CN216356131U - Motor and electrical equipment - Google Patents
Motor and electrical equipment Download PDFInfo
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- CN216356131U CN216356131U CN202123189657.1U CN202123189657U CN216356131U CN 216356131 U CN216356131 U CN 216356131U CN 202123189657 U CN202123189657 U CN 202123189657U CN 216356131 U CN216356131 U CN 216356131U
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Abstract
The utility model provides a motor and electrical equipment, wherein the motor comprises: the first stator comprises a plurality of first teeth and a plurality of first grooves, the tooth crest width value of the first teeth is a1, and the notch width value of the first grooves is a 2; a second stator including a plurality of second teeth, a second groove being formed between adjacent second teeth, a tooth top width of the second teeth being b1, and a notch width of the second groove being b 2; and the rotor comprises a plurality of permanent magnets and a plurality of magnetic isolation parts, the width of one end of each permanent magnet, facing the first stator, is c1, the width of one end of each magnetic isolation part, facing the first stator, is c2, the width of one end of each permanent magnet, facing the second stator, is d1, and the width of one end of each magnetic isolation part, facing the second stator, is d 2. Through the limitation of relevant sizes in the motor, the torque density of the motor in the running process can be effectively improved, so that the torque of the motor is effectively improved, the torque pulsation and the cogging torque of the motor can be obviously reduced, and the stability of the motor is further improved.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a motor and electrical equipment.
Background
In the related art, a double-stator motor is increasingly applied, and in the running process of the motor, the torque density of the motor in the running process is effectively improved, and the torque ripple and the cogging torque of the motor are reduced to improve the running stability of the motor, so that the problem to be solved urgently is solved.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art.
To this end, a first aspect of the utility model provides an electrical machine.
A second aspect of the utility model provides an electrical appliance.
A first aspect of the utility model provides an electric machine comprising: the stator comprises a first stator and a second stator, wherein the first stator comprises a plurality of first teeth and a plurality of first grooves, the tooth top width value of the first teeth is a1, and the notch width value of the first grooves is a 2; the second stator is arranged on the inner side of the first stator and comprises a plurality of second teeth, a second groove is formed between every two adjacent second teeth, the tooth crest width value of each second tooth is b1, and the notch width value of each second groove is b 2; the rotor is arranged between the first stator and the second stator and comprises a plurality of permanent magnets and magnetic isolation parts which are alternately arranged, the width of one end, facing the first stator, of each permanent magnet is c1, the width of one end, facing the first stator, of each magnetic isolation part is c2, the width of one end, facing the second stator, of each permanent magnet is d1, and the width of one end, facing the second stator, of each magnetic isolation part is d 2; wherein the motor satisfies at least one of:
a value present in said plurality of said a1 and said a2 is a first value L1, a value present in said plurality of said c1 and said c2 is a second value L2, and satisfies | -L1-L2 | ÷ L1 ≦ 0.15, or | -L1-L2 | ÷ L2 ≦ 0.15;
a value present in said plurality of b1 and said plurality of b2 is a third value L3 and a value present in said plurality of d1 and said plurality of d2 is a fourth value L4, satisfying | -L3-L4 | ÷ L3 ≦ 0.15 or | -L3-L4 | ÷ L4 ≦ 0.15.
The motor provided by the utility model comprises a first stator and a second stator, wherein the first stator and the second stator are coaxially arranged, the second stator is positioned at the inner side of the first stator, further, a rotor is arranged between the first stator and the second stator, and the rotor, the first stator and the second stator are coaxially arranged. The motor provided by the utility model can effectively improve the power density in the motor operation process, enhance the power distribution performance of the motor, and also can obviously improve the torque density in the motor operation process, thereby obviously improving the torque of the motor and ensuring the operation requirements of the motor on high rotating speed and high torque. Compared with the related art, the motor performance is guaranteed, meanwhile, the radial size of the motor can be effectively reduced, and the motor is beneficial to miniaturization design.
Specifically, the first stator may include a plurality of first teeth, and the plurality of first teeth are annularly arranged to form an annular first stator, and further, a first groove is formed between adjacent first teeth; correspondingly, the second stator may include a plurality of second teeth, and the plurality of second teeth are arranged in an annular shape, and a diameter of the annular shape formed by the arrangement of the second teeth is smaller than a diameter of the annular shape formed by the arrangement of the plurality of first teeth, so that the second stator may be sleeved inside the first stator, and a space is formed between the first stator and the second stator.
Further, the motor also comprises a rotor, the rotor comprises a plurality of permanent magnets and a plurality of magnetism isolating parts, and the number of the permanent magnets is the same as that of the magnetism isolating parts. Further, a plurality of permanent magnets and a plurality of magnetism portion of separating arrange in turn and form the ring-type to make the rotor subassembly can set up with first stator and second stator is concentric, wherein, the diameter of rotor subassembly can set up to be greater than the diameter of first stator and be less than the diameter of second stator, and then guarantee that the rotor subassembly can overlap and locate between first stator and the second stator. Through a plurality of permanent magnets and a plurality of magnetic isolation parts arranged in turn, a magnetic field loop can be effectively formed between the stator and the rotor by the magnetic field of the permanent magnets, and then the winding and the magnetic field of the permanent magnets can be effectively matched to ensure the operation effect of the motor.
Further, the tooth top width of the first tooth is a1, and the notch width of the first groove is a 2; the tooth crest width value of the second tooth is b1, and the notch width value of the second groove is b 2; the width of the permanent magnet towards one end of the first stator is c1, the width of the magnetism isolating part towards one end of the first stator is c2, the width of the permanent magnet towards one end of the second stator is d1, and the width of the magnetism isolating part towards one end of the second stator is d 2. And, the motor satisfies at least one of:
a value of a plurality of a1 and a plurality of a2 is a first value L1, a value of a plurality of c1 and a plurality of c2 is a second value L2, and the requirements of | -L1-L2 | ÷ L1 ≦ 0.15, or | -L1-L2 | ÷ L2 ≦ 0.15;
a value present in b1 and b2 is the third value L3 and a value present in d1 and d2 is the fourth value L4, which satisfies | -L3-L4 | ÷ L3 ≦ 0.15 or | -L3-L4 | ÷ L4 ≦ 0.15.
Specifically, the motor provided by the utility model can also meet the conditions.
According to the motor provided by the utility model, the first stator and the second stator are radially arranged to form a radial double-stator structure of the motor, so that the rotor of the motor can be arranged between the first stator and the second stator, the power density of the motor in the operation process is effectively improved, the power distribution performance of the motor is enhanced, the radial volume of the motor can be effectively reduced, and the motor is beneficial to the miniaturization design. Further, through the limitation of the relation between the relevant size in the first stator and the relevant size of the rotor and the limitation of the relevant size in the second stator and the relevant size of the rotor, the torque density of the motor in the running process can be effectively improved, so that the torque of the motor is effectively improved, and the torque ripple and the cogging torque of the motor can be obviously reduced, so that the stability of the motor is improved.
In addition, according to the motor in the above technical solution provided by the present invention, the following additional technical features may also be provided:
in the above technical solution, further, the following is also satisfied between the first stator and the rotor: | amax-(k1×c1+k2×c2)∣÷amaxLess than or equal to 0.15 or |. amax- (k1 XC 1+ k2 XC 2) | ÷ (k1 XC 1+ k2 XC 2) ≦ 0.15, wherein a ismaxOf a plurality of first tooth crest widths and a plurality of first groovesThe maximum value of the slot width, k1 and k2 are both integers greater than or equal to 1; and/or the second stator and the rotor further satisfy: | bmax-(k3×d1+k4×d2)∣÷bmaxNot more than 0.15 or | bmax- (k3 × d1+ k4 × d2) | ÷ (k3 × d1+ k4 × d2) ≦ 0.15, wherein b ismaxEach of k3 and k4 is an integer greater than or equal to 1, which is the maximum of the tooth crest width of the plurality of second teeth and the notch width of the plurality of second grooves.
