CN112350465A - Stator core, wound stator, concentrated winding motor and production method - Google Patents
Stator core, wound stator, concentrated winding motor and production method Download PDFInfo
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- CN112350465A CN112350465A CN201910728716.6A CN201910728716A CN112350465A CN 112350465 A CN112350465 A CN 112350465A CN 201910728716 A CN201910728716 A CN 201910728716A CN 112350465 A CN112350465 A CN 112350465A
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- yoke
- tooth
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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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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Abstract
The invention discloses a stator core, a wound stator, a concentrated winding motor and a production method, wherein the stator core comprises: yoke portion structure and a plurality of tooth portion structure, yoke portion structure divide into a plurality of yoke portion structure section the same with tooth portion structure quantity, adopt tenon fourth of the twelve earthly branches connected mode with every yoke portion structure section and every tooth portion structure connection, a plurality of yoke portion structure sections end to end connection in proper order constitutes annular yoke portion structure of circle, a plurality of tooth portion structure are located same circumference. The invention reduces the cost of the stator core and the magnetic density in the tooth part structure, thereby reducing the iron loss of the winding type motor and realizing the purpose of improving the performance of the winding type motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a stator core, a wound stator, a concentrated winding motor and a production method.
Background
The motor may have distributed windings or concentrated windings, the differences between which are well known to the skilled person. The stator of the centralized winding motor used by the existing variable frequency air conditioner is a winding type variable frequency motor stator, the winding type motor stator consists of a stator core and an enameled wire winding coil, and the winding type variable frequency motor stator is manufactured by winding the winding coil on the stator core. The stator core is of a full-circle annular structure, and a certain number of grooves are formed in the stator core of the full-circle annular structure and used for containing wound enameled wire winding coils. The stator core with the full-circle annular structure is prepared by adopting a stamping process, or by adopting a winding technology, a silicon steel sheet strip material is used for replacing a traditional silicon steel sheet material as a raw material, and the stator core is prepared by the following steps: punching a toothed belt, spirally winding, laminating, welding and extruding and forming. As shown in fig. 1, the stator core has the tooth portion 20 and the yoke portion 10, and the tooth portion 20 and the yoke portion 10 are integrally formed, and a non-oriented silicon steel sheet material is required to be used for producing the stator core, which is expensive, and thus the production cost of the stator core is increased.
In addition, in the operation process of the centralized winding motor, the magnetic density (magnetic density, namely magnetic flux density, which refers to the number of magnetic lines of force passing through a unit area vertically and is also called magnetic induction intensity) of a yoke part is small, the magnetic density of a tooth part is large, the magnetic density is in direct proportion to the iron loss (the iron loss refers to the sum of hysteresis loss and eddy current loss of ferromagnetic materials in alternating and pulsating magnetic fields per unit mass), and the larger the magnetic density is, the larger the iron loss is generated, so that the problems that the production cost of a stator core is high and the iron loss of the motor is high in the motor stator core in the prior art, and the performance of the motor is reduced are solved.
Disclosure of Invention
The invention aims to provide a stator core, a wound stator, a concentrated winding motor and a production method, and aims to solve the problems that in the prior art, the performance of the motor is reduced due to high production cost of the stator core and high iron loss of the motor of the stator core of the motor.
In order to solve the problems, the invention is realized by the following technical scheme:
a stator core comprising: yoke portion structure and a plurality of tooth portion structure, yoke portion structure divide into with a plurality of yoke portion structure section that tooth portion structure quantity is the same adopts mortise-tenon joint mode with every yoke portion structure section and every tooth portion structural connection, a plurality of yoke portion structure section is end to end connection in proper order, constitutes annular yoke portion structure, a plurality of tooth portion structure is located same circumference.
Preferably, each yoke structure section is provided with a groove, each tooth structure is correspondingly arranged on the groove, and a gap is formed between every two adjacent tooth structures.
Preferably, the tooth structure comprises a first structure section and a second structure section, a first end of the first structure section is installed inside the groove, and a second end of the first structure section is connected with a first end of the second structure section; the second end of the second structural segment is proximate a center of the yoke structure.
Preferably, the first structure section is rectangular and the second structure section is trapezoidal.
Preferably, the first structural section expands from near the yoke structure center to away from the yoke structure center;
the second structural section tapers from proximate the yoke structure center to distal the yoke structure center.
Preferably, the first structure section is trapezoidal and the second structure section is trapezoidal.
Preferably, the second structure section comprises a bottom edge and two waists respectively used for connecting the bottom edge; the bottom edge is close to the center of the yoke structure, the bottom edge is arc-shaped, the waist is linear, and an included angle between the waist and the bottom edge is an acute angle.
Preferably, the first structure section and the groove form an interlocking structure and are clamped with each other.
Preferably, the ratio of the length of the bottom edge of the second end of the second structural section to the length of the second end of the first structural section is greater than or equal to 2.
Preferably, the tooth structure further includes: a third structural section located between and integrally formed with the first and second structural sections.
Preferably, the third structural section is rectangular.
Preferably, the material of the yoke structure section is a silicon steel material or an alloy material; the tooth structure is made of silicon steel materials or alloy materials.
In another aspect, a wound stator includes a stator core as described above, a plurality of coils are wound around each tooth structure, and each of the plurality of coils has two lead terminals, and the two lead terminals are respectively connected to a power supply or used as a neutral point according to phases.
In yet another aspect, a concentrated winding electric machine, comprising: the rotor is positioned in a central shaft hole surrounded by a plurality of tooth structures of the wound-type stator, and a gap is reserved between a second structure section of the tooth structure of the wound-type stator and the outer surface of the rotor.
