14-pole motor armature winding structure and motor

Abstract

The utility model discloses a 14-pole motor armature winding structure, a wiring method and a motor, the 14-pole motor armature winding structure comprises double-layer wave windings arranged in 252 stator slots of the motor, and the double-layer wave windings comprise a U-phase winding, a V-phase winding and a W-phase winding; each group of windings comprises a first branch circuit, a second branch circuit, a third branch circuit and a fourth branch circuit, the first branch circuit and the third branch circuit are consistent in bar number and electrical angle, and the second branch circuit and the fourth branch circuit are consistent in bar number and electrical angle; the stator slot comprises an upper layer coil bar slot position and a lower layer coil bar slot position. According to the wiring method of the four-branch special balance branch in the embodiment of the invention, the law that the ratio of the number of magnetic poles to the number of the branches must be an integer is broken through, and the voltage difference between the branches of each phase is greatly reduced through the wiring method.

Description

Technical Field

[0001] The present application belongs to the technical field of motor equipment, and specifically relates to a 14-pole motor armature winding structure and a motor. Background Art

[0002] The turbine has an optimal operating speed under a certain head and power. Usually, the selection of turbine speed needs to consider the symmetry of the generator stator winding branch, which limits the selection of turbine speed. For example, for some large-capacity, high-speed units, the speed of 428.6r / min (14 poles) is the most suitable for pump turbines, but this speed corresponds to 14 poles of the motor, which will bring difficulties to the electromagnetic design of the motor in the traditional way.

[0003] Normally, the stator three-phase winding of a hydro-turbine generator or a generator motor (hereinafter referred to as a motor) is designed in a completely symmetrical way in terms of electromagnetics and physics, that is, the quotient of the number of magnetic poles divided by the number of stator winding branches must be an integer. For a 14-pole motor, the number of branches per phase of the stator winding must be 1, 2, 7 or 14 to achieve the requirement of symmetry or balance of each branch.

[0004] Since the number of branches determines the stator slot current, and the slot current basically determines important parameters of the motor, such as reactance, efficiency, and winding operating temperature, under certain capacity and rated voltage conditions, a branch number of 1, 2, 7, or 14 will make the stator slot current either too large or too small, which will not only make the electromagnetic design of the motor very difficult or the comprehensive parameters of the designed motor very inconsistent, but will also lead to an increase in the manufacturing cost of the motor. Summary of the invention

[0005] The embodiments of the present application provide a 14-pole motor armature winding structure and a motor, which can solve the wiring problem of the wiring method while ensuring performance.

[0006] In a first aspect, the purpose of the embodiments of the present application is to provide a 14-pole motor armature winding structure, including:

[0007] A double-layer wave winding is arranged in 252 stator slots of the motor, wherein the double-layer wave winding includes a U-phase winding, a V-phase winding and a W-phase winding;

[0008] Each winding group includes a first branch, a second branch, a third branch and a fourth branch, wherein the number of wire rods and the electrical angle of the first branch are consistent with those of the third branch, and the number of wire rods and the electrical angle of the second branch are consistent with those of the fourth branch;

[0009] The stator slots include upper wire rod slots and lower wire rod slots, the upper wire rod slots include a fourth upper slot, a fifth upper slot ... a ninth upper slot, and the lower wire rod slots include a first lower slot, a second lower slot ... a sixth lower slot;

[0010] When the slot difference between the upper layer slot and the lower layer slot of some wire bars of each branch is 3, the wire bars in the first lower slot, the second lower slot ... the sixth lower slot are sequentially connected to the wire bars in the corresponding fourth upper slot, the fifth upper slot ... the ninth upper slot by straight connection, wherein the winding pitch corresponding to the connection is 1-22-37;

[0011] When the slot difference between the remaining wire bars in the upper layer wire bar slots and the lower layer wire bar slots is 2 or 4, the wire bars remaining in the upper layer wire bar slots are connected to the wire bars in the corresponding lower layer wire bar slots by oblique connection, wherein the winding pitch corresponding to the connection is 1-21-37 or 1-23-37.

[0012] Furthermore, the remaining wire rods include a plurality of wire rods, a portion of the wire rods are arranged in the same upper layer wire rod slot, and another portion of the wire rods are arranged in the same lower layer wire rod slot.