In this embodiment, the maximum value of the crest width a1 of the first teeth and the notch width a2 of the first grooves is denoted as amax，amaxSatisfies the following conditions: | amax-(k1×c1+k2×c2)∣÷amaxLess than or equal to 0.15 or |. amax- (k1 × c1+ k2 × c2) | ÷ (k1 × c1+ k2 × c2) ≦ 0.15. That is, the maximum value a among the crest width a1 of the plurality of first teeth and the notch width a2 of the plurality of first groovesmaxK1 times the width c1 of the permanent magnet near the first tooth as k1 × c1, and k2 times the width c2 of the permanent magnet near the first tooth as k2 × c2, amaxThe difference between (k1 × c1+ k2 × c2) and amaxOr the ratio of (k1 × c1+ k2 × c2) is less than or equal to 15%.
Of the tooth crest width b1 of the second teeth and the notch width b2 of the second grooves, the maximum value thereof is denoted by bmax，bmaxSatisfies the following conditions: | bmax-(k3×d1+k4×d2)∣÷bmaxNot more than 0.15 or | bmax- (k3 × d1+ k4 × d2) | ÷ (k3 × d1+ k4 × d2) ≦ 0.15, that is, there is a maximum value b, of the tooth crest width b1 of the second teeth and the notch width b2 of the second groovesmaxThe width b 3 times of b1 of the permanent magnet close to the second tooth side, and the width b 4 times of b2 of the magnetic separation part close to the second tooth side, bmaxThe difference between (k3 × d1+ k4 × d2) and bmaxOr the ratio of (k3 × d1+ k4 × d2) is less than or equal to 15%.
Further, the motor provided by the utility model can also meet the conditions.
That is, the motor of the present invention, on the basis of composing the radial double-stator structure of the motor by radially arranging the first stator and the second stator, so that the rotor of the motor can be arranged between the first stator and the second stator, thereby effectively improving the power density during the operation of the motor and enhancing the power distribution performance of the motor, further by defining the maximum value of the tooth crest width value a1 of the plurality of first teeth and the slot mouth width value a2 of the plurality of first slots, the relationship between the width value c1 and the width value c2 of the permanent magnet and the magnet-insulating part on the side close to the first stator, and the maximum value of the tooth crest width value b1 of the plurality of second teeth and the slot mouth width value b2 of the plurality of second slots 126, the relationship between the width value d1 and the width value d2 of the permanent magnet and the magnet-insulating part on the side close to the second stator 106, thereby further improving the torque density during the operation of the motor, the torque ripple and the cogging torque of the motor are further reduced, and the stability of the motor is further improved.
In any of the above technical solutions, further, the first stator further includes: the first stator yoke is provided with first teeth, the first teeth are arranged on the inner wall of the first stator yoke, and a first stator slot is formed between every two adjacent first teeth; wherein the first slot includes a first stator slot.
In this technical scheme, first stator can also include first stator yoke portion, and first stator yoke portion specifically can be the annular setting, and further, a plurality of first teeth distribute along the circumference of first stator yoke portion with the inner wall of first stator yoke portion, have first stator groove between two adjacent first teeth, and wherein, first groove includes first stator groove. That is, the width of the notch of the first slot is the width of the first stator slot between two adjacent first teeth.
In any of the above technical solutions, further, the first tooth further includes: a first tooth body connected to the first stator yoke; the first tooth boots are arranged on the first tooth bodies, and a notch of the first stator groove is formed between the two first tooth boots.
In this solution, the first tooth may include a first tooth body connected to the first stator yoke and a first tooth shoe provided on the first tooth body, on the basis of which the notch of the first slot is located between the two first tooth shoes.
Through the arrangement of the first tooth shoe, more harmonic components are introduced into the air gap flux guide, so that the performance of the motor is obviously improved.
In any of the above technical solutions, further, the first stator further includes: a second stator yoke; the plurality of third teeth are arranged on the inner wall of the second stator yoke portion, a second stator slot is arranged between every two adjacent third teeth, the plurality of first teeth are arranged on the third teeth, a groove is formed between every two adjacent first teeth on the same third tooth, and each first slot comprises the second stator slot and the groove.
In this technical solution, the first teeth may specifically include a second stator yoke and a plurality of third teeth disposed on the second stator yoke, and further, the plurality of first teeth are disposed on the third teeth, that is, each third tooth may be disposed with at least two first teeth, that is, the plurality of first teeth are disposed in the form of split teeth on the third tooth. At this time, a groove is formed between two adjacent first teeth, and a second stator slot is formed between two adjacent third teeth, on the basis, the plurality of first slots on the first stator include both the groove and the second stator slot.
That is, when the plurality of first teeth of the first stator are arranged in the form of split teeth on the third teeth, the notch of the first slot includes the width of the second stator slot between two adjacent third teeth and the width of the groove between two adjacent first teeth, and in this case, the width value a2 of the first notch includes the width a3 of the second stator slot and the width value a4 of the groove.
That is, the motor satisfies at least one of:
a value of the plurality of a1, the plurality of a3 and the plurality of a4 is a first value L1, a value of the plurality of c1 and the plurality of c2 is a second value L2, and the requirements of | -L1-L2 | ÷ L1 ≦ 0.15 or | -L1-L2 | ÷ L2 ≦ 0.15 are satisfied;
a value present in b1 and b2 is the third value L3 and a value present in d1 and d2 is the fourth value L4, which satisfies | -L3-L4 | ÷ L3 ≦ 0.15 or | -L3-L4 | ÷ L4 ≦ 0.15.
In any of the above technical solutions, further, the third tooth further includes: a second tooth body connected to the second stator yoke; and the second tooth shoes are arranged on the second tooth bodies, and a notch of the second stator slot is formed between the two second tooth shoes.
In this embodiment, the third tooth may include a second tooth body connected to the second stator yoke and a second tooth shoe disposed on the second tooth body, and on the basis, the second stator slot is located between two adjacent second tooth shoes.
Through the setting of second tooth boots for introduce more harmonic component in the air gap magnetic conductance, like this, make the performance of motor obtain obvious promotion.
In any of the above technical solutions, further, in the radial direction of the motor, an angle of an included angle between a center line of the first slot and a center line of the second tooth is less than or equal to 45/Ns degrees, where Ns is the number of the first slots.
In the technical scheme, a first groove is formed between two adjacent first teeth, the first groove has a groove center line in the radial direction of the first stator, the second tooth has a tooth body center line in the radial direction of the second stator, and an included angle between the groove center line of the first groove and the center line of the second tooth is less than or equal to 45/Ns degrees in the rotation direction of the rotor, wherein Ns is the number of the first grooves. Thereby guarantee the distribution of magnetic field in the motor operation process, and then guarantee the motor steady operation.
According to the motor, the first stator and the second stator are arranged in the radial direction to form a radial double-stator structure of the motor, so that the rotor of the motor can be arranged between the first stator and the second stator, the power density of the motor in the operation process is effectively improved, and the power distribution performance of the motor is enhanced.
In any of the above technical solutions, further, a first air gap is provided between the first stator and the rotor; a second air gap is formed between the second stator and the rotor.
In the technical scheme, the first stator and the second stator are arranged, so that the power density of the motor in the running process can be effectively improved, the power distribution performance of the motor is enhanced, the torque density of the motor in the running process can be obviously improved, the torque of the motor is obviously improved, and the running requirements of the motor on high rotating speed and high torque are met. Furthermore, a first air gap is formed between the first stator and the rotor, and a second air gap is formed between the second stator and the rotor, so that a double-air-gap structure of the motor is realized, the waveform of an air-gap magnetic field between the stator and the rotor is improved in the operation process of the motor, the magnetic field formed by the permanent magnet of the rotor in the air gap is closer to a sine shape, and the cogging torque and the torque fluctuation of the motor can be reduced.
