CN214674577U - Claw-pole motor stator core and motor assembly applying same - Google Patents
Claw-pole motor stator core and motor assembly applying same Download PDFInfo
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- CN214674577U CN214674577U CN202121219157.5U CN202121219157U CN214674577U CN 214674577 U CN214674577 U CN 214674577U CN 202121219157 U CN202121219157 U CN 202121219157U CN 214674577 U CN214674577 U CN 214674577U
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Abstract
The utility model relates to a claw utmost point motor stator core and applied this stator core's motor element, this stator core include the stator yoke that system silicon steel made and a plurality of stator claw utmost point that soft-magnetic composite made, and a plurality of stator claw utmost point are fixed in the both sides of stator yoke in turn. The tail ends of a pair of stator claw poles which are distributed alternately correspond to a pair of permanent magnets with opposite polarities respectively, magnetic induction lines of the permanent magnets enter the stator claw poles from the lower parts of the stator claw poles which are opposite to the permanent magnets, are shunted to the multi-layer silicon steel sheets of the stator yoke part through the stator claw poles, flow in parallel in each lamination which enters the stator yoke part, penetrate out of the lamination to enter the stator claw poles on the other side, and return to the adjacent permanent magnets after passing through the whole stator claw pole; the magnetic induction lines flow in each lamination of the stator yoke with little penetration of the intermediate insulating layer, i.e. no eddy currents. The stator core structure can ensure that a magnetic circuit passes through smoothly, can ensure that eddy current loss is low, and meets the requirement of three-dimensional magnetic flux characteristics.
Description
Technical Field
The utility model relates to the technical field of electric machines, concretely relates to adopt soft-magnetic combined material and roll up claw utmost point motor stator core that system silicon steel sheet mixes. The stator core comprises a stator yoke made of rolled silicon steel and stator claw poles made of soft magnetic composite material.
Background
The claw-pole motor is one of transverse flux motors, and has the advantages of high power density and torque density compared with a radial flux motor; and the armature winding is simple, and the winding shape is distributed in the motor in a circular ring shape without end winding. Compared with an electrically excited claw pole motor, the claw pole permanent magnet motor does not need an excitation winding, reduces electric brushes and commutator devices, and is easy to maintain; because exciting current is not needed, the efficiency of the motor is improved. The permanent magnet of the claw pole permanent magnet motor is arranged on the side of the rotor, and the armature winding and the claw pole are positioned on the side of the stator.
Different from the traditional radial flux motor, the stator core of the claw pole permanent magnet motor has a three-dimensional flux path, the shape is complex, and the stator core is difficult to be manufactured by silicon steel laminations, so that a whole steel structure is generally adopted, and the stator core is manufactured into an integral structure and is not changed in processing.
SUMMERY OF THE UTILITY MODEL
In order to overcome claw utmost point motor and adopt the high shortcoming of whole steel core eddy current loss, reduce simultaneously and make the degree of difficulty and cost, the utility model provides a claw utmost point motor stator core and use this stator core's motor element. The stator yoke is made of silicon steel in a rolling mode, the stator claw poles are made of soft magnetic composite materials and fixed on the stator yoke in a modular mode, and manufacturing difficulty and cost are reduced on the premise that a three-dimensional magnetic flux path is guaranteed. The stator yoke portion rolled silicon steel is coated with the thin insulating layer, the rolling mode enables the magnetic flux path of the yoke portion to be parallel to the silicon steel sheet, and the magnetic flux path cannot penetrate through an insulating air gap between the silicon steel sheet and the silicon steel sheet, so that eddy current cannot be generated basically. Compared with the use of the soft magnetic composite material for the stator yoke, the eddy current loss is not increased, and the use amount of the soft magnetic composite material is reduced on the basis of not influencing the performance of the motor.
The utility model provides a technical scheme of technical problem:
the first aspect, the utility model provides a claw utmost point motor stator core, its characterized in that, this stator core include stator yoke and a plurality of stator claw utmost point, are provided with the fluting that is used for fixed stator claw utmost point on the terminal surface around the stator yoke, and every stator claw utmost point is a module, fixes the position in corresponding fluting, and the stator yoke is the ring column type that system silicon steel made for rolling up, and the stator claw utmost point adopts soft magnetic composite to make.
A plurality of stator claw poles are alternately fixed to both sides of the stator yoke.