In other aspects, a method of producing a wound stator, the wound stator being the wound stator described above, includes: preparing a die matched with the yoke structure sections, providing a first plate, and processing the first plate according to the die to respectively obtain a plurality of yoke structure sections;
and providing a second plate, and cutting the second plate according to the shape of the preset tooth structure to obtain a plurality of tooth structures.
Furthermore, each tooth structure is correspondingly connected with one yoke structure section in a mortise and tenon mode, and the tooth structure and the yoke structure section form a T-shaped structure;
winding the tooth part structure in the T-shaped structure to form a plurality of coils;
and sequentially connecting the yoke structure sections in two adjacent T-shaped structures in the T-shaped structures end to form the annular yoke structure, wherein all the tooth parts are positioned on the same circumferential line.
Further, the tooth structure comprises a first structure section and a second structure section, a first end of the first structure section is installed in a groove formed in the yoke structure section, and a second end of the first structure section is connected with a first end of the second structure section; a second end of the second structural segment is proximate a center of the yoke structure; the coils are all positioned on the second structure section of the tooth structure;
or the tooth structure comprises a first structure section, a second structure section and a third structure section, wherein the third structure section is positioned between the first structure section and the second structure section and is integrally formed with the first structure section and the second structure section; the first end of the first structure section is arranged in a groove arranged on the yoke structure section, and the second end of the first structure section is connected with the first end of the second structure section; a second end of the second structural segment is proximate a center of the yoke structure; the plurality of coils are located on the second structure section and the third structure section of the tooth structure.
Furthermore, after the winding of the tooth structure is completed, the tooth structure is provided with two lead ends; dividing all the tooth structures into a u-phase group, a v-phase group and a w-phase group, and connecting coils of all the tooth structures in the u-phase group in parallel or in series, wherein the u-phase group integrally has two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point;
in analogy, after coils of the tooth structures in the v-phase group are connected in parallel or in series, the v-phase group integrally has two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point;
after coils of the tooth structures in the w-phase groups are connected in parallel or in series, the w-phase groups integrally have two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point;
and connecting all the lead terminals as neutral points to serve as the neutral points of the concentrated winding motor.
Compared with the prior art, the invention has the following advantages:
1. the present invention provides a stator core, comprising: yoke portion structure and a plurality of tooth portion structure, yoke portion structure divide into with a plurality of yoke portion structure section that tooth portion structure quantity is the same adopts mortise-tenon joint mode with every yoke portion structure section and every tooth portion structural connection, a plurality of yoke portion structure section is end to end connection in proper order, constitutes annular yoke portion structure, a plurality of tooth portion structure is located same circumference. The tooth structure and the yoke structure of the wound stator are of separate structures and can be detachably mounted, the yoke structure is manufactured by the existing stamping process, the process difficulty of the integrally formed stator core is reduced, the scrappage of manufacturing materials is reduced, and the production cost is reduced.
2. When will yoke portion structure divide into two mutual symmetry yoke portion structure sections, it can adopt the preparation of symmetry formula stamping process yoke portion structure section, its further reduction has had the preparation the technology degree of difficulty of integrated into one piece's stator core, has reduced the volume of scraping of preparing its material, has reduced manufacturing cost.
3. For the tooth part structure, the stator core can be prepared by adopting an iron core material with low iron loss and high magnetic conductance, and the material has the characteristics of brittle material, low ductility and flexibility and thin thickness, so the material is not suitable for being prepared by adopting the traditional stamping process to stamp the material to prepare the integrally formed stator core, the material is cracked by adopting the stamping process, the yield is low, the material is wasted, and the preparation cost is increased.
4. The tooth structure provided by the invention is provided with a first structure section and a second structure section, and the ratio of the length of the bottom edge of the second structure section close to the center of the yoke structure to the length of the rectangular edge of the first structure section, which is in contact with the groove, is greater than or equal to 2, so that the falling-off risk of a coil wound on the tooth structure is reduced.
5. Furthermore, the tooth structure of the present invention has a third structure section located between the first structure section and the second structure section, the coil is located on the third structure section and/or the second structure section, and the presence of the third structure section further reduces the risk of the coil wound on the tooth structure falling off.
6. The technical scheme that the yoke structure comprises a plurality of yoke structure sections is that a first structure section in each tooth structure is correspondingly connected with a groove on one yoke structure section and is fixed by adhesive, the tooth structure and the yoke structure sections form a T-shaped structure, at the moment, an enamelled wire is adopted to wind the tooth structure in the T-shaped structure to form a plurality of coils, and the yoke structure sections are spliced after the winding of the tooth structure is finished, so that the installation mode that the T-shaped structure is separately wound and spliced is compared with the installation mode that an integrally formed stator is firstly formed and then the coils are wound in the prior art, the number of the coils which can be wound on each tooth structure can be increased, the performance of the wound machine is further improved.
7. In the technical scheme that the yoke structure comprises a plurality of yoke structure sections, namely, a first structure section in each tooth structure is correspondingly connected with the groove on one yoke structure section, the tooth structure and the yoke structure sections form a T-shaped structure, wherein the yoke structure sections and the tooth structure can be prepared by adopting an oriented silicon steel material or a low-iron-loss and high-magnetic-conductivity material, the integrally formed stator in the prior art can be prepared by adopting a non-oriented silicon steel material, and the price of the non-oriented silicon steel material is higher than that of the oriented silicon steel material, so that the cost of the stator core or the wound stator can be further reduced.
