CN114726137A - Flat wire winding structure and stator and motor comprising same - Google Patents
Flat wire winding structure and stator and motor comprising same Download PDFInfo
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- CN114726137A CN114726137A CN202110011923.7A CN202110011923A CN114726137A CN 114726137 A CN114726137 A CN 114726137A CN 202110011923 A CN202110011923 A CN 202110011923A CN 114726137 A CN114726137 A CN 114726137A
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- 238000004804 winding Methods 0.000 title claims abstract description 213
- 239000004020 conductor Substances 0.000 claims abstract description 85
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 94
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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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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- 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
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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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a flat wire winding structure, a stator comprising the same and a motor, wherein the flat wire winding structure is arranged in a stator core, a tooth part of the stator core is provided with a plurality of wire slots, each wire slot is provided with a plurality of radially arranged and even installation positions for accommodating pins of a plurality of flat wire coil conductors, the flat wire winding structure comprises a first phase winding, a second phase winding and a third phase winding, each phase winding comprises four parallel branches, and the first phase winding, the second phase winding and the third phase winding are of a double-layer winding structure; in one circle of winding of the stator core, each parallel branch is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot, and two different parallel branches of the same phase winding are overlapped in the wire slots to form the double-layer winding structure. The motor has better torque output performance and higher power factor.
Description
Technical Field
The invention relates to the field of motors in electric automobiles, in particular to a flat wire winding structure, a stator comprising the same and a motor.
Background
With the development of electric automobile technology, the operating performance of the driving motor is required to be higher and higher. As a key part of an electric automobile, the output performance of a driving motor directly influences the efficient operation of the whole machine.
Compared with a traditional round wire motor, the conventional flat wire motor has the advantages of high slot filling rate, good temperature performance and wide high-efficiency area, a winding of the conventional flat wire motor is generally formed by connecting a plurality of square conductors in a welding mode, the number of the square conductors in a motor stator core slot is generally 2, 4 or 8, and the number of parallel branches is generally 1 or 2.
In the winding structure of the four-way parallel type flat wire motor in the prior art, under a certain direct current bus voltage platform, the number of conductors in each slot of a stator core is increased to reduce the high-speed skin effect of the conductors, improve the temperature rise performance of the flat wire motor under the high-speed working condition, widen the selection space of the number of turns of the winding and the number of parallel branches in the design stage of the motor scheme, and be favorable for optimizing the motor design scheme so as to better meet the requirements of the motor performance and the temperature rise. However, the winding structure of the type is in single-layer arrangement, the height of the end part of the motor winding is high, the copper consumption is relatively high, and the high-performance requirement of the existing electric automobile on the driving motor is not met.
Therefore, a double-layer flat wire winding structure is needed, so that the motor has better torque output performance and higher power factor.
Disclosure of Invention
The invention provides a flat wire winding structure, a stator comprising the same and a motor, which are used for solving the problems of low torque output performance and low power factor of the conventional flat wire winding motor.
In order to solve the above technical problem, a first aspect of the present invention provides a flat wire winding structure, which is disposed in a stator core, wherein a tooth portion of the stator core is provided with a plurality of slots, each slot is provided with a plurality of radially arranged and even-numbered mounting positions for accommodating pins of a plurality of flat wire coil conductors, and the flat wire winding structure is characterized in that: the flat wire winding structure comprises a first phase winding, a second phase winding and a third phase winding, each phase winding comprises four parallel branches, and the first phase winding, the second phase winding and the third phase winding are all double-layer winding structures; in one circle of winding of the stator core, each parallel branch is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot, and two different parallel branches of the same phase winding are overlapped in the wire slots to form the double-layer winding structure.
Preferably, each parallel branch of the first phase winding, the second phase winding and the third phase winding is formed by alternately connecting flat wire coil conductors with spans of 6 wire slots or 7 wire slots, so as to avoid circulating current generated among different parallel branches.
Preferably, each of the parallel branches has n turns around the stator core, wherein: when n is an even number, 1 st to 1 st of each parallel branch
And
n circles are led in from the upper layer of one wire groove and led out from the lower layer of the other wire groove across 6 wire grooves; the first of each parallel branch
To
The ring is led in from the upper layer of one wire groove and led out from the lower layer of the other wire groove across 7 wire grooves; when n is odd number, 1 st to 1 st of each parallel branch
And
n circles are led in from the upper layer of one wire groove and led out from the lower layer of the other wire groove across 6 wire grooves; the first of each parallel branch
To
Or
To
And the ring is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot across 7 wire slots.
