CN212063800U - Electric machine - Google Patents

Abstract

The utility model relates to a motor is equipped with a plurality of rotor core grooves on the rotor core of motor, is equipped with a plurality of commutator grooves on the commutator, and the commutator is provided with a plurality of commutator hooks in one side in the face of rotor core, and the enameled wire is around in commutator hook and rotor core groove, and the quantity of commutator hook is 1.5 times of the quantity in rotor core groove. Its advantages are: the turn-to-turn short circuit of the enameled wire is avoided; meanwhile, the commutation spark of the motor is improved.

Description

Electric machine

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor.

Background

At present, the number of hooks and the number of rotor slots of a commutator of a general series-excited motor are in integral multiple relation, such as a 12-hook commutator and a 12-slot rotor, or a 24-hook commutator and a 12-slot rotor, or a 36-hook commutator and a 12-slot rotor; the traditional structure design has simple winding process and easy realization.

However, in the winding process, under the condition that the space of the motor is limited, the space is not changed or is rarely changed but the number of hooks of the commutator needs to be increased, the increase of the number of hooks of the commutator causes the enameled wires between adjacent hooks to be easily subjected to turn-to-turn short circuit due to small space (the turn-to-turn short circuit refers to the fault of turn-to-turn short circuit caused by the abrasion and damage of coil insulation due to electromagnetic frequency doubling vibration between coils of the end winding of the stator), so that the performance and the service life of the motor are not up to the standard.

In summary, there is a need for a motor and a winding method thereof that can prevent adjacent enameled wires from being short-circuited.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

An object of the utility model is to provide a motor of difficult short circuit of adjacent enameled wire.

The utility model provides a motor, including rotor shaft, rotor core, commutator, enameled wire, rotor core with the commutator is located on the rotor shaft, be equipped with a plurality of rotor core grooves on the rotor core, be equipped with a plurality of commutator grooves on the commutator, the commutator in the face one side of rotor core is provided with a plurality of commutator hooks, the enameled wire wind around commutator hook with in the rotor core groove, its characterized in that, the quantity of commutator hook with the quantity in rotor core groove is not the integer multiple relation.

Further, the number of the commutator hooks is 1.5 times the number of the rotor core slots.

Further, the commutator hook includes a plurality of groups of commutator hooks, and every group of commutator hook includes first commutator hook, second commutator hook, third commutator hook in proper order, the rotor iron core groove includes a plurality of groups of rotor iron core grooves, and every group of rotor iron core groove includes first rotor iron core groove and second rotor iron core groove, and all circle enameled wires that walk around first commutator hook all walk around first rotor iron core groove, walk around half of the enameled wire of second commutator hook and walk around first rotor iron core groove, half of the other half is walked around second rotor iron core groove, walks around all circle enameled wires of third commutator hook all walk around second rotor iron core groove.

Further, the number of turns of the enameled wire in each slot of the rotor core slot is identical.

Furthermore, each hook of the commutator hook is hung with the enameled wire, and the number of turns of the enameled wire wound on the commutator hook is the same.

The first step is as follows: after the enameled wire is hung on a first commutator hook, winding a certain number of turns in a first rotor iron core groove;

the second step is that: the enameled wire is continuously hung on a second commutator hook, and the enameled wire is wound in the first rotor core slot for half of turns in the first step;

the third step: winding the enameled wire in the second rotor core slot by half of turns in the first step;

the fourth step: the enameled wire is hung on a third commutator hook and is wound in a second rotor core slot for a certain number of turns;

and the four steps are performed in a circulating manner until a commutator hook is hung finally.

The motor of the utility model only increases the hook number of the commutator properly without changing the structure of the existing motor product, and adopts the winding mode of the utility model when winding, and the enameled wire on the adjacent commutator hook avoids the turn-to-turn short circuit because of the larger distance; meanwhile, the commutation spark of the motor is improved; the production process is simplified, and the motor performance and the motor service life are improved.

Drawings

Fig. 1 is a first schematic structural diagram of a rotor shaft, a rotor core and a commutator of an electric machine provided by the present invention.