Drawings
Fig. 1 is a schematic view of a conventional wound stator;
fig. 2 is a main structural schematic view of a yoke structure in a stator core provided in a first embodiment of the invention;
fig. 3 is a main structural schematic diagram of a tooth structure in a stator core according to a first embodiment of the present invention;
fig. 4 is a schematic view of an overall structure of a stator core according to a first embodiment of the present invention;
fig. 5 is a main structural diagram of a tooth structure in a stator core according to a second embodiment of the present invention;
fig. 6 is a main structural view of a yoke structure in a stator core according to a second embodiment of the present invention;
fig. 7 is a schematic view of an overall structure of a stator core according to a second embodiment of the present invention;
fig. 8 is a main structural view of a tooth structure in a stator core according to a third embodiment of the present invention;
fig. 9 is a schematic view of an overall structure of a stator core according to a third embodiment of the present invention;
fig. 10 is a schematic diagram illustrating respective included angles of a first structural segment and a second structural segment in a tooth structure of a stator core according to a third embodiment of the present invention;
fig. 11 is a schematic structural diagram of a stator core according to a fourth embodiment of the present invention after a tooth structure and a yoke structure are spliced together;
fig. 12 is a schematic view of an overall structure of a stator core according to a fourth embodiment of the present invention.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. Advantages and features of the present invention will become apparent from the following description and claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific details must be set forth in order to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art.
It is to be noted that the drawings are in a very simplified form and employ non-precise ratios for the purpose of facilitating and distinctly facilitating the description of one embodiment of the present invention. In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The core idea of the invention is to provide a stator core, a wound stator, a concentrated winding motor and a production method, wherein the stator core comprises: the yoke structure is divided into a plurality of yoke structure sections with the same number as the tooth structures, each yoke structure section is connected with each tooth structure in a tenon-and-mortise connection mode, the yoke structure sections are sequentially connected end to form the annular yoke structure, and the tooth structures are located on the same circumferential line; the tooth structure and the yoke structure of the wound stator are of separate structures and can be detachably mounted, the yoke structure is manufactured by the existing stamping process, the process difficulty of the integrally formed stator core is reduced, the scrappage of manufacturing materials is reduced, and the production cost is reduced. When will yoke portion structure divide into two mutual symmetry yoke portion structure sections, it can adopt the preparation of symmetry formula stamping process yoke portion structure section, its further reduction has had the preparation the technology degree of difficulty of integrated into one piece's stator core, has reduced the volume of scraping of preparing its material, has reduced manufacturing cost. For the tooth part structure, the stator core can be prepared by adopting an iron core material with low iron loss and high magnetic conductance, and the material has the characteristics of brittle material, low ductility and flexibility and thin thickness, so the material is not suitable for being prepared by adopting the traditional stamping process to stamp the material to prepare the integrally formed stator core, the material is cracked by adopting the stamping process, the yield is low, the material is wasted, and the preparation cost is increased.
Example one
As shown in fig. 2 to 4, the present embodiment provides a stator core including: yoke portion structure 100 and a plurality of tooth structure 200, yoke portion structure 100 divide into a plurality of yoke portion structure section 102, a plurality of yoke portion structure section 102 end to end connection in proper order, tooth structure 200 match connection yoke portion structure 100 orientation on one side at yoke portion structure 100 center, every yoke portion structure section 102 is last to connect a plurality of through the mortise-tenon joint mode tooth structure 200.
The plurality of yoke structure sections 102 are connected end to end, so that the yoke structure is in a circular ring shape; each yoke structure segment 102 is provided with a plurality of grooves 101, the number of the tooth structures 200 is the same as that of the grooves 101, each tooth structure 200 is correspondingly embedded in the groove 101, the tooth structures 200 are located on the same circumferential line, and a gap (not marked in the figure) is formed between every two adjacent tooth structures 200.
With reference to fig. 2, in the present embodiment, the yoke structure 100 is divided into two yoke structure segments 102 that are symmetrical to each other, a head portion (a first end portion) of each yoke structure segment 102 is provided with a protrusion 1010, a tail portion (a second end portion) of each yoke structure segment 102 is provided with a recess 1011 matching with the protrusion 1010, the protrusion 1010 of the head portion of one yoke structure segment 102 of the two yoke structure segments 102 is clamped with the recess 1011 of the tail portion of the other yoke structure segment 102, and the protrusion 1010 is located inside the recess 1011; as shown in fig. 4, the recessed portion 1011 at the tail of one yoke structure segment 102 of the two yoke structure segments 102 is clamped with the protruding portion 1010 at the head of the other yoke structure segment 102, and the protruding portion 1010 is located inside the recessed portion 1011, so that the two yoke structure segments 102 are connected end to form the circular yoke structure 100. The yoke structure section can be prepared by adopting a symmetrical stamping process, the process difficulty of the integrally formed wound stator is further reduced, the scrappage of materials for preparing the wound stator is reduced, and the production cost is reduced. In some other embodiments, the connecting members may be used to fixedly connect the head and tail portions of the two yoke structure segments 102 that contact each other.
With continuing reference to fig. 3, as shown in fig. 3, for convenience of description, the tooth structure is divided into a first structure section 201 and a second structure section 202 by using the dotted line shown in fig. 3 as a boundary in this embodiment, a first end of the first structure section 201 is installed inside the groove 101, and a second end of the first structure section 201 is connected with a first end of the second structure section 202 (i.e. in practice, the first structure section 201 and the second structure section are integrally disposed and located in the same plane); the second end of the second structure section 202 is close to the center of the yoke structure 100 (i.e. the center of the circular ring-shaped yoke structure 100).
