CN110492647B - Method for restraining circular current of parallel branch of air gap winding - Google Patents
Method for restraining circular current of parallel branch of air gap winding Download PDFInfo
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- CN110492647B CN110492647B CN201810455895.6A CN201810455895A CN110492647B CN 110492647 B CN110492647 B CN 110492647B CN 201810455895 A CN201810455895 A CN 201810455895A CN 110492647 B CN110492647 B CN 110492647B
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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
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/47—Air-gap windings, i.e. iron-free windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
Abstract
The invention relates to a method for restraining the circulation current of a parallel branch of an air gap winding, wherein the winding is formed by nesting at least two sets of windings on the inner layer and the outer layer wound by a single-stranded wire, the nested inner layer and outer layer windings are ensured to have the same or close phase with the opposite electromotive force and the same or close amplitude of the same-phase back electromotive force by different connection modes of the inner layer and outer layer windings and different structural forms of the inner layer and outer layer windings, the same-phase windings with the characteristics are connected in parallel, and the three-phase windings are connected in a delta or Y shape according to the actual application. Compared with the prior art, the invention can effectively reduce or even eliminate the circulating current of the parallel branch, thereby reducing the circulating current loss of the winding, reducing the no-load and load loss of the motor, improving the efficiency of the motor, reducing the temperature rise of the motor and being suitable for the application of the coreless high-speed motor.
Description
Technical Field
The invention relates to a motor winding, in particular to a method for restraining circular current of a parallel branch of an air gap winding.
Background
For a permanent magnet motor without tooth slots, the main parts of the motor comprise a stator core, a stator winding, rotor magnetic steel and a rotating shaft, wherein the winding is the core part of the permanent magnet motor without tooth slots.
In a conventional coreless motor (for example, us 4,5543,507), because a winding is directly exposed to an air gap magnetic field, a large eddy current loss is induced in a magnetic field rotating at a high speed, for this reason, a coil needs to be wound by using a thin copper wire when designing the coreless winding, and based on this requirement, in order to fully utilize a stator and a rotor space of the motor, a coil needs to be wound by using a multi-strand parallel winding scheme, but if the conventional lap winding scheme is wound by using the multi-strand scheme, a phase difference is generated between the parallel wound coils, and if the two coils are connected in parallel, the phase difference causes internal circulation, which in turn causes loss;
patent CN200810065047.0 proposes that multiple strands of thin insulated wires are twisted into a spiral shape, which is beneficial to increase copper loss due to the circulation current caused by phase difference of different wires, but because the air gap lap winding needs to be flattened and rounded in the manufacturing process, the winding turn-to-turn damage is very easily caused by the manufacturing process of the multiple strands of spiral windings.
Patents US20090315427, US20070103025 and cn200610136515.x solve the problem of eddy current and circulation reduction in the toothless slot motor with the concentric winding to some extent, but the patents are only suitable for the concentric structure, are not suitable for the lap winding and the oblique winding, and cannot solve the problem of eddy current and circulation in the toothless slot motor with the lap winding and the oblique winding.
In the patents US20070103025 and cn200610136515.x, a plurality of windings need to be assembled and rounded in the winding manufacturing process, the process difficulty is large, and meanwhile, a single coil can only be wound into a diamond structure, which is not suitable for a hexagonal winding structure; patents CN201310021865.1 and CN201310188734.2 propose winding methods of non-slot windings and combination methods of different windings, but these two patents still do not solve the technical problem of circular current caused by parallel connection between phases at high power and high rotation speed of the non-slot motor.
Patent CN201710646697.3 proposes a nested winding for high-speed coreless motor, which is suitable for a lap winding, a wave winding and a concentric winding, and which can reduce the eddy current phenomenon of air gap winding, and the patent mentions that the nested inner and outer coils use multi-strand winding, and the loop current between the multi-strand winding is reduced between the nested inner and outer coils through a reasonable connection method, but the patent does not specifically suggest that the nested inner and outer coils use single-strand winding to generate inter-phase loop current due to uneven radial magnetic field distribution (for example, loop current generated by parallel connection of the nested outer coil phase a1 and the inner coil phase a2, loop current generated by parallel connection of the outer coil phase B1 and the inner coil phase B2, and loop current generated by parallel connection of the outer coil phase C1 and the inner coil phase C2).
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for inhibiting the circulating current of the parallel branch of the air gap winding.
The purpose of the invention can be realized by the following technical scheme:
a method for suppressing the circulating current of parallel branch of air gap winding features that at least two sets of windings are nested in the internal and external layers of winding wound by single-strand wire, and the different connection modes between internal and external layers and the different structure of internal and external layers can ensure the same or close phase of the nested internal and external layers to the same or similar phase of back electromotive force and the same or similar resistance and inductance.
Preferably, when the winding is formed by nesting an inner winding and an outer winding, the inner winding and the outer winding are nested in a mode that the same outlet ends of the inner winding and the outer winding and the circle center of the cross section of the winding are aligned in a space position or are slightly offset in a position, the nested winding forms a phase winding in a mode that an outer coil and an inner coil which are opposite in polarity are connected in series, the space position of the outer coil and the space position of the inner coil which are connected in series are different by 180 degrees or close to 180 degrees, the phase winding forms two sets of windings, the two sets of windings which are in the same phase are connected in parallel, other phase windings are formed in the same mode, and the three-phase winding can be connected in a delta or Y mode according to practical application.
Preferably, when the number K of the nested single-strand windings is greater than or equal to 3, K is an integer, the nested windings are mutually nested by the single-strand K sets of windings, when the nested windings are nested, the same outlet ends of the K layers of the same-phase coils with opposite polarities are aligned with the circle center of the cross section of the windings, the nested windings need to form phase windings in a manner of connecting the coils of different layers in series, but the coils connected in series have a spatial position difference of 180 degrees or close to 180 degrees and are connected in series in the manner, the same-phase windings can form two sets of windings, the two sets of windings in the same phase are connected in parallel, other phase windings are formed in the same manner, and the three-phase windings can be connected in a delta or Y mode according to practical application.
Preferably, when the winding is formed by nesting K sets of windings, K is more than 2 and is an even number, the same outlet ends of the K layers of the coils in the same phase are aligned with the circle center of the cross section of the winding during nesting; the nested windings need to form a phase winding in a mode that two coils with opposite polarities are connected in series, but the spatial positions of the two coils connected in series are different by 180 degrees or close to 180 degrees, the sum of the serial numbers of the two coils connected in series is equal to K +1 (the windings are numbered for one time according to the principle that the number of wound coils is radially distributed and in sequence), the same-phase windings form K sets of windings, the same-phase K sets of windings are connected in parallel, other phase windings are formed in the same mode, and the three-phase windings can be connected in a delta or Y mode according to practical application.