In any of the above technical solutions, further, the motor further includes a winding, and the winding is disposed on at least one of the first stator and the second stator.
In the technical scheme, the first stator or the second stator can be matched with the permanent magnet on the rotor to run through the arrangement of the windings, so that the stable output of the torque and the rotating speed of the motor is ensured, and the running efficiency of the motor is ensured.
In particular, each winding may be disposed on one first tooth body based on the first stator including the first stator yoke, the first tooth including the first tooth body and the first tooth shoe, and correspondingly, each winding may be disposed on one second tooth when the winding is disposed on the second stator. That is to say, the winding is arranged in a concentrated winding mode, so that in the running process of the motor, on the basis of ensuring that an air gap magnetic field has enough sine, the winding process of the winding can be simplified, the manufacturing difficulty of the motor is further reduced, and the manufacturing cost is reduced.
Further, each winding may be simultaneously disposed on two adjacent first tooth bodies.
In any of the above technical solutions, further, the magnetic poles of two adjacent permanent magnets are opposite.
In the technical scheme, the magnetic poles of the two adjacent permanent magnets are set to be opposite, so that the two adjacent permanent magnets form an effective magnetic gathering effect so far, the air gap flux density between the first stator and the second stator of the motor and the rotor assembly is further improved, the motor torque can be effectively improved, the torque fluctuation is reduced, and the motor stability is improved.
In any of the above technical solutions, the magnetic shielding portion further includes a magnetic conductive member and/or a non-magnetic conductive member.
In this technical scheme, the portion of separating magnetism between the adjacent permanent magnet can set up to the magnetic conduction part, specifically, the rotor subassembly can include annular core, and the interval sets up the mounting groove that is used for installing the permanent magnet on annular core, utilizes the body of iron core to form the magnetic bridge simultaneously between the mounting groove, and this magnetic bridge is the portion of separating magnetism promptly to the realization is separated adjacent permanent magnet. Through the arrangement mode, the body structure of the rotor core can be utilized, the processing technology of the rotor assembly is simplified, the processing difficulty is reduced, and therefore the manufacturing cost of the motor is reduced.
Further, the magnetism isolating part can further comprise a non-magnetic conducting component, so that magnetic leakage of the rotor assembly can be effectively avoided, the magnetic flux density in the running process of the motor is improved, and the running effect of the motor is guaranteed.
In any of the above technical solutions, further, the permanent magnet is wrapped with ferrite or a rare earth permanent magnet.
In the technical scheme, the ferrite or rare earth permanent magnet has good magnetic energy, and the ferrite or rare earth permanent magnet is used as the permanent magnet of the rotor assembly, so that the permanent magnet can effectively provide magnetic energy for a long time, and the long-term stable operation of the motor is further ensured.
In any of the above technical solutions, further, the number of pole pairs of the winding satisfies the following relation: pa | -Ns ± Zr/2 |; wherein Pa is the number of pole pairs of the winding, Ns is the number of the first slots, and Zr is the number of the magnetism isolating parts.
In the technical scheme, the normal operation of the motor is ensured by limiting the number of the pole pairs of the winding, and a new harmonic component appearing in the air gap flux density can be used as a working harmonic of the motor to provide output torque for the motor, so that the torque density of the motor is effectively improved. Specifically, the pole pair number of the winding of the motor satisfies the following relation: pa | -Ns ± Zr/2 |; pa is the pole pair number of the winding of the motor, Ns is the total number of the first slots, and Zr is the number of the magnetism isolating parts.
According to a second aspect of the utility model, an electrical apparatus is proposed, comprising the electric machine of any of the above-mentioned technical solutions.
The electric equipment provided by the utility model comprises the motor in any one of the technical schemes, so that the electric equipment has all the beneficial effects of the motor, and the details are not repeated.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present invention;
FIG. 2 shows a schematic view of the first and second stators of FIG. 1;
FIG. 3 shows a schematic structural view of the rotor of FIG. 1;
fig. 4 is a schematic structural diagram illustrating a first stator in a motor according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating a motor according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a motor according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram illustrating a motor according to another embodiment of the present invention;
fig. 8 is a schematic structural view illustrating a motor according to still another embodiment of the present invention;
fig. 9 is a schematic structural view illustrating a motor according to still another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a motor according to another embodiment of the present invention.
Wherein, the corresponding relationship between the reference numbers and the components in fig. 1 to 10 is:
100 electric machine, 102 first stator, 104 first tooth, 106 second stator, 108 second tooth, 110 rotor, 112 permanent magnet, 114 flux barrier, 116 first stator yoke, 118 first tooth body, 120 first tooth shoe, 122 winding, 124 first slot, 126 second slot, 130 second stator yoke, 132 third tooth, 134 second stator slot, 136 second tooth body, 138 second tooth shoe, 140 groove, 142 third stator yoke, 144 first air gap, 146 second air gap.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
An electric machine 100 and an electric appliance provided according to some embodiments of the present invention are described below with reference to fig. 1 to 10.
One embodiment of the present invention proposes a motor 100, as shown in fig. 1, 2 and 3, including: the stator comprises a first stator 102, the first stator 102 comprises a plurality of first teeth 104 and a plurality of first grooves 124, a second stator 106 is arranged on the inner side of the first stator 102, the second stator 106 comprises a plurality of second teeth 108, the plurality of second teeth 108 are annularly arranged, a second groove 126 is formed between every two adjacent second teeth 108, a rotor 110 is arranged between the first stator 102 and the second stator 106, the rotor 110 comprises a plurality of permanent magnets 112 and a plurality of magnetism isolating parts 114, and the permanent magnets 112 and the magnetism isolating parts 114 are alternately arranged.
The motor 100 provided by the utility model comprises a first stator 102 and a second stator 106, wherein the first stator 102 and the second stator 106 are coaxially arranged, the first stator 102 is positioned outside the second stator 106, further, a rotor 110 is arranged between the first stator 102 and the second stator 106, and the rotor 110 is coaxially arranged with both the first stator 102 and the second stator 106. The motor provided by the utility model can effectively improve the power density of the motor 100 in the operation process, enhance the power distribution performance of the motor 100, and also can obviously improve the torque density of the motor 100 in the operation process, thereby obviously improving the torque of the motor 100 and ensuring the operation requirements of the motor 100 on high rotating speed and high torque. Compared with the related art, the radial volume of the motor 100 can be effectively reduced while the performance of the motor 100 is ensured, and the motor 100 is beneficial to miniaturization design.
Specifically, the first stator 102 may include a plurality of first teeth 104, and the plurality of first teeth 104 are arranged in a ring shape, and further, a first slot 124 is provided between adjacent first teeth 104; accordingly, the second stator 106 may include a plurality of second teeth 108, the plurality of second teeth 108 are arranged in a ring shape, and the second stator 106 is disposed inside the first stator 102, and a spacing space is formed between the first stator 102 and the second stator 106.
Further, as shown in fig. 3, the motor 100 further includes a rotor 110, the rotor 110 includes a plurality of permanent magnets 112 and a plurality of magnetism isolating parts 114, and the number of the permanent magnets 112 and the number of the magnetism isolating parts 114 are the same. And, as shown by arrows in fig. 1 and 3, the magnetizing directions of the adjacent two permanent magnets 112 are opposite. Further, the plurality of permanent magnets 112 and the plurality of magnetic barriers 114 are alternately arranged and formed in a ring shape, so that the rotor 110 can be concentrically disposed with the first stator 102 and the second stator 106, wherein the rotor 110 can be sleeved between the first stator 102 and the second stator 106. Through the alternate arrangement of the permanent magnets 112 and the magnetic isolation parts 114, the magnetic field of the permanent magnets 112 can effectively form a magnetic field loop between the first stator 102, the second stator 106 and the rotor 110, and further, the effective matching between the magnetic fields of the windings 122 and the permanent magnets 112 can be ensured, so as to ensure the operation effect of the motor 100.
