CN201118413Y - Disk three-phase brushless permanent magnetic DC electromotor - Google Patents
Disk three-phase brushless permanent magnetic DC electromotor Download PDFInfo
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- CN201118413Y CN201118413Y CNU2007201727428U CN200720172742U CN201118413Y CN 201118413 Y CN201118413 Y CN 201118413Y CN U2007201727428 U CNU2007201727428 U CN U2007201727428U CN 200720172742 U CN200720172742 U CN 200720172742U CN 201118413 Y CN201118413 Y CN 201118413Y
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Abstract
The utility model relates to a permanent-magnet three-phase brushless dc disc motor, aiming at solving the problems that the windings of current similar motors are large in number, with low utilization rate and high making cost, and that the ends of the windings are big. Two disc rotors of the utility model are respectively provided with a plurality pairs of permanent magnets with the south poles alternating with the north poles; three-phase windings are mounted in the virtual slots of a coreless disc stator. The number of magnetic poles of the rotor 2P is equal to 8N or equal to 10N; the number of the virtual slots Z is equal to 9N; wherein N is a signless integral, the three-phase winding are provided with 9N coils and each phase has 3N coils; coils of the three-phase windings in the 9N virtual slots of the stator are arranged in a sequence of A-/A-A-B/B-B-C-/C-C-A and circulate N times in the circumference. The proposal of the utility model can minimize the number of the windings of the motor, reduce the size of the ends of the winding to the minimum and increase the utilization rate of the windings to the maximum, thus minimizing iron consumption and copper consumption of the motor and therefore reducing the production cost of the motor to the lowest.
Description
Technical field
The utility model relates to disc type three-phase brushless direct current permanent magnet motor, more particularly, relate to and a kind ofly do not have the disc type three-phase brushless direct current permanent magnet motor that iron core and disc type external rotor constitute by the disc type stator, it can be used for low speed and directly drives and high-speed driving, also applicable to low speed and generating at a high speed.
Background technology
In the design of Windings of the no stator core disc type brushless direct current permanent magnet motor of tradition, continue to use the cored index of permanent method of induction machine or disc type usually.Every 3 limits arranging three phase windings extremely down, the end of this winding is very big, and the end of three phase windings also overlaps intersection, as shown in Figure 1.The end of winding is big, and copper loss is just big; The overlapping intersection in the end of winding makes the end further become big and thickening again, causes production cost also can uprise.And the operational efficiency of traditional magneto is not given full play to yet.
The every extremely every phase groove of tradition three-phase motor with permanent magnets is counted Z/ (2Pm)＞1/2, and wherein 2P is a number of poles, and m is the number of phases, and Z is the groove number.For example: 8 utmost points, 24 grooves and 8 utmost points, 36 grooves, or the like.In general, the big more motor of every extremely every phase groove number, the end of winding will be big more, and the utilance of winding is low more, and copper loss can be big more, and the manufacturing cost of this class motor is just high more.
At application number is in " brushless electric machine groove number and magnet steel array are closed scheme " patent of 200610024330.X, 21 grooves (26 utmost point), 32 grooves (38 utmost points, 40 utmost points), 39 grooves schemes such as (44 utmost points, 46 utmost points, 50 utmost points) are disclosed, in these schemes, every extremely every phase groove of three-phase motor with permanent magnets is counted Z/ (2Pm)≤1/2.The manufacturing cost of this class motor is lower, but winding utilization is still not very the highest, and its average winding coefficient is about 0.92, and the winding coefficient of indivedual winding coils (or claiming element) is lower than 0.9, and the connecting mode of winding also shows complicated.
At publication number is in " axial gap brushless DC motor " patent of CN1549432A, discloses the scheme of 24 utmost points (18 groove) motors, and wherein every extremely every phase groove is counted q=Z/ (2Pm)≤1/2, and the manufacturing cost of motor is lower.But the winding utilization of this scheme has only 0.866, and the connecting mode of winding also shows complicated.