In this embodiment, the first structure section 201 is rectangular, and the second structure section 202 is trapezoidal; the ratio of the length L2 of the bottom side of the second structure section 202 close to the center of the yoke structure 100 to the length L1 of the rectangular side of the first structure section 201 in contact with the groove 101 is greater than or equal to 2. Which reduces the risk of the coils subsequently wound onto the tooth structure falling off. In this embodiment, the yoke structure 100 is made of non-oriented silicon steel, the tooth structure 200 is made of a low-iron-loss and high-permeability core material, which includes but is not limited to amorphous alloy materials, including but not limited to iron-based, iron-nickel-based, cobalt-based amorphous alloys, and iron-based nanocrystalline alloys. The tooth part structure prepared by adopting the material effectively reduces the magnetic density on the tooth part structure, thereby reducing the iron loss of the winding type motor and further achieving the purpose of improving the performance of the winding type motor. In some other embodiments, the bottom side of the second structure segment 202 near the center of the yoke structure 100 may be a straight line or an inwardly concave (the center of the circular arc is near the center of the yoke structure 100) circular arc.
Example two
As shown in fig. 5 to 7, the present embodiment provides a stator core including: yoke portion structure 100 and a plurality of tooth structure 200, yoke portion structure 100 divide into a plurality of yoke portion structure section 102, a plurality of yoke portion structure section 102 end to end connection in proper order, tooth structure 200 match connection yoke portion structure 100 orientation on one side at yoke portion structure 100 center, every yoke portion structure section 102 is last to connect a plurality of through the mortise-tenon joint mode tooth structure 200.
The plurality of yoke structure sections 102 are connected end to end, so that the yoke structure is in a circular ring shape; each yoke structure segment 102 is provided with a plurality of grooves 101, the number of the tooth structures 200 is the same as that of the grooves 101, each tooth structure 200 is correspondingly embedded in the groove 101, the tooth structures 200 are located on the same circumferential line, and a gap (not marked in the figure) is formed between every two adjacent tooth structures 200.
Referring to fig. 6, in the present embodiment, the yoke structure 100 is divided into two yoke structure segments 102 that are symmetrical to each other, a head portion (a first end portion) of each yoke structure segment 102 is provided with a protrusion 1010, a tail portion (a second end portion) of each yoke structure segment 102 is provided with a recess 1011 matching with the protrusion 1010, the protrusion 1010 of the head portion of one yoke structure segment 102 of the two yoke structure segments 102 is clamped with the recess 1011 of the tail portion of the other yoke structure segment 102, and the protrusion 1010 is located inside the recess 1011; as shown in fig. 7, the recessed portion 1011 at the tail of one yoke structure segment 102 of the two yoke structure segments 102 is clamped with the protruding portion 1010 at the head of the other yoke structure segment 102, and the protruding portion 1010 is located inside the recessed portion 1011, so that the two yoke structure segments 102 are connected end to form the circular yoke structure 100. The yoke structure section can be prepared by adopting a symmetrical stamping process, the process difficulty of the integrally formed wound stator is further reduced, the scrappage of materials for preparing the wound stator is reduced, and the production cost is reduced. In some other embodiments, the connecting members may be used to fixedly connect the head and tail portions of the two yoke structure segments 102 that contact each other.
With reference to fig. 5, as shown in fig. 5, for convenience of description, the tooth structure is divided into a first structure section 201 and a second structure section 202 by using the dotted line shown in fig. 5 as a boundary in this embodiment, a first end of the first structure section 201 is installed inside the groove 101, and a second end of the first structure section 201 is connected with a first end of the second structure section 202 (i.e. in practice, the first structure section 201 and the second structure section are integrally disposed and located in the same plane); the second end of the second structure section 202 is close to the center of the yoke structure 100 (i.e. the center of the circular ring-shaped yoke structure 100).
In this embodiment, the first structural section 201 expands from near the center of the yoke structure 100 to far from the center of the yoke structure 100; the second structural section 202 tapers from near the center of the yoke structure 100 to away from the center of the yoke structure 100. The first structure section 201 is trapezoidal, and the second structure section 202 is trapezoidal; the first structure section 201 is reversely disposed on the second structure section 202, that is, the upper bottom edge of the first structure section 201 is connected to the upper bottom edge of the second structure section 202 (the length of the upper bottom edge of the first structure section is equal to the length of the upper bottom edge of the second structure section or both the first structure section and the second structure section share one upper bottom edge, specifically, refer to the dotted line portion shown in fig. 5, which is only for convenience of description, it is illustrated that the first structure section 201 and the second structure section 202 both have upper bottom edges, and actually, the contacting portions of the first structure section 201 and the second structure section 202 are integrally disposed and do not have the upper bottom edges), the lower bottom edge of the first structure section 201 is in contact with the inside of the groove 101, and the lower bottom edge of the second structure section 202 is close to the center of the yoke structure. Preferably, the first structure section 201 and the groove 101 form an interlocking structure and are clamped with each other, so that the connection between the two is more stable.
The ratio of the length L2 of the lower base of the second structural section 202 to the length L1 of the upper base of the first structural section is greater than or equal to 2. Which reduces the risk of the coils subsequently wound onto the tooth structure falling off. In this embodiment, the yoke structure 100 is made of non-oriented silicon steel, the tooth structure 200 is made of a low-iron-loss and high-permeability core material, which includes but is not limited to amorphous alloy materials, including but not limited to iron-based, iron-nickel-based, cobalt-based amorphous alloys, and iron-based nanocrystalline alloys. The tooth part structure prepared by adopting the material effectively reduces the magnetic density on the tooth part structure, thereby reducing the iron loss of the winding type motor and further achieving the purpose of improving the performance of the winding type motor. In some other embodiments, the bottom side of the second structure segment 202 near the center of the yoke structure 100 may be a straight line or an inwardly concave (the center of the circular arc is near the center of the yoke structure 100) circular arc.
EXAMPLE III
Referring to fig. 8 to 10, the present embodiment provides a stator core, including: yoke portion structure 100 and a plurality of tooth structure 200, yoke portion structure 100 divide into a plurality of yoke portion structure section 102, a plurality of yoke portion structure section 102 end to end connection in proper order, tooth structure 200 match connection yoke portion structure 100 orientation on one side at yoke portion structure 100 center, every yoke portion structure section 102 is last to connect a plurality of through the mortise-tenon joint mode tooth structure 200.