The stator yoke is made of silicon steel materials, multiple layers of silicon steel sheets are radially laminated on the stator yoke, eddy current loss can be reduced, a magnetic flux path can be kept not to pass through insulation among the silicon steel sheets, insulating paint is coated on the surfaces of all the silicon steel sheets, and a plurality of strip-shaped silicon steel sheets coated with the insulating paint are wound to form a circular ring to form the stator yoke. The front end face and the rear end face of the stator yoke are provided with slots for fixing the stator claw poles, the shapes of the slots are consistent with the shapes of the upper ends of the stator claw poles, so that the stator yoke can be tightly combined with the stator claw poles, the yoke part using silicon steel is simple to manufacture, and waste of leftover materials is less.
The stator claw pole is in an inward hooked shape, the upper part of the stator claw pole is in a sector shape with a large upper part and a small lower part, and the upper end cambered surface of the stator claw pole is parallel to the side surface of the stator yoke circular ring.
The tail ends of a pair of stator claw poles which are distributed alternately correspond to a pair of permanent magnets with opposite polarities respectively, magnetic induction lines of the permanent magnets firstly enter the stator claw poles from the lower parts of the stator claw poles which are opposite to the permanent magnets, are shunted to the multi-layer silicon steel sheets of the stator yoke part through the stator claw poles, flow in parallel in each lamination which enters the stator yoke part, penetrate out of the lamination to enter the stator claw poles on the other side, and return to the adjacent permanent magnets after passing through the whole stator claw pole. The magnetic induction lines flow in each lamination of the stator yoke with little penetration of the intermediate insulating layer, i.e. no eddy currents. The stator core structure can ensure that a magnetic circuit passes through smoothly, can ensure that eddy current loss is low, and meets the requirement of three-dimensional magnetic flux characteristics.
In a second aspect, the invention further provides a motor assembly using the stator core, the motor assembly further comprises a rotor core, a permanent magnet and an armature winding, wherein the stator core is composed of silicon steel and a soft magnetic composite material, the stator yoke portion is manufactured in a rolled silicon steel mode, and the stator yoke is formed by winding a long-strip-shaped silicon steel sheet coated with insulating paint. The edge part of the stator yoke is grooved so as to place the stator claw pole and realize the connection with the stator claw pole. The stator claw pole part is made of soft magnetic composite materials, and the three-dimensional magnetic flux path of the motor mainly exists on the stator claw pole, so that the soft magnetic composite materials can ensure that magnetic flux can smoothly pass through, and the stator claw pole is manufactured in a mould pressing mode, so that the structure in the materials is not damaged. The shapes of a plurality of stator claw poles are completely consistent, and only one mold is needed.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses in use mixed material to stator core, two parts of stator yoke and stator claw utmost point are made into to the split. The stator yoke portion uses rolled silicon steel to keep the magnetic flux path of the magnetic flux at the yoke portion, the use of soft magnetic composite materials at the stator yoke portion is avoided, and cost is reduced. The stator claw pole part has a three-dimensional magnetic flux path, soft magnetic composite materials are used, and finally the stator claw pole and the stator yoke part are connected in a meshing and bonding mode.
Compared with the commonly adopted whole steel manufacturing method, the whole steel structure has no insulating layer, so that larger induced eddy current can be generated when magnetic flux passes through, and eddy current loss is further caused. And the utility model discloses well stator claw utmost point part adopts soft magnetic composite, stator yoke portion to adopt system silicon steel of book, and soft magnetic composite itself has the characteristics that the eddy current loss is low, has the insulating layer in the middle of the system silicon steel of book and has avoided the vortex, consequently compares and makes in whole steel and can follow to a great extent reduction stream loss to improve motor efficiency. Compared with the stator which adopts soft magnetic composite material, the stator yoke part adopts the rolled silicon steel, so that the using amount of the soft magnetic composite material can be reduced, and the cost is reduced; meanwhile, the winding mode ensures a magnetic flux path; the magnetic conductivity of the silicon steel is higher than that of the soft magnetic composite material, and the magnetic pressure drop on the iron core is favorably reduced. In addition, the material combination mode in this patent has satisfied the modularization of claw utmost point part naturally, because the yoke portion adopts the silicon steel material, is separated by the silicon steel between each claw utmost point naturally as shown in figure 4, but during production every claw utmost point independent preparation is favorable to reduction in production cost. The yoke part and the claw poles are separately manufactured, so that the coil can be arranged in the yoke part in advance, and then a plurality of stator claw poles are installed.
The utility model discloses claw utmost point motor stator core structure is not only limited to inner rotor motor, is applicable to external rotor motor simultaneously.