Disclosed Japan Patent on January 17th, 1997 " spy opens flat 9-10474 " for example again, the holder of this patent is Japanese Toshiba Corporation.This patent proposes a kind of three-phase brushless direct current permanent magnet motor scheme of outer-rotor structure, and it is number of magnetic poles 2P=24 that this patent teeth groove cooperates; Groove is counted Z=36, and corresponding commercial product has gone on the market for many years, is reducing to have obtained very big success aspect the noise.But because the big sulculus structure of stator that this patent adopted, the every extremely every phase groove number of motor is bigger again, makes the processing technology of this motor become rather complicated, and production cost increases a lot.
The utility model content
Above-mentioned defective at prior art, the technical problems to be solved in the utility model is how to make that the number of winding is tending towards minimum in the three-phase brushless direct current permanent magnet motor, it is minimum that the end of winding is tending towards, the utilance of winding is tending towards the highest, thereby make the iron loss of motor and copper loss be tending towards minimum, the production cost of motor is tending towards minimum.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of disc type three-phase brushless permanent magnet DC motor, wherein, many permanent magnets extremely alternate to N, S are housed respectively on two disk rotors, and the permanent magnet S utmost point of the permanent magnet N utmost point on first disk rotor on second disk rotor is to produce axial air-gap magnetic field; In the empty groove of coreless disc type stator three phase windings are installed; It is characterized in that, the number of magnetic poles 2P=8N of described rotor, perhaps 2P=10N, wherein N is a positive integer; The empty groove of described stator is counted Z=9N, three phase windings have 9N coil, every have 3N coil mutually, the ordering of the three-phase winding coil in the individual empty groove of the 9N of described stator is A-/A-A-B-/B-B-C-/C-C-A, and circulation N time in circumference, wherein A represents a coil of A phase winding, and/A represents a bucking coil of A phase winding, B ,/B, C ,/C is by that analogy.
In the utility model, the shape of each permanent magnet can be just circle or normal direction ellipse on the described disk rotor, and described each permanent magnet is uniform along the disk rotor outside, and same epitrochanterian permanent magnet N, S utmost point aligned gaps are 0.1～1mm technology gap; The shape of the empty groove of each of described stator is just circle or the normal direction ellipse corresponding with each permanent magnet on the described disk rotor, and uniform along the disc type stator outside; The center of circle of each permanent magnet is on the circle of identical radially radius on the center of circle of described three a phase winding 9N coil and the described disk rotor, and each coil is simple annular coil and is filled in the described empty groove.
In the utility model, the shape of each permanent magnet also can be fan-shapedly on the described disk rotor, and described each permanent magnet is uniform along the disk rotor outside, and same epitrochanterian permanent magnet N, S utmost point aligned gaps are 0.1～1mm technology gap; The shape of the empty groove of each of described stator is corresponding with each permanent magnet on the described disk rotor fan-shaped, and uniform along the disc type stator outside; The geometric center of each fan-shaped permanent magnet is on the circle of identical radially radius on the geometric center of described three a phase winding 9N coil and the disk rotor, and each coil is fan-shaped and is filled in the described empty groove.
In the utility model, the axial physics air gap on the described disk rotor between each permanent magnet and the stator is 0.15～1mm preferably, and the thickness of described stator is 1～8mm preferably; Described stator center is equipped with stator axis, and bearing is equipped with on the both sides of described stator axis, and described disk rotor is loaded on respectively on one of them bearing.
In the utility model, the lead-in wire of described three phase windings can pass from the stator axis hole of local hollow.
In the utility model, two linear hall sensors can be set, both spend electrical degrees apart from one another by 90, and are fixed on the stator by pcb board; The air-gap field that the sensitive direction of described Hall element forms towards rotor permanent magnet is with the variation of sensing air-gap field.
In the utility model, three switch Hall transducers can be set also, the three spends electrical degrees apart from one another by 120, and is fixed on the stator by pcb board; The air-gap field that the sensitive direction of described Hall element forms towards rotor permanent magnet is with the variation of sensing air-gap field.
