CN110829631B - Motor stator and motor - Google Patents
Motor stator and motor Download PDFInfo
- Publication number
- CN110829631B CN110829631B CN201810912055.8A CN201810912055A CN110829631B CN 110829631 B CN110829631 B CN 110829631B CN 201810912055 A CN201810912055 A CN 201810912055A CN 110829631 B CN110829631 B CN 110829631B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/12—Machines characterised by the modularity of some components
Abstract
The invention provides a motor stator and a motor, wherein the motor stator comprises: a plurality of circumferentially arranged stator modules, the stator modules comprising: an arcuate stator yoke; the stator teeth can be arranged on the arc-shaped stator yoke along the circumferential direction, and sequentially comprise tooth root parts, tooth waist parts and pole shoe parts which are connected with one another from inside to outside along the radial direction of the arc-shaped stator yoke; and the stator winding is arranged on the arc-shaped stator yoke part in a winding mode along the circumferential direction and can penetrate through the plurality of stator teeth, wherein the plurality of stator modules are arranged along the circumferential direction, so that the pole shoe parts on the stator modules are arranged along the circumferential direction in a surrounding mode to form an outer ring matching surface matched with the motor rotor. By the technical scheme, the axial size of the motor can be reduced, so that the motor is thinned, and the internal capacity of electric equipment such as a washing machine and the like can be improved by saving space.
Description
Technical Field
The invention relates to the field of motors, in particular to a motor stator and a motor.
Background
For a motor applied to a washing machine adopting a direct drive technology, it is required that the axial size of the motor is as small as possible so as not to increase the size of the washing machine too much while increasing the washing capacity.
In the related art, when a transverse flux motor is used in a washing machine, although the transverse flux motor has a high torque density, the following disadvantages are still encountered:
(1) the process is complicated and the manufacturing cost is high.
(2) Each phase of the transverse flux motor is a module, a plurality of modules are arranged along the axial direction to realize modular configuration, and because each phase winding is annular, the total axial length of the motor is equal to the sum of the axial lengths of all the modules, and when the motor is a multi-phase motor, the axial size of the motor is still larger.
Disclosure of Invention
In order to solve at least one of the above technical problems, an object of the present invention is to provide a stator of an electric motor.
It is another object of the present invention to provide an electric machine.
In order to achieve the above object, a technical solution of a first aspect of the present invention provides a motor stator, including: a plurality of stator modules arranged along a circumferential direction, the stator modules comprising: the stator comprises an arc-shaped stator yoke and a plurality of stator teeth, wherein the plurality of stator teeth can be arranged on the arc-shaped stator yoke along the circumferential direction, and the stator teeth sequentially comprise tooth root parts, tooth waist parts and pole shoe parts which are connected with one another from inside to outside along the radial direction of the arc-shaped stator yoke; the stator winding is arranged on the arc-shaped stator yoke portion in a winding mode along the circumferential direction and can penetrate through the plurality of stator teeth, wherein the same-phase winding is arranged on each stator module in a winding mode, the stator modules are arranged in the circumferential direction, and the pole shoe portions on the stator modules are arranged in the circumferential direction in a surrounding mode to form an outer ring matching surface matched with the motor rotor.
In the technical scheme, a section of arc-shaped stator yoke is adopted as a base body of a stator module, a plurality of stator teeth are arranged on the stator yoke, and simultaneously, a stator winding is wound along the stator yoke to generate transverse magnetic flux after electrification, because each stator yoke is only wound with a phase winding, namely, each phase comprises at least one stator module, the motor stator of the multi-phase driving motor which is formed into an annular structure by arranging a plurality of stator modules along the circumferential direction can realize the adjustment of the phase difference of the induced voltage of the stator winding on each stator module by adjusting the physical distance between the stator modules, thereby obtaining the transverse magnetic flux motor with required phase number, such as a two-phase, three-phase or multi-phase motor, compared with the prior art that the stator modules are arranged along the axial direction and the phase number is increased by increasing the number of the stator modules (namely increasing the axial size of the motor stator), the axial dimension of motor stator in this application only is equivalent to the axial dimension of a looks motor stator among the prior art, and then realizes reducing the axial dimension of motor to realize the motor attenuate, to electrical equipment such as washing machine, can improve inner capacity through saving space.