[0013] Furthermore, the remaining wire rods include a plurality of the wire rods, wherein a portion of the wire rods are respectively arranged in different slots of the upper layer wire rods, and another portion of the wire rods are respectively arranged in different slots of the lower layer wire rods.

[0014] Furthermore, the number of winding turns of each of the wire rods is equal.

[0015] Furthermore, the U-phase winding, the V-phase winding, the W-phase winding, the -U-phase winding, the -V-phase winding and the -W-phase winding are each provided with 14 magnetic poles.

[0016] In a second aspect, the purpose of the embodiment of the present application is to provide a wiring method for an armature winding of a 14-pole motor, comprising:

[0017] The wire rods for winding the armature winding structure of 14-pole motors;

[0018] embedding 504 of the wire rods into 252 stator slots of the motor;

[0019] Performing wire-bar connection of the first branch of the V-phase winding based on the winding pitch, wherein the wire-bar connection mode of the third branch is consistent with the connection mode of the first branch;

[0020] Performing wire-bar connection of the second branch of the V-phase winding based on the winding pitch, wherein the wire-bar connection mode of the fourth branch is consistent with the connection mode of the second branch;

[0021] When the V-phase winding connection is completed, the wire rod connection of each phase branch of the U-phase winding and the W-phase winding is completed in sequence in the same manner.

[0022] Furthermore, the method further comprises:

[0023] Based on the 60° phase belt, the coils corresponding to the stator slots are sequentially divided into U-phase belt, V-phase belt, W-phase belt, -U-phase belt, -V-phase belt, and -W-phase belt, wherein the U-phase belt and the -U-phase belt are a group, the V-phase belt and the -V-phase belt are a group, and the W-phase belt and the -W-phase belt are a group;

[0024] Types of wire bar electrical angles are divided based on winding pitches, wherein the types of wire bar electrical angles include a first electrical angle, a second electrical angle, ... a ninth electrical angle, and the wire bar electrical angles of each group of phase belts are distributed in a consistent manner.

[0025] Furthermore, the method further comprises:

[0026] The wire rods in each phase belt are divided into branches so that each phase belt includes 4 branches, wherein the V phase belt includes a first branch and a second branch, the -V phase belt includes a third branch and a fourth branch, and each branch includes 42 wire rods.

[0027] Furthermore, the method further comprises:

[0028] Determine a pitch factor based on the target harmonics to be eliminated;

[0029] Based on the pitch coefficient, a winding pitch is determined, wherein the winding pitch is 1-22-37.

[0030] In a third aspect, an embodiment of the present application aims to provide a motor, comprising the 14-pole motor armature winding structure as described above.

[0031] Beneficial effects of this application:

[0032] The wiring method of the 4-branch special balanced branches in the embodiment of the present application breaks the law that the ratio of the number of poles to the number of branches must be an integer. This wiring method greatly reduces the voltage difference between each phase branch, so that the voltage difference between each phase branch is less than 0.067%, and the phase angle difference between branches is 0, thereby increasing the branch selection and rated voltage selection of the 14-pole motor, improving the flexibility of the motor design, and reducing the manufacturing cost of the motor and the construction cost of the power station.

[0033] At the same time, this wiring method has no long or short jumper wires, all are straight parallel heads and oblique parallel heads (1 slot), and there are no long or short inter-pole span (2 or more slots) connections. The end wiring is simple, the wiring is concise, and it is easy to implement in engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the armature winding structure of a motor according to an embodiment of the present application;

[0035] Figure 2 is a wiring block diagram of a wiring method according to an embodiment of the present application;

[0036] Figure 3 Schematic diagram of the arrangement of upper and lower wire bar slots of the motor armature winding structure according to an embodiment of the present application;

[0037] Figure 4 is a schematic diagram of a method for connecting the wire rods of the first branch of the V-phase winding of the motor armature winding structure according to an embodiment of the present application;

[0038] Figure 5 is a schematic diagram of a method for connecting the wire rods of the second branch of the V-phase winding of the motor armature winding structure according to an embodiment of the present application;

[0039] Figure 6 is a schematic diagram of another wire bar connection method of the first branch of the V-phase winding of the motor armature winding structure according to an embodiment of the present application;

[0040] Figure 7 It is a schematic diagram of another wire rod connection method for the second branch of the V-phase winding of the motor armature winding structure in an embodiment of the present application.