The utility model can have following preferred version, N=1, and promptly stator has Z=9 empty groove, and rotor has 2P=8 magnetic pole, and the synchronous speed of motor is n=15f; Perhaps, N=1, stator have Z=9 empty groove, and rotor has 2P=10 magnetic pole, and the synchronous speed of motor is n=12f; Perhaps, N=2, stator have Z=18 empty groove, and rotor has 2P=16 magnetic pole, and the synchronous speed of motor is n=7.5f; Perhaps, N=2, stator have Z=18 empty groove, and rotor has 2P=20 magnetic pole; The synchronous speed of motor is n=6f; Perhaps, N=3, stator have Z=27 empty groove, and rotor has 2P=24 magnetic pole, and the synchronous speed of motor is n=5f; Perhaps, N=3, stator have Z=27 empty groove, and rotor has 2P=30 magnetic pole, and the synchronous speed of motor is n=4f; Perhaps, N=4, stator have Z=36 empty groove, and rotor has 2P=32 magnetic pole, and the synchronous speed of motor is n=3.75f; Perhaps, N=4, stator have Z=36 empty groove, and rotor has 2P=40 magnetic pole, and the synchronous speed of motor is n=3f; Wherein, f is the back-emf frequency.In these preferred versions, the ordering of three-phase winding coil is A-/A-A-B-/B-B-C-/C-C-A, and circulation N time in circumference.
Owing to taked technique scheme, in the utility model, the rotor that a kind of stator can adaptive two kinds of number of magnetic poles, thus make the motor of being produced have the broader range of speeds and broader torque range; On the other hand, the stator of this motor does not have iron core, does not therefore have location torque, is particularly suitable as generator and uses, and its efficient is very high.In the motor of the present utility model, the number of winding is tending towards minimum, and it is minimum that the end of winding is tending towards, and the utilance of winding is tending towards the highest, thereby makes the iron loss of motor and copper loss be tending towards minimum; Simultaneously, its winding configuration and connecting mode are tending towards the most simple and clear, and stock utilization is high and structural manufacturing process is good, and the production cost of motor is tending towards minimum.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the winding construction schematic diagram of the no stator core disc type brushless direct current permanent magnet motor of tradition;
Fig. 2 is the structural representation of disc type three-phase brushless permanent magnet DC motor;
Fig. 3 is the 2P=10 utmost point or 8 utmost points of circular magnet steel, the stator winding structure schematic diagram of Z=9 groove motor;
Fig. 4 is the 2P=10 utmost point or 8 utmost points of fan-shaped magnet steel, the stator winding structure schematic diagram of Z=9 groove motor;
Fig. 5 is the 2P=8 utmost point of circular magnet steel, the rotor disk structural representation of Z=9 groove motor;
Fig. 6 is the 2P=10 utmost point of circular magnet steel, the rotor disk structural representation of Z=9 groove motor;
Fig. 7 is the 2P=8 utmost point of fan-shaped magnet steel, the rotor disk structural representation of Z=9 groove motor;
Fig. 8 is the 2P=10 utmost point of fan-shaped magnet steel, the rotor disk structural representation of Z=9 groove motor;
Fig. 9 is circular magnet steel, the 2P=20 utmost point or 16 utmost points, the stator winding structure schematic diagram of Z=18 groove motor;
Figure 10 is circular magnet steel, the 2P=16 utmost point, the rotor disk structural representation of Z=18 groove motor;
Figure 11 is circular magnet steel, the 2P=20 utmost point, the rotor disk structural representation of Z=18 groove motor.
Among Fig. 2, the 1st, stator, the 2nd, the left rotor dish, the 3rd, right rotor disk, the 4th, left rotor dish magnet steel, the 5th, right rotor disk magnet steel, the 6th, bearing, the 7th, stator axis, 8 is three phase winding lead-out wires, the 9th, Hall element and pcb board, the 10th, motor.