Fig. 2 is a schematic structural diagram ii of a rotor shaft, a rotor core, and a commutator of the motor provided by the present invention.

Fig. 3 is a simplified plan view of the winding and hooking process for a 12-slot rotor core for an 18-hook commutator.

The reference numerals and components referred to in the drawings are as follows:

1. rotor shaft

2. Rotor core

21. Rotor core slot

3. Commutator

31. Commutator groove

32. Commutator hook

4. Enameled wire

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Referring to fig. 1 and fig. 2, fig. 1 is a first schematic structural diagram of a rotor shaft, a rotor core, and a commutator of a motor according to the present invention, and fig. 2 is a second schematic structural diagram of a rotor shaft, a rotor core, and a commutator of a motor according to the present invention.

As shown in fig. 1 and 2, the motor includes a rotor shaft 1, a rotor core 2, a commutator 3, and an enamel wire 4 (see fig. 3); the middle part of the rotor shaft 1 is provided with a rotor iron core 2 and a commutator 3; rotor core slots 21 are uniformly distributed on the side surface of the rotor core 2; commutator grooves 31 are uniformly distributed on the side surface of the commutator 3, and commutator hooks 32 are arranged on the commutator 3 in the circumferential direction facing one end of the rotor core 2; the enamel wire 4 is wound around the commutator hook 32 and the rotor core slot 21.

It should be noted that the number of the commutator hooks 32 and the number of the rotor core slots 21 are not integer multiples; for example, a commutator having eighteen commutator hooks 32 fits a rotor core 2 having twelve rotor core slots 21, with the number of commutator hooks 32 and the number of rotor core slots 21 being 1.5 times greater. The number of turns of the enameled wire 4 in each slot of the rotor core slot 21 is completely the same; the enamel wire 4 is hung on each hook of the commutator hook 32, and the number of turns of the enamel wire 4 wound on each hook of the commutator hook 32 is the same.

In order to make the number of the commutator hooks 32 and the number of the rotor core slots 21 not be integer multiples, the number of turns of the enameled wire wound on each commutator hook 32 is kept consistent, and the number of turns of the enameled wire wound in each rotor core slot 21 is also kept consistent, the winding of the enameled wire 4 should satisfy the following conditions:

first, it is defined that the commutator hook 32 includes a plurality of groups of commutator hooks, each group of commutator hooks 32 includes a first commutator hook 32a, a second commutator hook 32b, and a third commutator hook 32c which are sequentially arranged along the circumferential direction of the commutator 3, that is, the number of the commutator hooks 32 is an integral multiple of 3, the rotor core slots 21 include a plurality of sets of rotor core slots, each set of rotor core slots includes a first rotor core slot 21a and a second rotor core slot 21b sequentially arranged along the circumferential direction of the rotor core 2, that is, the number of the rotor core slots 21 is an integral multiple of 2, wherein all turns of the enamel wire passing around the first commutator hook 32a pass around the first rotor core slot 21a, one half of the enamel wire passing around the second commutator hook 32b passes around the first rotor core slot 21a, the other half passes around the second rotor core slot 21b, and all turns of the enamel wire passing around the third commutator hook 32c pass around the second rotor core slot 21 b.

The specific winding steps are as follows:

the first step is as follows: after the enameled wire 4 is hung on the first commutator hook 32a, winding a certain number of turns in the first rotor core slot 21 a;

the second step is that: the enameled wire 4 is continuously hung on the second commutator hook 32b, and is wound in the first rotor core slot 21a for half of turns in the first step;

the third step: the enameled wire 4 hung on the second commutator hook 32b continues to wind in the second rotor core slot 21b for half of the turns in the first step;

the fourth step: the enameled wire 4 is hung on the third commutator hook 32c and wound in the second rotor core slot 21b for a certain number of turns;

the four steps are used for winding in a cycle until the last commutator hook 32 is hung.

