CN113410934A

CN113410934A - Coil inserting structure and coil inserting method for alternating current motor winding

Info

Publication number: CN113410934A
Application number: CN202110719433.2A
Authority: CN
Inventors: 朱锡辉; 彭飞飞; 陈敬东; 万滨滨
Original assignee: Kangfu Technology Co ltd
Current assignee: Kangfu Technology Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-09-17
Anticipated expiration: 2041-06-28
Also published as: CN113410934B

Abstract

The invention discloses an alternating current motor winding inserting line structure and an inserting line method, wherein the alternating current motor winding inserting line structure comprises a stator core, the stator core is provided with 12 wire slots along the circumference, the stator core is provided with a three-phase winding, and the number of poles of a stator is 2; each phase winding of the three-phase winding comprises a first coil, a second coil, a third coil and a fourth coil which are sequentially connected in series; the pitches of the first coil, the second coil, the third coil and the fourth coil are all 4, the pitches are two thirds of the whole pitch, and the pitches, the shapes and the sizes of all the coils are the same; the first coil and the second coil form 1 polar phase group, the third coil and the fourth coil form 1 polar phase group, and the two polar phase groups are directly connected together through a connecting wire. Two polar phase groups of each phase are directly connected in series, and all coils of each phase are wound in a continuous mode, so that the number of coil outgoing lines is reduced, and welding is not needed.

Description

Coil inserting structure and coil inserting method for alternating current motor winding

Technical Field

The invention relates to the technical field of motors, in particular to a winding inserting structure and a winding inserting method of an alternating current motor.

Background

The motor pole groups are connected in series, and the connection is generally realized by welding. Welding increases process complexity and reduces motor production efficiency. For example, when the welding position is detached or the insulation is damaged, the motor is broken or short-circuited, so that the use of the motor and electric equipment is influenced, and even serious damage is caused.

On the development schematic diagram of the conventional winding, the polar phase group with the crossed outgoing lines is called a closed polar phase group, the polar phase group without the crossed outgoing lines is called an open polar phase group, and the polar phase groups of the conventional motor winding are arranged in sequence of the closed polar phase group and the open polar phase group alternately, so that the operation is inconvenient and easy to be wrong, and the winding is not easy to embed.

The motor windings with the conventional pitch are mostly connected in a star shape, and when the motor windings are connected in a triangle shape, circulating currents generated by harmonic electromotive force of 3 times and 3 times in a closed loop can cause additional loss and reduce the efficiency of the motor.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme:

the invention provides a winding inserting structure of an alternating current motor,

the stator comprises a stator core, wherein 12 wire slots are formed in the stator core along the circumference, the stator core is provided with a three-phase winding, and the number of poles of a stator is 2;

each phase winding of the three-phase winding comprises a first coil, a second coil, a third coil and a fourth coil which are sequentially connected in series;

the pitches of the first coil, the second coil, the third coil and the fourth coil are all 4, the pitches are two thirds of the whole pitch, and the pitches, the shapes and the sizes of all the coils are the same;

the first coil and the second coil form 1 polar phase group, the third coil and the fourth coil form 1 polar phase group, and the two polar phase groups are directly connected together through a connecting wire.

The number of the parallel branches of the windings is 1, and the windings can be connected in a star or triangle connection mode.

Preferably, a connection line between the second coil and the third coil is longer than a connection line between the first coil and the second coil, and a connection line between the second coil and the third coil is longer than a connection line between the third coil and the fourth coil.

Preferably, a first outgoing line is arranged at a first turn of the first coil of each of the three-phase windings, a second outgoing line is arranged at a second turn of the fourth coil of each of the three-phase windings, the outgoing lines form connection ends, and the connection ends may be connected in a star-shaped or triangular connection manner. .

Preferably, insulation paper is arranged between the edge of one phase coil and the edge of the other phase coil in the three-phase winding in the same wire slot.