In addition, each stator tooth on the stator yoke part is formed by a tooth root part, a tooth waist part and a pole shoe part in a structure, the tooth root part, the tooth waist part and the pole shoe part are sequentially arranged from inside to outside along the radial direction, the stator teeth are arranged along the circumferential direction, the pole shoe parts on the stator teeth are also arranged along the circumferential direction, the outer end surfaces of the pole shoe parts are spliced along the circumferential direction to form an outer ring matching surface of the motor stator, and the outer ring matching surface is matched with the motor rotor in a sleeved mode, so that the structure of the inner stator of the outer rotor transverse flux motor is realized, the characteristic of large torque density of the transverse flux motor is maintained, and the purpose of expanding the use range of the outer rotor transverse flux motor is achieved by combining the characteristic of thinning the motor.
The stator teeth are arranged on the arc-shaped stator yoke portion, and can be manufactured in various modes, for example, the stator teeth and the stator yoke portion are manufactured through integrated processing and forming, and the stator teeth and the arc-shaped stator yoke portion can also be assembled in a butt joint mode along the radial direction as mutually independent components or assembled in a sleeved mode.
In addition, slot paper can be adopted among the stator winding, the stator yoke and the stator teeth to realize insulation, and an insulation frame can also be adopted to realize insulation.
In addition, the motor stator in the above technical solution provided by the present invention may further have the following additional technical features:
in the above technical solution, preferably, the tooth root portion is provided at one end of the tooth waist portion, and includes a fixing groove formed by two side wall structures extending in an axial direction of the arc-shaped stator yoke portion; the pole shoe portion is arranged at the other end of the tooth waist portion and arranged in the same direction as the fixed groove, and the arc-shaped stator yoke portion is sleeved in the fixed groove, so that the stator teeth and the arc-shaped stator yoke portion are assembled in a matched mode.
In the technical scheme, the stator teeth sequentially comprise tooth root parts, tooth waist parts and pole shoe parts from inside to outside along the radial direction according to different structures, positions and effects, so that the pole shoe parts on each stator tooth are circumferentially arranged to form an outer circular surface matched with the outer rotor, and the axial size optimization of the outer rotor motor can be realized on the premise of not considering the radial size.
The fixing groove is formed in the root of each stator tooth, the fixing groove is matched with the corresponding stator yoke, so that the stator teeth are assembled on the arc-shaped stator yoke, the assembling strength between the stator teeth and the arc-shaped stator yoke is met, the thickness or height of the stator yoke can be set to be as small as possible, and the preparation requirements of the driving motor in the electric equipment such as the washing machine are met.
Through setting up utmost point boots and fixed slot along the syntropy, utmost point boots, tooth waist portion and fixed slot can enclose and establish the space that passes through that forms the C shape, on the one hand, make stator winding pass the space that passes through of C shape when around establishing along the outer anchor ring of annular stator yoke portion, thereby realize spacing radially to stator winding, on the other hand, through adopting the winding that passes through in C type space, outside circular arc section outwards arches out, easy coiling, consequently, the processing degree of difficulty is low, simultaneously, the winding of medial surface is the flare-out attitude, consequently, can save winding line, reduce the wire cost, on the other hand again, because the groove space only has a phase winding, consequently, do not have the safety gap between with other windings, and then make the groove filling rate higher.
In any of the above technical solutions, preferably, the fixing grooves on two adjacent stator teeth are reversely sleeved on the arc-shaped stator yoke portion, so that the two adjacent stator teeth are reversely arranged along the axial direction, wherein a crossing region for forming a stator winding can be defined between the two adjacent stator teeth, so that the stator winding can extend along the arc surface of the arc-shaped stator yoke portion close to the axis, then wind around the arc surface region far away from the axis, and pass through the crossing region.
