contact is respectively a1, a2 in each fan-shaped main pole; B1, b2; C1, c2; D1, d2; Its first magnetic surface eccentric arc is that the central point O from this rotor 1121 is that four first eccentric point O1 coming of OS1 biasing are as its center of curvature point O1 with the amount of bias, and its radius is R1, so just like the relational expression of taking second place, R-R1=OS1, and its second magnetic surface eccentric arc is to be that four second eccentric point O2 coming of OS2 biasing are as its center of curvature point O2 with the amount of bias from this centre of rotor point O, and its radius is R2, so just like the relational expression of taking second place, R-R2=OS2, this first magnetic surface eccentric arc is that to make the maximum air gap thickness T be two to five times of minimal air gap thickness t 1 again, that is relational expression, T=2t15t1 arranged; Four permanent magnets are disposed at the inner ring of each fan-shaped main pole respectively; A plurality of conductor storage tanks 1128, be used for forming the mouse cage winding, its shape resembles a pear in shape, its first magnetic surface eccentric arc at each surperficial circular arc partly is to arrange in the form of a ring and equidistantly with the direction of aiming at each first eccentric point O1 and be disposed in each this fan-shaped main pole of this outer ring of this rotor, and its second magnetic surface eccentric arc at each surperficial circular arc partly is to arrange in the form of a ring and equidistantly with the direction of aiming at each second eccentric point O2 and be disposed in each this fan-shaped main pole of this outer ring of this rotor; Its spacing place also forms the rotor tooth portion be outstanding shape, and it is positioned at spacing between per two fan-shaped main poles, and then the spacing of the storage tank in the middle of fan-shaped is little than each.
In above-mentioned each fan-shaped main pole A, B, C and D scope, as Figure 12 showed semicircle depression E1, a F1, G1, H1 and as three semicircles that Figure 16 showed cave in E1, F1, G1, H1 and E2, F2, G2, H2, and E3, F3, G3, H3 all remove, and with 1901 replacements of one second magnetic surface eccentric arc.As described above, the central point of rotor 1121 is O, the radius of curvature of its magnetic surface circular arc 1122 is R, and the surperficial circular arc of the fan-shaped main pole A of each of rotor 1121, B, C and D is called the first magnetic surface eccentric arc 1124, its center of curvature O1 setovers from O, and the length of its amount of bias OO1 is OS1, and its radius of curvature is R1, thereby following relational expression, R-R1=OS1 arranged.Similar according to this situation, the center of curvature O2 of this second magnetic surface eccentric arc 1901 setovers from O, and the length of its amount of bias OO2 is OS2, and its radius of curvature is R2, thereby following relational expression is arranged, R2-R=OS2.
With reference to Figure 19, in the 3rd embodiment, the points of tangency of the second magnetic surface eccentric arc 1901 and the first magnetic surface eccentric arc 1124 is respectively a1 and a2, b1 and b2, c1 and c2, d1 and d2 in the scope of fan-shaped main pole A, B, C, D again.In other words, in the 3rd embodiment, in the scope of fan-shaped main pole A, B, C, D, the second magnetic surface eccentric arc 1901 is respectively a1 a2, b1 b2, c1 c2, d1 d2, and the first magnetic surface eccentric arc 1124 in first embodiment and second embodiment then becomes a a1 and a2b; B b1 and b2 c; C c1 and c2 d; D d1 and d2a.