[0041] Reference numerals:

[0042] 1. Stator slot; 2. Upper wire rod slot; 3. Lower wire rod slot; 4. Straight parallel end; 5. Oblique parallel end. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0045] In the following, in combination with the accompanying drawings, a 14-pole motor armature winding structure, a wiring method and a motor provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0046] In a first aspect, an embodiment of the present application provides a 14-pole motor armature winding structure, such as Figure 1 and Figure 2 As shown, the 14-pole motor armature winding structure includes:

[0047] A double-layer wave winding is arranged in 252 stator slots 1 of the motor, and the double-layer wave winding includes a U-phase winding, a V-phase winding and a W-phase winding.

[0048] Each winding group includes a first branch, a second branch, a third branch and a fourth branch, wherein the number of wire rods and the electrical angle of the first branch are consistent with those of the third branch, and the number of wire rods and the electrical angle of the second branch are consistent with those of the fourth branch.

[0049] In the present application, the electrical angles are sequentially set to a first electrical angle, a second electrical angle, ... a ninth electrical angle, wherein the first electrical angle is represented by A1, the second electrical angle is represented by A2, and the other electrical angles are deduced in the same manner.

[0050] like Figure 3 As shown, the stator slot 1 includes an upper wire rod slot 2 and a lower wire rod slot 3, the upper wire rod slot 2 includes a fourth upper slot, a fifth upper slot ... a ninth upper slot, and the lower wire rod slot 3 includes a first lower slot, a second lower slot ... a sixth lower slot.

[0051] That is, the upper layer wire bars are arranged in slots corresponding to electrical angles A1-A6, with 14 wire bars arranged in each slot, and the lower layer wire bars are arranged in slots corresponding to electrical angles A4-A9, with 14 wire bars arranged in each slot.

[0052] like Figure 4As shown, when the slot difference between the upper wire bar slot 2 and the lower wire bar slot 3 of some wire bars of each branch is 3, the wire bars in the first lower slot, the second lower slot ... the sixth lower slot are connected to the wire bars in the corresponding fourth upper slot, the fifth upper slot ... the ninth upper slot in sequence through the straight connector 4, wherein the winding pitch corresponding to the connection is 1-22-37 (i.e., the slots corresponding to the electrical angle are A1-A4-A7).

[0053] In the present application, the slots of the first electrical angle A1 ... the sixth electrical angle A6 correspond to the first lower slot ... the sixth lower slot in sequence, and the slots of the fourth electrical angle A4 ... the ninth electrical angle A9 correspond to the fourth upper slot ... the ninth upper slot in sequence.

[0054] Specifically, the lower wire bar located at the first lower slot is distributed and connected with the upper wire bar located at the fourth upper slot, and such connections are all straight parallel head 4 connections. Similarly, the lower wire bar located at the second lower slot is distributed and connected with the upper wire bar located at the fifth upper slot, the lower wire bar located at the third lower slot is distributed and connected with the upper wire bar located at the sixth upper slot, the lower wire bar located at the fourth lower slot is distributed and connected with the upper wire bar located at the seventh upper slot, the lower wire bar located at the fifth lower slot is distributed and connected with the upper wire bar located at the eighth upper slot, and the lower wire bar located at the sixth lower slot is distributed and connected with the upper wire bar located at the ninth upper slot, and the winding pitch of these connections is all 1-22-37.

[0055] When the slot difference between the remaining wire bars in the upper wire bar slot 2 and the lower wire bar slot 3 of each branch is 2 or 4, the wire bars remaining in the upper wire bar slot 2 are connected to the wire bars in the corresponding lower wire bar slot 3 through the oblique joint 5, wherein the winding pitch corresponding to the connection is 1-21-37 or 1-23-37.

[0056] In the present application, the winding pitches are composed of three so-called long pitches of 1-21-37, 1-22-37, and 1-23-37, and the synthesized short pitch coefficient is still consistent with 1-22-37, which is 0.8333.

[0057] Furthermore, the remaining wire rods include a plurality of wire rods, a portion of the wire rods are arranged in the same upper wire rod slot 2 , and another portion of the wire rods are arranged in the same lower wire rod slot 3 .

[0058] Specifically, if Figure 4 and Figure 5As shown, in the first branch of the V-phase winding, when the slot difference between the remaining wire bars of each branch in the upper wire bar slot 2 and the lower wire bar slot 3 is 4, there are 3 remaining lower wire bars at the third lower slot, and there are 3 remaining upper wire bars at the seventh upper slot. The lower wire bars at the third lower slot are connected to the upper wire bars at the seventh upper slot. Such connection is an oblique parallel head 5 connection, and the winding pitch is 1-23-37.