The winding method of the present invention will be mainly described below by taking as an example a winding method of a motor rotor having a commutator with eighteen commutator hooks 32 and twelve rotor core slots 21.

Referring to fig. 3, fig. 3 is a simplified plan view of a 12-slot rotor core winding hook process for an 18-hook commutator.

Description of winding hooks of 18-hook commutator and 12-slot rotor core:

firstly, hanging a first commutator hook 32a, winding the commutator 3 neck, and winding 14 circles in the first rotor iron core groove 21 a;

secondly, the second commutator hook 32b is changed, and the commutator neck is wound, and 7 circles are wound in the first rotor core groove 21 a;

thirdly, 7 circles are wound in the second rotor core slot 21b without changing the hook but instead of changing the hook;

fourthly, the third commutator hook 32c is replaced, but the groove is not replaced, and 14 circles are wound in the second rotor core groove 21 b;

fifthly, circulating according to the steps 1, 2, 3 and 4, and performing the process of 14+7/7+ 14; and finally, hanging the tail wire on the opposite head hook.

Through the winding method, the motor can be realized by changing the commutator hooks 32 from 12 hooks to 18 hooks and changing the winding method under the condition that the space structure of the existing motor is not changed, such as the outer diameter height of the commutator 3, the outer diameter and the length of the commutator hooks 32, and the structures of parts such as motor brushes, brush sheaths, motor supports and the like are not changed, but the number of the commutator hooks is increased, and compared with a motor with a 24-hook commutator and a 12-slot rotor core, the changed motor has the advantages that the enameled wire interval between the adjacent commutator hooks is larger, and the turn-to-turn short circuit is not easily caused.

Based on the above description, the utility model discloses the advantage lies in:

1. the motor of the utility model only increases the hook number of the commutator properly without changing the structure of the existing motor product, and adopts the winding mode of the utility model when winding, so that the enameled wire on the hook of the adjacent commutator of the motor of the utility model avoids turn-to-turn short circuit due to larger distance; meanwhile, the commutation spark of the motor is improved.

2. The production process is simplified, and the motor performance and the motor service life are improved.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a motor, includes rotor shaft (1), rotor core (2), commutator (3), enameled wire (4), rotor core (2) with commutator (3) are located on rotor shaft (1), be equipped with a plurality of rotor core slots (21) on rotor core (2), be equipped with a plurality of commutator groove (31) on commutator (3), commutator (3) face one side of rotor core (2) is provided with a plurality of commutator hooks (32), enameled wire (4) wind around commutator hooks (32) with in rotor core slot (21), its characterized in that, the quantity of commutator hooks (32) with the quantity of rotor core slot (21) is not the integer multiple relation.

2. The machine according to claim 1, characterized in that the number of commutator hooks (32) is 1.5 times the number of rotor core slots (21).

3. The machine according to claim 1, characterized in that the number of commutator hooks (32) is an integer multiple of 3.

4. An electric machine according to claim 1, characterized in that the number of rotor core slots (21) is an integer multiple of 2.

5. The machine according to claim 1, wherein the commutator hooks (32) comprise several groups of commutator hooks, each group of commutator hooks (32) comprising, in order, a first commutator hook (32a), a second commutator hook (32b), a third commutator hook (32c), rotor iron core groove (21) include a plurality of groups rotor iron core groove, and every group rotor iron core groove includes first rotor iron core groove (21a) and second rotor iron core groove (21b), and all circle enameled wires that bypass first commutator hook (32a) all walk around first rotor iron core groove (21a), half of enameled wires that bypass second commutator hook (32b) walk around first rotor iron core groove (21a), half walk around second rotor iron core groove (21b), walk around all circle enameled wires of third commutator hook (32c) all walk around second rotor iron core groove (21 b).

6. An electric machine according to claim 1, characterized in that the number of turns of enameled wire (4) in each of the rotor core slots (21) is exactly the same.

7. The machine according to claim 1, characterized in that each of the commutator hooks (32) is provided with a wire (4), and the number of turns of the wire (4) wound on the commutator hooks (32) is the same.

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