A wire inserting method of a wire inserting structure of an alternating current motor winding comprises the following steps:

step 1: respectively sending a first coil of a first phase and a second coil of a second phase in the three-phase winding into corresponding wire grooves, and simultaneously hoisting the first coil of the first phase and the first coil of the second phase;

step 2: respectively sending the second edges of the first coil and the second coil of the second phase into corresponding wire slots, and simultaneously hoisting the first edges of the first coil and the second coil of the second phase;

and step 3: respectively sending the second edges of the first coil and the second coil of the third phase into corresponding wire slots, and simultaneously hoisting the first edges of the first coil and the second coil of the third phase; then, respectively dropping the first edges of the first coil and the second coil of the first phase into corresponding wire grooves;

and 4, step 4: respectively sending the first circles of the third coil and the fourth coil of the first phase into corresponding wire grooves, and simultaneously hoisting the second circles of the third coil and the fourth coil of the first phase; then, respectively dropping the first coil of the second phase and the first edge of the second coil into corresponding wire grooves;

and 5: respectively sending a third coil of a second phase and a first ring edge of a fourth coil into corresponding wire grooves, and simultaneously hoisting the third coil of the second phase and a second ring edge of the fourth coil; then, respectively dropping the first coil edge of the first phase and the first coil edge of the second phase into corresponding wire slots;

step 6: respectively sending a third coil of a third phase and a first ring edge of a fourth coil into corresponding wire grooves, and simultaneously hoisting a third coil of the third phase and a second ring edge of the fourth coil; then, respectively dropping a third coil edge of the first phase and a second coil edge of a fourth coil into corresponding wire grooves to finish first-phase wire embedding;

and 7: respectively dropping a third coil edge of the second phase and a second coil edge of the fourth coil into corresponding wire grooves to finish second-phase wire embedding;

and 8: and respectively dropping a third coil of the third phase and a second coil edge of the fourth coil into the corresponding wire grooves to finish the wire embedding of the third phase.

Preferably, the steps further comprise a step M, wherein the step M is a step M; and inserting a layer of insulating paper into each wire slot, wherein the insulating paper is arranged between two layers of coils in the same wire slot.

The invention has the beneficial effects

(1) Two polar phase groups of each phase are directly connected in series, and all coils of each phase are wound in a continuous mode, so that the number of coil outgoing lines is reduced, and welding is not needed.

(2) The arrangement sequence of the three-phase winding polar phase groups is 3 'closed' polar phase groups and 3 'open' polar phase groups in sequence, the coil inserting adopts the wire feeding, lifting and groove dropping, and the coil edge is connected with the previous coil inserting to complete the coil edge coil inserting, so that the coil inserting is simple and convenient, the winding is neat and compact, the coil end part cannot be shaped due to high lifting, and the coil inserting method saves the winding and coil inserting working hours.

(3) The winding of the invention adopts two thirds of pitches, 3 times and 3 times harmonic electromotive force do not exist in phase electromotive force and line electromotive force, and when the phase electromotive force and the line electromotive force are connected in a triangle, circulating current generated by the 3 times and 3 times harmonic electromotive force does not exist in a closed loop, thereby reducing loss and improving the efficiency of the motor.

Drawings

Fig. 1 is a schematic structural diagram of connection of a first coil, a second coil, a third coil, and a fourth coil in embodiment 1 of the present invention.

Fig. 2 is a schematic development view of the a-phase, B-phase, and C-phase windings of the three-phase winding in embodiment 1 of the present invention.

Fig. 3 is a schematic view of a star connection of a phase a, a phase B and a phase C of a three-phase winding in embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of delta connection of the a, B and C phases of the three-phase winding in embodiment 1 of the present invention.

Description of reference numerals: the generator stator slots are represented by Arabic numerals and comprise slots 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12; the polar phase group is represented by R1, R2, R3, R4, R5 and R6; the leading lines are represented by A, X, B, Y, C, Z, R14, R25, and R36.

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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, an embodiment 1 of the present invention discloses an ac motor winding insert structure including a stator core, the stator core is provided with a three-phase winding, the three-phase winding includes an a phase, a B phase, and a C phase, and the number of stator poles is 2; each phase winding of the three-phase winding comprises a first coil, a second coil, a third coil and a fourth coil which are sequentially connected in series; the pitches of the first coil, the second coil, the third coil and the fourth coil are all 4; and 12 wire grooves are arranged along the circumference of the stator core, and the numbers of the wire grooves are respectively 1-12.