Embodiment
By aforementioned content as can be known, the utility model provides a kind of disc type three-phase brushless permanent magnet DC motor, the number of magnetic poles 2P=8N of its rotor, and perhaps 2P=10N, wherein N is a positive integer; The stator of the utility model motor does not have iron core, claims empty groove number again so the groove of stator is counted Z, and the empty groove of stator is counted Z=9N.N=1,2,3,4 wherein ... 100.
Therefore, every extremely every phase groove number of this motor is q=Z/ (2Pm)=9N/ (8N*3)=3/8, perhaps q=Z/ (2Pm)=9N/ (10N*3)=3/10, and both are all less than 1/2, so claim big utmost point motor or greatly extremely concentrate winding electric machine.Corresponding to every extremely every phase groove several 3/8 or 3/10, every extremely every 3/8 winding coil or 3/10 winding coil arranged mutually of the utility model motor.The utility model motor only has Z concentrated winding, and every phase only has Z/3=3N concentrated winding, and the winding sum of motor is considerably less, has simplified electric machine structure and manufacturing process greatly, has reduced cost; Because make no stator core location torque and iron loss become zero, allow air gap to minimize, the close acquisition of magnetic is improved; Simultaneously winding overhang reduce to conventional motors 1/3～1/6 in addition more, reached and minimized, so copper loss declines to a great extent.Because the stator of the utility model motor does not have iron core, therefore there is not location torque, it is big that the motor pole number is chosen scope, is specially adapted to low speed and directly drives and high-speed driving, is applicable to low speed and generating at a high speed, and its electric efficiency is very high.Wherein:
The slot pitch electrical degree:
After anti-phase be 20 °.
Or
Breadth coefficient:
Pitch percent:
Winding coefficient: K
W1=K
D1K
P1=0.946.
In the utility model, the winding coefficient of motor is 0.946.Because breadth coefficient is 0.96, pitch percent is 0.985 to make that the line counter potential waveform of the utility model motor windings is quite desirable sine wave.
A preferred embodiment of the present utility model as shown in Figure 2, shown in the figure is a disc type three-phase brushless permanent magnet DC motor 10, the magnet steel of its left side rotor disk 2 to the axial physics air gap of stator body 1 is 0.15～1mm, the thickness of stator body is 1～8mm, and stator body 1 to the axial physics air gap of right side rotor disk 3 magnet steel also is 0.15～1mm; Disc type stator body center is a stator axis 7, and bearing 6 is equipped with on the both sides of axle, plays the effect of support rotor dish, and makes maintenance physics air gap between stator and rotor, makes rotor can freely revolve biography, and three phase winding lead-out wires 8 pass from stator axis 7.
In the present embodiment, two linear hall sensors are fixed on the stator 1 by pcb board 9, the air-gap field that the Hall element sensitive direction forms towards the disk rotor magnet steel, so that the variation of responsive air-gap field, two switch Hall transducers are apart from one another by 90 degree electrical degrees.During concrete enforcement, also can adopt three switch Hall transducers to be fixed on the stator by pcb board, the air-gap field that the Hall element sensitive direction forms towards the disk rotor magnet steel, so that the variation of responsive air-gap field, three switch Hall transducers are apart from one another by 120 degree electrical degrees.
In the preferred embodiment of the present utility model, the shape of the permanent magnet on the disk rotor of disc type three-phase brushless permanent magnet DC motor as shown in Figure 5, wherein, number of magnetic poles 2P=8 just round magnet steel (being permanent magnet) is uniform along the disk rotor outside, N, S utmost point magnet steel alternately, aligned gaps 0.1～1mm is the technology gap.The stator corresponding with this rotor as shown in Figure 3, it is similar just round that the Z=9 of stator empty groove also all is, uniform along the disc type stator outside.The center of circle of 9 coils of three phase windings is on the circle of identical radially radius with the center of circle of rotor magnetic steel.Each winding coil is simple annular coil and is filled in the empty groove that three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A; Wherein A represents a coil of A phase winding, and/A represents a bucking coil of A phase winding, and B represents a coil of B phase winding, and/B represents a bucking coil of B phase winding, and C represents a coil of C phase winding, and/C represents a bucking coil of C phase winding.Form of its winding and connecting mode are very simple and clear, easily the automation machine around.In the present embodiment, the processing of magnet steel ratio is easier to, and the processing of annular coil is then easier, the more approaching desirable sine wave of its line counter potential waveform.During concrete enforcement, wherein each just round magnet steel also can be designed to the oval magnet steel of normal direction, and be corresponding, and this moment, Z=9 empty groove of stator also all was similar normal direction ellipse.