The plurality of yoke structure sections 102 are connected end to end, so that the yoke structure is in a circular ring shape; each yoke structure segment 102 is provided with a plurality of grooves 101, the number of the tooth structures 200 is the same as that of the grooves 101, each tooth structure 200 is correspondingly embedded in the groove 101, the tooth structures 200 are located on the same circumferential line, and a gap (not marked in the figure) is formed between every two adjacent tooth structures 200.
Referring to fig. 9, in the present embodiment, the yoke structure 100 is divided into two yoke structure segments 102 that are symmetrical to each other, a head portion (a first end portion) of each yoke structure segment 102 is provided with a protruding portion (not shown), a tail portion (a second end portion) of each yoke structure segment 102 is provided with a recessed portion (not shown) that matches the protruding portion, the protruding portion of the head portion of one yoke structure segment 102 of the two yoke structure segments 102 is engaged with the recessed portion of the tail portion of the other yoke structure segment 102, and the protruding portion is located inside the recessed portion; as can be seen from fig. 9, the two yoke structure segments 102 are connected end to form the circular yoke structure 100, wherein the recess at the tail of one yoke structure segment 102 of the two yoke structure segments 102 is clamped with the protrusion at the head of the other yoke structure segment 102, and the protrusion is located inside the recess. The yoke structure section can be prepared by adopting a symmetrical stamping process, the process difficulty of the integrally formed wound stator is further reduced, the scrappage of materials for preparing the wound stator is reduced, and the production cost is reduced. In some other embodiments, the connecting members may be used to fixedly connect the head and tail portions of the two yoke structure segments 102 that contact each other.
With continued reference to fig. 8, for convenience of description, the tooth structure is divided into a first structure segment 201, a second structure segment 202 and a third structure segment 203 by using two dotted lines shown in fig. 8 as a boundary,
the third structure section 203 is located between the first structure section 201 and the second structure section 202, and is integrally formed with the first structure section 201 and the second structure section 202. In this embodiment, the third structural section 203 is rectangular.
A first end of the first structure section 201 is installed inside the groove 101, and a second end of the first structure section 201 is connected with a first end of the third structure section 203; a second end of the third structure segment 203 is connected to a first end of the second structure segment 202, and a second end of the second structure segment 202 is close to the center of the yoke structure 100 (i.e., the center of the circular ring-shaped yoke structure 100).
In this embodiment, the first structural section 201 expands from near the center of the yoke structure 100 to far from the center of the yoke structure 100; the second structural section 202 tapers from near the center of the yoke structure 100 to away from the center of the yoke structure 100. The first structure section 201 is trapezoidal, and the second structure section 202 is trapezoidal; the first structure section 201 is reversely disposed on the third structure section 203, that is, the upper bottom edge of the first structure section 201 is connected to the first rectangular edge of the third structure section 203 (the length of the upper bottom edge of the first structure section is equal to the length of the first rectangular edge of the third structure section, specifically, refer to the dashed line portion shown in fig. 8), the lower bottom edge of the first structure section 201 is in contact with the inside of the groove 101, the second rectangular edge of the third structure section 203 opposite to the first rectangular edge is connected to the upper bottom edge of the second structure section 202, and the lower bottom edge of the second structure section 202 is close to the center of the yoke structure. Preferably, the first structure section 201 and the groove 101 form an interlocking structure and are clamped with each other, so that the connection between the two is more stable.
Referring to fig. 10, the range of the included angle α between the two waists of the trapezoidal first structural section 201 and the lower bottom side is: 0 degrees < alpha <45 degrees, and the range of an included angle beta between two waists of the trapezoidal second structure section 202 and an extension line of a third rectangular side of the third structure section 203, which is perpendicular to the first rectangular side, is as follows: 0 ° < β < γ, where γ represents the limit that can be reached by the angle β when two adjacent second structure sections 202 are in contact (i.e. the coil recess for accommodating the coil has no coil recess opening, the coil recess opening being 0). At this time, if the included angle β is increased, the two adjacent second structure segments 202 are in contact after splicing. Normally, two adjacent second structure segments 202 are not contactable.
In some other embodiments, the first structure segment 201 may be a rectangle that shares the same rectangular side as the third structure segment 203.
The ratio of the length L2 of the lower base of the second structural section 202 to the length L1 of the upper base of the first structural section is greater than or equal to 2. Which reduces the risk of the coils subsequently wound onto the tooth structure falling off. In this embodiment, the yoke structure 100 is made of non-oriented silicon steel, the tooth structure 200 is made of a low-iron-loss and high-permeability core material, which includes but is not limited to amorphous alloy materials, including but not limited to iron-based, iron-nickel-based, cobalt-based amorphous alloys, and iron-based nanocrystalline alloys. The tooth part structure prepared by adopting the material effectively reduces the magnetic density on the tooth part structure, thereby reducing the iron loss of the winding type motor and further achieving the purpose of improving the performance of the winding type motor.
Example four
As shown in fig. 11 to 12, the present embodiment provides a stator core including: yoke structure 100 and a plurality of tooth structure 200, yoke structure 100 divide into with tooth structure 200 a plurality of yoke structure section 102 that the quantity is the same, adopt the mortise-tenon joint mode with every yoke structure section 102 is connected with every tooth structure 200, and is a plurality of yoke structure section 102 is end to end connection in proper order, constitutes annular yoke structure 100, a plurality of tooth structure 200 is located same circumferencial line.