Preferably, the winding is formed by winding two wires in parallel, the two wires are distributed in the radial direction, the winding is composed of six or more coil groups, when the winding is connected, a phase winding is formed according to the mode that an outer layer wire and an inner layer wire which are distributed in the radial direction are connected in series, but the space position difference between the outer layer wire and the inner layer wire in the radial direction in series is 180 degrees or close to 180 degrees, the phase winding is connected in series according to the mode, the same phase winding forms two sets of windings, the two sets of windings in the same phase are connected in parallel, other phase windings are formed according to the same mode, and the three-phase winding can be connected in a delta or Y mode according to practical application;
if the number of parallel windings is K, K is more than 2 and K is an even number, phase windings are required to be formed in a mode that two radially distributed wires are connected in series when the windings are connected, but the spatial positions of two coils connected in series are different by 180 degrees or close to 180 degrees, the sum of the numbers of the two wires connected in series is equal to K +1, the phase windings are connected in series according to the mode, the same-phase windings form K sets of windings, but the stranded wires are required to be manufactured in a parallel winding mode and adopt the same wire diameter, coil pitch, coil straightness, winding height and turn number, the K sets of windings in phase are connected in parallel, other phase windings are formed according to the same mode, and the three-phase windings can be connected in a delta or Y mode according to actual application.
Preferably, when the winding is formed by nesting an inner winding and an outer winding, the inner winding and the outer winding are nested in a manner that the same outlet ends of the inner winding and the outer winding are aligned in a spatial position, the nested winding forms a phase winding in a manner that an outer coil and an inner coil with opposite polarities are connected in series, the spatial position difference between the outer coil and the inner coil in series is 0 degree or close to 0 degree, the outer coil and the inner coil are connected in series in the manner, the same-phase winding can form two sets of windings, the two sets of windings with the same phase are connected in parallel, other phase windings are formed in the same manner, and the three-phase winding can be connected in a delta or Y shape according to practical application.
Preferably, when the number K of the nested windings is greater than or equal to 3, K is an integer, the nested windings are nested with each other by a single-strand K set of windings, when the nested windings are nested, the same outlet ends of K layers of coils in the same phase are aligned with the circle center of the cross section of the windings, the nested windings need to form phase windings in a manner of connecting coils in series in different layers with opposite polarities, but the K sets of coils in series have a spatial position difference of 0 ° or close to 0 ° and are connected in series in the manner, the windings in the same phase form two sets of windings, the two sets of windings in the same phase are connected in parallel, other phase windings are formed in the same manner, and the three-phase windings can be connected in a delta or Y mode according to practical application.
Preferably, when a winding is formed by nesting K sets of windings, K is greater than 2, and K is an even number, the same outlet end of a K layer of a same-phase coil is aligned with the circle center O of the cross section of the winding when the winding is nested, the nested winding needs to form the phase winding in a mode that two coils with opposite polarities are connected in series, but the space position of the two coils connected in series is different by 0 degrees or close to 0 degrees, the sum of the numbers of the two coils connected in series is equal to K +1 (the windings are numbered in sequence once according to the principle that the winding numbers are distributed in a radial mode), the same-phase windings form the K sets of windings in series, the K sets of windings with the same phase are connected in parallel, other phase windings are formed in the same mode, and the three-phase windings can be connected in a delta or Y mode according to practical application.
Preferably, when the winding is formed by winding two wires in parallel, the two wires are distributed in the radial direction, the winding consists of six or more coil groups, when the winding is connected, a phase winding is formed according to a mode that an outer layer wire is connected with an inner layer wire in series, but the spatial position difference between the coil formed by the outer layer wire connected in series and the coil formed by the inner layer wire is 0 degree or close to 0 degree, the phase winding is connected in series according to the mode, the same phase winding forms two sets of windings, the two sets of windings in the same phase are connected in parallel, other phase windings are formed according to the same mode, and the three-phase winding can be connected in a delta or Y mode according to practical application;
if the number of parallel windings is K, K is more than 2 and K is an even number, phase windings are required to be formed in a mode that two wires with different layers are connected in series when the windings are connected, but the spatial positions of two coils connected in series are different by 0 degrees or close to 0 degrees, the sum of the numbers of the two wires connected in series is equal to K +1, the phase windings are connected in series according to the mode, the phase windings form K sets of windings, multiple strands of wires are required to be formed in a parallel winding mode and are connected in parallel by adopting the same wire diameter, coil pitch, coil straightness, winding height and turn number, the K sets of windings with the same phase are connected in parallel, other phase windings are formed in the same mode, and the three-phase windings can be connected in a delta or Y mode according to actual application.
Preferably, when the winding is formed by nesting an inner winding and an outer winding, the inner winding and the outer winding are nested in a manner that the same outlet ends of the inner winding and the outer winding are aligned in spatial positions, the nested winding is connected in series according to two coils of the same winding (such as the inner winding) with opposite polarities to form a phase winding, the spatial positions of the two coils connected in series of the same winding are different by 180 degrees or close to 180 degrees and are connected in series according to the manner, the outer winding and the inner winding form two sets of phase windings which are connected in series according to the manner, the in-phase winding forms two sets of windings which are connected in parallel, the two sets of in-phase windings are connected in parallel to form other phase windings according to the same manner, and the three-phase winding can be connected in a delta or Y shape according to actual application;
or when the number K of the nested single-strand windings is more than or equal to 3, K is an integer, the nested windings are mutually nested by the single-strand K sets of windings, when the nested windings are nested, the same outlet ends of the K layers of the coils in the same phase are aligned with the circle center of the cross section of the windings, the nested windings need to be connected in series according to two coils of the same winding (such as an inner layer winding) with opposite polarities to form a phase winding, but the spatial positions of the two coils connected in series by the same winding are different by 180 degrees or close to 180 degrees, the coils are connected in series according to the mode, the K sets of windings are connected in series, the K sets of windings are connected in parallel, the K sets of windings in the same phase are connected in parallel, other phase windings are formed according to the same mode, and the three-phase windings can be connected in a delta or Y mode according to practical application.
In the aspect of winding manufacturing, the inner layer single-strand winding and the outer layer single-strand winding need to adjust the wire diameter, the number of turns, the coil pitch, the winding height and the length of a coil straight-line section, so that under the action of the same one-pole permanent magnet rotor, the counter electromotive forces formed by the two sets of phase windings are the same or close to each other in amplitude and phase, and the direct current impedance and the inductance of the two sets of windings are also the same or close to each other.