Further, the tooth top width of the first tooth 104 is a1, and the notch width of the first groove 124 is a 2; the tooth crest width of the second tooth 108 is b1, and the notch width of the second groove 126 is b 2; the width of the permanent magnet 112 facing the end of the first stator 102 is c1, the width of the magnetic shielding part 114 facing the end of the first stator 102 is c2, the width of the permanent magnet 112 facing the end of the second stator 106 is d1, and the width of the magnetic shielding part 114 facing the end of the second stator 106 is d 2. Also, the motor 100 satisfies at least one of:
a value of a plurality of a1 and a plurality of a2 is a first value L1, a value of a plurality of c1 and a plurality of c2 is a second value L2, and the requirements of | -L1-L2 | ÷ L1 ≦ 0.15, or | -L1-L2 | ÷ L2 ≦ 0.15;
a value present in b1 and b2 is the third value L3 and a value present in d1 and d2 is the fourth value L4, which satisfies | -L3-L4 | ÷ L3 ≦ 0.15 or | -L3-L4 | ÷ L4 ≦ 0.15.
Specifically, the motor 100 may satisfy at least one of the following conditions:
the first value L1 is one of the tooth top width values a1 of the plurality of first teeth 104, and the second value L2 is one of the width values c1 of the plurality of permanent magnets 112 toward one end of the first stator 102. That is, there is one a1 and c1, and: |. a1-c1 | _ a1 ≦ 0.15, or |. a1-c1 | _ c1 ≦ 0.15. Further, a1 and c1 may satisfy: |. a1-c1 | _ a1 ≦ 0.1, or |. a1-c1 | _ c1 ≦ 0.1.
The first value L1 is one of the tooth top width values a1 of the first teeth 104, and the second value L2 is one of the width values c2 of the magnetic shielding portions 114 toward the end of the first stator 102. That is, there is one a1 and c2, and: |. a1-c2 | _ a1 ≦ 0.15, or |. a1-c2 | _ c2 ≦ 0.15. Further, a1 and c2 may satisfy: |. a1-c2 | _ a1 ≦ 0.1, or |. a1-c2 | _ c2 ≦ 0.1.
The first value L1 is one of the slot opening width values a2 of the plurality of first slots 124, and the second value L2 is one of the width values c1 of the plurality of permanent magnets 112 toward one end of the first stator 102. That is, there is one a2 and c1, and: |. a2-c1 | _ a2 ≦ 0.15, or |. a2-c1 | _ c1 ≦ 0.15. Further, a2 and c1 may satisfy: |. a2-c1 | _ a2 ≦ 0.1, or |. a2-c1 | _ c1 ≦ 0.1.
The first value L1 is one of the slot opening width values a2 of the first slots 124, and the second value L2 is one of the width values c2 of the ends of the magnetic shields 114 facing the first stator 102. That is, there is one a2 and c2, and: |. a2-c2 | _ a2 ≦ 0.15, or |. a2-c2 | _ c1 ≦ 0.15. Further, a2 and c2 may satisfy: |. a2-c2 | _ a2 ≦ 0.1, or |. a2-c2 | _ c1 ≦ 0.1.
The third value L3 is one of the tooth crest width values b1 of the plurality of second teeth 108, and the fourth value L4 is one of the width values d1 of the plurality of permanent magnets 112 toward one end of the second stator 106. That is, there is one b1 and d1, and: | -b 1-d1 | _ b1 ≦ 0.15, or | -b 1-d1 | _ d1 ≦ 0.15. Further, b1 and d1 may satisfy: | -b 1-d1 | _ b1 ≦ 0.1, or | -b 1-d1 | _ d1 ≦ 0.1.
The third value L3 is one of the tooth crest width values b1 of the plurality of second teeth 108, and the fourth value L4 is one of the width values d2 of the plurality of flux barriers 114 toward the end of the second stator 106. That is, there is one b1 and d2, and: | -b 1-d2 | _ b1 ≦ 0.15, or | -b 1-d2 | _ d2 ≦ 0.15. Further, b1 and d2 may satisfy: | -b 1-d2 | _ b1 ≦ 0.1, or | -b 1-d2 | _ d2 ≦ 0.1.
The third value L3 is one of slot opening width values b2 of the plurality of second slots 126, and the fourth value L4 is one of width values d1 of the plurality of permanent magnets 112 toward one end of the second stator 106. That is, there is one b2 and d1, and: | -b 2-d1 | _ b2 ≦ 0.15, or | -b 2-d1 | _ d1 ≦ 0.15. Further, b2 and d1 may satisfy: | -b 2-d1 | _ b2 ≦ 0.1, or | -b 2-d1 | _ d1 ≦ 0.1.
The third value L3 is one of the slot opening width values b2 of the second slots 126, and the fourth value L4 is one of the width values d2 of the ends of the magnetic shields 114 facing the second stator 106. That is, there is one b2 and d2, and: | -b 2-d2 | _ b2 ≦ 0.15, or | -b 2-d2 | _ d2 ≦ 0.15. Further, b2 and d2 may satisfy: | -b 2-d2 | _ b2 ≦ 0.1, or | -b 2-d2 | _ d2 ≦ 0.1.
According to the motor 100 provided by the utility model, the first stator 102 and the second stator 106 are radially arranged, so that the rotor 110 of the motor 100 can be arranged between the first stator 102 and the second stator 106, the power density of the motor 100 in the operation process is effectively improved, the power distribution performance of the motor 100 is enhanced, the radial volume of the motor 100 can be effectively reduced, and the miniaturization design of the motor 100 is facilitated. Further, by defining the relationship between the relevant dimension of the first stator 102 and the relevant dimension of the rotor 110, and defining the relevant dimension of the second stator 106 and the relevant dimension of the rotor 110, the torque density of the motor 100 during operation can be effectively improved, so that the torque of the motor 100 can be effectively improved, and the torque ripple and the cogging torque of the motor 100 can be obviously reduced, so that the stability of the motor 100 can be improved.
Specifically, as shown in table 1, in case of case 1, case 2 and case 3, the tooth top width value b1 of the second tooth 108 is 1.86, the width value d1 of the end of the permanent magnet 112 facing the second stator 106 is 2.05, | b1-d1 | ÷ b1 ═ 0.09, | b1-d1 | ÷ d1 ═ 0.1, and it can be seen that the ratio of the difference between b1 and d1 to b1 or d1 is less than or equal to 10%, when the cogging torque is 4mNm, 14mNm and 6mNm, respectively; in case 4, the tooth top width a1 of the first tooth 104 is 4.2, the width c2 of the end of the magnetism isolating portion 114 facing the first stator 102 is 4.28, | a1-c2 | ÷ a1 ═ 0.02, | a1-c2 | ÷ c2 ═ 0.02, and it can be seen that the ratio of the difference between a1 and c2 to a1 or c2 is less than or equal to 10%, and the cogging torque is 29 mNm. In case 5, the tooth top width a1 of the first tooth 104 is 3, the width c1 of the permanent magnet 112 towards the end of the first stator 102 is 3.4, | a1-c1 | ÷ a1 ═ 0.13, | a1-c1 | ÷ c1 ═ 0.12, and it can be seen that the ratio of the difference between a1 and c1 to a1 or c1 is less than 15%, and the cogging torque is 40 mNm.