Preferably, each of the trunking is provided with 12 installation positions for accommodating the flat wire coil conductor, and the flat wire coil conductors passing through the 12 installation positions of each trunking respectively belong to at least two parallel branches.
A second aspect of the invention provides a stator including a stator core and the flat wire winding structure described above; one axial end of the stator core is a winding hairpin end, and the other axial end of the stator core is a winding welding end; the flat wire winding structure is arranged in the stator iron core provided with a plurality of wire slots, and the flat wire coil conductor is inserted into the wire slots to complete the arrangement of the flat wire winding structure.
Preferably, the first phase winding, the second phase winding and the third phase winding respectively include a first parallel branch, a second parallel branch, a third parallel branch and a fourth parallel branch, and the relative positions of the outgoing line of the three-phase winding and the star point line are as follows: the input lead ends of the parallel branches of the first phase winding, the second phase winding and the third phase winding are arranged at the winding card sending end in sequence as a first parallel branch of the first phase winding, a second parallel branch of the first phase winding, a first parallel branch of the second phase winding, a second parallel branch of the second phase winding, a first parallel branch of the third phase winding, a second parallel branch of the third phase winding, a third parallel branch of the first phase winding, a fourth parallel branch of the first phase winding, a third parallel branch of the second phase winding, a fourth parallel branch of the second phase winding, a third parallel branch of the third phase winding and a fourth parallel branch of the third phase winding.
Preferably, the outlet ends of the first phase winding, the second phase winding and the third phase winding are connected through a busbar.
Preferably, each of the slots contains an even number of 10 or more than 10 flat wire coil conductors.
Preferably, the number of the wire slots of the stator core is 48.
A third aspect of the invention provides a flat wire motor comprising a stator as described above and a rotor coaxially disposed within the stator.
In the flat wire winding structure, the three-phase winding is a double-layer winding structure, and compared with a single-layer winding structure of the existing motor, the slot filling rate is higher, so that the motor has lower copper consumption, and the motor can have better torque output performance and higher power factor at low speed; and the flat wire winding adopts a double-layer winding structure, so that the end part of the motor becomes low and the copper consumption is reduced, and the integral efficiency interval of the motor is improved.
Drawings
FIG. 1 is a schematic 3D assembly forward view of a flat wire winding configuration in an embodiment of the invention;
FIG. 2 is a 3D assembled axial schematic of a flat wire winding configuration in an embodiment of the invention;
FIG. 3 is a routing diagram of one of the parallel branches in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a single-phase winding layout trace structure according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a portion of a winding in an embodiment of the invention.
In the figure, the position of the upper end of the main shaft,
1. stator core, 2, flat wire coil conductor.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but the information should not be limited to these terms, and 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 invention. It should be noted that the drawings of the present embodiment are only schematic system drawings, and do not represent all the components of the present invention, and the core principle of the present embodiment is the same as that of the present embodiment by adding components to the present system.
With reference to fig. 1 and fig. 2, an embodiment of the present invention provides a flat wire winding structure, which is disposed in a stator core 1, wherein a tooth portion of the stator core 1 is provided with a plurality of wire slots, and each wire slot is provided with a plurality of radially arranged mounting positions for accommodating pins of a plurality of flat wire coil conductors 2; the flat wire winding structure comprises a first phase winding, a second phase winding and a third phase winding, each phase winding comprises four parallel branches, and the first phase winding, the second phase winding and the third phase winding are all double-layer winding structures; in one circle of winding of the stator core, each parallel branch is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot, and two different parallel branches of the same phase winding are overlapped in the wire slots to form the double-layer winding structure.
For convenience of description, the installation positions in the wire grooves are sorted in an ascending order according to the direction close to the circle center of the stator core and are marked as a 1 st layer, a 2 nd layer, a 3 rd layer and a 4 th layer … …; the wire slots are labeled as 1 st wire slot, 2 nd wire slot, 3 rd wire slot, 4 th wire slot … … in circumferential order. The double-layer winding structure refers to a double-layer winding structure formed by overlapping two different parallel branches of the same phase winding in a wire slot.