In the technical scheme, two adjacent stator teeth are arranged in the axial direction in a reverse direction, on one hand, after magnetic flux emitted by a matched rotor magnetic pole enters one stator tooth, the magnetic flux can cross a stator winding plane through the reverse arrangement of the stator teeth, and further the stator winding can induce electric potential, so that the motor rotation is realized, the condition that when the two adjacent stator teeth are arranged in the same direction, a flow path of the magnetic flux does not cross a closed surface formed by a motor winding, so that the electric potential cannot be induced on the stator winding is prevented, on the other hand, the two adjacent stator teeth realize axial limit on the stator winding through two opposite C-shaped crossing spaces, so that the stator winding is wound in the reverse direction along an inner circular arc surface after passing through a side wall at the end part of the stator yoke part and along an area between a pole shoe part and the stator yoke part from the view of the whole stator module, the tooth waist parts of two adjacent stator teeth are located on two sides of the stator winding, so that the stator winding can meet the motor requirement along the circumferential direction around the set precision while the induction of the potential of the stator winding is ensured, and the performance of the motor is further improved.
In any of the above technical solutions, preferably, the stator teeth are formed by a plurality of stator tooth punching sheets in a circumferentially superposed configuration along the arc-shaped stator yoke portion.
In this technical scheme, form the stator tooth through the form with stator tooth towards the piece, and then combine stator yoke portion structure to form stator core structure, compare with the horizontal flux motor or claw machine motor that adopt solid tooth, when can reduce the iron core loss by a wide margin, need not increase great technology and improve the cost.
In any one of the above technical solutions, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke portion are respectively formed by a multi-segment straight surface along a circumferential splicing structure.
In this technical scheme, through with arc stator yoke portion on with fixed slot complex part be straight face structure to realize the laminating adaptation between fixed slot and the stator yoke portion, and then be favorable to promoting the motor stator's after the equipment intensity.
In any one of the above technical solutions, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke are arc surfaces, and a slot structure matched with the side wall of the fixing slot is formed in a region matched with the stator teeth on the arc surface through a concave arrangement, wherein the depth of the slot structure is the same as the thickness of the corresponding side wall.
In this technical scheme, through set up the draw-in groove structure on arc stator yoke portion to respectively with two lateral walls of fixed slot to the cooperation, in order to realize the circumference location of stator tooth, when guaranteeing equipment intensity, promoted motor stator equipment's stability.
In any of the above technical solutions, preferably, the arc-shaped stator yoke is formed by stacking a plurality of stator yoke laminations in an axial direction.
In any of the above-described aspects, preferably, the sectional shape of the fixing groove is configured to be any one of a rectangle, a U-shape, and a trapezoid.
In this technical scheme, the cross-section of fixed slot can have multiple structural style to change along with the change of the cross-sectional shape of stator yoke portion, in order to satisfy the setting demand of different motor stator structures.
Preferably, the fixing groove has a rectangular or trapezoidal sectional shape.
In any of the above technical solutions, preferably, the length of the side wall of the fixing groove far away from the tooth waist portion is less than or equal to the length of the side wall near the tooth waist portion.
In the technical scheme, the side wall far away from the tooth waist part is mainly used for being matched with the stator yoke part and achieving mechanical fixing, at the moment, the length of the side wall far away from the tooth waist part can be smaller than or equal to that of the side wall close to the tooth waist part, and the length of the side wall far away from the tooth waist part is further reduced so as to set the length of the side wall to be smaller than that of the side wall close to the tooth waist part, so that the quality of the whole motor stator can be effectively reduced.
And for the side wall close to the tooth waist part, the fixing groove is formed by matching with the side wall far away from the tooth waist part so as to realize mechanical fixing between the side wall and the stator yoke part, and meanwhile, the magnetic force lines transmitted by the tooth waist part can be transmitted into the stator yoke part, so that the magnetic flux can be effectively increased by setting the side wall close to the tooth waist part to be a longer side.
In any of the above technical solutions, preferably, a thickness of a side wall of the fixing groove far from the tooth waist portion is less than or equal to a thickness of a side wall near the tooth waist portion.
In this technical scheme, through the thickness that keeps away from the fixed slot the lateral wall of tooth waist portion set up to be less than the thickness of being close to the lateral wall of tooth waist portion, on the one hand, through the thickness of guaranteeing the lateral wall that is close to the tooth waist portion to the realization will be conveyed the magnetic line of force that comes by tooth waist portion and lead the magnetic quantity in the stator yoke portion, be favorable to increasing simultaneously, on the other hand, through the thickness of the lateral wall of injecing away from the tooth waist portion, when satisfying mechanical fastening's intensity, also be favorable to reducing motor stator's weight.