Again as shown in figure 11, four permanent magnets 1126 of the aforementioned permanent magnet synchronous motor of start type voluntarily 11 of the present invention are at above-mentioned fan-shaped main pole A, B, C, with all contain one in the D, and its a plurality of conductor storage tanks 1128 are at above-mentioned fan-shaped main pole A, B, C, with all contain identical number in the D, and these a plurality of conductor storage tanks 1128 are to be that radially (radial.direction) of the first magnetic surface eccentric arc 1124 of O1 (seeing Figure 12) is equidistantly to be uniformly distributed in the outer ring of rotor 1121 with the center of curvature, and except as Figure 14 and shown in Figure 180 if each fan-shaped main pole A, B, C, when the number of the conductor storage tank 1128 among the D is odd number, then the conductor storage tank 1128 of each semicircle recess needs to fan-shaped main pole A, B, C, outside center O 1 skew of D, remaining each conductor storage tank 1128 is all equidistant with this center of curvature O1, and the ledge of 1128 of adjacent two conductor storage tanks promptly becomes rotor tooth portion 1130.Therefore, the angle that the conductor storage tank of each fan-shaped main pole A, B, C, D is 1128 can be fixed, and the spacing (that is width of rotor tooth portion 1130) of 1128 of the conductor storage tanks of each fan-shaped main pole A, B, C, D can keep equating.Conductor storage tank 1128 should adopt suitable width, but also should not make the too intensive phenomenon that produces magnetic saturation (magnetic saturation) of the magnetic line of force that passes therebetween because of width is too small because of the excessive rotor tooth portion 1130 of being separated by that makes therebetween.Spacing 1132 (being equivalent to rotor tooth portion 1130) as for 1128 of two adjacent conductor storage tanks in the different fan-shaped main pole of per two fan-shaped main pole joints then should be dwindled as far as possible, so except the interelectrode magnetic leakage that can reduce each permanent magnet 1126, still can make the magnetic flux density radial component distribution of motor air-gap 1111 more approach sinusoidal wave distribution.But the width of spacing 1132 is a principle to be not less than the required mechanical strength of least amount of deformation of allowing that rotor 1121 is produced when rotated.
In first embodiment and second embodiment, respectively as Figure 11, Figure 12, Fig. 13 and Figure 16, shown in Figure 17, the number of the conductor storage tank 1128 in each fan-shaped main pole A, B, C, D is under the situation of even number, correspond respectively to semicircle depression E1, F1, G1, H1 among each fan-shaped main pole A, B, C, the D, its relative position with conductor storage tank 1128 is that cave in E1, F1, G1, H1 of semicircle among each fan-shaped main pole A, B, C, the D just is positioned in the middle of the gap (that is rotor tooth portion 1130) of adjacent two conductor storage tanks 1128.But as Figure 14 and shown in Figure 180, if when the number of the body storage tank 1128 among each fan-shaped main pole A, B, C, the D is odd number, then each semicircle depression E1, F1, the lucky alignment ring of G1, H1 are listed in the conductor storage tank 1128 in rotor 1121 outer rings.1128 need of conductor storage tank that are somebody's turn to do in alignment with semicircle depression E1, F1, G1, H1 that are positioned at e1, f1, g1, h1 each point this moment are offset to the center O of rotor 1121.
Figure 13 is the partial enlarged drawing of Figure 12.Dotted line in Figure 12 and Figure 13 represents that the center O with rotor 1121 is the center of circle and be the magnetic surface circular arc 1122 that radius is done with rotor radius R, is used for highlighting the first magnetic surface eccentric arc 1124 that center of curvature O1 and its radius of curvature with biasing the be R1 curvature changing with respect to magnetic surface circular arc 1122.As shown in figure 15 and with reference to Figure 12, according to aforementioned, the fan-shaped main pole A of each of rotor 11 of the present invention, B, C, the first magnetic surface eccentric arc 1124 of the center of curvature O1 of the pole surface use one of D and the center of curvature O biasing of rotor magnetic surface circular arc, make the thickness of motor air-gap 1111 (also seeing Figure 11) form an inhomogeneous and gradual change profile, its air gap thickness minimum be t1, be positioned at semicircle depression E1, F1, G1, the e1 at H1 place, f1, g1, the h1 each point, that is fan-shaped main pole A, B, C, each first magnetic surface eccentric arc a b in the D, b