As can be seen from the above data, by setting the ratio of the difference between the relevant dimension of the first stator 102 and the relevant dimension of the rotor 110 to the relevant dimension of the first stator 102 or the rotor 110 to be less than or equal to 15%, or setting the ratio of the difference between the relevant dimension of the second stator 106 and the relevant dimension of the rotor 110 to the relevant dimension of the second stator 106 or the rotor 110 to be less than or equal to 15%, the cogging torque during the operation of the motor 100 can be effectively suppressed, the cogging torque is prevented from being excessively large, and the stability of the motor is improved. Further, as can be seen from the data in the above-described solutions 1 to 4, by setting the ratio of the difference between b1 and d1 to b1 or d1 to be less than or equal to 10%, or the ratio of the difference between a1 and c2 to a1 or c2 to be less than or equal to 10%, that is, setting the ratio of the difference between the relevant dimension in the first stator 102 and the relevant dimension of the rotor 110 to be less than or equal to 10%, or setting the ratio of the difference between the relevant dimension in the second stator 106 and the relevant dimension of the rotor 110 to be less than or equal to 10%, the cogging torque of the motor 100 can be further reduced, thereby further improving the stability of the motor.
TABLE 1
On the basis of any of the above embodiments, further, as shown in fig. 2 and 3, the following is satisfied between the first stator 102 and the rotor 110: | amax-(k1×c1+k2×d1)∣÷amaxLess than or equal to 0.15, or |. amax- (k1 XC 1+ k2 XC 2) | ÷ (k1 XC 1+ k2 XC 2) ≦ 0.15, wherein a ismaxThe maximum of the crest width of the plurality of first teeth 104 and the notch width of the plurality of first grooves 124, both k1 and k2 being integers greater than or equal to 1; and/or between the second stator 106 and the rotor 110: | bmax-(k3×d1+k4×d2)∣÷bmaxLess than or equal to 0.15, or |, bmax- (k3 × d1+ k4 × d2) | ÷ (k3 × d1+ k4 × d2) ≦ 0.15, wherein b ismaxThe maximum of the crest width of the second plurality of teeth 108 and the notch width of the second plurality of grooves 126, k3 and k4 are each integers greater than or equal to 1.
In this embodiment, of the crest width values a1 of the plurality of first teeth 104 and the notch width values a2 of the plurality of first grooves 124, the maximum value thereof is denoted as amax，amaxSatisfies the following conditions:∣amax-(k1×c1+k2×d1)∣÷amaxless than or equal to 0.15 or |. amax- (k1 × c1+ k2 × c2) | ÷ (k1 × c1+ k2 × c2) ≦ 0.15. That is, amaxThe difference between (k1 × c1+ k2 × c2) and amaxOr a ratio of (k1 × c1+ k2 × c2) less than or equal to 15%, specifically, amaxThe difference between (k1 × c1+ k2 × c2) and amaxOr the ratio of (k1 × c1+ k2 × c2) may be set to be less than or equal to 10%.
Further, with respect to amaxIt should be noted here that the first stator 102 includes a plurality of first teeth 104 and a plurality of first grooves 124, each first tooth 104 has a tooth top width a1, and each first groove 124 has a groove mouth width a 2. At this time, the plurality of crest width values a1 and the plurality of notch width values a2 may form a first set, a being defined in the present inventionmaxIs the largest one of the values in the first set.
Further, of the tooth crest width values b1 of the plurality of second teeth 108 and the notch width values b2 of the plurality of second grooves 126, the maximum value thereof is denoted as bmax，bmaxSatisfies the following conditions: | bmax-(k3×d1+k4×d2)∣÷bmaxNot more than 0.15 or | bmax- (k3 × d1+ k4 × d2) | ÷ (k3 × d1+ k4 × d2) ≦ 0.15, i.e., bmaxThe difference between (k3 × d1+ k4 × d2) and bmaxOr a ratio of (k3 × d1+ k4 × d2) less than or equal to 15%, specifically, bmaxThe difference between (k3 × d1+ k4 × d2) and bmaxOr the ratio of (k3 × d1+ k4 × d2) may be set to be less than or equal to 10%.
Further, with respect to bmaxIt should be noted here that the second stator 106 includes a plurality of second teeth 108 and a plurality of second slots 126, each second tooth 108 has a tooth top width value b1, and each second slot 126 has a slot width value b 2. At this time, the plurality of tooth top width values b1 and the plurality of notch width values b2 may form a second set, b defined in the present inventionmaxIs the largest one of the values in the second set.
Further, the motor 100 provided by the utility model can simultaneously satisfy the following conditions: | amax-(k1×c1+k2×d1)∣÷amaxAxc or | a ≦max- (k1 × c1+ k2 × c2) | ÷ (k1 × c1+ k2 × c2) ≦ 0.1. And | bmax-(k3×d1+k4×d2)∣÷bmaxAxd or | b ≦max-(k3×d1+k4×d2)∣÷(k3×d1+k4×d2)≤0.1。
That is, the motor 100 of the present invention, on the basis of the radial double-stator structure of the motor 100 formed by radially arranging the first stator 102 and the second stator 106, so that the rotor 110 of the motor 100 can be arranged between the first stator 102 and the second stator 106, thereby effectively improving the power density during the operation of the motor 100 and enhancing the power distribution performance of the motor 100, further by defining the relationship between the maximum value of the tooth crest width value a1 of the plurality of first teeth 104 and the slot mouth width value a2 of the plurality of first slots 124, the width value c1 of the permanent magnet 112 on the side close to the first stator 102, and the width value c2 of the magnetism isolating part 114 on the side close to the first stator 102, and the maximum value of the tooth crest width values b1 of the plurality of second teeth 108 and the slot width values b2 of the plurality of second slots 126, the width value d1 of the permanent magnet 112 on the side close to the second stator 106, and the width value d2 of the magnetism isolating part 114 on the side close to the second stator 106, thereby further increasing the torque density of the motor 100 during operation to further increase the torque of the motor 100, while further reducing the torque ripple and cogging torque of the motor 100 to further increase the stability of the motor 100.
In any of the above embodiments, further, as shown in fig. 2, the first stator 102 further includes: the first stator yoke 116, the first teeth 104 are arranged on the inner wall of the first stator yoke 116, and a first stator slot is arranged between two adjacent first teeth 104; wherein the first slot 124 includes a first stator slot.
In this embodiment, the first stator 102 may further include a first stator yoke 116, the first stator yoke 116 may be specifically configured in an annular shape, and further, the plurality of first teeth 104 are distributed along a circumferential direction of the first stator yoke 116 and an inner wall of the first stator yoke 116, and a first stator slot is provided between two adjacent first teeth 104, where the first slot 124 includes the first stator slot. That is, the notch width of the first slot 124 is the width of the first stator slot between two adjacent first teeth 104.
Further, the first tooth 104 further includes: a first tooth body 118 connected to the first stator yoke 116; the first tooth shoes 120 are disposed on the first tooth body 118, and a notch of the first stator groove is formed between the two first tooth shoes 120.
Specifically, the first tooth 104 may include a first tooth body 118 and a first tooth shoe 120, wherein the first tooth body 118 is connected to the first stator yoke 116, and the first tooth shoe 120 is disposed on the first tooth body 118, and based thereon, the notch of the first slot 124 is located between the two first tooth shoes 120.
Through the arrangement of the first tooth shoe 120, more harmonic components are introduced into the air gap flux guide, so that the performance of the motor 100 is obviously improved.
Specifically, the first tooth body 118 and the first tooth shoe 120 may be detachably connected, and meanwhile, the first tooth body 118 and the first stator yoke 116 may also be detachably connected, that is, a detachable sleeved assembly structure may be disposed between the first tooth body 118 and the first stator yoke 116 and the first tooth shoe 120. By arranging the first tooth body 118, the first tooth shoe 120 and the first stator yoke portion 116 in a detachable sleeved manner, in the process of assembling the first stator 102, a coil may be wound on the first tooth body 118, one end of the first tooth body 118 is connected to the first stator yoke portion 116, and finally the first tooth shoe 120 is mounted to the other end of the first tooth body 118. Therefore, the simplified winding process in the assembly process of the first stator 102 is realized, the winding difficulty is reduced, the slot fullness rate of the winding is improved, the output performance of the motor 100 is improved, meanwhile, waste materials can be reduced, and the waste of materials is reduced.