In another preferred embodiment of the present utility model, the shape of the permanent magnet on the disk rotor as shown in Figure 6, wherein, number of magnetic poles 2P=10 same adopts just round magnet steel; The stator of Pei Heing as shown in Figure 3 with it.Three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A.Other aspects are with embodiment illustrated in fig. 5 identical.During concrete enforcement, wherein each just round magnet steel also can be designed to the oval magnet steel of normal direction, and be corresponding, and this moment, Z=9 empty groove of stator also all was similar normal direction ellipse.
In another preferred embodiment of the present utility model, the shape of the permanent magnet on the disk rotor as shown in Figure 7, number of magnetic poles 2P=8 wherein, what wherein adopt is fan-shaped magnet steel, N, S utmost point magnet steel alternately, aligned gaps 0.1～1mm is the technology gap.With it Dui Ying stator as shown in Figure 4, stator Z=9 empty groove also all is similar sector, and is uniform along the disc type stator outside.The geometric center of 9 sector (-shaped) coils of three phase windings is on the circle of identical radially radius with the geometric center of the fan-shaped magnet steel of rotor.Each winding coil is fan-shaped and is filled in the empty groove that three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A.The advantage of this magnet steel shape is to produce a first-harmonic air-gap field and the triple-frequency harmonics air-gap field component that amplitude is a fundamental voltage amplitude about 1/6, and synthetic air-gap field is a fundamental wave magnetic field and the air-gap field that triple-frequency harmonics is synthetic.The air-gap field of this injection third-harmonic component has improved about 15% the magnetic steel of motor utilance, corresponding having increased about 15% of exerting oneself of motor.Because described motor is a three phase electric machine, triple-frequency harmonics magnetic field can not produce the electromagnetic torque fluctuation.
In another preferred embodiment of the present utility model, the shape of the permanent magnet on the disk rotor as shown in Figure 8, number of magnetic poles 2P=10 wherein, it is same that what adopt is fan-shaped magnet steel; Correspondence as shown in Figure 4 with it.Each winding coil is fan-shaped, and three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A.Other aspects are with embodiment illustrated in fig. 7 identical.
As can be seen from the above-described embodiment, the rotor that a kind of stator can adaptive two kinds of number of magnetic poles, thus make the motor of being produced have broader range of motor speeds and broader torque range.
Among aforementioned several embodiment, the rotor that the stator of Fig. 3 adds Fig. 5 is one group, N=1 wherein, and promptly stator has Z=9 empty groove, and rotor has 2P=8 magnetic pole, n=60f/P=15f, being shaped as of empty groove and magnetic pole is just round; The rotor that the stator of Fig. 3 adds Fig. 6 is one group, N=1 wherein, and promptly stator has Z=9 empty groove, and rotor has 2P=10 magnetic pole, n=60f/P=12f, being shaped as of empty groove and magnetic pole is just round; The rotor that the stator of Fig. 4 adds Fig. 7 is one group, N=1 wherein, and promptly stator has Z=9 empty groove, and rotor has 2P=8 magnetic pole, n=60f/P=15f, being shaped as of empty groove and magnetic pole is fan-shaped; The rotor that the stator of Fig. 4 adds Fig. 8 is one group, N=1 wherein, and promptly stator has Z=9 empty groove, and rotor has 2P=10 magnetic pole, n=60f/P=12f, being shaped as of empty groove and magnetic pole is fan-shaped.