Each yoke structure segment 102 is provided with a groove 101, and each tooth structure 200 is correspondingly arranged on the groove 101; the tooth structure 200 and the yoke structure section 102 form a T-shaped structure; the yoke structure sections 102 of the T-shaped structures are connected end to end, so that the yoke structure 100 is annular; two adjacent tooth structures 100 have a gap (not shown) therebetween, which is a coil groove for accommodating a coil.
With reference to fig. 11 and fig. 12, in the present embodiment, the yoke structure 100 is divided into a plurality of yoke structure segments 102 that are symmetrical to each other, a head portion (a first end portion) of each yoke structure segment 102 is provided with a protruding portion 1010, a tail portion (a second end portion) of each yoke structure segment 102 is provided with a recessed portion 1011 matching with the protruding portion 1010, the protruding portion 1010 of the head portion of one yoke structure segment 102 of two adjacent yoke structure segments 102 is mutually clamped with the recessed portion 1011 of the tail portion of the other yoke structure segment 102, and the protruding portion 1010 is located inside the recessed portion 1011; as shown in fig. 12, a plurality of yoke structure segments 102 are connected end to form the circular yoke structure 100, wherein a concave portion 1011 at the tail of one yoke structure segment 102 of the two adjacent yoke structure segments 102 is clamped with a convex portion 1010 at the head of the other yoke structure segment 102, and the convex portion 1010 is located inside the concave portion 1011. The yoke structure section can be prepared by adopting a symmetrical stamping process, the process difficulty of the integrally formed wound stator is further reduced, the scrappage of materials for preparing the wound stator is reduced, and the production cost is reduced. In some other embodiments, the connecting members may be used to fixedly connect the head and tail portions of the two yoke structure segments 102 that contact each other.
The tooth structure 200 may be the tooth structure described in any one of the first to third embodiments, and is not described herein again.
Preferably, the material of the yoke structure section 102 is an oriented silicon steel material or a low-iron-loss and high-permeability iron core material; the tooth structure 200 is made of silicon steel material or iron core material with low iron loss and high magnetic conductance; the iron core material with low iron loss and high magnetic conductance comprises but is not limited to an alloy material, the alloy material comprises an amorphous alloy material, and the amorphous alloy material comprises but is not limited to iron-based, iron-nickel-based, cobalt-based amorphous alloy and iron-based nanocrystalline alloy; the silicon steel material comprises an oriented silicon steel material and a non-oriented silicon steel material.
Since the magnetic field in the yoke structure section 102 is a transverse flowing magnetic field and the magnetic field in the tooth structure is a longitudinal flowing magnetic field, both the yoke structure section and the tooth structure can be prepared by using oriented silicon steel materials or low-iron-loss and high-permeability materials, the integrally formed stator in the prior art can only be prepared by using non-oriented silicon steel materials, and the price of the non-oriented silicon steel materials is higher than that of the oriented silicon steel materials, so that the cost of the wound stator can be further reduced, the magnetic density in the tooth structure and/or the yoke structure can be reduced, the iron loss of the wound motor can be reduced, and the performance of the wound motor can be improved.
Based on the same inventive concept, the present invention further provides a wound stator, including a stator core as described in any one of the first to fourth embodiments, wherein a plurality of coils (not shown) are disposed around each of the tooth structures in the stator core, and each of the plurality of coils has two lead terminals, and the two lead terminals are respectively connected to a power supply (not shown) or serve as a neutral point according to phases.
Based on the same inventive concept, the invention also provides a concentrated winding motor, comprising: the motor comprises a base, the wound stator and a rotor, wherein the wound stator is installed on the base, the rotor is located at the center of the wound stator, and a gap is formed between the second structure section of the tooth structure of the wound stator and the outer surface of the rotor.
Based on the above embodiment, the present invention further provides a method for producing a wound stator, including: when the yoke structure comprises two yoke structure sections which are symmetrical to each other as described in the first to third embodiments, preparing a die matched with the yoke structure sections, providing a non-oriented silicon steel material plate, and stamping the non-oriented silicon steel material plate according to the die by adopting a stamping process to obtain the yoke structure sections; providing a low-iron-loss and high-magnetic-conductance iron core material plate, and cutting the low-iron-loss and high-magnetic-conductance iron core material plate by adopting a cutting process according to the shape of the tooth structure, so as to obtain the tooth structure.
Connecting a first structure section in the tooth structure with the groove, and fixing by adopting an adhesive; after all the tooth part structures are installed, the two yoke structure sections are connected end to form the annular yoke structure, and fixing parts are adopted to fix the head and the tail of the two yoke structure sections respectively; winding one tooth structure by using one enameled wire to form a plurality of coils, wherein the plurality of coils are all positioned on the second structure section and/or the third structure section of the tooth structure; after the winding of the tooth structure is finished, the tooth structure is provided with two lead ends; after all the tooth structures are wound, each wound tooth structure is provided with two lead ends; the tooth structure is divided into a u-phase group, a v-phase group and a w-phase group, after coils of the tooth structure in the u-phase group are connected in parallel or in series, the u-phase group integrally has two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point. And in analogy, after the coils of the tooth structures in the v-phase group are connected in parallel or in series, the v-phase group integrally has two lead terminals, wherein one lead terminal is connected to a power supply, and the other lead terminal is used as a neutral point. After coils of the tooth structures in the w-phase groups are connected in parallel or in series, the w-phase groups integrally have two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point. And connecting all the lead terminals as neutral points to serve as the neutral points of the concentrated winding motor.
Preferably, when the yoke structure comprises a plurality of yoke structure segments as described in the fourth embodiment, a mold matched with the yoke structure segments is prepared, a first plate material is provided, and the first plate material is processed according to the mold to obtain a plurality of yoke structure segments respectively; specifically, the first plate is stamped by a stamping process according to the die to obtain the yoke structure section;
and providing a second plate, and cutting the second plate according to the shape of the preset tooth structure to obtain a plurality of tooth structures. Specifically, the second plate is cut by a cutting process to obtain the tooth structure.