[0059] In the second branch of the V-phase winding, when the slot difference between the remaining wire bars in the upper wire bar slot 2 and the lower wire bar slot 3 of each branch is 2, there are 3 lower wire bars remaining in the fourth lower slot, and there are 3 upper wire bars remaining in the sixth upper slot. The lower wire bars in the fourth lower slot are connected to the upper wire bars in the sixth upper slot. Such connection is an oblique parallel head 5 connection, and the winding pitch is 1-21-37.

[0060] Alternatively, the remaining wire rods include a plurality of wire rods, a portion of the wire rods are respectively arranged in different upper layer wire rod slots 2, and another portion of the wire rods are respectively arranged in different lower layer wire rod slots 3.

[0061] Specifically, if Figure 6 and Figure 7 As shown, in the first branch of the V-phase winding, there are 2, 1, and 1 lower-layer wire bars remaining at the second lower slot, the third lower slot, and the sixth lower slot, respectively, and there are 2, 1, and 1 upper-layer wire bars remaining at the fourth upper slot, the seventh upper slot, and the eighth upper slot, respectively. The lower-layer wire bar at the second lower slot is connected to the upper-layer wire bar at the fourth upper slot, the lower-layer wire bar at the third lower slot is connected to the upper-layer wire bar at the seventh upper slot, and the lower-layer wire bar at the sixth lower slot is connected to the upper-layer wire bar at the eighth upper slot. Such a connection is a slanted parallel head 5 connection.

[0062] In the second branch of the V-phase winding, there are 2, 1 and 2 lower-layer wire bars remaining at the first lower slot, the fourth lower slot and the fifth lower slot respectively, and there are 2, 1 and 2 upper-layer wire bars remaining at the fifth upper slot, the sixth upper slot and the ninth upper slot respectively. The lower-layer wire bar at the first lower slot is connected to the upper-layer wire bar at the fifth upper slot, the lower-layer wire bar at the fourth lower slot is connected to the upper-layer wire bar at the sixth upper slot, and the lower-layer wire bar at the fifth lower slot is connected to the upper-layer wire bar at the ninth upper slot. Such connection is a slanted parallel head 5 connection.

[0063] In this application, the wire bars on each branch only need to meet the quantity requirement of 42, and there is no restriction on the distribution quantity of the wire bars in the slots corresponding to different electrical angles. Therefore, after being connected through 4 straight parallel heads, the wire bar slots where the remaining wire bars are located are not limited, and the remaining quantity is also not limited. However, when connecting the remaining wire bars, the slot difference requirement of 2 or 4 must be met.

[0064] Furthermore, the number of winding turns of each of the wire rods is equal. The U-phase winding, V-phase winding, W-phase winding, -U-phase winding, -V-phase winding and -W-phase winding are all provided with 14 magnetic poles.

[0065] In a second aspect, the purpose of the embodiment of the present application is to provide a wiring method for an armature winding of a 14-pole motor, comprising:

[0066] Winding the wire rods of the armature winding structure of the 14-pole motor;

[0067] embedding 504 of the wire rods into 252 stator slots of the motor;

[0068] Performing wire-bar connection of the first branch of the V-phase winding based on the winding pitch, wherein the wire-bar connection mode of the third branch is consistent with the connection mode of the first branch;

[0069] Performing wire-bar connection of the second branch of the V-phase winding based on the winding pitch, wherein the wire-bar connection mode of the fourth branch is consistent with the connection mode of the second branch;

[0070] When the V-phase winding connection is completed, the wire rod connection of each phase branch of the U-phase winding and the W-phase winding is completed in sequence in the same manner.

[0071] When the wire rods are connected, the lower wire rod located at the first lower slot is distributed and connected with the upper wire rod located at the fourth upper slot, and such connections are all straight and parallel connections. Similarly, the lower wire rod located at the second lower slot is distributed and connected with the upper wire rod located at the fifth upper slot, the lower wire rod located at the third lower slot is distributed and connected with the upper wire rod located at the sixth upper slot, the lower wire rod located at the fourth lower slot is distributed and connected with the upper wire rod located at the seventh upper slot, the lower wire rod located at the fifth lower slot is distributed and connected with the upper wire rod located at the eighth upper slot, and the lower wire rod located at the sixth lower slot is distributed and connected with the upper wire rod located at the ninth upper slot.

