CN113206561A - Stator and motor using same - Google Patents
Stator and motor using same Download PDFInfo
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- CN113206561A CN113206561A CN202110699587.XA CN202110699587A CN113206561A CN 113206561 A CN113206561 A CN 113206561A CN 202110699587 A CN202110699587 A CN 202110699587A CN 113206561 A CN113206561 A CN 113206561A
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- 210000003781 tooth socket Anatomy 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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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
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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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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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
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The application relates to a stator and a motor using the same. The stator includes stator core and twines the stator winding on stator core, and stator core includes: an annular stator yoke; the stator comprises a stator yoke, a plurality of stator teeth and a plurality of slots, wherein the stator teeth extend from the stator yoke in the radial direction, the stator teeth are uniformly distributed at intervals along the circumferential direction of the stator yoke, and the slots for accommodating wires of the stator winding are formed between adjacent stator teeth; wherein the plurality of stator teeth includes at least a first type of stator teeth having a first length and a second type of stator teeth having a second length, the second length being greater than the first length; the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a preset rule. According to the embodiment of the application, the sine of the magnetomotive force generated by the winding can be improved, the harmonic electromagnetic force is weakened, and the electromagnetic performance of the motor is improved.
Description
Technical Field
The application relates to the technical field of motors, in particular to a stator and a motor using the stator.
Background
When optimizing the electromagnetic force of an asynchronous machine, the stator is usually optimized. For example, in a related art, stator teeth are provided to have unequal tooth widths, and even if a part of the stator teeth of the stator has a larger width and a part of the stator teeth has a smaller width.
However, when the stator teeth have different tooth widths, the tooth space areas between adjacent stator teeth are different, the tooth space with a smaller area has the problem that the wire of the winding is difficult to be embedded, and the copper wire of the tooth space with a larger area having the winding is difficult to be fully embedded, so that the tooth space area is wasted, and the power density is reduced; in addition, the stator teeth with small width are easy to generate a magnetic saturation state, and the peak torque of the motor is reduced.
Disclosure of Invention
The application aims at providing a new stator and a motor using the same, and the sine of magnetomotive force generated by a winding can be improved, harmonic electromagnetic force is weakened, and the electromagnetic performance of the motor is improved.
The first aspect of the present application provides a stator, including stator core and twine in stator winding on the stator core, the stator core includes:
an annular stator yoke; and
a plurality of stator teeth extending radially from the stator yoke, the plurality of stator teeth being evenly spaced apart along a circumference of the stator yoke, adjacent stator teeth forming wire slots therebetween for receiving wires of the stator winding;
wherein the plurality of stator teeth includes at least a first type of stator teeth having a first length and a second type of stator teeth having a second length, the second length being greater than the first length;
the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a preset rule.
In one embodiment, the stator core has M × N stator teeth forming M slot groups along the circumferential direction, the slot groups including at least the first type of stator teeth and the second type of stator teeth, the slot groups including N of the wire slots; wherein M is greater than or equal to 2.
In one embodiment, the set of slots has a center tooth having a radial length less than a radial length of each other stator tooth in the same set of slots, wherein the center tooth is the first type of stator tooth and each other stator tooth in the same set of slots is the second type of stator tooth; or,
the radial length of the stator teeth between two adjacent wire slots of two adjacent slot groups is smaller than that of each stator tooth in the two adjacent slot groups, wherein the stator teeth between the two adjacent wire slots are the first type of stator teeth, and each stator tooth in the two adjacent slot groups is the second type of stator teeth; or,
the tooth socket group is provided with a central tooth, and the radial length of two stator teeth adjacent to the central tooth on two sides of the central tooth is greater than that of other stator teeth in the same tooth socket group, wherein the two stator teeth adjacent to the central tooth on two sides of the central tooth are the second type of stator teeth, and the other stator teeth in the same tooth socket group are the first type of stator teeth.
In one embodiment, the set of slots has a center tooth with a radial length less than the radial length of each other stator tooth in the same set of slots; and/or
The radial length of the stator teeth between two adjacent wire slots of two adjacent slot groups is smaller than that of each stator tooth in the two adjacent slot groups; and/or
The tooth groove group is provided with a central tooth, and the radial length of two adjacent stator teeth on two sides of the central tooth is greater than that of other stator teeth in the same tooth groove group.
In one embodiment, the plurality of stator teeth further includes a third type of stator tooth having a third length, the third length being greater than the second length;
the first type of stator teeth, the second type of stator teeth and the third type of stator teeth are alternately arranged along the circumferential direction according to a preset rule.