Correspondingly connecting each tooth structure with one yoke structure section in a mortise-tenon manner and/or fixing the tooth structures by adopting an adhesive, wherein the tooth structures and the yoke structure sections form a T-shaped structure;
winding the tooth part structure in the T-shaped structure by using an enameled wire to form a plurality of coils;
and sequentially connecting the yoke structure sections in two adjacent T-shaped structures in the T-shaped structures end to form the annular yoke structure, wherein all the tooth parts are positioned on the same circumferential line.
When the tooth structure comprises the first structure section and the second structure section, the first end of the first structure section is arranged in the groove arranged on the yoke structure section, and the second end of the first structure section is connected with the first end of the second structure section; a second end of the second structural segment is proximate a center of the yoke structure; the coils are all positioned on the second structure section of the tooth structure;
or, when the tooth structure comprises the first structure section, the second structure section and the third structure section as described above, the third structure section is located between the first structure section and the second structure section and is integrally formed with the first structure section and the second structure section; the first end of the first structure section is arranged in a groove arranged on the yoke structure section, and the second end of the first structure section is connected with the first end of the second structure section; a second end of the second structural segment is proximate a center of the yoke structure; the plurality of coils are located on the second structure section and the third structure section of the tooth structure.
The first plate is made of a non-oriented silicon steel material, an oriented silicon steel material or an amorphous alloy material; the second plate is made of an oriented silicon steel material or an amorphous alloy material, wherein when the first plate is made of an amorphous alloy material, the yoke structure section is prepared by a cutting process.
The tooth structure in the T-shaped structure is divided into a u-phase group, a v-phase group and a w-phase group, after coils of the tooth structure in the u-phase group are connected in parallel or in series, the u-phase group integrally has two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point.
And in analogy, after the coils of the tooth structures in the v-phase group are connected in parallel or in series, the v-phase group integrally has two lead terminals, wherein one lead terminal is connected to a power supply, and the other lead terminal is used as a neutral point.
After coils of the tooth structures in the w-phase groups are connected in parallel or in series, the w-phase groups integrally have two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point.
And connecting all the lead terminals as neutral points to serve as the neutral points of the concentrated winding motor.
In summary, the present invention provides a stator core, which includes: yoke portion structure and a plurality of tooth portion structure, yoke portion structure divide into with a plurality of yoke portion structure section that tooth portion structure quantity is the same adopts mortise-tenon joint mode with every yoke portion structure section and every tooth portion structural connection, a plurality of yoke portion structure section is end to end connection in proper order, constitutes annular yoke portion structure, a plurality of tooth portion structure is located same circumference. The tooth structure and the yoke structure of the wound stator are of separate structures and can be detachably mounted, the yoke structure is manufactured by the existing stamping process, the process difficulty of the integrally formed stator core is reduced, the scrappage of manufacturing materials is reduced, and the production cost is reduced. When will yoke portion structure divide into two mutual symmetry yoke portion structure sections, it can adopt the preparation of symmetry formula stamping process yoke portion structure section, its further reduction has had the preparation the technology degree of difficulty of integrated into one piece's stator core, has reduced the volume of scraping of preparing its material, has reduced manufacturing cost. For the tooth part structure, the stator core can be prepared by adopting an iron core material with low iron loss and high magnetic conductance, and the material has the characteristics of brittle material, low ductility and flexibility and thin thickness, so the material is not suitable for being prepared by adopting the traditional stamping process to stamp the material to prepare the integrally formed stator core, the material is cracked by adopting the stamping process, the yield is low, the material is wasted, and the preparation cost is increased. The tooth structure provided by the invention is provided with a first structure section and a second structure section, and the ratio of the length of the bottom edge of the second structure section close to the center of the yoke structure to the length of the rectangular edge of the first structure section, which is in contact with the groove, is greater than or equal to 2, so that the falling-off risk of a coil wound on the tooth structure is reduced. Furthermore, the tooth structure of the present invention has a third structure section located between the first structure section and the second structure section, the coil is located on the third structure section and/or the second structure section, and the presence of the third structure section further reduces the risk of the coil wound on the tooth structure falling off. The technical scheme that the yoke structure comprises a plurality of yoke structure sections is that a first structure section in each tooth structure is correspondingly connected with a groove on one yoke structure section and is fixed by adhesive, the tooth structure and the yoke structure sections form a T-shaped structure, at the moment, an enamelled wire is adopted to wind the tooth structure in the T-shaped structure to form a plurality of coils, and the yoke structure sections are spliced after the winding of the tooth structure is finished, so that the installation mode that the T-shaped structure is separately wound and spliced is compared with the installation mode that an integrally formed stator is firstly formed and then the coils are wound in the prior art, the number of the coils which can be wound on each tooth structure can be increased, the performance of the wound machine is further improved. For the technical scheme that the yoke structure comprises a plurality of yoke structure sections, namely, the first structure section in each tooth structure is correspondingly connected with the groove on one yoke structure section, the tooth structure and the yoke structure section form a T-shaped structure, wherein the yoke structure sections and the tooth structure can be prepared by adopting oriented silicon steel materials or low-iron-loss and high-magnetic-conductivity materials, the integrally formed stator in the prior art can be prepared by adopting non-oriented silicon steel materials only, and the price of the non-oriented silicon steel materials is known to be more expensive than that of the oriented silicon steel materials, so that the cost of the wound stator can be further reduced, the magnetic density in the tooth structure and/or the yoke structure is reduced, and the iron loss of the wound motor is reduced, the performance of the winding type motor is improved.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (16)
1. A stator core, comprising: yoke portion structure and a plurality of tooth portion structure, yoke portion structure divide into with a plurality of yoke portion structure section that tooth portion structure quantity is the same adopts mortise-tenon joint mode with every yoke portion structure section and every tooth portion structural connection, a plurality of yoke portion structure section is end to end connection in proper order, constitutes annular yoke portion structure, a plurality of tooth portion structure is located same circumference.