[0072] Next, in the first branch of the V-phase winding, there are 3 remaining lower wire bars at the third lower slot and 3 remaining upper wire bars at the seventh upper slot, and the lower wire bars at the third lower slot are connected with the upper wire bars at the seventh upper slot. This connection is an oblique parallel connection, and the winding pitch is 1-23-37.

[0073] Similarly, complete some of the wire rods in the second branch of the V-phase winding that are connected by straight parallel connection. Then, in the second branch of the V-phase winding, there are 3 remaining lower wire rods at the fourth lower slot and 3 remaining upper wire rods at the sixth upper slot. Connect the lower wire rod at the fourth lower slot with the upper wire rod at the sixth upper slot. This connection is an oblique parallel connection, and the winding pitch is 1-21-37.

[0074] Furthermore, the method further comprises:

[0075] Based on the 60° phase belt, the coils corresponding to the stator slots are sequentially divided into U-phase belt, V-phase belt, W-phase belt, -U-phase belt, -V-phase belt, and -W-phase belt, wherein the U-phase belt and the -U-phase belt are a group, the V-phase belt and the -V-phase belt are a group, and the W-phase belt and the -W-phase belt are a group;

[0076] Types of wire bar electrical angles are divided based on winding pitches, wherein the types of wire bar electrical angles include a first electrical angle, a second electrical angle, ... a ninth electrical angle, and the wire bar electrical angles of each group of phase belts are distributed in a consistent manner.

[0077] Specifically, as shown in Table 1, the types of wire bar electrical angles are divided according to the winding pitch 1-22-37. There are 9 types of wire bar electrical angles for each phase, namely A1=0, A2=π / 18, A3=2π / 18, A4=3π / 18, A5=4π / 18, A6=5π / 18, A6=4π / 18, A8=7π / 18, A8=4π / 18.

[0078] Table 1 Distribution of the wire bars of the V-phase winding of the motor armature winding structure in the embodiment of the present application at the electrical angle

[0079]

[0080] Furthermore, the method further comprises:

[0081] The wire rods in each phase belt are divided into branches so that each phase belt includes 4 branches, wherein the V phase belt includes a first branch and a second branch, the -V phase belt includes a third branch and a fourth branch, and each branch includes 42 wire rods.

[0082] The electrical angle distribution of the wire bars of each phase is consistent, so only one phase (phase V) is taken as an example to determine the number of all wire bars under each electrical angle under phase V. The voltage difference and phase angle difference between the four branches of phase V are as small as possible to achieve balance between branches.

[0083] 1) There are countless combinations like this. To reduce the number of combinations, the number of wire rod combinations of the first branch V1 and the second branch V2 of the V-phase belt and the third branch V3 and the fourth branch V4 of the -V-phase belt is set to the first branch V1 being consistent with the third branch V3, and the second branch V2 being consistent with the fourth branch V4. In this way, only the first branch V1 and the second branch V2 need to be considered, and the number of combinations can be reduced by at least half.

[0084] 2) Different types of electrical angles, so that the number of wire rods with electrical angle A1 = the number of wire rod combinations with electrical angle A9, the number of wire rods with electrical angle A2 = the number of wire rod combinations with electrical angle A8, the number of wire rods with electrical angle A3 = the number of wire rod combinations with electrical angle A7, the number of wire rods with electrical angle A4 = the number of wire rod combinations with electrical angle A6, and the remaining wire rods are allocated to the electrical angle of A5.

[0085] 3) The difference in the number of electrical angle bars of the first branch V1 and the second branch V2 that are the same gradually increases from the minimum.

[0086] i) Set the number of bars of the first branch V1 at the first electrical angle A1 to be A9 = round down (14 / 2 / 2) = 3, and the number of bars of the second branch V2 at the first electrical angle A1 to be 14 / 2-3.

[0087] ii) The number of wire bars corresponding to the second electrical angle A2 to the fifth electrical angle A5 are selected using the same method as i).

[0088] iii) The sum of the number of bars at the first electrical angle A1 to the ninth electrical angle A9 is equal to 42.

[0089] IV) Calculate the branch voltage difference and phase angle difference.

[0090] An example of one of these combinations is shown in Table 2.