The invention is not only suitable for the wiring mode that each layer of coil is a single-stranded wire winding, but also suitable for the wiring mode that a plurality of stranded wires or a plurality of stranded wires are wound around the winding;
the winding wiring mode of the invention generally refers to an air gap winding, and is suitable for lap winding, concentric winding and inclined winding;
the winding connection mode in the invention is suitable for one-pair and multi-pair permanent magnet rotor motors;
the invention refers to a single-layer winding consisting of 6 coils and 12 outgoing lines, which is not a coil of the type, and the reduction of the circular currents of the parallel branches by the winding wiring method mentioned in the invention is within the protection scope of the invention
The winding wiring mode provided by the invention can be connected on the outer side of the winding and can also be connected through an FPCB or a PCB electronic board, and the reduction of the circulating current of the parallel branch circuit through the winding wiring method is in the protection scope of the patent.
Compared with the prior art, the invention has the following advantages:
1. the outgoing line connection method of the nested winding can effectively reduce or even eliminate the circulating current of the parallel branch, further reduce the circulating current loss of the winding, reduce the no-load and load loss of the motor, improve the motor efficiency and reduce the motor temperature rise, and is suitable for the application of the coreless high-speed motor;
2. the outgoing line connection mode of the nested windings can reduce the circulating current in the two sets of winding parallel branches and can also reduce the circulating current in the multiple sets of winding parallel branches, and the nested winding parallel branch circuit has wide adaptability;
3. in the aspect of winding manufacturing, according to the actual application requirements, the single-layer winding needs to pass through the wire diameter, the number of turns, the coil pitch, the winding height and the length of a straight-line section of the coil, so that the winding performance can be met, the winding thickness can be improved, and the diversity and the qualification rate of winding manufacturing are improved;
4. the outgoing line connection mode of the nested windings can more effectively realize nesting of two sets of windings or a plurality of sets of windings, the same outgoing line ends of all layers of the same-phase coil are aligned with the circle center of the cross section of the winding during nesting, and even if the same outgoing line ends of all layers of the same-phase coil have smaller deviation with the circle center of the cross section of the winding during nesting, the circulating current in the parallel branch circuits of the plurality of sets of windings can be reduced or eliminated
5. The outgoing line connection method of the nested winding widens the voltage class of the motor, so that the motor is not only suitable for high-speed operation, but also suitable for high-speed motors with different voltage classes;
6. the outgoing line connection method of the nested winding is suitable for different types of air gap windings, is not only suitable for the stacked winding, but also suitable for concentric windings and oblique windings;
7. the multi-strand parallel winding can still realize the advantage of reducing the circulating current loss of the winding according to the same wiring principle.
Drawings
FIG. 1 is a schematic diagram of a nested winding structure and a coil outlet connection;
FIG. 2 is a schematic diagram of a structure of two wires wound around a winding and a connection method of the coil outlet end;
FIG. 3 is a schematic diagram of spatial position angle definition of nested coils;
FIG. 4 is a schematic diagram of the spatial position angle definition of a coil with two wires wound in parallel;
FIG. 5 is an expanded view of a single layer air gap lap;
FIG. 6 is a diagram illustrating the basic coil parameter definition;
FIG. 7 is a schematic diagram of the wiring mode of two A-phase windings of the double-layer air-gap winding of the present invention;
FIG. 8 is a schematic diagram of the wiring of one winding of phase A of the four-layer air gap winding of the present invention, and the other winding of phase A in the same manner;
FIG. 9 is a schematic diagram of the wiring of two sets of windings of the A phase of the four-layer air gap winding of the present invention, and the connection mode of the other two sets of windings of the A phase is the same;
FIG. 10 is a schematic diagram of the wiring of two phase windings of the air gap winding A with two parallel-wound wires according to the present invention;
FIG. 11 is a schematic diagram of two sets of windings of phase A wound by four wires according to the present invention, and the other two sets of windings of phase A are connected in the same manner;
FIG. 12 is a schematic diagram of the wiring mode of two A-phase windings of the double-layer air-gap winding of the present invention;
FIG. 13 is a schematic diagram of the four-layer air gap winding of the present invention in which one set of A-phase windings are connected and the other set of A-phase windings are connected in the same manner;
FIG. 14 is a schematic diagram of the wiring of two sets of windings of phase A of the four-layer air gap winding of the present invention, wherein the wiring of the other two sets of windings of phase A has the same wiring mode;
FIG. 15 is a schematic diagram of the wiring of two sets of windings of phase A of an air gap winding with two parallel-wound wires according to the present invention;
FIG. 16 is a schematic diagram of four conductors of the present invention wound around two sets of windings of phase A, the other two sets of windings of phase A being connected in the same manner;
FIG. 17 is a schematic diagram of a conventional connection method for phase A of two-phase parallel winding;
FIG. 18 is a schematic diagram of the wiring mode of two A-phase windings of the double-layer air-gap winding of the present invention;
FIG. 19 is a schematic diagram of the wiring of the four-phase winding of the invention with four layers of air-gap windings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The invention provides a nested inner and outer layer winding which are wound by adopting single-stranded wires, and the nested inner and outer layer winding is formed by different connection modes of the inner and outer layer windings (the inner layer winding is connected with the outer layer winding in series) and different structural forms of the inner and outer layer windings (for example, the inner and outer layer windings have different coil pitches, linear edge lengths and winding heights), the winding nested winding structure and the winding connection mode are shown in fig. 1, the phases of back electromotive forces of nested inner and outer layers of windings in the same phase (the phase A1 of the phase A winding is close to the phase A2) are ensured to be the same or close, and the amplitudes of the same electromotive force and the opposite electromotive force are equal or close to each other, and simultaneously the relationship that the resistance and the inductance of the same phase of the inner nested winding and the outer nested winding are the same or close to each other is ensured, the interphase circulating current caused by parallel connection of the inner and outer layers of the single-wound-phase nested winding can be reduced, and the circulating current between the same phases (between the A1 and A2 of the A-phase winding) can be reduced to the minimum value or a level close to zero; finally, the nested inner and outer windings form a set of windings of the motor, and the windings can be connected in a delta mode or a Y mode according to the actual application requirements.