For example, two parallel branches passing through the 1 st layer and the 2 nd layer of the 1 st slot are mutually overlapped in the winding structure, specifically, a flat wire coil conductor passing through the 1 st layer in the 1 st slot is connected to a flat wire coil conductor of the 2 nd layer in the M-th (M is not equal to 1) slot, and a flat wire coil conductor passing through the 2 nd layer in the 1 st slot is connected to a flat wire coil conductor of the 1 st layer in the M-th slot; and then the flat wire coil conductor passing through the 2 nd layer in the M-th wire slot is connected to the flat wire coil conductor of the 1 st layer in the L-th wire slot (L is not equal to M), and the flat wire coil conductor passing through the 1 st layer in the M-th wire slot is connected to the flat wire coil conductor … … of the 2 nd layer in the L-th wire slot and sequentially connected according to the sequence and the rule until the 1 st layer and the 2 nd layer of all slot positions on the stator core are finished. The connection mode of the flat wire coil conductor of the 3 rd layer and the flat wire coil conductor of the 4 th layer in the same slot is the same as that of the flat wire coil conductor of the 1 st layer and the flat wire coil conductor of the 2 nd layer, the connection mode of the flat wire coil conductor of the 5 th layer and the flat wire coil conductor of the 6 th layer in the same slot is the same as that of the flat wire coil conductor of the 1 st layer and the flat wire coil conductor of the 2 nd layer, and the like.
It is worth noting that when the flat wire coil conductor on the 2 nd layer runs for nearly one circle in the circumferential sequence, the flat wire coil conductor on the 2 nd layer is connected with the flat wire coil conductor on the 3 rd layer in the next wire slot to be connected; when the flat wire coil conductor of the 4 th layer runs for nearly one circle in the circumferential sequence, the flat wire coil conductor of the 4 th layer is connected with the flat wire coil conductor of the 5 th layer in the next wire slot to be connected; when the flat wire coil conductor of the 6 th layer goes through nearly one circle according to the circumferential sequence, the flat wire coil conductor of the 6 th layer is connected with the flat wire coil conductor of the 7 th layer in the next wire slot to be connected; and so on later to ensure that a complete circuit loop is formed.
In addition, the above-described flat wire coil conductors are all hairpin coils, which have one bent portion and two pins. During the connection, all the flat wire coil conductors are inserted from one end of the stator core, with the two prongs of each flat wire coil conductor inserted into mounting locations in the two wire slots into which they are to be inserted. Two flat wire coil conductors that need interconnect are bent interconnect through inserting foot, and for example the second is inserted into the first flat wire coil conductor on 7 th wire casing 2 nd layer and is inserted into the second flat wire coil conductor on 13 th wire casing 1 st layer with first inserting foot's connected mode and is: the second pin of the first flat wire coil conductor and the first pin of the second flat wire coil conductor are respectively bent and abutted and are connected through welding so as to ensure that a complete circuit loop is formed.
In the flat wire winding structure provided by the first aspect of the embodiment of the invention, as the three-phase windings are both of a double-layer winding structure, compared with a single-layer winding structure of the existing motor, the slot filling rate of the flat wire winding structure is higher, so that the motor has lower copper consumption, and the motor can have better torque output performance and higher power factor at low speed; and the flat wire winding adopts a double-layer flat wire winding structure, so that the end part of the motor becomes low and the copper consumption is reduced, and the integral efficiency interval of the motor is improved.
Furthermore, each parallel branch of the first phase winding, the second phase winding and the third phase winding is formed by alternately connecting flat wire coil conductors with spans of 6 wire grooves or 7 wire grooves, so that circulating current is prevented from being generated between different parallel branches, namely, the 1 st wire groove and the M wire groove are different by 6 wire grooves or 7 wire grooves, the M wire groove and the L wire groove are different by 6 wire grooves or 7 wire grooves, and the number of specific wire grooves can be determined according to actual slot positions and connection conditions.