The numbers of the slots in which the four coils of the phase B (first phase) of the three-phase winding are embedded are respectively No. 11-13, No. 12-4, No. 5-9 and No. 6-10, the numbers of the slots in which the four coils of the phase A (second phase) are positioned are respectively No. 1-5, No. 2-6, No. 7-11 and No. 8-12, and the numbers of the slots in which the four coils of the phase C (third phase) are positioned are respectively No. 3-7, No. 4-8, No. 9-1 and No. 10-2;

in this embodiment, the coils are directly connected, so that the connecting wires of the conventional coils are saved, welding is not required subsequently, uniform distribution of the coils on the stator core is ensured, the length of the connecting wire between the second coil and the third coil is greater than that of the connecting wire between the first coil and the second coil, and the length of the connecting wire between the second coil and the third coil is greater than that of the connecting wire between the third coil and the fourth coil.

In this embodiment, in the development schematic diagram of the winding, the polar phase group with crossed lead-out wires is referred to as a "closed" polar phase group, the polar phase group without crossed lead-out wires is referred to as an "open" polar phase group, and the 6 polar phase groups are arranged in the sequence of 3 "closed" polar phase groups and 3 "open" polar phase groups.

In the embodiment, the polar phase group R1 and the polar phase group R4 are directly connected in series to form a B-phase coil group (first phase), the lead-out line Y is led out from the slot 4, the lead-out line B is led out from the slot 10, the common lead-out line of the polar phase group R1 and the polar phase group R4 is R14, the lead-out line Y and the lead-out line R14 are crossed, the polar phase group R1 is called a "closed" polar phase group, the lead-out line B and the lead-out line R14 are not crossed, and the polar phase group R4 is called an "open" polar phase group; the polar phase group R2 and the polar phase group R5 are directly connected in series to form an A-phase coil group (a second phase), an outgoing line A is led out from the groove 6, an outgoing line X is led out from the groove 12, a common outgoing line of the polar phase group R2 and the polar phase group R5 is R25, the outgoing line A and the outgoing line R25 are crossed, the polar phase group R2 is called a 'closed-end' polar phase group, the outgoing line X and the outgoing line R25 are not crossed, and the polar phase group R5 is called an 'open-end' polar phase group; the polar phase group R3 and the polar phase group R6 are directly connected in series to form a C-phase coil group (a third phase), an outgoing line Z is led out from the groove 8, an outgoing line C is led out from the groove 2, a common outgoing line of the polar phase group R3 and the polar phase group R6 is R36, the outgoing line Z and the outgoing line R36 are crossed, the polar phase group R3 is called a 'closed-end' polar phase group, the outgoing line C and the outgoing line R36 are not crossed, the polar phase group R6 is called an 'open-end' polar phase group, 6 polar phase groups are sequentially arranged to be 3 'closed-end' polar phase groups and 3 'open-end' polar phase groups, namely R1, R2 and R3 are all 'closed-end' polar phase groups, and R4, R5 and R6 are all 'open-end' polar phase groups.

As shown in fig. 3, the first outgoing line a of the phase a and the second outgoing line X form a connection end of the phase a, the first outgoing line B of the phase B and the second outgoing line Y are connected to form a connection end of the phase B, the first outgoing line C of the phase C and the second outgoing line Z are connected to form a connection end of the phase C, and the connection end of the phase a, the connection end of the phase B, and the connection end of the phase C are connected in a star shape;

as shown in fig. 4, the phase connection end of the phase a, the phase connection end of the phase B, and the phase connection end of the phase C are connected into a triangle;

in this embodiment, a layer of insulating paper is inserted into each slot, and the insulating paper is disposed between two layers of coils located in the same slot to insulate the coils of different windings located in the same slot.