Example 1
The winding is formed by nesting an inner winding and an outer winding which are wound by a single-strand wire, the inner winding Coil1 consists of six coils, the six coils are A1X1, B1Y1, C1Z1, A2X2, B2Y2 and C2Z2 respectively, the spatial distribution positions of the six coils are that A1X1 and A2X2 are different by 180 degrees, A1 and X2 are different by 180 degrees, and X1 and A2 are different by 180 degrees; B1Y1 differs from B2Y2 by 180 °, B1 differs from Y2 by 180 °, Y1 differs from B2 by 180 °; C1Z1 differs from C2Z2 by 180 °, C1 differs from Z2 by 180 °, Z1 differs from C2 by 180 °; the outer-layer winding Coil2 is composed of six coils, namely A11X11, B11Y11, C11Z11, A22X22, B22Y22 and C22Z22, wherein the spatially distributed positions of A11X11 and A22X22 are different by 180 degrees, A11 and X22 are different by 180 degrees, and X11 and A22 are different by 180 degrees; B11Y11 differs from B22Y22 by 180 °, B11 differs from Y22 by 180 °, Y11 differs from B22 by 180 °; C11Z11 differs from C22Z22 by 180 °, C11 differs from Z22 by 180 °, Z11 differs from C22 by 180 °; the inner-layer winding Coil1 and the outer-layer winding Coil2 are nested in a way that the same outlet ends of the inner layer and the outer layer are aligned in space position or slightly deviated in position, so that the formed integral winding is called a nested winding, and for example, the A1 and the A11 are nested in a way that the centers O of the cross sections of the windings are aligned or slightly deviated.
The nested windings need to form a phase winding in a mode that an outer coil and an inner coil are connected in series, but the spatial position difference between the outer coil and the inner coil which are connected in series is 180 degrees or close to 180 degrees, a spatial position schematic diagram of the nested multi-layer coil is given in fig. 3, the nested multi-layer coil is connected in series in the mode, the same-phase winding can form two sets of windings, under the action of the same one-pole permanent magnet rotor, the counter electromotive force formed by the two sets of windings is the same or close to the amplitude and the phase, the direct current impedance and the inductance of the two sets of windings are also the same or close to each other, the two sets of windings are connected in parallel, and the circulating current in a parallel branch is zero or the circulating current value is reduced to the minimum; for example, a line outlet end X1 is connected with a line outlet end a22 to form a phase winding CoilA1, two line outlet ends of the phase winding CoilA1 become a1 and X22, a line outlet end X11 is connected with a line outlet end a2 to form a phase winding CoilA2, two line outlet ends of the phase winding CoilA2 become a11 and X2, and the connection mode is as shown in fig. 7; under the rotation action of the same pair of permanent magnet rotors, the opposite electromotive forces EA1 and EA2 generated by the phase windings CoilA1 and CoilA2 are the same or close to each other in amplitude and phase, the direct current resistance and inductance of the phase windings CoilA1 and CoilA2 are the same or close to each other, the phase windings CoilA1 and CoilA2 are connected in parallel to form the phase A winding CoilA of the nested winding, and under the action of the pair of permanent magnet rotors rotating at high speed, the internal circulation of the phase A winding CoilA is zero or small; in addition, the outlet terminal a1 and the outlet terminal X22 may be connected to form a phase winding CoilA1, so that two outlet terminals of the phase winding CoilA1 become a22 and X1, the outlet terminal a11 and the outlet terminal X2 are connected to form a phase winding CoilA2, and two outlet terminals of the phase winding CoilA2 become a2 and X11; under the rotation action of the same pair of permanent magnet rotors, the opposite electromotive forces EA1 and EA2 generated by the phase windings CoilA1 and CoilA2 are the same or close to each other in amplitude and phase, the direct current resistance and inductance of the phase windings CoilA1 and CoilA2 are the same or close to each other, the phase windings CoilA1 and CoilA2 are connected in parallel to form the phase A winding CoilA of the nested winding, and under the action of the pair of permanent magnet rotors rotating at high speed, the internal circulation of the phase A winding CoilA is zero or the circulation value is reduced to the minimum value; in the same manner as the a-phase winding, a B-phase winding and a C-phase winding may be formed; according to different practical applications, the A-phase winding, the B-phase winding and the C-phase winding can be connected in a delta connection mode or a Y connection mode to form a three-phase winding of nested windings.
When the number of the nested single-stranded windings is larger than or equal to 3, the number is K, K is an integer and is larger than or equal to 3, the nested windings are nested with each other by the single-stranded K sets of windings, and the windings are nested in a manner that the same outlet ends of the K layers of the coils in the same phase are aligned with the circle center O of the cross section of the windings, such as A1, A11 and A111 … … are aligned with the circle center O of the cross section of the windings; the nested windings need to form phase windings in a mode that coils of different layers are connected in series, but the coils connected in series have a spatial position difference of 180 degrees or close to 180 degrees, and are connected in series according to the mode, the same-phase windings can form two sets of windings, under the action of the same one-pole permanent magnet rotor, the back electromotive force formed by the two sets of windings is the same or close to the amplitude and the phase, the direct current impedance and the inductance of the two sets of windings are also the same or close to each other, the two sets of windings are connected in parallel, the circulating current in a parallel branch circuit is zero or the circulating current value is reduced to the minimum, the wiring mode of the four layers of windings is shown in fig. 8, the wiring mode of one set of windings of the A-phase windings is shown in fig. 8, and the wiring mode of the other set of the A-phase windings can be connected according to the same mode.
The winding is formed by nesting K sets of windings, K is more than 2 and is an even number, the K sets of coils are respectively Coil1, Coil2 and Coil3 … … Coil, and the winding nesting is carried out in the nesting mode that the same outlet ends of the K layers of the coils in the same phase are aligned with the circle center O of the cross section of the winding, such as A1, A11 and A111 … … are aligned with the circle center O of the cross section of the winding; the nested windings need to form a phase winding in a manner that two coils in different layers are connected in series, but the spatial positions of the two coils in series are different by 180 degrees or close to 180 degrees, and the sum of the serial numbers of the two coils in series is equal to K +1, for example, Coil1 is connected in series with CoilK, and Coil2 is connected in series with CoilK-1; according to the above manner, the same-phase windings can form K sets of windings, under the action of the same pair of permanent magnet rotors, the back electromotive force formed by the K sets of windings is the same or close in amplitude and phase, and the direct current impedance and inductance of the K sets of windings are also the same or close, the K sets of windings are connected in parallel, the circulating current in the parallel branch is zero or the circulating current value is reduced to the minimum, the wiring manner of the four layers of windings is as shown in fig. 9, fig. 9 shows the wiring manner of the two sets of windings of the a-phase winding, and the other two sets of windings of the a-phase winding can be wired in the same manner.