Specifically, the installation positions in the slots are sorted in an ascending order in the direction close to the circle center of the stator core, the flat wire coil conductors passing through the middle ordinal number carry out wire crossing in a mode of 7 slot spans, and the flat wire coil conductors passing through the rest ordinal numbers carry out wire crossing in a mode of 6 slot spans;
specifically, if it is assumed that each parallel branch has n turns around the stator core, then:
when n is an even number, 1 st to 1 st of the parallel branches
And
n circles are led in from the upper layer of one wire groove and led out from the lower layer of the other wire groove across 6 wire grooves; first of parallel branches
To is that
The ring is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot across 7 wire slots;
when n is an odd number, 1 st to 1 st of the parallel branches
And
n circles are led in from the upper layer of one wire groove and led out from the lower layer of the other wire groove across 6 wire grooves; first of parallel branch
To
Or
To
And the ring is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot across 7 wire slots.
That is, if each trunking has 12 installation positions, the flat wire coil conductor (connected from the trunking with the highest trunking number to the trunking with the lowest trunking number) passing through the 6 th layer of a trunking and the 7 th layer of the next trunking to be connected needs to cross over 7 trunking for connection, and the other cases are connected according to the crossing over 6 trunking. Similarly, if each trunking has 10 installation positions, the flat wire coil conductor (connected from the trunking with the higher trunking number to the trunking with the lower trunking number) passing through the 5 th layer of a trunking and the 6 th layer of the next trunking to be connected needs to cross 7 trunking for connection, and the other cases are connected according to the crossing of 6 trunking. Preferably, when the stator core is provided with 48 slots, since the flat wire winding structure has a total of three-phase windings, and each winding has a total of 4 parallel branches, the manner of spanning 7 slots appears 4 times in each phase of winding, and the three-phase winding appears 12 times in total.
It should be noted that each wire slot is provided with 12 installation positions for accommodating the flat wire coil conductor, and the flat wire coil conductors passing through the 12 installation positions respectively belong to at least two parallel branches.
A stator provided in a second aspect of the embodiment of the present invention includes a stator core 1 and the above-described flat wire winding structure; one axial end of the stator core 1 is a winding hairpin end, and the other axial end is a winding welding end; the flat wire winding structure is arranged in a stator core 1 provided with a plurality of slots, and a flat wire coil conductor is inserted into the slots to complete the arrangement of the flat wire winding structure.
Further, in connection with fig. 5. The first phase winding, the second phase winding and the third phase winding are distributed uniformly and comprise a first parallel branch, a second parallel branch, a third parallel branch and a fourth parallel branch, and the relative positions of the outgoing line of the three-phase winding and the star point line are as follows: the input lead ends of the parallel branches of the first phase winding, the second phase winding and the third phase winding are sequentially arranged at the winding hairpin end as a first parallel branch of the first phase winding, a second parallel branch of the first phase winding, a first parallel branch of the second phase winding, a second parallel branch of the second phase winding, a first parallel branch of the third phase winding, a second parallel branch of the third phase winding, a third parallel branch of the first phase winding, a fourth parallel branch of the first phase winding, a third parallel branch of the second phase winding, a fourth parallel branch of the second phase winding, a third parallel branch of the third phase winding and a fourth parallel branch of the third phase winding.
It should be noted that the above winding structure distribution is one of the preferred embodiments of the present invention, and other similar winding structures improved according to the preferred embodiment are modified, for example, sequentially to a first parallel branch of a first phase winding, a second parallel branch of the first winding, a third parallel branch of a third phase winding, a fourth parallel branch of the third phase winding, a first parallel branch of a second phase winding, a second parallel branch of the second phase winding, a third parallel branch of the first phase winding, a fourth parallel branch of the first phase winding, a first parallel branch of the third phase winding, a second parallel branch of the third phase winding, a third parallel branch of the second phase winding, and a fourth parallel branch of the second phase winding;
or sequentially modifying a first parallel branch, a second parallel branch, a third parallel branch and a fourth parallel branch of the first phase winding; a first parallel branch, a second parallel branch, a third parallel branch and a fourth parallel branch of the third phase winding; and the connection mode of the first parallel branch, the second parallel branch, the third parallel branch and the fourth parallel branch of the second phase winding is similar to the idea of the embodiment of the invention, and thus the invention also belongs to the protection scope of the invention.
Furthermore, the outlet end of the three-phase winding is output by welding a busbar or a busbar injection molding piece, and the three-phase winding has better assembly feasibility.
Further, each wireway can accommodate 10 or an even number of more than 10 flat wire coil conductors, with the preferred embodiment being 12.
Further, the number of the wire slots of the stator core is 48.