The technical solution of the second aspect of the present invention provides a motor, including: the motor stator according to any one of the aspects of the first aspect of the present invention; and the motor rotor is sleeved and assembled with the motor stator, wherein the motor stator is an inner stator, namely the motor is an outer rotor motor.
The motor is specifically an outer rotor reluctance transverse flux motor.
In any of the above technical solutions, preferably, the stator of the motor has n stator modules, wherein when the number of phases of the motor is m, the number of stator modules in each phase is n/m.
In the technical scheme, for a motor with n stator modules, the number of phases depends on the number of modules contained in each phase, if the number of modules in each phase is a, and a is an integer not less than 1, the total number m of the motor phases is n/a, when a is 1, each stator module represents one phase and is sequentially arranged along the circumferential direction, the space angle occupied by each phase is equal to the space angle occupied by each module, namely 360 °/n, if a is greater than 1, the phases are sequentially arranged in the sequence of one module in each phase when being arranged along the circumferential direction, the previous arrangement is repeated after m windings are arranged until a times of repetition, and in order to reduce back electromotive force harmonics and torque ripple, a and m are generally set to be integers greater than 1.
One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages:
(1) the motor stator of the multiphase driving motor constructed in an annular structure is formed by arranging a plurality of stator modules in the circumferential direction, and the adjustment of the phase difference of the induced voltage of the stator winding on each stator module can be realized by adjusting the physical distance between the stator modules, so that the transverse flux motor with the required number of phases, such as a two-phase motor, a three-phase motor or a multiphase motor, is obtained.
(2) The two adjacent stator teeth are arranged in the opposite direction along the axial direction, so that the two adjacent stator teeth pass through two opposite C-shaped crossing spaces, magnetic flux emitted by a rotor magnetic pole enters one stator tooth and then passes through a stator winding plane through the opposite arrangement of the stator teeth, and then the stator winding can induce potential.
Additional aspects and advantages of the invention 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 invention.
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 shows a schematic structural view of a stator of an electrical machine according to an embodiment of the invention;
FIG. 2 shows a schematic structural diagram of a stator module according to one embodiment of the invention;
FIG. 3 illustrates a structural schematic view of a stator tooth according to one embodiment of the present invention;
FIG. 4 illustrates a schematic structural view of an arcuate stator yoke according to an embodiment of the present invention;
fig. 5 illustrates a schematic structural view of an arcuate stator yoke according to another embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:
10 stator modules, 102 arc stator yoke, 104 stator teeth, 106 stator windings, 1042 pole shoe, 1044 tooth waist, 1046 tooth root, 1046A fixation slot, 1046B first side wall, 1046C second side wall, 1022 slot.
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 invention 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 in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A motor stator according to some embodiments of the present invention is described below with reference to fig. 1 to 5.
As shown in fig. 1 to 5, a stator of an electric machine according to an embodiment of the present invention includes: a plurality of circumferentially arranged stator modules 10, the stator modules 10 comprising: the stator comprises an arc-shaped stator yoke 102 and a plurality of stator teeth 104, wherein the plurality of stator teeth 104 can be circumferentially arranged on the arc-shaped stator yoke 102, and the stator teeth 104 sequentially comprise a tooth root part 1046, a tooth waist part 1044 and a pole shoe part 1042 which are connected with each other from inside to outside along the radial direction of the arc-shaped stator yoke 102; and the stator winding 106 is circumferentially wound on the arc-shaped stator yoke 102 and can penetrate through the plurality of stator teeth 104, wherein the plurality of stator modules 10 are circumferentially arranged, and each stator module 10 is wound with the in-phase winding 106, so that the pole shoe portions 1042 on the stator modules 10 are circumferentially surrounded to form an outer ring matching surface matched with the motor rotor.