In one embodiment, the set of tooth slots has a center tooth and the set of tooth slots further includes a third type of stator teeth having a third length, the third length being greater than the second length;
two stator teeth adjacent to the central tooth on two sides of the central tooth in the tooth groove group are the third type of stator teeth;
the central teeth of the slot groups and/or the stator teeth between two adjacent slots of two adjacent slot groups are the first type of stator teeth;
and other stator teeth of the stator magnetic core are the second type of stator teeth.
In one embodiment, the stator winding spans P stator teeth, such that the stator winding spans two of the slot groups; wherein P is greater than or equal to N.
In one embodiment, for the stator winding, two adjacent stator teeth for forming their wire inlet slots and two adjacent stator teeth for forming their wire outlet slots have the same configuration.
In one embodiment, the wire slots of one of two adjacent tooth slot groups are winding wire inlet slots, and the wire slots of the other one of the two adjacent tooth slot groups are winding wire outlet slots.
In one embodiment, the plurality of stator teeth have the same tooth width.
In some embodiments of the present application, the stator core is provided with at least a first kind of stator teeth and a second kind of stator teeth with different lengths, and electromagnetic forces of different stator wire groups can be adjusted through the alternate distribution of the first kind of stator teeth and the second kind of stator teeth, so that the sine of magnetomotive force generated by the winding can be improved, harmonic electromagnetic force is weakened, and further the electromagnetic performance of the motor is improved.
A second aspect of the present application provides an electric machine comprising:
a rotor; and
a stator magnetically coupled to the rotor, the stator having the features of the stator described above.
A plurality of stator teeth of the stator and the rotor form uneven air gaps with unequal intervals.
In one embodiment, the non-uniform air gap has a pitch in the range of 0.2mm to 1.5 mm.
In some embodiments of the present application, a non-uniform air gap is formed between the stator and the rotor by providing the stator core with a first type of stator teeth and a second type of stator teeth having different lengths; and the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a predetermined rule, so that the nonuniformity of the air gap also has a predetermined rule. Therefore, the sine of the air-gap magnetic field can be improved, the sine of the winding magnetomotive force is improved, the harmonic magnetic field is reduced to weaken the electromagnetic force, the electromagnetic performance of the motor is improved, and the NVH (Noise, Vibration, Harshness Noise, Vibration and sound Vibration roughness) performance of the motor is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a schematic structural diagram of an electric machine according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a stator core according to an embodiment of the present application;
fig. 3 is an enlarged view of the structure of the stator core at a in fig. 1.
Reference numerals:
10-a motor; 100-a rotor; 300-air gap; 200-a stator core; 210-a stator yoke; 220-stator teeth; 201-wire grooves; 221-stator teeth of a first type; 222-stator teeth of a second type; 223-stator teeth of the third type.
Detailed Description
Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While embodiments of the present application are illustrated in the accompanying drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The application aims at providing a new stator and a motor using the same, and the sine of magnetomotive force generated by a winding can be improved, harmonic electromagnetic force is weakened, and the electromagnetic performance of the motor is improved.
According to an embodiment of the present application, a stator includes a stator core and a stator winding wound on the stator core, the stator core includes:
an annular stator yoke; and the number of the first and second groups,
a plurality of stator teeth extending radially from the stator yoke, the plurality of stator teeth being evenly spaced apart circumferentially of the stator yoke, a slot being formed between adjacent stator teeth for receiving a wire of the stator winding;
the plurality of stator teeth at least comprise a first type of stator teeth with a first length and a second type of stator teeth with a second length, and the second length is larger than the first length;
the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a preset rule.
It will be appreciated that the first length and the second length are dimensions of the stator teeth in the radial extension direction.
It is understood that the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a predetermined rule, including but not limited to the case where only the first type of stator teeth and the second type of stator teeth are arranged.
In the embodiment of the application, the stator magnetic core is at least provided with the first type of stator teeth and the second type of stator teeth with different lengths, the electromagnetic force of different stator wire groups can be adjusted through the alternate distribution of the first type of stator teeth and the second type of stator teeth, the sine of magnetomotive force generated by the winding can be improved, the harmonic electromagnetic force is weakened, and the electromagnetic performance of the motor is further improved.
In accordance with another embodiment of the present application, an electric machine includes:
a rotor; and
a stator magnetically coupled to the rotor, the stator having the features of the stator described in the previous embodiments;
a plurality of stator teeth of the stator and the rotor form uneven air gaps with unequal intervals.