In the nested winding formed in the above way, in terms of winding manufacturing, the single-strand windings of each layer can adopt the same wire diameter or different wire diameters; the single-strand windings of each layer can adopt the same coil pitch or different coil pitches; each layer of single-strand winding can adopt the same coil straight-line segment or different straight-line edges; the winding heights of the single-strand windings of each layer can be the same or different; the single-strand windings of each layer can adopt the same number of turns or different numbers of turns, fig. 5 is a development diagram of the single-layer air-gap winding, and fig. 6 is a basic parameter description of the coil; however, the single-layer single-strand winding needs to use the same wire diameter, the same coil pitch, the same straight coil segment and the same number of turns, and the same-phase winding needs to be formed in such a way that different layers of coils are connected in series, but the spatial positions of the coils of the series layers are different by 180 ° or close to 180 °.
The nested winding has the advantages of reducing winding eddy current and not introducing winding circulation, has higher flexibility in the aspect of winding manufacturing, can understand each winding as independent winding nesting, can select proper wire diameter, coil pitch, straight line segment, winding height and turn number for different layers of windings according to the actual application requirement, can meet the motor performance, can control the winding thickness and simultaneously improve the qualified rate of winding manufacturing.
In addition, fig. 2 shows a winding structure and a connection method for two parallel wires, and fig. 4 is a coil space position angle defined by the two parallel wires.
The winding is formed by winding and winding two strands of folded yarns in parallel, the two strands of conducting wires are distributed in a radial direction, the winding consists of six (or) a plurality of coil groups, when the winding is connected, a phase winding is required to be formed according to a mode that an outer layer conducting wire is connected with an inner layer conducting wire in series, the space position of the outer layer conducting wire coil connected in series and the inner layer conducting wire coil is different by 180 degrees or close to 180 degrees, if the number of the wound coils is K, K is more than 2 and is even, when the winding is connected, a phase winding is required to be formed according to a mode that two different layers of conducting wires are connected in series, the same phase winding can form K sets of windings according to the mode, but the space position of the two coils connected in series is different by 180 degrees or close to 180 degrees, the sum of the numbers of the two conducting wires connected in series is equal to K +1, FIG. 10 is a mode of connecting two sets of A-phase windings of air gap windings with the wound conducting wires in parallel, FIG. 11 is a mode that four conducting wires are wound in parallel, the other two sets of windings of the A phase are connected in the same mode.
Example 2
The winding is formed by nesting an inner winding and an outer winding which are wound by a single-strand wire, the inner winding Coil1 consists of six coils, the six coils are A1X1, B1Y1, C1Z1, A2X2, B2Y2 and C2Z2 respectively, the spatial distribution positions of the six coils are that A1X1 and A2X2 are different by 180 degrees, A1 and X2 are different by 180 degrees, and X1 and A2 are different by 180 degrees; B1Y1 differs from B2Y2 by 180 °, B1 differs from Y2 by 180 °, Y1 differs from B2 by 180 °; C1Z1 differs from C2Z2 by 180 °, C1 differs from Z2 by 180 °, Z1 differs from C2 by 180 °; the outer-layer winding Coil2 is composed of six coils, namely A11X11, B11Y11, C11Z11, A22X22, B22Y22 and C22Z22, wherein the spatially distributed positions of A11X11 and A22X22 are different by 180 degrees, A11 and X22 are different by 180 degrees, and X11 and A22 are different by 180 degrees; B11Y11 differs from B22Y22 by 180 °, B11 differs from Y22 by 180 °, Y11 differs from B22 by 180 °; C11Z11 differs from C22Z22 by 180 °, C11 differs from Z22 by 180 °, Z11 differs from C22 by 180 °; the inner-layer winding Coil1 and the outer-layer winding Coil2 are nested in a way that the same outlet ends of the inner layer and the outer layer are aligned in space positions, so that the formed integral winding is called a nested winding, and for example, the A1 and the A11 are nested in a way that the circle center O of the cross section of the winding is aligned.
The nested windings need to form a phase winding in a mode that an outer coil and an inner coil are connected in series, but the spatial position of the outer coil and the inner coil which are connected in series is different from 0 DEG or close to 0 DEG, the nested windings are connected in series according to the mode, the same-phase windings can form two sets of windings, the spatial position of the two sets of phase windings is different from 180 DEG or close to 180 DEG, under the action of the same one-pole permanent magnet rotor, the counter electromotive force formed by the two sets of windings is the same or close to the amplitude and the phase, the direct current impedance and the inductance of the two sets of windings are also the same or close to each other, the two sets of windings are connected in parallel, and the circulating current in a parallel branch is zero or the circulating current value is reduced to the minimum; for example, a line outlet end X1 is connected with a line outlet end a11 to form a phase winding CoilA1, two line outlet ends of the phase winding CoilA1 become a1 and X11, a line outlet end X22 is connected with a line outlet end a2 to form a phase winding CoilA2, two line outlet ends of the phase winding CoilA2 become a22 and X2, and the connection mode is as shown in fig. 12; under the rotation action of the same pair of permanent magnet rotors, the opposite electromotive forces EA1 and EA2 generated by the phase windings CoilA1 and CoilA2 are the same or close to each other in amplitude and phase, the direct current resistance and inductance of the phase windings CoilA1 and CoilA2 are the same or close to each other, the phase windings CoilA1 and CoilA2 are connected in parallel to form the phase A winding CoilA of the nested winding, and under the action of the pair of permanent magnet rotors rotating at high speed, the internal circulation of the phase A winding CoilA is zero or small; in addition, the outlet terminal a1 and the outlet terminal X11 may be connected to form a phase winding CoilA1, so that two outlet terminals of the phase winding CoilA1 become a11 and X1, the outlet terminal a22 and the outlet terminal X2 are connected to form a phase winding CoilA2, and two outlet terminals of the phase winding CoilA2 become a2 and X22; under the rotation action of the same pair of permanent magnet rotors, the opposite electromotive forces EA1 and EA2 generated by the phase windings CoilA1 and CoilA2 are the same or close to each other in amplitude and phase, the direct current resistance and inductance of the phase windings CoilA1 and CoilA2 are the same or close to each other, the phase windings CoilA1 and CoilA2 are connected in parallel to form the phase A winding CoilA of the nested winding, and under the action of the pair of permanent magnet rotors rotating at high speed, the internal circulation of the phase A winding CoilA is zero or the circulation value is reduced to the minimum value; in the same manner as the a-phase winding, a B-phase winding and a C-phase winding may be formed; according to different practical applications, the A-phase winding, the B-phase winding and the C-phase winding can be connected in a delta connection mode or a Y connection mode to form a three-phase winding of nested windings.