Specifically, the first tooth body 118 and the first stator yoke 116 may be connected through a concave-convex structure, that is, a groove or a protrusion is provided at one end of the first tooth body 118, and correspondingly, a protrusion or a groove matched with the groove or the protrusion is provided at a corresponding position of the first stator yoke 116, so that the connection between the first tooth body 118 and the first stator yoke 116 may be achieved through the matching of the groove and the protrusion.
Accordingly, the first tooth body 118 and the first tooth shoe 120 can also be connected by a concave-convex structure, that is, the first tooth shoe 120 and the first tooth body 118 are connected by mutually matching protrusions and grooves, so as to simplify the winding process.
In any of the above embodiments, further, as shown in fig. 4, the first stator 102 further includes: a second stator yoke 130; and a plurality of third teeth 132 disposed on an inner wall of the second stator yoke 130, a second stator slot 134 is disposed between two adjacent third teeth 132, a plurality of first teeth 104 are disposed on the third teeth 132, and a groove 140 is disposed between two adjacent first teeth 104 on the same third tooth 132, wherein the first slot 124 includes the second stator slot 134 and the groove 140.
In this embodiment, the first teeth 104 may specifically include a second stator yoke 130 and a plurality of third teeth 132 disposed on the second stator yoke 130, and further, a plurality of first teeth 104 are disposed on the third teeth 132, that is, each third tooth 132 may have at least two first teeth 104 disposed thereon, that is, the plurality of first teeth 104 are disposed in the form of split teeth on the third teeth 132. At this time, a groove 140 is formed between two adjacent first teeth 104, and a second stator slot 134 is formed between two adjacent third teeth 132, and on this basis, the plurality of first slots 124 on the first stator 102 includes both the groove 140 and the second stator slot 134.
That is, when the plurality of first teeth 104 of the first stator 102 are arranged in the form of split teeth on the third teeth 132, the notch of the first slot 124 includes the width of the second stator slot 134 between two adjacent third teeth 132 and the width of the groove 140 between two adjacent first teeth 104, and at this time, the width value a2 of the notch of the first slot 124 includes the width a3 of the second stator slot 134 or the width value a4 of the groove 140, that is, there is a difference between one of the tooth top width of the first tooth 104, the width of the second stator slot 134 between the third teeth 132, and the width of the groove 140 between two adjacent first teeth 104 and one of the width values of the permanent magnet 112 or the magnetic partition 114 on the side close to the first teeth 104, which is less than or equal to 15%.
That is, the motor 100 satisfies at least one of:
a value of the plurality of a1, the plurality of a3 and the plurality of a4 is a first value L1, a value of the plurality of c1 and the plurality of c2 is a second value L2, and the requirements of | -L1-L2 | ÷ L1 ≦ 0.15 or | -L1-L2 | ÷ L2 ≦ 0.15 are satisfied;
a value present in b1 and b2 is the third value L3 and a value present in d1 and d2 is the fourth value L4, which satisfies | -L3-L4 | ÷ L3 ≦ 0.15 or | -L3-L4 | ÷ L4 ≦ 0.15.
Further, the third tooth 132 further includes: a second yoke 136 connected to the second stator yoke 130; and a second tooth shoe 138 disposed on the second tooth body 136, wherein a notch of the second stator slot 134 is formed between the two second tooth shoes 138.
Specifically, the third tooth 132 may include a second tooth body 136 and a second tooth shoe 138, wherein the second tooth body 136 is connected to the second stator yoke 130, and the second tooth shoe 138 is disposed on the second tooth body 136, and on the basis thereof, the second stator slot 134 is located between two adjacent second tooth shoes 138.
Through the arrangement of the second tooth shoe 138, more harmonic components are introduced into the air gap flux guide, so that the performance of the motor 100 is obviously improved.
In any of the above embodiments, further, in the radial direction of the electric machine 100, the angle between the centerline of the first slot 124 and the centerline of the second tooth 108 is less than or equal to 45/Ns degrees, where Ns is the number of first slots.
In this embodiment, based on the first stator 102 comprising the first stator yoke 116, the first slot 124 is formed between two adjacent first teeth 104, and an included angle between a center line of the first slot 124 and a center line of the second tooth 108 in the rotation direction of the rotor 110 is less than or equal to 45/Ns degrees, where Ns is the number of the first slots 124. Thereby ensuring the distribution of magnetic field during the operation of the motor 100 and further ensuring the stable operation of the motor 100.
Further, based on the first stator 102 comprising the second stator yoke 130 and the plurality of third teeth 132, the plurality of first teeth 104 are disposed on the third teeth 132, a groove 140 is formed between two adjacent first teeth 104, the first slot 124 comprises a second stator slot 134 and a groove 140 between two adjacent third teeth 132, an included angle between a center line of the second stator slot 134 or a center line of the groove 140 and a center line of the second tooth 108 is less than or equal to 45/Ns degrees in the rotation direction of the rotor 110, wherein Ns is the number of the first slots 124, that is, the sum of the number of the second stator slots 134 and the number of the grooves 140. Thereby ensuring the distribution of magnetic field during the operation of the motor 100 and further ensuring the stable operation of the motor 100.
According to the motor 100, the first stator 102 and the second stator 106 are radially arranged, so that the rotor 110 of the motor 100 can be arranged between the first stator 102 and the second stator 106, the power density of the motor 100 in the operation process is effectively improved, and the power distribution performance of the motor 100 is enhanced, and further, the magnetic density of the first stator 102, the second stator 106 and the rotor 110 in the operation process of the motor 100 can be effectively improved by limiting the angle between the first stator 102 and the second stator 106, so that the loss of the motor 100 is effectively reduced, and the operation efficiency of the motor 100 is improved.
In any of the above embodiments, further, as shown in fig. 5, there is a first air gap 144 between the first stator 102 and the rotor 110; a second air gap 146 is provided between the second stator 106 and the rotor 110.
In this embodiment, by the arrangement of the first stator 102 and the second stator 106, the power density of the motor 100 during the operation process can be effectively increased, the power distribution performance of the motor 100 can be enhanced, the torque density of the motor 100 during the operation process can also be significantly increased, the torque of the motor 100 can be further significantly increased, and the operation requirements of the motor 100 for high rotation speed and high torque can be ensured. Further, a first air gap 144 is formed between the first stator 102 and the rotor 110, and a second air gap 146 is formed between the second stator 106 and the rotor 110, so that a double air gap structure of the motor 100 is realized, and in order to improve the operation process of the motor 100, the waveforms of the air gap magnetic fields between the first stator 102 and the second stator 106 and the rotor 110 respectively are enabled to make the magnetic field formed by the permanent magnets 112 of the rotor 110 in the air gap closer to a sine shape, and therefore the cogging torque and the torque fluctuation of the motor 100 can be reduced.
In any of the above embodiments, further, as shown in fig. 5, 6, 7 and 8, the motor 100 further includes a winding 122, the winding 122 being disposed on at least one of the first stator 102 and the second stator 106.
In this embodiment, through the arrangement of the winding 122, the first stator 102 or the second stator 106 can cooperate with the permanent magnet 112 on the rotor 110 to ensure stable output of the torque and the rotation speed of the motor 100, and ensure the operation efficiency of the motor 100.
Specifically, the windings 122 may be disposed on one of the first stator 102 or the second stator 106 to achieve the requirements of the motor 100 for different magnetic field distributions, and thus different torque outputs of the motor 100. In addition, the winding 122 is disposed on only one of the first stator 102 and the second stator 106, so that on the basis of ensuring the operation efficiency of the motor 100, the material of the winding 122 can be saved, the manufacturing cost of the motor 100 can be effectively reduced, and the manufacturing structure can be simplified.