In this embodiment, an arc-shaped stator yoke is used as a base of one stator module 10, so that a plurality of stator teeth 104 are arranged on the stator yoke, and a stator winding 106 is wound along the stator yoke to generate a transverse magnetic flux after being energized, because only one phase winding is wound on each stator yoke 102, that is, each phase includes at least one stator module 10, by arranging a plurality of stator modules 10 in a circumferential direction to construct a motor stator of a multi-phase driving motor in an annular structure, it is possible to adjust a phase difference of an induced voltage of the stator winding 106 on each stator module 10 by adjusting a physical distance between the stator modules 10, so as to obtain a transverse magnetic flux motor with a required number of phases, such as a two-phase, three-phase, or multi-phase motor, compared with the prior art in which the stator modules 10 are arranged in an axial direction, and increase of the number of the stator modules 10 (that is, increasing an axial dimension of the motor stator), the axial dimension of motor stator in this application only is equivalent to the axial dimension of a looks motor stator among the prior art, and then realizes reducing the axial dimension of motor to realize the motor attenuate, to electrical equipment such as washing machine, can improve inner capacity through saving space.
In addition, each stator tooth 104 on the stator yoke is formed by a tooth root 1046, a tooth waist 1044 and a pole shoe 1042, the tooth root 1046, the tooth waist 1044 and the pole shoe 1042 are sequentially arranged from inside to outside along the radial direction, the pole shoes 1042 on the stator tooth 104 are also arranged along the circumferential direction as the stator teeth 104 are arranged along the circumferential direction, the outer end surfaces of the pole shoes 1042 are spliced along the circumferential direction to form an outer ring matching surface of the motor stator, and the outer ring matching surface is matched with the motor rotor in a sleeved mode, so that the structure of the inner stator of the outer rotor transverse flux motor is realized, the characteristic of large torque density of the transverse flux motor is maintained, and the purpose of expanding the use range of the outer rotor transverse flux motor is achieved by combining the characteristic of thinning the motor.
The stator teeth 104 are disposed on the arc-shaped stator yoke 102, and may be implemented in various forms, for example, the stator teeth 104 and the stator yoke are manufactured by integral processing, and the stator teeth 104 and the arc-shaped stator yoke 102 may also be assembled as mutually independent components in a radial butt joint manner or assembled in a sleeving manner.
In addition, slot paper or an insulating frame can be used for insulation between the stator winding 106 and the stator yoke and between the stator teeth 104.
In the above embodiment, preferably, the tooth root portions 1046 are provided at one end of the tooth waist portion 1044, and include the fixing grooves 1046A formed by two side wall configurations extending in the axial direction of the arc-shaped stator yoke portion 102; the pole shoe 1042 is disposed at the other end of the tooth waist 1044 and is disposed in the same direction as the fixing groove 1046A, wherein the stator teeth 104 and the arc stator yoke 102 are assembled in a matching manner by sleeving the arc stator yoke 102 in the fixing groove 1046A.
In this embodiment, the stator teeth 104 sequentially include a tooth root portion 1046, a tooth waist portion 1044, and a pole shoe portion 1042 from inside to outside in a radial direction according to a difference in structure, position, and action, so that the pole shoe portion 1042 on each stator tooth 104 circumferentially surrounds to form an outer circular surface matched with the outer rotor, and under a premise that a radial dimension is not considered, an axial dimension of the outer rotor motor can be optimized.
The fixing grooves 1046A are formed in the root portions of the stator teeth 104, the fixing grooves 1046A are matched with the stator yoke portion, the stator teeth 104 are assembled on the arc-shaped stator yoke portion 102, the assembling strength between the stator teeth 104 and the arc-shaped stator yoke portion 102 is met, meanwhile, the thickness or height of the stator yoke portion can be set to be as small as possible, and the manufacturing requirements of driving motors in electrical equipment such as washing machines are met.
The pole shoe portions 1042 and the fixing grooves 1046A are arranged in the same direction, and the pole shoe portions 1042, the tooth waist portions 1044 and the fixing grooves 1046A can be arranged in a surrounding mode to form a C-shaped penetrating space, so that the stator winding 106 can penetrate through the C-shaped penetrating space while being arranged in a surrounding mode along the outer ring surface of the annular stator yoke portion 102, radial limiting of the stator winding 106 is achieved, the outer side arc section is outwards arched and easy to wind through the winding penetrating in the C-shaped space, machining difficulty is low, meanwhile, the winding on the inner side face is in a straightening state, winding wires can be saved, wire cost is reduced, and on the other hand, safety gaps between the winding wires and other windings do not exist due to the fact that the groove space is only provided with one-phase winding, and accordingly the groove fullness rate is higher.