c, c d, the intermediate point of d a, and that its air gap thickness maximum is T, lays respectively at each first magnetic surface eccentric arc a b, b c, c d, two-end-point a and the b of d a; B and c; C and d; And d and a.The amount of bias OS1 of the first magnetic surface eccentric arc center of curvature O1 can be adjusted with first 1 of the magnetic surface eccentric arc radius R to be cooperated, the ratio range of " minimum thickness " and " maximum ga(u)ge " of motor air-gap is changed approximately between 1: 2 ~ 1: 4, for example minimal air gap thickness is t1, and maximum air gap thickness is between T=2t1 ~ 5t1.Its objective is that the magnetic flux density radial component distribution (radial.air gap magnetic fluxdensity distribution) that makes motor air-gap becomes as shown in figure 22, is in close proximity to sine wave (sinusoidal wave); And the cogging torque (cogging torque) of motor is more reduced.Moreover in the radial distribution value of the magnetic flux density of motor air-gap 1111, as shown in figure 24, as described above, in first embodiment, the present invention is at intermediate point e1, f1, g1, the h1 of each first magnetic surface eccentric arc set semicircle depression E1, F1, G1, H1; As shown in figure 25, in a second embodiment, three semicircles depression E1, F1, G1, H1 and E2, F2, G2, H2 that the present invention is set in intermediate point e1, f1, g1, h1 and left and right sides adjacent rotors tooth portion 1130 positions thereof of each first magnetic surface eccentric arc, and E3, F3, G3, H3. And as shown in figure 26, in the 3rd embodiment, further replace above-described semicircle depression with the second level and smooth magnetic surface eccentric arc 1901, more than these methods all can make the radial distribution value of the magnetic flux density of motor air-gap 1111, in intermediate point e1 near each first magnetic surface eccentric arc, f1, g1, reduced near the h1 place, its reduction is the M among first embodiment as shown in figure 24, N among second embodiment as shown in figure 25, and the P among the 3rd embodiment as shown in figure 26, so can further reduce the cogging torque of motor, noise and vibration when reducing motor running, and weaken the main pole magnetic flux of motor a little, make the fan-shaped main pole A that the transient state when stopping to starting operation of start type permanent magnet synchronous motor voluntarily can Yin Mada, B, C, the self-holding torque that the magnetic flux of D caused (self-retaining torque) and reducing, thereby can improve the starting characteristic of motor.In the 3rd embodiment, the amount of bias OS2 of the second magnetic surface eccentric arc center of curvature O2 can be adjusted with the second magnetic surface eccentric arc radius R 2 and be cooperated, the ratio range of " minimum thickness " and " maximum ga(u)ge " of motor air-gap is changed approximately between 1: 2 ~ 1: 4, for example minimal air gap thickness is t2, and maximum air gap thickness is between T=2t2 ~ 5t2.So, can take into account the magnetic flux density radial component that makes motor air-gap under the situation that the torque of controlling oneself can suitably be reduced again distributes to become and is in close proximity to sine wave.Its result, the magnetic flux density radial component of air gap is distributed as shown in figure 26.Its objective is that the magnetic flux density radial component distribution (radial.air gap magnetic flux density distribution) that makes motor air-gap becomes as shown in figure 22, is in close proximity to sine wave (sinusoidal wave); And the cogging torque (coggingtorque) of motor is more reduced.In Figure 22, the unit of its ordinate is magnetic flux density TESLA (Tesla).One TESLA is defined as the lead of one ampere in one meter of length and electric current, and placing magnetic field to make it stressed perpendicular to magnetic direction is the magnetic field size of a Newtonian time.The circumferential distance that as for the unit on the abscissa then is motor air-gap is in mm (millimeter).It is defined as in the circumference that is located in the motor air-gap position, and this circumference is pulled into straight line, and this straight length (that is outer electrical path length of this circumference) is the circumferential distance of motor air-gap.Ordinate among following Figure 23 ~ Figure 26 and the unit of abscissa also with Figure 22 in unit identical.With Figure 22 comparison, the radial distribution and the sine wave shape of the magnetic flux density of the air gap of the common permanent magnet synchronous motor of start type voluntarily as shown in figure 23 greatly differ from each other.