Further, the winding 122 may be disposed on both the first stator 102 and the second stator 106, so as to improve the magnetic density of the motor 100, and further improve the torque output of the motor 100.
Further, the second stator 106 may include a third stator yoke portion 142, and the winding 122 may be disposed on the first stator yoke portion 116 of the first stator 102 or on the third stator yoke portion 142 of the second stator 106, so as to further improve the magnetic field waveform in the air gaps between the first stator 102 and the second stator 106 and the rotor 110, and further enable the magnetic field formed by the permanent magnet 112 of the rotor 110 in the first air gap 144 and the second air gap 146 to be closer to a sine shape, so as to further reduce the cogging torque and the torque ripple of the motor 100, and further improve the stability of the motor 100 during the operation process.
According to the motor 100, the first stator 102 and the second stator 106 are arranged in the radial direction, so that the rotor 110 of the motor 100 can be arranged between the first stator 102 and the second stator 106, the power density of the motor 100 in the operation process is effectively improved, and the power distribution performance of the motor 100 is enhanced. On the basis, further, according to specific operating parameters and operating environment of the motor 100, the winding 122 may be separately disposed on the first stator yoke 116 of the first stator 102 or on the third stator yoke 142 of the second stator 106, so that on the basis of ensuring the operating frequency of the motor 100, the usage amount of the winding 122 may be saved, thereby reducing the assembly process of the motor 100, and also saving the manufacturing cost of the motor 100. Further, the first stator yoke 116 and the third stator yoke 142 may be disposed at the same time to ensure the operation effect of the motor 100.
Specifically, the second tooth 108 and the third stator yoke 142 may be detachably connected, that is, the second tooth 108 and the third stator yoke 142 may be detachably sleeved and assembled. By the arrangement of the separable sleeved assembly structure between the second tooth 108 and the third stator yoke 142, in the assembly process of the second stator 106, a coil may be wound on the second tooth 108, and then one end of the second tooth 108 may be connected to the third stator yoke 142. Therefore, the simplified winding process in the assembly process of the second stator 106 is realized, the winding difficulty is reduced, the slot filling rate of the winding 122 is improved, the output performance of the motor 100 is improved from the stator preparation angle, meanwhile, the waste materials can be reduced, and the waste of materials is reduced.
Specifically, the second tooth 108 and the third stator yoke 142 may be connected by a concave-convex structure, that is, a groove or a protrusion is provided at one end of the second tooth 108, and correspondingly, a protrusion or a groove matched with the groove or the protrusion is provided at a corresponding position of the third stator yoke 142, so that the connection between the second tooth 108 and the third stator yoke 142 may be achieved by the matching of the groove and the protrusion.
Further, as shown in fig. 6 and 7, based on the first stator 102 including the first stator yoke portion 116, the first tooth 104 includes first tooth bodies 118 and first tooth shoes 120, and each first tooth body 118 is provided with one winding 122; and/or one winding 122 may be provided on each second tooth 108.
Specifically, based on the first stator 102 including the first stator yoke 116, the first teeth 104 including the first tooth bodies 118 and the first tooth shoes 120, each winding 122 may be provided on one of the first tooth bodies 118, and accordingly, each winding 122 may be provided on one of the second teeth 108 when the winding 122 is provided on the second stator 106. That is to say, the winding 122 is arranged in a concentrated winding manner, so that in the operation process of the motor 100, the winding process of the winding 122 can be simplified on the basis of ensuring that the air-gap magnetic field has sufficient sine, and further, the manufacturing difficulty and the manufacturing cost of the motor 100 are reduced.
Further, each winding 122 may be simultaneously disposed on two adjacent first tooth bodies 118.
Specifically, the winding 122 may be wound on the first tooth body 118, and then the first tooth shoe 120 may be connected to the first stator yoke 116 at one end thereof. Therefore, the simplified winding process in the assembly process of the first stator 102 is realized, the winding difficulty is reduced, the slot fullness rate of the winding 122 is improved, the output performance of the motor 100 is improved from the stator preparation angle, meanwhile, the waste materials can be reduced, and the waste of materials is reduced.
Further, as shown in fig. 8, based on the first stator 102 including the second stator yoke 130 and the plurality of third teeth 132, the plurality of first teeth 104 are disposed on the third teeth 132, and the third teeth 132 include the second tooth bodies 136 and the second tooth shoes 138, each winding 122 may be simultaneously disposed on two adjacent second tooth bodies 136. That is, the arrangement of the windings 122 is performed in a distributed winding manner. By means of distributed winding, the sine of the air gap magnetic field between the first stator 102 or the second stator 106 and the rotor 110 can be effectively improved, so that the cogging torque and the torque fluctuation of the motor 100 are further reduced, and the stability of the motor 100 in the operation process is further improved.
Further, the winding 122 may also be arranged as a concentric winding, specifically, the coil of the winding 122 is arranged as a zigzag, that is, the coil is arranged as a plurality of layers of coils arranged concentrically, and each layer of coils is wound with a different number of first tooth bodies 118.
In any of the above embodiments, further, as shown in fig. 2, the magnetic poles of two adjacent permanent magnets 112 are opposite.
By setting the magnetic poles of the two adjacent permanent magnets 112 to be opposite, the two adjacent permanent magnets 112 can form an effective magnetic gathering effect so far, thereby further improving the air gap magnetic densities between the first stator 102 and the rotor 110 assembly and between the second stator 106 and the rotor 110 assembly, and further effectively improving the torque of the motor 100, reducing the torque fluctuation and improving the stability of the motor 100.
Specifically, as shown in fig. 9 and 10, the permanent magnets 112 may be disposed in a spoke type magnet arrangement or a V-shaped magnet arrangement.
Further, the magnetic shielding portion 114 includes a magnetic conductive member and/or a non-magnetic conductive member.
Specifically, the magnetic isolation portion 114 between the adjacent permanent magnets 112 may be configured as a magnetic conductive component, specifically, the rotor 110 may include an annular rotor core, mounting grooves for mounting the permanent magnets 112 are disposed on the annular rotor core at intervals, and a magnetic bridge is formed between the mounting grooves by using a body of the core, and the magnetic bridge is the magnetic isolation portion 114, so that the adjacent permanent magnets 112 are spaced. Through the above arrangement, at least a part of the rotor core can be utilized, the processing technology of the rotor 110 is simplified, the processing difficulty is reduced, and thus the manufacturing cost of the motor 100 is reduced.
Further, the magnetic isolation portion 114 may further include a non-magnetic conductive component, so as to effectively prevent the magnetic leakage of the rotor 110 assembly, thereby improving the magnetic density of the motor 100 during the operation process and ensuring the operation effect of the motor 100.
Further, the permanent magnet 112 is wrapped with ferrite or a rare earth permanent magnet.
Specifically, the ferrite or rare earth permanent magnet has good magnetic energy, and by using the ferrite or rare earth permanent magnet as the permanent magnet 112 of the rotor 110 component, it can be ensured that the permanent magnet 112 can effectively provide magnetic energy for a long time, thereby ensuring long-term stable operation of the motor 100.
According to the motor 100, the first stator 102 and the second stator 106 are arranged in the radial direction, so that the rotor 110 of the motor 100 can be arranged between the first stator 102 and the second stator 106, the power density of the motor 100 in the operation process is effectively improved, and the power distribution performance of the motor 100 is enhanced. Further, the arrangement mode of the permanent magnets 112, the material of the permanent magnets 112 and the arrangement mode of the magnetic isolation parts 114 are set, so that the air gap flux density and the reasonability of magnetic field distribution in the operation process of the motor 100 are further ensured, and the long-term stable operation of the motor 100 is ensured.