When the number of the nested windings is larger than or equal to 3, the number is K, K is an integer, K is larger than or equal to 3, the nested windings are nested with each other by a single-strand K set of windings, when the nested windings are nested, the same outlet ends of K layers of coils in the same phase are aligned with the circle center O of the cross section of the windings, for example, A1, A11 and A111 … … are aligned with the circle center O of the cross section of the windings, the nested windings need to form phase windings in a mode of serially connecting coils in different layers, but the K sets of coils in series are connected in a mode of 0-degree or close to 0-degree in spatial position, the windings in the same phase can form two sets of windings, the wiring mode of four layers of windings is shown in fig. 13, fig. 13 shows the wiring mode of one set of windings in A phase, and the other set of windings in A phase can be wired in the same mode. .
The winding is formed by nesting K sets of windings, K is more than 2 and is an even number, the K sets of coils are respectively Coil1, Coil2 and Coil3 … … Coil, and the winding nesting is carried out in the nesting mode that the same outlet ends of the K layers of the coils in the same phase are aligned with the circle center O of the cross section of the winding, such as A1, A11 and A111 … … are aligned with the circle center O of the cross section of the winding; the nested windings need to form a phase winding in a manner that two coils in different layers are connected in series, but the spatial positions of the two coils in series are different by 0 degrees or close to 0 degrees, and meanwhile, the sum of the serial numbers of the two coils in series is equal to K +1, for example, Coil1 is connected in series with CoilK, and Coil2 is connected in series with CoilK-1; the same-phase windings can form K sets of windings which are connected in series in the manner, under the action of the same pair of permanent magnet rotors, the back electromotive force formed by the K sets of windings is the same or close to the K sets of windings in amplitude and phase, the direct current impedance and the inductance of the K sets of windings are also the same or close to each other, the K sets of windings are connected in parallel, the circulating current in parallel branches is zero or the circulating current value is reduced to the minimum, the wiring mode of four layers of windings is shown in fig. 14, the wiring mode of two sets of windings of the A-phase winding is shown in fig. 14, and the other two sets of windings of the A-phase winding can be connected in the same mode.
In the nested winding formed in the above way, in terms of winding manufacturing, the single-strand windings of each layer can adopt the same wire diameter or different wire diameters; the single-strand windings of each layer can adopt the same coil pitch or different coil pitches; each layer of single-strand winding can adopt the same coil straight-line segment or different straight-line edges; the winding heights of the single-strand windings of each layer can be the same or different; the single-strand windings of each layer can adopt the same number of turns or different numbers of turns; however, the single-layer single-strand windings need to have the same wire diameter, the same coil pitch, the same straight coil segment and the same number of turns, and the in-phase windings need to be formed in such a manner that one outer coil is connected in series with one inner coil, but the outer coil and the inner coil connected in series are spatially located at a difference of 0 ° or close to 0 °.
The nested winding has the advantages of reducing winding eddy current and simultaneously not introducing winding circulation in the aspect of winding performance, has larger flexibility in the aspect of winding manufacturing, can understand the winding as independent windings which are mutually nested, can select proper wire diameter, coil pitch, straight line segment, winding height and turn number for each layer of winding according to the actual application requirement, can meet the motor performance, can also control the winding thickness, and improves the qualified rate of winding manufacturing.
In addition, the first and second substrates are,
the winding is formed by winding and winding two strands of folded yarns in parallel, the two strands of conducting wires are distributed in a radial direction, the winding consists of six (or) a plurality of coil groups, when the winding is connected, a phase winding is required to be formed according to a mode that an outer layer conducting wire is connected with an inner layer conducting wire in series, the space position of the outer layer conducting wire coil connected in series is different from that of the inner layer conducting wire coil by 0 degrees or close to 0 degrees, if the number of the wound coils is K, K is more than 2 and K is an even number, when the winding is connected, the phase winding is required to be formed according to a mode that two different layers of conducting wires are connected in series, the space position of the two coils connected in series is different by 0 degrees or close to 0 degrees, meanwhile, the sum of the numbers of the two conducting wires connected in series is equal to K +1, the same-phase winding can form K sets of windings, FIG. 15 is a mode that two sets of windings are connected by an air gap winding A phase winding with the conducting wires wound in parallel, FIG. 16 is that four conducting wires wound in parallel, the connection diagram of the two sets of windings of the phase A is shown, the other two sets of windings of the phase A can be connected in the same mode, fig. 17 shows the connection mode of the two sets of windings of the phase A of the traditional two-strand parallel-wound wire, and the traditional multi-strand parallel-wound wire is still connected in the same mode, which cannot solve the problem of circulation of parallel branches.
Example 3
The winding is formed by nesting an inner winding and an outer winding which are wound by a single-strand wire, the inner winding Coil1 consists of six coils, the six coils are A1X1, B1Y1, C1Z1, A2X2, B2Y2 and C2Z2 respectively, the spatial distribution positions of the six coils are that A1X1 and A2X2 are different by 180 degrees, A1 and X2 are different by 180 degrees, and X1 and A2 are different by 180 degrees; B1Y1 differs from B2Y2 by 180 °, B1 differs from Y2 by 180 °, Y1 differs from B2 by 180 °; C1Z1 differs from C2Z2 by 180 °, C1 differs from Z2 by 180 °, Z1 differs from C2 by 180 °; the outer-layer winding Coil2 is composed of six coils, namely A11X11, B11Y11, C11Z11, A22X22, B22Y22 and C22Z22, wherein the spatially distributed positions of A11X11 and A22X22 are different by 180 degrees, A11 and X22 are different by 180 degrees, and X11 and A22 are different by 180 degrees; B11Y11 differs from B22Y22 by 180 °, B11 differs from Y22 by 180 °, Y11 differs from B22 by 180 °; C11Z11 differs from C22Z22 by 180 °, C11 differs from Z22 by 180 °, Z11 differs from C22 by 180 °; the inner-layer winding Coil1 and the outer-layer winding Coil2 are nested in a way that the same outlet ends of the inner layer and the outer layer are aligned in space positions, so that the formed integral winding is called a nested winding, and for example, the A1 and the A11 are nested in a way that the circle center O of the cross section of the winding is aligned.