In addition, rotor surface of the present invention adopts eccentric circular arc, when the magnetic field that stator winding is constituted when the motor load increase and then increases, can be because of the air gap at each main pole two ends of adopting eccentric its rotor of circular arc be bigger, and can effectively weaken the influence that stator winding magnetic field causes demagnetization (demagnetization) to be produced to permanent magnet.
As previously discussed, in each embodiment of three embodiment of the present invention, the conductor storage tank of the mouse cage of rotor, can be according to the requirement of the starting torque of start type permanent magnet synchronous motor voluntarily and starting characteristic and carry out the change of various flute profiles, and the permanent magnet in each fan-shaped main pole of the present invention can be monolithic (as shown in figure 27), biplate (as Figure 28, shown in Figure 29) or multi-disc (as shown in figure 30) and synthesizes.Each embodiment all has the various respectively as Figure 27, Figure 28, Figure 29 and different enforcement sample attitude shown in Figure 30 of the following stated.Now be summarized as follows:
The conductor storage tank that the present invention is used for forming the mouse cage winding must carry out the change of various flute profile in response to the requirement of its starting torque of start type permanent magnet synchronous motor and starting characteristic voluntarily.In the first enforcement sample attitude as shown in figure 27, its rotor conductor storage tank number is to be circular recess.
In the second enforcement sample attitude as shown in figure 28, the permanent magnet of its each fan-shaped main pole A, B, C, D is divided into two, and the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be polygon-octagonal.
In the 3rd enforcement sample attitude as shown in figure 29, the permanent magnet of its rotor each fan-shaped main pole A, B, C, D also is divided into two, and the corresponding central angle of each sheet also is 45 degree, makes eight permanent magnets of rotor be the quatrefoil shape shown in the figure.
In the 4th enforcement sample attitude as shown in figure 30, the permanent magnet of its rotor each fan-shaped main pole A, B, C, D is divided into four, and the arrangement mode of each sheet is badge shape.
The setting of the permanent magnet synchronous motor of start type voluntarily 11 each fan-shaped main pole permanent magnet of the present invention, it is the inboard of conductor storage tank that is positioned at the mouse cage of rotor, make the permanent magnet must be after the die casting manufacturing of the cage-shaped structure of rotor is finished, row places in the rotor permanent magnet storage tank again, so not only can guarantee the temperatures involved when permanent magnet is not made by the cage-shaped structure die casting of rotor, before every permanent magnet places the rotor permanent magnet storage tank, still can carry out magnetic properties in advance and measure, guarantee stablizing of start type permanent magnet synchronous motor performance voluntarily with reliable.
Because the present invention adopts the magnetic surface eccentric arc of rotor, can obtain to be in close proximity to the magnetic flux density radial component distribution of sinusoidal wave air gap, so can not must as tradition start type permanent magnet synchronous motor voluntarily, for avoiding rotor to use the rare-earth permanent magnet of expensive high energy product, cause a commentaries on classics torsion (cogging torque) greatly, make motor produce poor starting and the shortcoming that turns round and vibrate, and stator core must be adopted the structure of skewed slot (skew), so will significantly improve the degree of difficulty and the production cost of stator winding; Therefore the present invention can obtain the magnetic flux of bigger main pole, need not use skewed slot because of stator again, therefore can effectively improve the running efficiency and the power factor of start type permanent magnet synchronous motor voluntarily, and effectively reduce the running noise and vibration of start type permanent magnet synchronous motor voluntarily.And each first magnetic surface eccentric arc center, the semicircle depression of one diameter near motor stator tooth portion width is set, the main pole magnetic flux of motor is weakened, make the transient state when stopping to starting operation of start type permanent magnet synchronous motor voluntarily, the self-holding torque (self-retaining torque) that is caused by motor main pole magnetic flux is reduced, and the starting characteristic of motor is improved.