The structure composition of the specific embodiment of the present invention will be described below by taking as an example a stator in which the number of slots is 48, each slot is provided with 12 mounting positions, and the number of each parallel branch is 4. Similarly, for convenience of description, the installation positions in the slots are sorted in an ascending order in the direction close to the center of the stator core and are marked as the 1 st layer, the 2 nd layer … …, the 11 th layer and the 12 th layer; the wire grooves are marked as a 1 st wire groove, a 2 nd wire groove … …, a 47 th wire groove and a 48 th wire groove in the circumferential sequence; also to distinguish the different flat wire coil conductors, each of the flat wire coil conductors is labeled #1, #2, #3, #4 … …
The connection of one of the parallel branches is specifically described with reference to fig. 3 and 4: the parallel branch starts from the 1 st layer of the 1 st slot, the first pin of the #1 flat wire coil conductor is inserted into the 1 st layer of the 1 st slot, and the second pin is inserted into the 2 nd layer of the 7 th slot; then, the first pin of the #2 flat wire coil conductor is inserted into the 1 st layer of the 13 th slot, the second pin is inserted into the 2 nd layer of the 19 th slot, and the second pin of the #1 flat wire coil conductor and the first pin of the #2 flat wire coil conductor are mutually welded through bending pins on the other end surface of the stator core; then, the first pin of the #3 flat wire coil conductor is inserted into the 1 st layer of the 25 th slot, the second pin is inserted into the 2 nd layer of the 31 st slot, and the second pin of the #2 flat wire coil conductor and the first pin of the #3 flat wire coil conductor are mutually welded through bending pins on the other end surface of the stator core; then, the first pin of the #4 flat wire coil conductor is inserted into the 1 st layer of the 37 th slot, the second pin is inserted into the 2 nd layer of the 43 rd slot, the second pin of the #3 flat wire coil conductor and the first pin of the #4 flat wire coil conductor are mutually welded … … by bending the pins at the other end face of the stator core, after the #4 flat wire coil conductor passes through the 2 nd layer of the 43 rd slot, because the number of the residual slots can not provide the slots connected according to the connection mode, the first pin of the #5 flat wire coil conductor is inserted into the 3 rd layer of the 1 st slot, the second pin is inserted into the 4 th layer of the 7 th slot, the second pin of the #4 flat wire coil conductor and the first pin of the #5 flat wire coil conductor are connected in the other end face of the stator core through the connection mode of bending the pins and mutually welding … …, and the connection mode of double-layer lap winding is adopted by analogy.
Particularly, after the first pin of the # N flat wire coil conductor is inserted into the 5 th layer of the 37 th slot and the second pin is inserted into the 6 th layer of the 43 th slot, the first pin of the # N +1 flat wire coil conductor needs to be inserted into the 7 th layer of the 2 nd slot and the second pin is inserted into the 8 th layer of the 8 th slot, and the second pin of the # N flat wire coil conductor and the first pin of the # N +1 flat wire coil conductor are mutually welded through bending the pins at the other end surface of the stator core; that is, the difference between the slot where the second pin of the # N flat wire coil conductor is located and the slot where the first pin of the # N +1 flat wire coil conductor is located is 7 wire slot positions instead of 6 wire slot positions. This arrangement is advantageous for avoiding circulating currents between different parallel branches.
Then, the subsequent connection is similar to the connection rule described above, and is completed by adopting a mode of 6 line slot positions in span until the connection to the 12 th layer of the 44 th line slot. From the above, it is clear that the wiring leads of the parallel branches are at the 1 st layer of the 1 st slot and the 12 th layer of the 44 th slot.
The connection mode of one parallel branch of a certain phase winding and the connection modes of other parallel branches of the phase winding or the parallel branches of other phase windings are similar to the connection modes, and the difference is that the connection installation position and the connection lead-out position are different.