The nested windings need to form a phase winding by connecting two coils of the same winding (such as an inner layer winding) in series, but the two coils of the same winding connected in series have a spatial position difference of 180 degrees or close to 180 degrees, and are connected in series according to the above manner, the outer layer winding and the inner layer winding respectively form a set of phase winding, and the two sets of phase windings have a spatial position difference of 0 degree or close to 0 degree; according to the nested windings formed in the manner, in the aspect of winding manufacturing, the inner layer single-strand winding and the outer layer single-strand winding need to realize that under the action of the same one-pole permanent magnet rotor, the counter electromotive forces formed by the two sets of phase windings are the same or close in amplitude and phase, the direct current impedance and the inductance of the two sets of windings are also the same or close, the two sets of windings are connected in parallel, and the circulating current in a parallel branch is zero or the circulating current value is reduced to the minimum; for example, a line outlet end X1 is connected with a line outlet end a2 to form a phase winding CoilA1, two line outlet ends of the phase winding CoilA1 become a1 and X2, a line outlet end X11 is connected with a line outlet end a22 to form a phase winding CoilA2, two line outlet ends of the phase winding CoilA2 become a11 and X22, and the connection manner is as shown in fig. 18; under the rotation action of the same pair of permanent magnet rotors, the opposite electromotive forces EA1 and EA2 generated by the phase windings CoilA1 and CoilA2 are the same or close to each other in amplitude and phase, the direct current resistance and inductance of the phase windings CoilA1 and CoilA2 are the same or close to each other, the phase windings CoilA1 and CoilA2 are connected in parallel to form the phase A winding CoilA of the nested winding, and under the action of the pair of permanent magnet rotors rotating at high speed, the internal circulation of the phase A winding CoilA is zero or small; in addition, the outlet terminal a1 and the outlet terminal X2 may be connected to form a phase winding CoilA1, so that two outlet terminals of the phase winding CoilA1 become a2 and X1, the outlet terminal a11 and the outlet terminal X22 are connected to form a phase winding CoilA2, and two outlet terminals of the phase winding CoilA2 become a22 and X11; under the rotation action of the same pair of permanent magnet rotors, the opposite electromotive forces EA1 and EA2 generated by the phase windings CoilA1 and CoilA2 are the same or close to each other in amplitude and phase, the direct current resistance and inductance of the phase windings CoilA1 and CoilA2 are the same or close to each other, the phase windings CoilA1 and CoilA2 are connected in parallel to form the phase A winding CoilA of the nested winding, and under the action of the pair of permanent magnet rotors rotating at high speed, the internal circulation of the phase A winding CoilA is zero or the circulation value is reduced to the minimum value; in the same manner as the a-phase winding, a B-phase winding and a C-phase winding may be formed; according to different practical applications, the A-phase winding, the B-phase winding and the C-phase winding can be connected in a delta connection mode or a Y connection mode to form a three-phase winding of nested windings.
When the number of the nested single-stranded windings is larger than or equal to 3, the number is K, K is an integer and is larger than or equal to 3, the nested windings are nested with the single-stranded K sets of windings, the nested windings are nested in a manner that the same outlet end of a K layer of coils in the same phase is aligned with the circle center O of the cross section of the windings, such as A1, A11 and A111 … …, and the nested windings are required to be connected in series to form a phase winding according to the fact that two coils of the same winding (such as an inner layer winding) are connected in series, but the space positions of the two coils connected in series in the same winding are different by 180 degrees or close to 180 degrees, the nested windings are connected in series according to the manner, the K sets of windings form a K sets of phase windings, and the K sets of phase windings are different by 0 degree or close to 0 degree in the space positions; in terms of winding manufacturing, K sets of single-strand windings need to realize that under the action of the same pair-pole permanent magnet rotor, the back electromotive force formed by the K sets of phase windings is the same or close in amplitude and phase, and the direct current impedance and inductance of the K sets of windings are also the same or close, the K sets of windings are connected in parallel, the circulating current in a parallel branch is zero or the circulating current value is reduced to the minimum, the connection mode of four layers of windings is shown in fig. 19, and fig. 19 shows the connection mode of four sets of windings of the a-phase winding.
However, in terms of winding manufacturing, the mutually nested windings need to realize that under the action of the same one-pole permanent magnet rotor, the back electromotive force formed by the windings of each phase is the same or close in amplitude and phase, and the direct current impedance and the inductance of the two sets of windings are also the same or close.
The spatial position angle of the nested coil defined in the specification of the application is 0 degrees or 180 degrees, and the spatial position angle of the multi-strand radial parallel winding coil is 0 degrees or 180 degrees, wherein the angle of 0 degrees or 180 degrees is completely theoretical 0 degrees or 180 degrees, and the actual spatial position angle of the coil can have smaller deviation and the deviation still remains in the protection scope of the application;
the application only exemplifies two-layer or four-layer winding nesting, two leads are parallel-wound or four leads are parallel-wound, and the reduction of the circulating current of the air gap winding parallel branch circuit according to the technical idea in the application belongs to the protection scope of the application;
the wire connection mode of the outlet end of the air gap winding mentioned in the application only provides a wire connection thought, and the wire connection through other modes (external wire connection or a PCB circuit board) is within the protection scope of the application;
the winding wiring mode mentioned in the application is suitable for lap winding (the lap winding is taken as an example in the application), and is also suitable for concentric winding and oblique winding, the outgoing line definitions and the coil parameter definitions of the concentric winding, the oblique winding and the lap winding are different, but the wiring mode for reducing parallel branch loop current is the same, and the concentric winding, the oblique winding and the lap winding are all in the protection scope of the application.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method for restraining the circulation current of a parallel branch of an air gap winding is characterized in that the winding is formed by nesting at least two sets of windings on the inner layer and the outer layer wound by a single-stranded wire, the same or close phase of the nested inner layer and outer layer windings and the same or close phase of opposite electromotive force are ensured through different connection modes of the inner layer and outer layer windings and different structural forms of the inner layer and outer layer windings, the amplitude of in-phase back electromotive force is equal or close, and the same or close relationship of the same-phase resistance and inductance of the nested inner layer and outer layer windings is ensured;
when the winding is formed by nesting the inner winding and the outer winding, the inner winding and the outer winding are nested in a mode that the same outlet ends of the inner winding and the outer winding are aligned in the spatial position, the nested winding forms a phase winding in a mode that one outer coil and one inner coil with opposite polarities are connected in series, the spatial position difference between the outer coil and the inner coil in series is 0 degree or close to 0 degree, the outer coil and the inner coil in series are connected in series in the mode, and the same phase winding can form two sets of windings.
2. The method according to claim 1, wherein when the winding is formed by nesting an inner winding and an outer winding, the inner winding and the outer winding are nested in a manner that the same outlet ends of the inner winding and the outer winding are aligned with the circle center of the cross section of the winding in the space position or are slightly deviated from the space position, the nested winding forms a phase winding in a manner that an outer coil and an inner coil which are opposite in polarity are connected in series, the space position of the outer coil and the inner coil which are connected in series is different from each other by 180 degrees or close to 180 degrees, and the phase winding forms two sets of windings.