Example 2: coil inserting method for alternating current motor winding

The embodiment 2 of the invention also discloses a wire inserting method of the alternating current motor winding wire inserting structure based on the embodiment 1, which comprises the following steps:

step 1: respectively sending second edges of a first coil and a second coil of a phase B in the three-phase winding into a No. 12 slot and a No. 11 slot, and simultaneously hoisting the first edges of the first coil and the second coil of the phase B;

step 2: respectively sending second circles of the first coil and the second coil of the A phase in the three-phase winding into a No. 2 wire slot and a No. 1 wire slot, and simultaneously hoisting the first circles of the first coil and the second coil of the A phase;

and step 3: respectively sending second circles of the first coil and the second coil of the C phase in the three-phase winding into a No. 4 wire slot and a No. 3 wire slot, and simultaneously hoisting the first circles of the first coil and the second coil of the C phase; then, respectively dropping the first edges of the first coil and the second coil of the phase B into a No. 4 slot and a No. 3 slot;

and 4, step 4: respectively sending the first circles of the third coil and the fourth coil of the phase B into a No. 5 wire slot and a No. 6 wire slot, and simultaneously hoisting the second circles of the third coil and the fourth coil of the phase B; then, the first edges of the first coil and the second coil of the phase A fall into a No. 6 slot and a No. 5 slot respectively;

and 5: respectively sending the first edges of the third coil and the fourth coil of the phase A into a No. 7 wire slot and a No. 8 wire slot, and simultaneously hoisting the second edges of the third coil and the fourth coil of the phase A; then, respectively dropping the first edges of the first coil and the second coil of the phase C into a No. 8 slot and a No. 7 slot;

step 6: respectively sending the first edges of the third coil and the fourth coil of the C phase into a No. 9 wire slot and a No. 10 wire slot, and simultaneously hoisting the second edges of the third coil and the fourth coil of the C phase; then, respectively dropping a third coil edge of the phase B and a second coil edge of a fourth coil into a No. 9 wire slot and a No. 10 wire slot to finish the wire embedding of the phase B;

and 7: respectively dropping the third coil of the phase A and the second coil edge of the fourth coil into a No. 11 wire slot and a No. 12 wire slot to finish the wire embedding of the phase A;

and 8: and respectively dropping the third coil edge of the C phase and the second coil edge of the fourth coil into the No. 1 wire slot and the No. 2 wire slot to finish the wire embedding of the C phase.

In the embodiment 2, the arrangement sequence of 6 polar phase groups of the three-phase winding is 3 'closed' polar phase groups and 3 'open' polar phase groups in sequence, the coil inserting adopts wire feeding, lifting and groove dropping, and the coil edge is connected with the previous coil inserting to complete coil edge coil inserting, so that the coil inserting is simple and convenient, the winding is neat and compact, the coil end part cannot be raised and cannot be shaped, and the coil inserting method saves the working hours of wire winding and coil inserting;

in this embodiment 2, the method further includes step M, step M; and inserting a layer of insulating paper into each wire slot, wherein the insulating paper is arranged between two layers of coils in the same wire slot to insulate the coils of different windings in the same wire slot.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an alternating current motor winding rule structure which characterized in that:

2. An alternating current motor winding insert line structure according to claim 1, wherein:

the length of a connecting line of the second coil and the third coil is larger than that of a connecting line of the first coil and the second coil, and the length of a connecting line of the second coil and the third coil is larger than that of a connecting line of the third coil and the fourth coil.

3. An alternating current motor winding insert line structure according to claim 1, wherein:

and a first outgoing line is arranged on the first circle edge of the first coil of each phase winding in the three-phase windings, a second outgoing line is arranged on the second circle edge of the fourth coil of each phase winding in the three-phase windings, the outgoing lines form a connecting end, and the phase connecting ends can be connected in a star or triangle connection mode.

4. An alternating current motor winding insert line structure according to claim 1, wherein:

and insulating paper is arranged between the edge of one phase coil and the edge of the other phase coil in the three-phase winding in the same wire slot.

5. A wire inserting method based on the winding wire inserting structure of the alternating current motor as claimed in any one of claims 1 to 4, comprising the following steps:

6. A method of inserting a wire as claimed in claim 5, wherein:

the steps also include a step M, the step M; and inserting a layer of insulating paper into each wire slot, wherein the insulating paper is arranged between two layers of coils in the same wire slot.