It is one group that stator as shown in Figure 9 adds rotor shown in Figure 10, N=2 wherein, be that stator has Z=18 empty groove, rotor has 2P=16 magnetic pole, three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A, circulate altogether 2 times, the synchronous speed of motor is n=60f/P=7.5f, and being shaped as of empty groove and magnetic pole is just round.
It is one group that stator as shown in Figure 9 adds rotor shown in Figure 11, N=2 wherein, be that stator has Z=18 empty groove, rotor has 2P=20 magnetic pole, three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A, circulate altogether 2 times, the synchronous speed of motor is n=6f, and being shaped as of empty groove and magnetic pole is just round.
Except these combinations, the utility model also can have other execution modes, for example:
(1) N=3, promptly stator has Z=27 empty groove, and rotor has 2P=24 magnetic pole, and three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A, circulate altogether 3 times, and the synchronous speed of motor is n=5f;
(2) N=3, promptly stator has Z=27 empty groove, and rotor has 2P=30 magnetic pole, and three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A, circulate altogether 3 times, and the synchronous speed of motor is n=4f, f is the back-emf frequency;
(3) N=4, promptly stator has Z=36 empty groove, and rotor has 2P=32 magnetic pole, and three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A, circulate altogether 4 times, and the synchronous speed of motor is n=3.75f;
(4) N=4, promptly stator has Z=36 empty groove, and rotor has 2P=40 magnetic pole, and three phase winding orderings are A-/A-A-B-/B-B-C-/C-C-A, circulate altogether 4 times, and the synchronous speed of motor is n=3f.
Certainly, count under the condition of this prerequisite of Z=9N at the empty groove of the number of magnetic poles 2P=8N that satisfies rotor or 2P=10N and stator, the utility model can also have other combination execution mode.
Claims (8)
1, a kind of disc type three-phase brushless permanent magnet DC motor, wherein, many permanent magnets extremely alternate to N, S are housed respectively on two disk rotors, and the permanent magnet S utmost point of the permanent magnet N utmost point on first disk rotor on second disk rotor is to produce axial air-gap magnetic field; In the empty groove of coreless disc type stator three phase windings are installed;
It is characterized in that, the number of magnetic poles 2P=8N of described rotor, perhaps 2P=10N, wherein N is a positive integer; The empty groove of described stator is counted Z=9N, three phase windings have 9N coil, every have 3N coil mutually, the ordering of the three-phase winding coil in the individual empty groove of the 9N of described stator is A-/A-A-B-/B-B-C-/C-C-A, and circulation N time in circumference, wherein A represents a coil of A phase winding, and/A represents a bucking coil of A phase winding, B ,/B, C ,/C is by that analogy.
2, disc type three-phase brushless permanent magnet DC motor according to claim 1, it is characterized in that, being shaped as of each permanent magnet just justified or the normal direction ellipse on the described disk rotor, described each permanent magnet is uniform along the disk rotor outside, and same epitrochanterian permanent magnet N, S utmost point aligned gaps are 0.1～1mm technology gap; The shape of the empty groove of each of described stator is just circle or the normal direction ellipse corresponding with each permanent magnet on the described disk rotor, and uniform along the disc type stator outside; The center of circle of each permanent magnet is on the circle of identical radially radius on the center of circle of described three a phase winding 9N coil and the described disk rotor, and each coil is simple annular coil and is filled in the described empty groove.
3, there is not iron core external rotor three-phase brushless DC machine according to the described disc type of claim 1, it is characterized in that, on the described disk rotor each permanent magnet be shaped as fan-shaped, described each permanent magnet is uniform along the disk rotor outside, and same epitrochanterian permanent magnet N, S utmost point aligned gaps are 0.1～1mm technology gap; The shape of the empty groove of each of described stator is corresponding with each permanent magnet on the described disk rotor fan-shaped, and uniform along the disc type stator outside; The geometric center of each fan-shaped permanent magnet is on the circle of identical radially radius on the geometric center of described three a phase winding 9N coil and the disk rotor, and each coil is fan-shaped and is filled in the described empty groove.