[0091] Table 2 Classification of wire rods of each branch of the V-phase winding of the motor armature winding structure of the embodiment of the present application

[0092]

[0093]

[0094] By classifying and combining the wire rods in Table 2, calculate the induced electromotive force of each branch, and substitute the values ​​in Table 2 into formula ①:

[0095]

[0096] Ann in formula ① satisfies formula ②:

[0097]

[0098] Find:

[0099]

[0100] It can be seen from formula ③ that the phase angle of each branch of the V phase (V1, V2, V3, V4) is 40°, that is, the phase difference is 0.

[0101]

[0102] Voltage difference between branches ΔV = 1.000333852-0.999666148 = 0.067%

[0103] Furthermore, the method further comprises:

[0104] Based on the target harmonics to be eliminated, a pitch coefficient is determined; based on the pitch coefficient, a winding pitch is determined, wherein the winding pitch is 1-22-37.

[0105] Specifically, from the perspective of eliminating harmonics and aiming at mainly eliminating the 5th and 7th harmonics, the optimal pitch coefficient is about 0.8333. From the perspective of reducing the length of the upper end of the stator wire bar and effectively utilizing the generator space, the connection pitch selects the first pitch Y1 as a long pitch connection, that is, the pitch is 1-22-37, and the pitch coefficient is β=2-Y1 / 3q=2-21 / (3×6)=0.8333.

[0106] On the third aspect, the purpose of the embodiment of the present application is to provide a motor, including the 14-pole motor armature winding structure as mentioned above, and also including at least a rotor, a motor shaft, an end cover, a bearing, an end cover plate and a terminal box.

[0107] The rotor is mounted on the motor shaft and can rotate. It usually uses windings or permanent magnets to interact with the stator magnetic field to generate electric power. The end caps cover both ends of the motor and are used to fix the stator and rotor and provide structural support for the motor. The end covers are covers installed at both ends of the motor to close the motor and protect the internal components. The junction box is a component that connects the motor armature winding to the external power supply. It is usually located on one side of the motor and is used to connect the power line.

[0108] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0109] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A 14-pole motor armature winding structure, characterized in that: include: A double-layer wave winding is arranged in 252 stator slots of the motor, wherein the double-layer wave winding includes a U-phase winding, a V-phase winding and a W-phase winding; Each winding group includes a first branch, a second branch, a third branch and a fourth branch, wherein the number of wire rods and the electrical angle of the first branch are consistent with those of the third branch, and the number of wire rods and the electrical angle of the second branch are consistent with those of the fourth branch; The stator slots include upper wire rod slots and lower wire rod slots, the upper wire rod slots include a fourth upper slot, a fifth upper slot ... a ninth upper slot, and the lower wire rod slots include a first lower slot, a second lower slot ... a sixth lower slot; When the slot difference between the upper layer slot and the lower layer slot of some wire bars of each branch is 3, the wire bars in the first lower slot, the second lower slot ... the sixth lower slot are sequentially connected to the wire bars in the corresponding fourth upper slot, the fifth upper slot ... the ninth upper slot by straight connection, wherein the winding pitch corresponding to the connection is 1-22-37; When the slot difference between the remaining wire bars in the upper layer wire bar slots and the lower layer wire bar slots is 2 or 4, the wire bars remaining in the upper layer wire bar slots are connected to the wire bars in the corresponding lower layer wire bar slots by oblique connection, wherein the winding pitch corresponding to the connection is 1-21-37 or 1-23-37.

2. The 14-pole motor armature winding structure according to claim 1, characterized in that: The remaining wire rods include a plurality of wire rods, a portion of which are arranged in the same upper layer wire rod slot, and another portion of which are arranged in the same lower layer wire rod slot.

3. The 14-pole motor armature winding structure according to claim 1, characterized in that: The remaining wire rods include a plurality of wire rods, wherein a portion of the wire rods are respectively arranged in different slots of the upper layer wire rods, and another portion of the wire rods are respectively arranged in different slots of the lower layer wire rods.

4. The 14-pole motor armature winding structure according to claim 1, characterized in that: The number of winding turns of each of the wire rods is equal.

5. The 14-pole motor armature winding structure according to claim 1, characterized in that: The U-phase winding, the V-phase winding, the W-phase winding, the -U-phase winding, the -V-phase winding and the -W-phase winding are each provided with 14 magnetic poles.

6. A motor, characterized in that: It comprises the 14-pole motor armature winding structure as claimed in any one of claims 1 to 5.

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