In any of the above embodiments, further, the pole pair number of the winding 122 satisfies the following relation: pa | -Ns ± Zr/2 |; where Pa is the number of pole pairs of the winding 122, Ns is the number of first slots, and Zr is the number of the magnetism isolating portions 114.
In this embodiment, the number of pole pairs of the winding 122 is limited, so that the normal operation of the motor 100 is ensured, and a new harmonic component appearing in the air gap flux density can be used as a working harmonic of the motor 100 to provide an output torque for the motor 100, thereby effectively improving the torque density of the motor 100. Specifically, the pole pair number of the winding 122 of the motor 100 satisfies the following relationship: pa | -Ns ± Zr/2 |; where Pa is the pole pair number of the winding 122 of the motor 100, Ns is the total number of the first slots 124, and Zr is the number of the flux barriers 114.
Specifically, based on the first tooth 104 including the first tooth body 118 and the first tooth shoe 120, the two adjacent first tooth shoes 120 have a notch of the first stator slot therebetween, and the total number of the first slots 124 is the number of the first stator slots between the two adjacent first tooth shoes 120.
When the plurality of first teeth 104 based on the first stator 102 are arranged in the form of split teeth on the third teeth 132, the first slots 124 include the second stator slots 134 between two adjacent third teeth 132 and the grooves 140 between two adjacent first teeth 104, and at this time, the total number of the first slots 124 is the sum of the numbers of the second stator slots 134 and the grooves 140.
According to a second aspect of the present invention, an electrical apparatus is proposed, comprising the electric machine 100 of any of the above embodiments.
The electrical equipment provided by the utility model comprises the motor 100 in any one of the above embodiments, so that the arrangement of the first stator 102 and the second stator 106 of the motor 100 can effectively improve the power density of the motor 100 in the operation process, enhance the power distribution performance of the motor 100, and also can obviously improve the torque density of the motor 100 in the operation process, thereby obviously improving the torque of the motor 100 and ensuring the operation requirements of the motor 100 for high rotating speed and high torque. Compared with the related art, the motor 100 can effectively reduce the radial volume of the motor 100 while ensuring the performance of the motor 100, and is beneficial to the miniaturization design of electrical equipment.
On the basis, further, through the limitation of the relationship between the relevant size in the first stator 102 and the relevant size of the rotor 110 in the motor 100 and the limitation between the relevant size in the second stator 106 and the relevant size of the rotor 110, the torque density of the motor 100 in the operation process can be effectively improved, so that the torque of the motor 100 is effectively improved, and the torque ripple and the cogging torque of the motor 100 can also be obviously reduced, so that the stability of the motor 100 is improved, the stability of the electrical equipment is further improved, and the market competitiveness of the electrical equipment is improved.
Specifically, the electric appliance may include an air conditioner, a washing machine, a dust collector, and the like.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. An electric machine, comprising:
a first stator including a plurality of first teeth having a tip width value of a1 and a plurality of first grooves having a notch width value of a 2;
a second stator disposed inside the first stator, the second stator including a plurality of second teeth, a second groove being formed between adjacent second teeth, a tooth top width of the second teeth being b1, and a slot opening width of the second groove being b 2;
the rotor is arranged between the first stator and the second stator and comprises a plurality of permanent magnets and magnetic isolation parts which are alternately arranged, the width value of one end, facing the first stator, of each permanent magnet is c1, the width value of one end, facing the first stator, of each magnetic isolation part is c2, the width value of one end, facing the second stator, of each permanent magnet is d1, and the width value of one end, facing the second stator, of each magnetic isolation part is d 2;
wherein the motor satisfies at least one of:
a value present in said plurality of said a1 and said a2 is a first value L1, a value present in said plurality of said c1 and said c2 is a second value L2, and satisfies | -L1-L2 | ÷ L1 ≦ 0.15, or | -L1-L2 | ÷ L2 ≦ 0.15;
a value present in said plurality of b1 and said plurality of b2 is a third value L3 and a value present in said plurality of d1 and said plurality of d2 is a fourth value L4, satisfying | -L3-L4 | ÷ L3 ≦ 0.15 or | -L3-L4 | ÷ L4 ≦ 0.15.
2. The electric machine of claim 1,
the first stator and the rotor further satisfy: | amax-(k1×c1+k2×c2)∣÷amaxLess than or equal to 0.15, or |. amax- (k1 xc 1+ k2 xc 2) ÷ (k1 xc 1+ k2 xc 2) ≦ 0.15, wherein said a ismaxAt the maximum of a plurality of a1 and a2, k1 and k2 are each integers greater than or equal to 1; and/or
The second stator and the rotor further satisfy: | bmax-(k3×d1+k4×d2)∣÷bmaxLess than or equal to 0.15, or |, bmax- (k3 × d1+ k4 × d2) | ÷ (k3 × d1+ k4 × d2) ≦ 0.15, wherein said b ismaxAt the maximum of the plurality of b1 and the plurality of b2, k3 and k4 are each an integer greater than or equal to 1.
3. The electric machine of claim 1, wherein the first stator further comprises:
the first teeth are arranged on the inner wall of the first stator yoke, and a first stator slot is formed between every two adjacent first teeth;
wherein the first slot comprises the first stator slot.
4. The electric machine of claim 3, wherein the first tooth further comprises:
a first tooth body connected to the first stator yoke;
the first tooth shoes are arranged on the first tooth bodies, and a notch of a first stator groove is formed between the two first tooth shoes.
5. The electric machine of claim 1, wherein the first stator further comprises:
a second stator yoke;
a plurality of third teeth disposed on an inner wall of the second stator yoke, a second stator slot being provided between two adjacent third teeth, the plurality of first teeth being disposed on the third teeth, a groove being provided between two adjacent first teeth on the same third tooth,
wherein the first slot comprises the second stator slot and the recess.
6. The electric machine of claim 5, wherein the third tooth further comprises:
a second tooth body connected to the second stator yoke;
and the second tooth shoes are arranged on the second tooth bodies, and a notch of a second stator slot is formed between the two second tooth shoes.
7. The electric machine according to any of claims 1 to 6,
an angle of an angle between a center line of the first slot and a center line of the second tooth in a radial direction of the motor is less than or equal to 45/Ns degrees,
wherein Ns is the number of the first slots.
8. The electric machine according to any of claims 1 to 6,
a first air gap is arranged between the first stator and the rotor;
a second air gap is provided between the second stator and the rotor.
9. The electric machine of any of claims 1 to 6, further comprising:
a winding disposed on at least one of the first stator and the second stator.
10. The electrical machine according to any one of claims 1 to 3,
the magnetic poles of two adjacent permanent magnets are opposite.
11. The electrical machine according to any one of claims 1 to 3,
the magnetism isolating part comprises a magnetic conducting component and/or a non-magnetic conducting component.
12. The electrical machine according to any one of claims 1 to 3,
the permanent magnet is coated with ferrite or a rare earth permanent magnet.
13. The electric machine of claim 9,
the pole pair number of the winding satisfies the following relational expression: pa | -Ns ± Zr/2 |;
wherein Pa is the number of pole pairs of the winding, Ns is the number of the first slots, and Zr is the number of the magnetism isolating parts.
14. An electrical device, comprising:
an electric machine as claimed in any one of claims 1 to 13.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123189657.1U CN216356131U (en) | 2021-12-17 | 2021-12-17 | Motor and electrical equipment |
| PCT/CN2022/079415 WO2023108922A1 (en) | 2021-12-17 | 2022-03-04 | Stator structure, electric motor and electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123189657.1U CN216356131U (en) | 2021-12-17 | 2021-12-17 | Motor and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216356131U true CN216356131U (en) | 2022-04-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123189657.1U Active CN216356131U (en) | 2021-12-17 | 2021-12-17 | Motor and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216356131U (en) |
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2021
- 2021-12-17 CN CN202123189657.1U patent/CN216356131U/en active Active
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