Drawings
Fig. 1 is a schematic view of the overall three-dimensional structure of the claw-pole permanent magnet motor of the present invention;
fig. 2 is a schematic perspective view of a stator core of a claw-pole permanent magnet motor according to the present invention;
FIG. 3 is a schematic perspective view of the silicon steel rolled at the yoke part of the stator core of the claw-pole permanent magnet motor of the present invention;
fig. 4 is a schematic perspective view of a stator claw-pole part of the claw-pole permanent magnet motor of the present invention;
fig. 5 is a schematic view of the stator core part of the magnetic path of the claw-pole permanent magnet motor of the present invention;
fig. 6 is a schematic perspective view of a single stator claw pole part of the claw pole permanent magnet motor of the present invention;
FIG. 7 shows that the current density of the motor winding of the present invention is 6A/mm2Motor torque map of time.
FIG. 8 shows the same concentration at 6A/mm2And the motor torque diagram is obtained when the stator cores are all made of soft magnetic composite materials under the current density.
Detailed Description
In order to explain the present invention specifically, the following description is made in conjunction with the accompanying drawings to further explain the embodiments of the present invention.
The utility model provides a claw utmost point permanent-magnet machine uses soft-magnetic combined material and silicon steel mixed structure's stator core, takes inner rotor claw utmost point permanent-magnet machine as an example, and then the iron core structure that proposes is the outside stator core to the motor. The motor comprises a rotor core 4, a stator core, a permanent magnet 5 and an armature winding 3, wherein the rotor core, the permanent magnet and the armature winding are made of materials and have a structure similar to that of a common claw pole permanent magnet motor, and the armature winding is arranged on the stator core and is wrapped by a stator claw pole 1 and a stator yoke 2; the permanent magnet is arranged on the side face of the rotor core opposite to the stator core, and a circle of air gap is formed between the permanent magnet and the stator core. The motor stator core is different from the existing claw pole permanent magnet motor. The stator claw is formed by molding a soft magnetic composite material, and the stator yoke is formed by rolling silicon steel laminations.
The utility model discloses the method adopts soft magnetic composite material mould pressing stator claw utmost point to claw utmost point permanent-magnet machine stator core to and system silicon steel stator yoke portion of book. The stator claw pole is produced in a modularized mode by separating the stator claw pole and the stator claw pole, so that the manufacturing difficulty is reduced; and the yoke part of the stator is made of silicon steel, so that the using amount of soft magnetic composite materials is reduced.
In order to maintain the three-dimensional magnetic flux path of the claw pole part, the stator claw pole adopts soft magnetic composite materials as magnetic conductive materials, and a plurality of stator claw poles of the claw pole part can be manufactured in a modularized mode; the connection of the stator yoke and the stator claw pole is realized by the following modes: and (3) slotting on the stator yoke to enable the stator yoke to be matched with the shape of the stator claw pole, then placing the stator claw pole on the slotted opening of the stator yoke, and fixing the stator claw pole in a bonding mode. Compared with an iron core made of a whole soft magnetic composite material, the structure of a single stator claw pole is simple, and the mold pressing manufacturing difficulty of the iron core made of the soft magnetic composite material can be reduced.
The utility model discloses creatively combines silicon steel sheet material and soft magnetic composite material together to make stator core, and soft magnetic composite material is a three-dimensional magnetic material, has characteristics that isotropy, eddy current loss are low, adopts the mode of mould pressing can avoid the destruction to soft magnetic composite material structure that leads to because the wire-electrode cutting, and it is relatively simple to use local modular stator claw utmost point shape simultaneously, has reduced the die sinking degree of difficulty, has reduced the influence to motor performance to the at utmost.
This application stator core is applicable to on the claw utmost point permanent-magnet machine, stator core uses different materials (soft-magnetic combined material, silicon steel) to combine, and the combination mode between two kinds of materials, the soft-magnetic combined material who has remain the stator claw utmost point part is as three-dimensional magnetic conduction, its three-dimensional magnetic flux characteristic has fully been considered, carry out the material replacement under guaranteeing the three-dimensional magnetic flux route of motor, select soft-magnetic combined material to do the stator claw utmost point, the quantity with soft-magnetic combined material falls to minimumly, therefore, the production is favorable to more, popularization and application, avoid adopting traditional along the axial system silicon steel of folding, and lead to the motor magnetic flux to pass the problem of inter-plate insulation in a large number and take place.
The utility model discloses stator yoke portion adopts the system silicon steel of book to replace whole stator to adopt soft magnetic composite material to be a comparatively ingenious mode compromise the magnetic flux route, reduce eddy current loss, the magnetic circuit begins from a stator claw utmost point lower part earlier, do not pass through the air gap, directly get into the stator yoke through whole stator claw utmost point, every lamination of stator yoke transmits the adjacent stator claw utmost point for the opposite side, make the magnetic circuit not pass through the insulating air gap between the silicon steel sheet, guarantee that the magnetic circuit passes through smoothly, can guarantee simultaneously that eddy current loss is lower again, also reduce material cost and the manufacturing degree of difficulty, magnetic flux route looks like figure 5 in the motor.