In any of the above embodiments, preferably, the fixing slots 1046A on two adjacent stator teeth 104 are reversely sleeved on the arc-shaped stator yoke 102, so that the two adjacent stator teeth 104 are reversely arranged along the axial direction, wherein a crossing region for forming the stator winding 106 can be enclosed between the two adjacent stator teeth 104, so that the stator winding 106 can extend along the arc surface of the arc-shaped stator yoke 102 close to the shaft center, then wind around the arc surface region far away from the shaft center, and pass through the crossing region.
In this embodiment, by disposing two adjacent stator teeth 104 in opposite directions along the axial direction, on one hand, after magnetic flux emitted from the matched rotor magnetic pole enters one stator tooth 104, the magnetic flux can cross the plane of the stator winding 106 through the opposite disposition of the stator teeth 104, and then the stator winding 106 can induce a potential, so as to realize motor rotation, and prevent that when two adjacent stator teeth 104 are disposed in the same direction, the flow path of the magnetic flux does not cross the closed surface formed by the motor winding, so that the potential cannot be induced on the stator winding 106, on the other hand, two adjacent stator teeth 104 can realize axial limit to the stator winding 106 through two opposite C-shaped crossing spaces, so that when viewed from the whole stator module 10, the stator winding 106 is wound along the inner arc surface, and after passing through the side wall of the end of the stator yoke, wound in opposite directions along the region between the pole shoe portion 1042 and the stator yoke, the tooth waist portions 1044 of two adjacent stator teeth 104 are respectively located at two sides of the stator winding 106, so that the stator winding 106 can meet the motor requirement along the circumferential winding setting precision while the electric potential induced by the stator winding 106 is ensured, and the motor performance can be further improved.
In any of the above embodiments, preferably, the stator teeth 104 are formed by a plurality of laminations of the stator teeth 104 in a circumferentially superimposed configuration along the arcuate stator yoke portion 102.
In this embodiment, the stator teeth 104 are formed in the form of the punching sheets of the stator teeth 104, and then the stator yoke structure is combined to form the stator core structure, so that compared with a transverse flux motor or a claw machine motor adopting solid teeth, the stator core structure can greatly reduce the core loss without increasing large process improvement cost.
In any of the above embodiments, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke portion 102 are respectively formed by a multi-segment straight surface along a circumferential splicing configuration.
In this embodiment, the portion of the arc-shaped stator yoke 102, which is matched with the fixing groove 1046A, is in a straight-face structure, so that the fixing groove 1046A and the stator yoke are fitted together, and the strength of the assembled motor stator is improved.
In any of the above embodiments, preferably, the outer side wall and the inner side wall of the arc-shaped stator yoke 102 are arc surfaces, and the region on the arc surface, which is engaged with the stator teeth 104, is recessed to form a structure of the slot 1022, which is engaged with the side wall of the fixing slot 1046A, where the depth of the structure of the slot 1022 is the same as the thickness of the corresponding side wall.
In this embodiment, the structure of the clamping groove 1022 is formed in the arc-shaped stator yoke 102 to be respectively matched with two side walls of the fixing groove 1046A, so as to realize circumferential positioning of the stator teeth 104, and the assembling stability of the motor stator is improved while the assembling strength is ensured.
In any of the above embodiments, preferably the arcuate stator yoke 102 is formed from a plurality of stator yoke laminations stacked axially.
In any of the above embodiments, it is preferable that the sectional shape of the fixing groove 1046A is configured as any one of a rectangle, a U shape, and a trapezoid.
In this embodiment, the cross section of the fixing groove 1046A may have various structural forms, and is changed along with the change of the cross-sectional shape of the stator yoke portion, so as to meet the setting requirements of different motor stator structures.
Preferably, the fixing groove 1046A has a rectangular or trapezoidal sectional shape.
In any of the above embodiments, preferably, the length of the fixing slots 1046A away from the side wall of the lumbar gear portion 1044 is less than or equal to the length of the side wall close to the lumbar gear portion 1044.
