CN213693253U

CN213693253U - Motor stator

Info

Publication number: CN213693253U
Application number: CN202022760704.2U
Authority: CN
Inventors: 郭晓辉
Original assignee: Individual
Current assignee: Guangdong Zhonghuibao Energy Technology Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-07-13
Anticipated expiration: 2030-11-25

Abstract

The utility model provides a motor stator, it includes stator core, stator core includes a plurality of stator tooth's socket of arranging along circumference, and it has stator coil all to wind on each stator tooth's socket, stator coil is formed by the built-up conductor coiling, the built-up conductor includes group and total insulation layer, total insulation layer cladding in the surface of group, the group comprises stranded wire, stranded wire includes the bare conductor more than two strands, and adjacent bare conductor fully contacts. The utility model reduces the insulating layer of the stator winding, so that the space occupied by the thickness of the insulating layer in the stator slot is smaller, and the motor efficiency is improved; the off-line process is easier to complete; the conductors of the multi-strand wires are fully contacted, and the conducting effect of the wires is better; the possibility of defects caused by virtual connection and false connection due to the concentrated wiring in the original mode is avoided, and the winding quality is improved.

Description

Motor stator

Technical Field

The utility model belongs to the technical field of the motor, a motor stator is related to.

Background

The motor is composed of two main parts, namely a stator and a rotor. The stator is composed of a stator core and a stator coil wound on the stator core, and electric energy is converted into mechanical rotation energy between the stator and the rotor through a magnetic field. The stator coil is a conducting material winding which is insulated from each other, the insulating material winding is formed by winding a conducting wire coated with an insulating layer, and in the insulating winding, adjacent conducting wires are insulated from each other. The windings need to be loaded into the stator slots in the number specified by the specified position.

In some motor winding designs, the wire diameter of the winding is too thick, so that the difficulty of a wire prospecting process is improved, even the winding cannot be prospecting into a stator slot, the useless end packet head is too large, the wire prospecting quality is poor, and the slot filling rate is low. In order to improve the wire prospecting process, the winding wire diameter is converted into a plurality of strands of wires with insulating packages and the same cross section. Namely, the multi-strand insulated wire is used for replacing a large-diameter insulated wire with poor process performance, so that the process performance is improved, and winding exploration is realized.

However, the winding of multi-strand insulated wire creates new problems: 1. the thickness of the insulating layer of the multi-strand conducting wire with the insulating layer occupies space in the stator slot, so that the slot filling rate of the motor is influenced, the production process efficiency of the motor is influenced, and the yield of the motor is reduced; 2. the multi-strand insulated wire is a winding wire with insulation which replaces the design requirement of the equal section, and the multi-strand wires are in sufficient contact to realize the same sectional area, the same length and the same resistance. However, the prior art uses insulated wires that do not have sufficient contact between them. Influence the conductivity of the motor winding; 3. the end parts of the insulating material windings are intensively connected to form conductors which are fully contacted with each other, and the adopted process is welding machine or compression joint, so that virtual joint and false joint are easily brought to contact resistance, and huge hidden danger is brought to the performance and the quality of the motor; 4. vibration and temperature rise generated during the running of the motor can affect the conductivity of the multi-strand insulated wire, and hidden troubles such as unstable power output, increased pulsating moment, overhigh temperature rise and the like are brought to the loaded running of the motor; 5. the cost of the multi-strand insulated wire is higher than that of the single-strand insulated wire with the same cross section area.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned problem that prior art exists, provide a novel motor stator winding.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a motor stator, its includes stator core, stator core includes a plurality of stator tooth's sockets of arranging along circumference, all around having the stator coil on each stator tooth's socket, the stator coil is formed by the combined conductor coiling, the combined conductor includes group and total insulation layer, total insulation layer cladding in the surface of group, the group comprises stranded conductor, the stranded conductor includes more than two strands of bare conductors, and adjacent bare conductor fully contacts.

Preferably, the cross section of the conductor of the multi-strand wire is equal to the conductor sectional area of the stator coil required by design, or the total resistance of the multi-strand wire is equal to the resistance of the stator coil required by design under the condition of the same length.

Optionally, the multi-strand conductor further comprises one or more second conductors, the outer surfaces of the one or more second conductors are coated with an insulating layer, and the second conductors and the two or more bare conductors are coated in the total insulating layer together.