When the motor is an outer rotor motor, permanent magnets are uniformly distributed on the inner diameter side surface of an outer rotor, the magnetizing directions of adjacent permanent magnets are opposite, a stator core is coaxially arranged in the rotor, the lower part of a stator claw pole in the stator core is opposite to the position of the permanent magnets, and the upper part of the stator claw pole faces to a gap between the stator and the rotor and is arranged on a stator yoke.
FIG. 7 shows that the current density of the motor winding of the present invention is 6A/mm2Motor torque map of time. FIG. 8 shows the same concentration at 6A/mm2And the motor torque diagram is obtained when the stator cores are all made of soft magnetic composite materials under the current density. The relevant motor parameters at the time of the tests of fig. 7 and 8 are as follows:
| parameter(s) | Parameter value | Parameter(s) | Parameter value |
| Number of pole pairs | 6 | Air gap length | 1mm |
| Axial length | 18mm | Outer diameter of rotor | 19.5mm |
| Number of winding turns | 25 | Thickness of rotor core | 9mm |
| Current of winding | 9.7A | Thickness of permanent magnetDegree of rotation | 3mm |
| Outer diameter of stator | 33.5mm | Inner diameter of rotor | 10mm |
| Stator bore | 20.5mm | Permanent magnet material | NdFeBN |
| Thickness of stator yoke | 3mm | Rotor core material | 50ww471 |
6A/mm as mentioned in the text2The current density, equivalent to winding current 9.7A here, the air gap length refers to the air gap between the stator and the rotor. The pole pair number means that 6 pairs of permanent magnets are provided, and the total number is 12, and the number of claw poles is the same.
Comparing fig. 7 and fig. 8, it can be seen that the utility model discloses well motor torque is higher, this is because the yoke portion adopts silicon steel, and silicon steel magnetic permeability is higher than soft magnetic composite's reason. An increase in torque density (torque density ═ torque/motor volume, where the volume does not change the torque increase) is obtained.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (6)
1. The stator core of the claw-pole motor is characterized by comprising a stator yoke and a plurality of stator claw poles, wherein slots for fixing the stator claw poles are formed in the front end face and the rear end face of the stator yoke, each stator claw pole is a module and is fixed at the corresponding slot, the stator yoke is in a circular column shape made of rolled silicon steel, and the stator claw poles are made of soft magnetic composite materials.
2. The claw-pole motor stator core according to claim 1, wherein a plurality of stator claw poles are alternately fixed to both sides of the stator yoke.
3. The claw-pole motor stator core according to claim 1, wherein the stator claw poles are in the shape of inward hooks, the upper portions of the stator claw poles are in a sector shape with a large upper portion and a small lower portion, and the upper end arc surfaces of the stator claw poles are flush with the side surfaces of the stator yoke rings.
4. The claw-pole motor stator core according to claim 1, wherein the stator yoke is formed by laminating a plurality of silicon steel sheets in a radial direction thereof, all the silicon steel sheets having surfaces coated with an insulating varnish, a plurality of the elongated silicon steel sheets coated with the insulating varnish being wound to form a ring to form the stator yoke, and the shape of the slots being identical to the shape of the upper ends of the stator claw poles so that the stator yoke can be tightly combined with the stator claw poles.
5. An electric machine assembly using the stator core of any one of claims 1-4, further comprising a rotor core, permanent magnets, armature windings, wherein the stator claw pole portion is made of soft magnetic composite material and the stator claw poles are molded.
6. The motor assembly of claim 5, wherein the claw pole motor is an inner rotor motor or an outer rotor motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121219157.5U CN214674577U (en) | 2021-06-02 | 2021-06-02 | Claw-pole motor stator core and motor assembly applying same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121219157.5U CN214674577U (en) | 2021-06-02 | 2021-06-02 | Claw-pole motor stator core and motor assembly applying same |
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| CN214674577U true CN214674577U (en) | 2021-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315270A (en) * | 2021-06-02 | 2021-08-27 | 河北工业大学 | Claw-pole motor stator core and motor assembly applying same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315270A (en) * | 2021-06-02 | 2021-08-27 | 河北工业大学 | Claw-pole motor stator core and motor assembly applying same |
| CN113315270B (en) * | 2021-06-02 | 2024-06-25 | 河北工业大学 | Claw pole motor stator core and motor assembly using same |
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