In this embodiment, the side wall (the second side wall 1046C) far from the tooth waist 1044 is mainly used for cooperating with the stator yoke and achieving mechanical fixation, at this time, the length of the second side wall 1046C may be less than or equal to the length of the side wall (the first side wall 1046B) near the tooth waist 1044, and the length of the second side wall 1046C is further reduced to set the length of the second side wall 1046C to be less than the length of the first side wall 1046B, so that the mass of the whole motor stator can be effectively reduced.
As for the first side wall 1046B, while the fixing groove 1046A is formed in cooperation with the second side wall 1046C to realize mechanical fixing with the stator yoke, magnetic lines of force transmitted from the waisted tooth portion 1044 can be transmitted into the stator yoke, and thus, by setting the first side wall 1046B to be a longer side, the increased magnetic flux can be effectively reduced.
In any of the above embodiments, preferably, the thickness of the fixing groove 1046A away from the side wall of the lumbar gear portion 1044 is less than or equal to the thickness of the side wall close to the lumbar gear portion 1044.
In this embodiment, by setting the thickness of the second side wall 1046C to be smaller than the thickness of the first side wall 1046B, on the one hand, by ensuring the thickness of the first side wall 1046B, the magnetic lines of force transmitted from the tooth waist 1044 are transmitted to the stator yoke, and at the same time, the magnetic flux amount is increased, and on the other hand, by defining the thickness of the second side wall 1046C, the mechanical fixing strength is satisfied, and at the same time, the weight of the motor stator is reduced.
An electric machine according to an embodiment of the invention comprises: a motor stator as in any of the above embodiments; and the motor rotor is sleeved and assembled with the motor stator, wherein the motor stator is an inner stator, namely the motor is an outer rotor motor.
The motor is specifically an outer rotor reluctance transverse flux motor.
In this embodiment, by providing the motor rotor as the inner rotor to form the inner rotor reluctance transverse flux motor, it is not necessary to provide a safety gap, compared with the outer rotor motor, and it is possible to further achieve a reduction in the overall size of the motor.
In any of the above embodiments, it is preferable that there are n stator modules 10 in the stator of the electrical machine, wherein when the number of phases of the electrical machine is m, the number of stator modules 10 in each phase is n/m.
In this embodiment, for a motor having n stator modules 10, the number of phases depends on the number of modules included in each phase, if the number of modules in each phase is a, and a is an integer not less than 1, the total number of motor phases m is n/a, if a is 1, each stator module 10 represents one phase, and the phases are sequentially arranged along the circumferential direction, and the spatial angle occupied by each phase is equal to the spatial angle occupied by each module, i.e., 360 °/n, if a is greater than 1, the phases are sequentially arranged in the order of one module in each phase when arranged along the circumferential direction, and after m windings are arranged, the previous arrangement is repeated until a times are repeated, and in order to reduce back electromotive force harmonics and torque ripple, a and m are usually set to an integer greater than 1.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. 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 of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
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 invention. 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 (11)
1. An electric machine stator, comprising:
a plurality of circumferentially arranged stator modules, the stator modules comprising:
the stator comprises an arc-shaped stator yoke and a plurality of stator teeth, wherein the plurality of stator teeth can be arranged on the arc-shaped stator yoke along the circumferential direction, and the stator teeth sequentially comprise a tooth root part, a tooth waist part and a pole shoe part which are connected with each other from inside to outside along the radial direction of the arc-shaped stator yoke;
a stator winding circumferentially wound on the arc-shaped stator yoke and capable of passing through the plurality of stator teeth,
the stator comprises a plurality of stator modules, wherein each stator module is wound with an in-phase winding, and the plurality of stator modules are arranged along the circumferential direction, so that the pole boots on the stator modules are circumferentially arranged to form an outer ring matching surface matched with a motor rotor;
the tooth root part is arranged at one end of the tooth waist part and comprises a fixing groove formed by two side wall structures extending along the axial direction of the arc-shaped stator yoke part;
the pole boot part is arranged at the other end of the tooth waist part and is arranged along the same direction with the fixing groove;
and the arc-shaped stator yoke is sleeved in the fixing groove, so that the stator teeth and the arc-shaped stator yoke are assembled in a matched mode.