In the embodiment of the application, the stator magnetic core is provided with the first type of stator teeth and the second type of stator teeth with different lengths, so that an uneven air gap is formed between the stator and the rotor; and the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a predetermined rule, so that the nonuniformity of the air gap also has a predetermined rule. Therefore, the sine of the air gap magnetic field can be improved, the sine of the winding magnetomotive force is improved, and the harmonic electromagnetic force is weakened, so that the electromagnetic performance of the motor is improved, and the NVH performance of the motor is improved.
Technical solutions of some embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present application; FIG. 2 is a schematic structural diagram of a stator core according to an embodiment of the present application; fig. 3 is an enlarged view of the stator core structure at a in fig. 1.
Referring to fig. 1 to 3, the motor 10 of the present embodiment includes a rotor 100 and a stator magnetically coupled to the rotor 100, wherein the stator includes a stator core 200 and a stator winding wound on the stator core 200.
In some embodiments, the motor is a 48-slot 4-pole single-layer winding asynchronous motor. It will be appreciated that the solution of the present application may also be applied to other suitable slot pole fitted machines, or to other suitable winding forms of machines, and is not limited to asynchronous machines.
The stator core 200 includes an annular stator yoke 210, and a plurality of stator teeth 220 extending radially from the stator yoke 210, the plurality of stator teeth 220 being uniformly spaced apart along a circumferential direction of the stator yoke 210, and a slot 201 for receiving a wire of a stator winding is formed between adjacent stator teeth 220.
In some embodiments, the stator yoke 210 has a circular shape, but the present application is not limited thereto, and the stator yoke may have a substantially square ring shape or a substantially circular ring shape, for example. A plurality of stator teeth 220 extend radially inward from stator yoke 210; the plurality of stator teeth 220 includes at least a first type of stator teeth having a first length and a second type of stator teeth having a second length, the second length being greater than the first length; the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a preset rule.
In this embodiment, since the tooth lengths of the plurality of stator teeth are not completely equal, the plurality of stator teeth and the rotor 100 form an uneven air gap 300 with unequal intervals therebetween. In some embodiments, the non-uniform air gaps 300 may have a pitch in the range of 0.2mm to 1.5 mm. More specifically, the non-uniform air gaps 300 may have a pitch ranging from 0.2mm to 1.0mm, from 0.4mm to 1.3mm, or from 0.6mm to 1.5 mm.
In some embodiments, the stator core 200 has M × N stator teeth 220, the M × N stator teeth 220 forming M slot groups in the circumferential direction, the slot groups including N slots 201; wherein M is greater than or equal to 2.
Further, in some embodiments, the stator winding spans P stator teeth, where P is greater than or equal to N, such that the stator winding spans two slot groups.
In some embodiments, for a stator winding, two adjacent stator teeth for forming their wire inlet slots and two adjacent stator teeth for forming their wire outlet slots have the same configuration. For example, two adjacent stator teeth forming the wire inlet groove and two adjacent stator teeth forming the wire outlet groove are the same type of stator teeth, or two adjacent stator teeth forming the wire inlet groove are respectively a first type of stator teeth and a second type of stator teeth, and two adjacent stator teeth forming the wire outlet groove are also respectively a first type of stator teeth and a second type of stator teeth. The configuration can ensure that the wire inlet groove and the wire outlet groove of the stator winding have the same wire capacity, thereby reducing or avoiding the waste of the area of the wire grooves.
Referring also to fig. 2, in the embodiment shown in fig. 2, M is 12 and N is 4, i.e., the stator core 200 has 12 slot groups, i.e., shown as arcs + U +, -W-, etc., the slot groups include 4 slots; the stator is provided with a multi-phase winding, the phase winding comprises two tooth groove groups, namely an inlet wire groove group and an outlet wire groove group of the phase winding, namely N wire grooves of one of the two tooth groove groups are winding inlet wire grooves, and N wire grooves of the other one of the two tooth groove groups are winding outlet wire grooves. For example, in fig. 2, taking a U-phase winding as an example, the stator winding spans 12 teeth, the slot group shown by + U + is an inlet slot group of the U-phase winding, that is, 4 slots of the slot group are all inlet slots of the U-phase winding, and the slot group shown by-U-is an outlet slot group of the U-phase winding, that is, 4 slots of the slot group are all outlet slots of the U-phase winding. Further, the formation of a stator winding is illustrated by taking one of the U-phase windings as an example; for example, the wire of the winding is led in from a wire slot S1-2, and is led out from a wire slot S13-14 after being wound for a plurality of turns between the wire slot S1-2 and a wire slot S13-14, wherein S1-2 represents the wire slot between the teeth 1 and 2, and S13-14 represents the wire slot between the teeth 13 and 14.