Preferably, the two or more bare wires have the same material and/or diameter.

Optionally, the two or more bare conductors have different materials and/or diameters.

Compared with the prior art, the utility model has the advantages as follows:

the utility model discloses there is the thicker wire of insulating layer with the big surface of diameter, replace into the mutual uninsulated bare conductor with the sectional area of stranded, then in the wire combination that these wires that connect in parallel constitute, accomplish the totality insulating, specifically be:

1, the thickness of the insulating layer is reduced, so that the space occupied by the thickness of the insulating layer in the stator slot is smaller, the slot filling rate of the motor is improved, and the motor efficiency is improved.

2, the off-line process is easier to complete;

and 3, the conductors of the multi-strand wires are fully contacted, and the conducting effect of the wires is better.

4, the possibility of defects caused by virtual connection and false connection due to concentrated wiring in the original mode is avoided, the winding quality is improved, and huge hidden dangers caused by the use process of the motor are avoided.

5, the process efficiency of motor production is greatly improved, and the process cost is reduced.

6, because the thickness of the insulating layer is reduced, the line surveying process is improved, the slot filling rate of the motor can be improved, and the length of the motor is reduced. Bare wires are inexpensive to manufacture, plus reduced motor length. Therefore, the cost of the motor is greatly reduced.

Drawings

Fig. 1 is a schematic cross-sectional view of a stator coil according to a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a stator coil according to a second embodiment of the present invention.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

The first embodiment is as follows:

the embodiment provides a motor stator, and it includes stator core, and stator core includes a plurality of stator tooth's socket of arranging along circumference, and it has stator coil all to wind on each stator tooth's socket, stator coil is formed by the combination wire coiling.

As shown in fig. 1, the wire group portion of the combined conductor is composed of a plurality of strands of bare conductors 1 which are not insulated from each other, and the plurality of strands of bare conductors 1 may be made of the same material, or different materials, and may have the same wire diameter or different wire diameters.

The outer surface of the combined conducting wire is set as a total insulating layer 2, and the total insulating layer 2 is coated on the outer surface of the wire set. Namely: the combined lead of the embodiment is formed by combining multiple strands of thin bare leads 1 which are made of the same or different materials and have the same or different wire diameters into a thick lead, the sectional area of the thick lead is the same as that of a single-turn conductor actually required by a winding, or the resistance of the thick lead is the same under the condition of the same length, and the outer surface of the thick lead is coated with a total insulating layer 2 to realize the integral insulation of the multiple strands of bare leads 1.

Example two:

as shown in fig. 2, the stator coil of this embodiment has 4 turns of windings, each turn of the thick wires for the windings is composed of 9 strands of wires, among the 9 strands of wires, 8 strands of bare wires 10 are provided, 1 strand of ordinary enameled wires 30 (the outer surface is covered with an insulating layer 31), the enameled wires 30 are located in the 8 strands of bare wires 10, the 9 strands of wires are all closely adjacent, and the thick wires are covered with a total insulating layer 20, so that the overall insulation is realized, and the outer surface of each turn of the windings is insulated by a total insulating surface. Namely: the insulated wire comprises 1 wire with an insulating layer, namely an enameled wire 30 and 8 bare wires 10, and is a thick wire with an outer surface coated with a total insulating layer 20.

Claims

1. The utility model provides a motor stator, its includes stator core, stator core includes a plurality of stator tooth's sockets of arranging along circumference, all around having the stator coil on each stator tooth's socket, its characterized in that, the stator coil is formed by the combined conductor coiling, the combined conductor includes group and total insulating layer, total insulating layer cladding in the surface of group, the group comprises stranded conductor, the stranded conductor includes more than two strands bare conductor, and adjacent bare conductor fully contacts.

2. The stator for an electric motor according to claim 1, wherein the conductors of the plurality of strands of wires have a cross section equal to a conductor sectional area of a stator coil required by design, or a total resistance of the plurality of strands of wires is equal to a resistance of the stator coil required by design, for the same length.

3. The stator as claimed in claim 1, wherein the multi-strand conductor further comprises one or more second conductors having an outer surface covered with an insulating layer, and the second conductors and the two or more bare conductors are collectively covered with the total insulating layer.

4. The stator of claim 1, wherein the two or more strands of bare conductors are of the same material and/or diameter.

5. The stator of claim 1, wherein the two or more strands of bare conductor are different in material and/or diameter.