2. The motor stator of claim 1,
the fixing grooves on two adjacent stator teeth are reversely sleeved on the arc-shaped stator yoke part so as to enable the two adjacent stator teeth to be reversely arranged along the axial direction,
and a crossing region for forming the stator winding can be enclosed between two adjacent stator teeth, so that the stator winding can extend along the arc surface of the arc stator yoke part close to the axis and then is wound to the arc surface region far away from the axis and passes through the crossing region.
3. The motor stator of claim 1,
the stator teeth are formed by a plurality of stator tooth punching sheets along the circumferential superposition structure of the arc-shaped stator yoke portion.
4. The motor stator of claim 1,
the outer side wall and the inner side wall of the arc-shaped stator yoke portion are formed by splicing a plurality of sections of straight surfaces along the circumferential direction.
5. The motor stator of claim 1,
the outer side wall and the inner side wall of the arc-shaped stator yoke part are arc surfaces, the region matched with the stator teeth on the arc surfaces is provided with a clamping groove structure matched with the side wall of the fixed groove through a concave arrangement,
the depth of the clamping groove structure is the same as the thickness of the corresponding side wall.
6. The motor stator of claim 1,
the arc stator yoke is formed by stacking a plurality of stator yoke punching sheets along the axial direction.
7. The motor stator according to any one of claims 1 to 6,
the sectional shape of the fixing groove is configured to be any one of a rectangle, a U-shape, and a trapezoid.
8. The motor stator according to any one of claims 1 to 6,
the length of the side wall of the fixing groove far away from the tooth waist part along the axial direction is smaller than or equal to the length of the side wall close to the tooth waist part along the axial direction.
9. The motor stator according to any one of claims 1 to 6,
the thickness of the side wall of the fixing groove far away from the tooth waist part along the circumferential direction is smaller than or equal to the thickness of the side wall of the tooth waist part along the circumferential direction.
10. An electric machine, comprising:
an electric machine stator as claimed in any one of claims 1 to 9;
and the motor rotor is sleeved and assembled with the motor stator.
11. The electric machine of claim 10,
the stator of the motor is provided with n stator modules,
when the number of phases of the motor is m, the number of the stator modules in each phase is n/m.
Priority Applications (1)
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| CN201810912055.8A CN110829631B (en) | 2018-08-10 | 2018-08-10 | Motor stator and motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810912055.8A CN110829631B (en) | 2018-08-10 | 2018-08-10 | Motor stator and motor |
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| CN110829631B true CN110829631B (en) | 2022-04-22 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330723A1 (en) * | 2009-12-04 | 2011-06-08 | Hamilton Sundstrand Corporation | Transverse regulated flux machine |
| CN103683566A (en) * | 2012-09-18 | 2014-03-26 | 株式会社东芝 | Transverse flux motor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610223A (en) * | 1999-10-26 | 2005-04-27 | 菲舍尔和佩克尔应用有限公司 | Polyphase transverse flux motor |
| US20080179982A1 (en) * | 2007-01-30 | 2008-07-31 | Arvinmeritor Technology, Llc | Transverse flux, switched reluctance, traction motor with bobbin wound coil, with integral liquid cooling loop |
| EP2466723A1 (en) * | 2010-12-20 | 2012-06-20 | Cyoris Ag | Transversal flow machine |
| JP5596646B2 (en) * | 2011-09-20 | 2014-09-24 | 和明 小林 | Rotating electric machine |
| CN104272559A (en) * | 2012-03-12 | 2015-01-07 | 霍加纳斯股份有限公司 | Stator and rotor for an electric machine |
| CN106612018B (en) * | 2016-12-15 | 2019-01-25 | 广东威灵电机制造有限公司 | Stator core, Stator and electrical machine |
| CN106685110B (en) * | 2016-12-19 | 2019-08-27 | 广东威灵电机制造有限公司 | A kind of motor stator and motor |
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2018
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330723A1 (en) * | 2009-12-04 | 2011-06-08 | Hamilton Sundstrand Corporation | Transverse regulated flux machine |
| CN103683566A (en) * | 2012-09-18 | 2014-03-26 | 株式会社东芝 | Transverse flux motor |
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| CN110829631A (en) | 2020-02-21 |
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