More specifically, referring to fig. 2, in this specific example, two adjacent slot groups correspond to different phase windings, and 4 slots of one of the two slot groups are winding inlet slots, and 4 slots of the other are winding outlet slots.
Further, in some embodiments, the groups of slots comprise at least a first type of stator teeth 221 and a second type of stator teeth 222 that are different in length, thereby allowing the first type of stator teeth 221 and the second type of stator teeth 222 to repeat in each group of slots. The following description is made by way of several specific examples.
In a particular embodiment, the set of slots has a center tooth with a radial length that is less than the radial length of each of the other stator teeth 220 in the same slot set and the radial length of each of the other stator teeth is equal, i.e., the center tooth is a shorter first type of stator tooth 221 and each of the other stator teeth 220 in the same slot set is a longer second type of stator tooth 222. With such a configuration, the air gap between the stator and the rotor at the center tooth of the slot group is widened. It will be appreciated that in other embodiments, the lengths of the other stator teeth than the first type of stator teeth may not be equal.
Taking fig. 2 as an example, the teeth 3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 43 and 47 are central teeth of each slot group and are stator teeth of the first type, and the other teeth of the stator core are stator teeth of the second type.
In another embodiment the radial length of the stator teeth 220 between two adjacent slot groups 201 is smaller than the radial length of each stator tooth 220 in two adjacent slot groups, and the radial length of each stator tooth 220 in two adjacent slot groups is equal, i.e. the stator teeth between two adjacent slot groups 201 are stator teeth 221 of the first type and each stator tooth 220 in two adjacent slot groups are stator teeth 222 of the second type. By such a configuration, the air gap between the stator and the rotor at two adjacent groups of slots is widened. It will be appreciated that in other embodiments, the lengths of the other stator teeth than the first type of stator teeth may not be equal.
Taking fig. 2 as an example, the tooth 1, the tooth 5, the tooth 9, the tooth 13, the tooth 17, the tooth 21, the tooth 25, the tooth 29, the tooth 33, the tooth 37, the tooth 41 and the tooth 45 are stator teeth 220 between two adjacent slots 201 of two adjacent slot groups, and are stator teeth of a first type, and other teeth of the stator core are stator teeth of a second type.
In another specific embodiment, the set of tooth slots has a central tooth, and two stator teeth 220 adjacent to the central tooth on either side of the central tooth have a radial length greater than the radial length of each other stator tooth 220 in the same set of tooth slots, and each other stator tooth 220 has an equal radial length, i.e., two stator teeth 220 adjacent to the central tooth on either side of the central tooth are stator teeth 221 of the second type and each other stator tooth 220 in the same set of tooth slots are stator teeth 222 of the first type. By such a configuration, the air gap between the set of slots and the rotor is made wider at the central tooth and narrows and widens again on either side of the central tooth. It will be appreciated that in other embodiments, the lengths of the other stator teeth than the second type of stator teeth may not be equal.
Taking fig. 2 as an example, each of the teeth 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, and 48 is a first type of stator tooth, and the other teeth of the stator core are a second type of stator tooth.
It is to be understood that the above embodiments may be implemented alone or in combination with each other; for example, the central tooth of a slot group and the stator teeth 220 between two adjacent slots 201 of two adjacent slot groups may be provided as a shorter stator tooth of the first type 221, while the other teeth of the stator core may be provided as longer stator teeth of the second type 222.
In some embodiments, referring to FIG. 3, plurality of stator teeth 220 further includes a third type of stator teeth 223 having a third length, the third length being greater than the second length; that is, the lengths of the first type stator teeth 221, the second type stator teeth 222, and the third type stator teeth 223 increase in order. The first type stator teeth 221, the second type stator teeth 222 and the third type stator teeth 223 may be alternately arranged along the circumferential direction according to a predetermined rule.
It will be appreciated that, as the second type of stator teeth 222 are referred to as normal teeth, the first type of stator teeth 221 may also be referred to as shortened teeth, and the third type of stator teeth 223 may also be referred to as lengthened teeth. The increased teeth have a longer radial length relative to the normal teeth, the normal teeth have a longer radial length relative to the shortened teeth, the increased teeth have a smaller gap 300 with the rotor 100 relative to the normal teeth, and the shortened teeth have a larger gap 300 with the rotor 100 relative to the shortened teeth. In this way, the first type stator teeth 221, the second type stator teeth 222 and the third type stator teeth 223 are alternately arranged along the circumferential direction of the stator yoke 210 according to a predetermined rule. It will be appreciated that stator teeth 220 having other radial lengths may be provided in addition to stator teeth 221, 222 and 223 of different radial lengths.