In addition, because rotor surface of the present invention adopts eccentric circular arc, when motor load increases, even increase is followed in the magnetic field that stator winding constituted, but because the air gap at each fan-shaped main pole two ends is bigger, so can effectively weaken demagnetization (demagnetization) caused in stator winding magnetic field to permanent magnet influence.
Above for embodiment only in the preferable enforcement kenel of explanation, can not with restriction scope of the invention process, the equalization of doing according to claim changes and modifies such as, all still belongs within the patent covering scope of the present invention.
Component symbol is to as directed
1010, the voluntarily start type permanent magnet synchronous motor of use stator straight trough of the present invention
1040, copy the voluntarily start type permanent magnet synchronous motor of use skewed stator slot of the present invention
1012,1042 stators 1014,1044 rotors
1016,1046 axle center 1018, stator straight trough
1048, skewed stator slot 11, start type permanent magnet synchronous motor voluntarily
1101, stator 1103, stator teeth
1105, Stator Slots 1111, motor air-gap
1120, axle center 1121, internal rotor
1122, magnetic surface circular arc 1124, the first magnetic surface eccentric arc
1126, permanent magnet 1128, conductor storage tank
1130, the spacing between rotor tooth section 1132, two adjacent conductor storage tanks
1136, fillet 1901, the second magnetic surface eccentric arc
A, B, the fan-shaped main pole of C, D
E1, F1, G1, H1, E2, F2, G2, H2, E3, F3, G3, H3 semicircle depression
L1, L2, L3, L4 radial dividers
The reduction of the radial magnetic flux density of M, N, P motor air-gap
Central point O1 first eccentric point of O rotor
The center of curvature of the O2 second magnetic surface eccentric arc; Second eccentric point
The amount of bias of the center of curvature of the OS1 first magnetic surface eccentric arc
The amount of bias of the center of curvature of the OS2 second magnetic surface eccentric arc
The radius of the radius of curvature R 1 first magnetic surface eccentric arc of R magnetic surface circular arc
The radius of the radius r semicircle depression of the R2 second magnetic surface eccentric arc
T maximum air gap thickness t 1, t2 minimal air gap thickness
The diameter X-X of w semicircle depression, the center line of Y-Y rotor
The end points of a, b, c, d magnetic surface eccentric arc
Ab, bc, cd, the da first magnetic surface eccentric arc
The points of tangency of a1, a2, b1, b2, c1, c2, d1, the d2 second magnetic surface eccentric arc and the first magnetic surface eccentric arc
The intermediate point of e1, f1, g1, h1 magnetic surface eccentric arc
Claims (15)
1, a kind of rotor structure of the permanent magnet synchronous motor of start type voluntarily, this motor comprises an external stator and an internal rotor, abbreviates stator and rotor as, and an air gap that is sandwiched between the two; It is characterized in that: the inner ring of described stator contains a plurality of stator teeths that width is w and a plurality of Stator Slots and is staggered annular arrangement, and this region trochanterica is divided into inner ring and outer ring and its central point is O, and the radius of its magnetic surface circular arc is R, and this rotor structure comprises:
One axle center is positioned at the inner ring center of this rotor;
Four fan-shaped main poles, the central angle of its each fan-shaped main pole is 90 degree, and its surperficial circular arc is one first magnetic surface eccentric arc, its central point is for from this centre of rotor point O with the amount of bias being four the first eccentric point O1 that OS1 biasing comes, and its radius is R1 respectively, so just like the relational expression of taking second place, R-R1=OS1, this first magnetic surface eccentric arc is that to make the maximum air gap thickness T be two to five times of minimal air gap thickness t 1 again, that is relational expression is arranged, T=2t1 ~ 5t1;
Four permanent magnets are disposed at the inner ring of each fan-shaped main pole respectively;
A plurality of conductor storage tanks, be used for forming the mouse cage winding, its shape resembles a pear in shape, it is to arrange in the form of a ring and equidistantly with the direction of aiming at each first eccentric point O1 and be disposed in each this fan-shaped main pole of this outer ring of this rotor, its spacing place also forms the rotor tooth portion be outstanding shape, and it is positioned at spacing between per two fan-shaped main poles, and then the spacing of the storage tank in the middle of fan-shaped is little than each; And four depressions, be arranged at the intermediate point of the first magnetic surface eccentric arc of each this fan-shaped main pole respectively, semicircular in shape and its radius are r, its width is w again, and when the number of a plurality of conductor storage tanks of this fan-shaped main pole is even number when each, the position of this depression is the tooth portion of aiming at rotor, and when each when the number of a plurality of conductor storage tanks of this fan-shaped main pole is odd number, the position of this depression is the conductor storage tank of aligning rotor;
Wherein, except when the number of the conductor storage tank in each fan-shaped main pole is when being odd number, the conductor storage tank of each semicircle recess needs outside center O 1 skew of fan-shaped main pole, and remaining each conductor storage tank is all equidistant with this center of curvature O1.
2, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 1, it is characterized in that: wherein the shape of this conductor storage tank is rounded.
3, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 1, it is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into two, the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be polygon-octagonal.
4, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 1, it is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into two, the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be quatrefoil shape.
5, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 1 is characterized in that: wherein the permanent magnet of each fan-shaped main pole is divided into four, and its arrangement mode is badge shape.
6, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 1, it is characterized in that: when wherein the number of a plurality of conductor storage tanks of each this fan-shaped main pole is even number, except the locational depression of tooth portion of this rotor, the depression of a same size is set respectively again on the adjacent tooth portion position, its left and right sides; And when each when the number of a plurality of conductor storage tanks of this fan-shaped main pole is odd number, except the locational depression of conductor storage tank of this rotor, the depression of one same size respectively is set again on the adjacent conductor storage tank position, its left and right sides, so each fan-shaped main pole respectively has three depressions, is provided with 12 depressions altogether on this rotor altogether.
7, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 6, it is characterized in that: wherein the shape of this conductor storage tank is rounded.
8, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 6, it is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into two, the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be polygon-octagonal.
9, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 6, it is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into two, the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be quatrefoil shape.
10, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 6 is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into four, and its arrangement mode is badge shape.
11, a kind of rotor structure of the permanent magnet synchronous motor of start type voluntarily, this motor comprises an external stator and an internal rotor, abbreviates stator and rotor as, and an air gap that is sandwiched between the two; It is characterized in that: the inner ring of described stator contains a plurality of stator teeths that width is w and a plurality of Stator Slots and is staggered annular arrangement, and this region trochanterica is divided into inner ring and outer ring and its central point is O, and the radius of its magnetic surface circular arc is R, and this rotor structure comprises:
One axle center is positioned at the inner ring center of this rotor;
Four fan-shaped main poles, the central angle of its each fan-shaped main pole is 90 degree, its surperficial circular arc is respectively ab, bc, cd and da, and its each surperficial circular arc be respectively one in the middle of being positioned at the first magnetic surface eccentric arc a1-a2, b1-b2, c1-c2, d1-d2 and be positioned at the second magnetic surface eccentric arc a-a1, the a2-b on these first magnetic surface eccentric arc both sides; B-b1, b2-c; C-c1, c2-d; D-d1, d2-a are tangent to be constituted, and its point of contact is respectively a1, a2 in each fan-shaped main pole; B1, b2; C1, c2; D1, d2; Its first magnetic surface eccentric arc is to be that four first eccentric point O1 coming of OS1 biasing are as its center of curvature point O1 with the amount of bias from this centre of rotor point O, and its radius is R1, so just like the relational expression of taking second place, R-R1=OS1, and its second magnetic surface eccentric arc is to be that four second eccentric point O2 coming of OS2 biasing are as its center of curvature point O2 with the amount of bias from this centre of rotor point O, and its radius is R2, so just like the relational expression of taking second place, R-R2=OS2, this first magnetic surface eccentric arc is that to make the maximum air gap thickness T be two to five times of minimal air gap thickness t 1 again, that is relational expression, T=2t15t1 arranged;
Four permanent magnets are disposed at the inner ring of each fan-shaped main pole respectively; And a plurality of conductor storage tanks, be used for forming the mouse cage winding, its shape resembles a pear in shape, its first magnetic surface eccentric arc at each surperficial circular arc partly is to arrange in the form of a ring and equidistantly with the direction of aiming at each first eccentric point O1 and be disposed in each this fan-shaped main pole of this outer ring of this rotor, and its second magnetic surface eccentric arc at each surperficial circular arc partly is to arrange in the form of a ring and equidistantly with the direction of aiming at each second eccentric point O2 and be disposed in each this fan-shaped main pole of this outer ring of this rotor; Its spacing place also forms the rotor tooth portion be outstanding shape, and it is positioned at spacing between per two fan-shaped main poles, and then the spacing of the storage tank in the middle of fan-shaped is little than each.
12, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 11, it is characterized in that: wherein the shape of this conductor storage tank is rounded.
13, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 11, it is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into two, the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be polygon-octagonal.
14, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 11, it is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into two, the corresponding central angle of each sheet is 45 degree, makes eight permanent magnets of rotor be quatrefoil shape.
15, the rotor structure of the permanent magnet synchronous motor of start type voluntarily as claimed in claim 11 is characterized in that: wherein the permanent magnet of this each fan-shaped main pole is divided into four, and its arrangement mode is badge shape.
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| CNB031540600A CN100349359C (en) | 2003-08-13 | 2003-08-13 | Self-start permanent magnet synchronous motor rotor structure |
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| CNB031540600A CN100349359C (en) | 2003-08-13 | 2003-08-13 | Self-start permanent magnet synchronous motor rotor structure |
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| CN100349359C true CN100349359C (en) | 2007-11-14 |
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| US7705502B2 (en) * | 2006-04-14 | 2010-04-27 | Emerson Electric Co. | Interior magnet machine with non-perpendicular slots |
| CN102185449A (en) * | 2011-02-23 | 2011-09-14 | 华北电力大学 | Self-starting permanent magnet motor with three-section-circular-arc magnetic pole structure |
| CN105932844A (en) * | 2016-06-28 | 2016-09-07 | 无锡新大力电机有限公司 | Novel permanent magnet synchronous motor structure |
| FR3073148B1 (en) * | 2017-11-07 | 2021-04-09 | G C Tech | PORTABLE DEVICE TO GENERATE LOW FREQUENCY SINUSOIDAL INDUCED ELECTRIC CURRENT |
| CN108173402A (en) * | 2018-01-21 | 2018-06-15 | 湖北西浦电机科技有限责任公司 | The salient pole synchronous electric machine of double eccentric arc field structures |
| CN109149822B (en) * | 2018-11-07 | 2023-10-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and motor |
| TWI806195B (en) * | 2021-10-15 | 2023-06-21 | 士林電機廠股份有限公司 | Motor rotor magnet fixing structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US592757A (en) * | 1897-11-02 | Trace-fastener | ||
| CN2497468Y (en) * | 2001-09-26 | 2002-06-26 | 朱明聪 | Built-in permanent-magnet motor rotor |
| JP2003023740A (en) * | 2001-07-05 | 2003-01-24 | Mitsubishi Electric Corp | Permanent-magnet rotor for permanent-magnet motor |
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2003
- 2003-08-13 CN CNB031540600A patent/CN100349359C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US592757A (en) * | 1897-11-02 | Trace-fastener | ||
| JP2003023740A (en) * | 2001-07-05 | 2003-01-24 | Mitsubishi Electric Corp | Permanent-magnet rotor for permanent-magnet motor |
| CN2497468Y (en) * | 2001-09-26 | 2002-06-26 | 朱明聪 | Built-in permanent-magnet motor rotor |
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