According to the described disc type three-phase brushless of claim 1 permanent magnet DC motor, it is characterized in that 4, the axial physics air gap on the described disk rotor between each permanent magnet and the stator is 0.15～1mm, the thickness of described stator is 1～8mm; Described stator center is equipped with stator axis, and bearing is equipped with on the both sides of described stator axis, and described disk rotor is loaded on respectively on one of them bearing.
According to the described disc type three-phase brushless of claim 4 permanent magnet DC motor, it is characterized in that 5, the lead-in wire of described three phase windings passes from the stator axis hole of local hollow.
6, according to the described disc type three-phase brushless of claim 1 permanent magnet DC motor, it is characterized in that, wherein be provided with two linear hall sensors, both spend electrical degrees apart from one another by 90, and are fixed on the stator by pcb board; The air-gap field that the sensitive direction of described Hall element forms towards rotor permanent magnet is with the variation of sensing air-gap field.
7, according to the described disc type three-phase brushless of claim 1 permanent magnet DC motor, it is characterized in that, wherein be provided with three switch Hall transducers, the three spends electrical degrees apart from one another by 120, and is fixed on the stator by pcb board; The air-gap field that the sensitive direction of described Hall element forms towards rotor permanent magnet is with the variation of sensing air-gap field.
8, according to each described disc type three-phase brushless permanent magnet DC motor among the claim 1-7, it is characterized in that, wherein: N=1, promptly stator has Z=9 empty groove, and rotor has 2P=8 magnetic pole, and the synchronous speed of motor is n=15f;
Perhaps, N=1, stator have Z=9 empty groove, and rotor has 2P=10 magnetic pole, and the synchronous speed of motor is n=12f;
Perhaps, N=2, stator have Z=18 empty groove, and rotor has 2P=16 magnetic pole, and the synchronous speed of motor is n=7.5f;
Perhaps, N=2, stator have Z=18 empty groove, and rotor has 2P=20 magnetic pole; The synchronous speed of motor is n=6f;
Perhaps, N=3, stator have Z=27 empty groove, and rotor has 2P=24 magnetic pole, and the synchronous speed of motor is n=5f;
Perhaps, N=3, stator have Z=27 empty groove, and rotor has 2P=30 magnetic pole, and the synchronous speed of motor is n=4f;
Perhaps, N=4, stator have Z=36 empty groove, and rotor has 2P=32 magnetic pole, and the synchronous speed of motor is n=3.75f;
Perhaps, N=4, stator have Z=36 empty groove, and rotor has 2P=40 magnetic pole, and the synchronous speed of motor is n=3f;
Wherein, f is the back-emf frequency.
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| CNU2007201727428U CN201118413Y (en) | 2007-10-29 | 2007-10-29 | Disk three-phase brushless permanent magnetic DC electromotor |
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| CN106451848A (en) * | 2016-09-30 | 2017-02-22 | 徐州鸿润达电动车有限公司 | PCB (Printed Circuit Board)-stator permanent-magnet differential motor of electromobile |
| WO2020108250A1 (en) * | 2018-11-27 | 2020-06-04 | 深圳核心医疗科技有限公司 | Disc-type electric motor |
| CN110030916A (en) * | 2019-04-18 | 2019-07-19 | 安徽拓信电气科技有限公司 | A kind of primary permanent magnet formula linear position sensors |
| CN111934509A (en) * | 2020-07-02 | 2020-11-13 | 陈志涛 | Disc isopgnetic motor |
| CN111934506A (en) * | 2020-08-11 | 2020-11-13 | 哈尔滨工业大学 | Non-overlapping winding axial magnetic field permanent magnet synchronous motor |
| CN111934506B (en) * | 2020-08-11 | 2023-01-13 | 哈尔滨工业大学 | Non-overlapping winding axial magnetic field permanent magnet synchronous motor |
| CN113315333A (en) * | 2021-05-26 | 2021-08-27 | 深圳德技医疗器械有限公司 | No-winding PCB brushless motor |
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