In a specific embodiment, the set of tooth slots has a central tooth, the central tooth of the set of tooth slots is configured as a shortened tooth 221, two stator teeth 220 adjacent to the central tooth on either side of the central tooth are configured as lengthened teeth 223, the stator teeth 220 between two adjacent wire slots 201 of two adjacent sets of tooth slots are configured as shortened teeth 221, and the other stator teeth 220 of the stator core are configured as normal teeth 222.
The third type of stator teeth 223 are arranged on two adjacent sides of the central teeth of the slot group, the central teeth of the slot group are set as the first type of stator teeth 221, and the other stator teeth 220 in the slot group are set as the second type of stator teeth 222, so that the distance between the air gaps 300 is increased and then decreased from two sides of the slot group to the center direction, and further, the distance between the stator teeth 220 and the air gaps 300 of the rotor 100 has large drop change. In order to increase the variation law of the air gap 300 distance between each slot group and the rotor 100, the stator teeth 220 between two adjacent slots 201 of two adjacent slot groups are stator teeth 221 of a first type.
It is understood that other combinations of the three types of stator teeth of the stator core may be used. For example, in other embodiments, only the central tooth of a slot group or the stator teeth between two adjacent slots 201 of two adjacent slot groups may also be configured as shortened teeth.
In some embodiments, the tooth widths of the plurality of stator teeth 220 are the same. Compared with the prior art which adopts different tooth widths, the tooth widths of the plurality of stator teeth 220 are the same, and the plurality of stator teeth 220 are uniformly distributed at intervals along the circumferential direction of the stator magnet yoke 210, so that the widths of the slots 201 between the adjacent stator teeth 220 are the same, and the wires of the stator winding can be more easily embedded into the slots 201; on the other hand, the two adjacent stator teeth for forming the wire inlet groove and the two adjacent stator teeth for forming the wire outlet groove are configured to have the same configuration, so that the wire inlet groove and the wire outlet groove of the stator winding can have the same wire capacity, the area of the wire groove 201 can be reduced or avoided from being wasted, the area utilization rate of the wire groove 201 is improved, and the power density of the motor is improved; in addition, because the tooth widths of the stator teeth 220 are the same, the problem that the stator teeth with smaller widths are easy to generate a magnetic saturation state is avoided, and the peak torque of the motor is effectively improved.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (12)
1. A stator comprising a stator core and a stator winding wound on the stator core, the stator core comprising:
an annular stator yoke; and
a plurality of stator teeth extending radially from the stator yoke, the plurality of stator teeth being evenly spaced apart along a circumference of the stator yoke, adjacent stator teeth forming wire slots therebetween for receiving wires of the stator winding;
wherein the plurality of stator teeth includes at least a first type of stator teeth having a first length and a second type of stator teeth having a second length, the second length being greater than the first length;
the first type of stator teeth and the second type of stator teeth are alternately arranged along the circumferential direction according to a preset rule.
2. The stator of claim 1, wherein:
the stator core is provided with M × N stator teeth, the M × N stator teeth form M tooth groove groups along the circumferential direction, the tooth groove groups at least comprise the first type of stator teeth and the second type of stator teeth, and the tooth groove groups comprise N wire grooves; wherein M is greater than or equal to 2.
3. The stator of claim 2, wherein:
the tooth groove group is provided with a central tooth, and the radial length of the central tooth is smaller than that of each other stator tooth in the same tooth groove group, wherein the central tooth is the first type of stator tooth, and each other stator tooth in the same tooth groove group is the second type of stator tooth; or,
the radial length of the stator teeth between two adjacent wire slots of two adjacent slot groups is smaller than that of each stator tooth in the two adjacent slot groups, wherein the stator teeth between the two adjacent wire slots are the first type of stator teeth, and each stator tooth in the two adjacent slot groups is the second type of stator teeth; or,
the tooth socket group is provided with a central tooth, and the radial length of two stator teeth adjacent to the central tooth on two sides of the central tooth is greater than that of other stator teeth in the same tooth socket group, wherein the two stator teeth adjacent to the central tooth on two sides of the central tooth are the second type of stator teeth, and the other stator teeth in the same tooth socket group are the first type of stator teeth.