3. The method according to claim 1, wherein when the number K of the nested single-strand windings is greater than or equal to 3, K is an integer, the nested windings are nested with each other by the single-strand K set of windings, when the nested windings are nested, the same outlet ends of the K layers of the coils with the same phase and opposite polarities are aligned with the circle center of the cross section of the windings, the nested windings need to form the phase windings in a manner that the coils with different layers are connected in series, but the coils in series are different from each other by 180 degrees or close to 180 degrees in spatial position, and the coils in series are connected in the manner, and the same phase windings can form two sets of windings.
4. The method of claim 1, wherein when the winding is formed by nesting K sets of windings, K is more than 2, and K is an even number, the same outlet ends of K layers of coils in the same phase are aligned with the circle center of the cross section of the winding when the windings are nested; the nested windings need to form phase windings in a mode that two coils with opposite polarities are connected in series, but the spatial positions of the two coils connected in series are different by 180 degrees or close to 180 degrees, meanwhile, the sum of the serial numbers of the two coils connected in series is equal to K +1, and the same-phase windings form K sets of windings.
5. The method according to any one of claims 2-4, wherein the winding is formed by winding two wires in parallel, the two wires are distributed in a radial direction, the winding is formed by a plurality of coil groups, when the winding is connected, the phase winding is formed in a manner that an outer wire and an inner wire which are distributed in the radial direction are connected in series, but the spatial positions of the outer wire and the inner wire in the radial direction which are connected in series are different by 180 degrees or close to 180 degrees;
if the number of the parallel windings is K, K is more than 2 and K is an even number, a phase winding is required to be formed in a mode that two radially distributed wires are connected in series when the windings are connected, but the spatial positions of two coils connected in series are different by 180 degrees or close to 180 degrees, the sum of the numbers of the two wires connected in series is equal to K +1, the two wires are connected in series according to the mode, the same phase winding forms K sets of windings, but the same wire diameter, coil pitch, coil straightness, winding height and turns are required to be adopted when the multi-strand parallel winding is manufactured.
6. The method according to claim 1, wherein when the number of the nested windings K is greater than or equal to 3, K is an integer, the nested windings are nested with each other by a single K-set of windings, the same outlet ends of the K layers of the coils in the same phase are aligned with the circle center of the cross section of the windings when the nested windings are nested, the nested windings need to form the phase windings in a manner that the coils in different layers with opposite polarities are connected in series, but the K sets of coils in series are connected in series at spatial positions with a difference of 0 ° or close to 0 °, and the windings in the same phase form two sets of windings.
7. The method as claimed in claim 1, wherein when the winding is formed by nesting K sets of windings, K > 2, and K is an even number, the same outlet end of the K layers of the coils of the same phase is aligned with the center O of the cross section of the winding when the winding is nested, the nested winding needs to form the phase winding in a manner that two coils of different layers with opposite polarities are connected in series, but the spatial positions of the two coils connected in series are different by 0 ° or close to 0 °, and the sum of the numbers of the two coils connected in series at the same time is equal to K +1, and the coils of the same phase are connected in series in the manner that the windings form the K sets of windings.
8. The method according to any one of claims 6-7, wherein when the winding is formed by winding two wires in parallel, the two wires are distributed in a radial direction, the winding is formed by a plurality of coil groups, and the winding is connected in a manner that an outer wire is connected in series with an inner wire to form a phase winding, but the spatial position of the coil formed by the outer wire connected in series is different from that of the coil formed by the inner wire by 0 ° or close to 0 °;
if the number of the parallel winding is K, K is more than 2 and K is an even number, a phase winding is required to be formed in a mode that two wires with different layers are connected in series when the windings are connected, but the spatial positions of two coils connected in series are different by 0 degrees or close to 0 degrees, the sum of the numbers of the two wires connected in series is equal to K +1, the two wires are connected in series according to the mode, the same phase winding forms K sets of windings, and the multiple strands of wires are wound around the windings to form the phase winding which needs to adopt the same wire diameter, coil pitch, coil straightness, winding height and turn number.
9. The method according to claim 1, wherein when the winding is formed by nesting an inner winding and an outer winding, the inner winding and the outer winding are nested in a manner that the same wire outlet ends of the inner winding and the outer winding are aligned in spatial positions, the nested windings are connected in series according to two coils of the same winding with opposite polarities to form a phase winding, the two coils of the same winding in series have a spatial position difference of 180 degrees or close to 180 degrees, and the outer winding and the inner winding are connected in series according to the manner, so that the outer winding and the inner winding form two sets of phase windings;
or when the number K of the nested single-stranded windings is more than or equal to 3, K is an integer, the nested windings are mutually nested by the single-stranded K sets of windings, the same outlet end of the same phase coil K layer is aligned with the circle center of the cross section of the winding when the nested windings are nested, the nested windings need to be connected in series according to two coils of the same winding with opposite polarities to form a phase winding, but the spatial positions of the two coils of the same winding in series are different by 180 degrees or close to 180 degrees, and the two coils are connected in series according to the mode to form the K sets of windings.
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| CN207320983U (en) * | 2017-11-10 | 2018-05-04 | 广东威灵电机制造有限公司 | Stator and the motor with the stator |
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| KR100973686B1 (en) * | 2008-06-23 | 2010-08-03 | 전자부품연구원 | Stator of coreless motor |
| US7913375B2 (en) * | 2009-01-19 | 2011-03-29 | Sergey Pulnikov | Method for making electrical windings for electrical machines and winding obtained by said method |
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| CN102801239A (en) * | 2012-09-06 | 2012-11-28 | 南车株洲电机有限公司 | Winding of motor and motor |
| CN105790540A (en) * | 2014-12-19 | 2016-07-20 | 上海鸣志电器股份有限公司 | Non-cogging motor with low-distortion winding |
| CN105762952A (en) * | 2016-04-11 | 2016-07-13 | 天津大学 | Low rotational inertia permanent magnet synchronous servo motor adopting four layer and short pitch distributed windings |
| CN207304205U (en) * | 2017-08-01 | 2018-05-01 | 上海鸣志电器股份有限公司 | Nested winding for non-gullet motor |
| CN207320983U (en) * | 2017-11-10 | 2018-05-04 | 广东威灵电机制造有限公司 | Stator and the motor with the stator |
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| CN110492647A (en) | 2019-11-22 |
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