2. The stator core according to claim 1 wherein each yoke structure segment has a slot, each tooth structure is correspondingly disposed in the slot, and a gap is formed between two adjacent tooth structures.
3. The stator core of claim 2 wherein the tooth structure includes a first structure segment and a second structure segment, a first end of the first structure segment being mounted within the slot, a second end of the first structure segment being connected to a first end of the second structure segment; the second end of the second structural segment is proximate a center of the yoke structure.
4. The stator core according to claim 3 wherein the first structural segment is rectangular and the second structural segment is trapezoidal.
5. The stator core according to claim 3,
the first structural segment expands from proximate the yoke structure center to distal the yoke structure center;
the second structural section tapers from proximate the yoke structure center to distal the yoke structure center.
6. The stator core according to claim 5 wherein the first structural segment is trapezoidal and the second structural segment is trapezoidal.
7. The stator core according to claim 5 wherein said second structural section includes a base and two waists each for connecting said base; the bottom edge is close to the center of the yoke structure, the bottom edge is arc-shaped, the waist is linear, and an included angle between the waist and the bottom edge is an acute angle.
8. The stator core according to claim 4, 6 or 7, wherein a ratio of a length of a bottom side of the second end of the second structural section to a length of the second end of the first structural section is greater than or equal to 2.
9. The stator core according to any one of claims 3 to 7, wherein the tooth structure further comprises: a third structural section located between and integrally formed with the first and second structural sections.
10. The stator core of claim 9 wherein the third structural segment is rectangular.
11. The stator core according to claim 1, wherein the yoke structure segments are made of a silicon steel material or an alloy material; the tooth structure is made of silicon steel materials or alloy materials.
12. A wound stator comprising a stator core according to any one of claims 1 to 11, wherein a plurality of coils are wound around each of the tooth structures, and each of the plurality of coils has two lead terminals, and the two lead terminals are connected to a power supply or serve as a neutral point in phase.
13. A concentrated winding electric machine comprising: the wound stator of claim 12, wherein the wound stator is mounted on the housing, the rotor is located in a central axial hole surrounded by a plurality of the tooth structures of the wound stator, and a gap is formed between the second structure segment of the tooth structure of the wound stator and the outer surface of the rotor.
14. A method of producing a wound stator, the wound stator being the wound stator of claim 12, comprising: preparing a die matched with the yoke structure sections, providing a first plate, and processing the first plate according to the die to respectively obtain a plurality of yoke structure sections;
and providing a second plate, and cutting the second plate according to the shape of the preset tooth structure to obtain a plurality of tooth structures.
15. The method of claim 14, wherein each of said tooth structures is mortise and tenon connected to a corresponding one of said yoke structure segments, said tooth structure and said yoke structure segment forming a "T" shape;
winding the tooth part structure in the T-shaped structure to form a plurality of coils;
and sequentially connecting the yoke structure sections in two adjacent T-shaped structures in the T-shaped structures end to form the annular yoke structure, wherein all the tooth parts are positioned on the same circumferential line.
16. The method of claim 15, wherein the tooth structure has two lead ends after winding is completed; dividing all the tooth structures into a u-phase group, a v-phase group and a w-phase group, and connecting coils of all the tooth structures in the u-phase group in parallel or in series, wherein the u-phase group integrally has two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point;
in analogy, after coils of the tooth structures in the v-phase group are connected in parallel or in series, the v-phase group integrally has two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point;
after coils of the tooth structures in the w-phase groups are connected in parallel or in series, the w-phase groups integrally have two lead terminals, one of the lead terminals is connected to a power supply, and the other lead terminal is used as a neutral point;
and connecting all the lead terminals as neutral points to serve as the neutral points of the concentrated winding motor.
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| CN201910728716.6A CN112350465A (en) | 2019-08-08 | 2019-08-08 | Stator core, wound stator, concentrated winding motor and production method |
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| CN201910728716.6A CN112350465A (en) | 2019-08-08 | 2019-08-08 | Stator core, wound stator, concentrated winding motor and production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112564327A (en) * | 2019-09-26 | 2021-03-26 | 安徽美芝精密制造有限公司 | Stator core, stator, motor, compressor and consumer |
| CN117997010A (en) * | 2023-12-28 | 2024-05-07 | 合普动力股份有限公司 | Heat transfer structure of concentrated winding flat wire stator and manufacturing method thereof |
| CN117997010B (en) * | 2023-12-28 | 2024-07-09 | 合普动力股份有限公司 | Heat transfer structure of concentrated winding flat wire stator and manufacturing method thereof |
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| CN104113170A (en) * | 2013-07-17 | 2014-10-22 | 广东威灵电机制造有限公司 | Motor and manufacturing method thereof |
| CN207150274U (en) * | 2017-07-13 | 2018-03-27 | 常州神力电机股份有限公司 | A kind of motor stator iron core punch sheet structure |
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| JP2005278238A (en) * | 2004-03-23 | 2005-10-06 | Ishikawajima Harima Heavy Ind Co Ltd | Stator core for motor |
| CN101330241A (en) * | 2007-06-18 | 2008-12-24 | 阿思科控股有限公司 | Two-phase synchronous electric motor with permanent magnets for mechanical priming washing pumps of dishwashers and similar washing machines |
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Application publication date: 20210209 |