4. The stator of claim 2, wherein:
the tooth groove group is provided with a central tooth, and the radial length of the central tooth is smaller than that of each other stator tooth in the same tooth groove group; and/or
The radial length of the stator teeth between two adjacent wire slots of two adjacent slot groups is smaller than that of each stator tooth in the two adjacent slot groups; and/or
The tooth groove group is provided with a central tooth, and the radial length of two adjacent stator teeth on two sides of the central tooth is greater than that of other stator teeth in the same tooth groove group.
5. The stator of claim 1, wherein:
the plurality of stator teeth further comprises a third type of stator teeth having a third length, the third length being greater than the second length;
the first type of stator teeth, the second type of stator teeth and the third type of stator teeth are alternately arranged along the circumferential direction according to a preset rule.
6. The stator of claim 2, wherein:
the set of tooth slots has a center tooth and the set of tooth slots further includes a third type of stator tooth having a third length, the third length being greater than the second length;
two stator teeth adjacent to the central tooth on two sides of the central tooth in the tooth groove group are the third type of stator teeth;
the central teeth of the slot groups and/or the stator teeth between two adjacent slots of two adjacent slot groups are the first type of stator teeth;
and other stator teeth of the stator magnetic core are the second type of stator teeth.
7. The stator according to any one of claims 2 to 6, wherein:
the stator winding spans P stator teeth, so that the stator winding spans two tooth groove groups, wherein P is larger than or equal to N.
8. The stator of claim 7, wherein:
for the stator winding, two adjacent stator teeth for forming the wire inlet slots thereof and two adjacent stator teeth for forming the wire outlet slots thereof have the same configuration.
9. A stator according to claim 7, wherein the slots of one of two adjacent slot groups are winding inlet slots and the slots of the other are winding outlet slots.
10. The stator according to any one of claims 2 to 6, wherein:
the tooth widths of the plurality of stator teeth are the same.
11. An electric machine, comprising:
a rotor; and
a stator magnetically coupled to the rotor, the stator having the features of the stator of any one of claims 1 to 10;
a plurality of stator teeth of the stator and the rotor form uneven air gaps with unequal intervals.
12. The electrical machine of claim 11, wherein the non-uniform air gap has a pitch in the range of 0.2mm to 1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699587.XA CN113206561A (en) | 2021-06-23 | 2021-06-23 | Stator and motor using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699587.XA CN113206561A (en) | 2021-06-23 | 2021-06-23 | Stator and motor using same |
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| CN113206561A true CN113206561A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110699587.XA Pending CN113206561A (en) | 2021-06-23 | 2021-06-23 | Stator and motor using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113206561A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024208469A1 (en) * | 2023-04-06 | 2024-10-10 | Dr. Fritz Faulhaber Gmbh & Co. Kg | Motor with a defined detent torque |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101326697A (en) * | 2005-12-09 | 2008-12-17 | 丰田自动车株式会社 | Rotating electrical machines |
| CN102780286A (en) * | 2011-05-09 | 2012-11-14 | 通用汽车环球科技运作有限责任公司 | Asymmetric stator teeth in an electric motor |
| CN105186816A (en) * | 2015-07-16 | 2015-12-23 | 博格思众（常州）电机电器有限公司 | Stator and rotor combined structure |
| CN205178671U (en) * | 2015-06-25 | 2016-04-20 | 顾明 | Stator and corresponding brushless direct current, three -phase switch magnetic resistance and shaded pole motor thereof |
-
2021
- 2021-06-23 CN CN202110699587.XA patent/CN113206561A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101326697A (en) * | 2005-12-09 | 2008-12-17 | 丰田自动车株式会社 | Rotating electrical machines |
| CN102780286A (en) * | 2011-05-09 | 2012-11-14 | 通用汽车环球科技运作有限责任公司 | Asymmetric stator teeth in an electric motor |
| CN205178671U (en) * | 2015-06-25 | 2016-04-20 | 顾明 | Stator and corresponding brushless direct current, three -phase switch magnetic resistance and shaded pole motor thereof |
| CN105186816A (en) * | 2015-07-16 | 2015-12-23 | 博格思众（常州）电机电器有限公司 | Stator and rotor combined structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024208469A1 (en) * | 2023-04-06 | 2024-10-10 | Dr. Fritz Faulhaber Gmbh & Co. Kg | Motor with a defined detent torque |
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Application publication date: 20210803 |