A motor provided by the third aspect of the embodiments of the present invention includes the stator as described above and a rotor, and the rotor is coaxially disposed in the stator. Due to the adoption of the flat wire winding structure provided by the first aspect of the embodiment of the invention, when the second pin and the first pin of different flat wire coil conductors are bent and welded with each other, the end part of the flat wire winding structure can be lower than that of a single-layer flat wire winding structure in the prior art, and specifically, when the pins of different flat wire coil conductors are bent and welded, at least 7 wire slots need to be spanned by the single-layer flat wire winding structure in the prior art due to process requirements; the flat wire winding structure related to this embodiment adopts the span to be 6 wire casings or 7 wire casings, and is higher than the end height of prior art and has reduced by 10% at least, therefore the motor that this embodiment related to possesses and can have better torque output performance and possess higher power factor under low-speed for the motor has better efficiency performance when exporting.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A flat wire winding structure is arranged in a stator core, a plurality of wire slots are formed in a tooth part of the stator core, each wire slot is provided with a plurality of installation positions which are radially arranged and are even numbers and used for accommodating pins of a plurality of flat wire coil conductors, and the flat wire winding structure is characterized in that: the flat wire winding structure comprises a first phase winding, a second phase winding and a third phase winding, each phase winding comprises four parallel branches, and the first phase winding, the second phase winding and the third phase winding are all double-layer winding structures;
in one circle of winding of the stator core, each parallel branch is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot, and two different parallel branches of the same phase winding are overlapped in the wire slots to form the double-layer winding structure.
2. The flat wire winding structure of claim 1, wherein: each parallel branch of the first phase winding, the second phase winding and the third phase winding is formed by alternately connecting flat wire coil conductors with the span of 6 wire grooves or the span of 7 wire grooves, so that circulating current is prevented from being generated among different parallel branches.
3. The flat wire winding structure of claim 2, wherein: the number of turns of each parallel branch around the stator core is n, wherein:
when n is an even number, 1 st to 1 st of each of the parallel branches
And
n circles are led in from the upper layer of one wire groove and led out from the lower layer of the other wire groove across 6 wire grooves; the first of each parallel branch
To
The ring is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot across 7 wire slots;
when n is odd number, 1 st to 1 st of each parallel branch
And
n circles are led in from the upper layer of one wire groove and led out from the lower layer of the other wire groove across 6 wire grooves; the first of each parallel branch
To
Or
To
And the ring is led in from the upper layer of one wire slot and led out from the lower layer of the other wire slot across 7 wire slots.
4. The flat wire winding structure of claim 3, wherein: each wire casing is provided with 12 installation positions for containing the flat wire coil conductor, and the flat wire coil conductors passing through the 12 installation positions of each wire casing respectively belong to at least two parallel branches.
5. A stator comprising a stator core and the flat wire winding structure according to any one of claims 1 to 4; one axial end of the stator core is a winding hairpin end, and the other axial end of the stator core is a winding welding end; the flat wire winding structure is arranged in the stator iron core provided with a plurality of wire slots, and the flat wire coil conductor is inserted into the wire slots to complete the arrangement of the flat wire winding structure.
6. The stator of claim 5, wherein: the first phase winding, the second phase winding and the third phase winding respectively comprise a first parallel branch, a second parallel branch, a third parallel branch and a fourth parallel branch, and the relative positions of the outgoing line of the three-phase winding and the star point line are as follows:
the input lead ends of the parallel branches of the first phase winding, the second phase winding and the third phase winding are arranged at the winding card sending end in sequence as a first parallel branch of the first phase winding, a second parallel branch of the first phase winding, a first parallel branch of the second phase winding, a second parallel branch of the second phase winding, a first parallel branch of the third phase winding, a second parallel branch of the third phase winding, a third parallel branch of the first phase winding, a fourth parallel branch of the first phase winding, a third parallel branch of the second phase winding, a fourth parallel branch of the second phase winding, a third parallel branch of the third phase winding and a fourth parallel branch of the third phase winding.
7. The stator of claim 6, wherein: and the wire outlet ends of the first phase winding, the second phase winding and the third phase winding are connected through a bus bar.
8. The stator of claim 5, wherein: each wire slot contains 10 or more than 10 even number of flat wire coil conductors.
9. The stator of claim 5, wherein: the number of the wire slots of the stator core is 48.
10. An electrical machine comprising a stator according to any of claims 5-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011923.7A CN114726137A (en) | 2021-01-05 | 2021-01-05 | Flat wire winding structure and stator and motor comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011923.7A CN114726137A (en) | 2021-01-05 | 2021-01-05 | Flat wire winding structure and stator and motor comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114726137A true CN114726137A (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110011923.7A Pending CN114726137A (en) | 2021-01-05 | 2021-01-05 | Flat wire winding structure and stator and motor comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114726137A (en) |
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2021
- 2021-01-05 CN CN202110011923.7A patent/CN114726137A/en active Pending
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