CN113871160A - Magnetic bearing coil structure and winding method - Google Patents
Magnetic bearing coil structure and winding method Download PDFInfo
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- CN113871160A CN113871160A CN202110980314.2A CN202110980314A CN113871160A CN 113871160 A CN113871160 A CN 113871160A CN 202110980314 A CN202110980314 A CN 202110980314A CN 113871160 A CN113871160 A CN 113871160A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/076—Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a magnetic bearing coil structure and a winding method, comprising a first winding and a second winding, wherein the ends of the first winding and the second winding close to an inner ring are mutually communicated, the first winding and the second winding are respectively wound in a winding area in a reciprocating manner by taking a communicated part as a center according to opposite rotation directions, the ends for wiring at the tail ends of the first winding and the second winding are positioned outside the coil, the two ends are wound in opposite rotation directions by adopting a mode of independently winding from the inner ring to an outer ring by areas, and finally, the two ends are solidified and combined into a finished coil with the two ends both on the outer ring of the coil; the enameled wire does not need to be subjected to right-angle turning with a small curvature radius, and the situation of damage and short circuit can be avoided.
Description
Technical Field
The invention relates to the technical field of magnetic suspension bearing manufacturing, in particular to a magnetic bearing coil structure and a winding method.
Background
A magnetic bearing is an electromechanical integrated device that uses an electromagnetic field to support a rotating member. The device for generating the electromagnetic field is a coil formed by winding an enameled wire on the surface of an iron core; typically, a magnetic bearing set requires multiple coils to be mounted. The number, size and shape of the coils depend on the structural design of the magnetic bearing; magnetic bearing coils are typically prismatic or cylindrical. The coil can be roughly divided into two shapes according to the relationship between the axial length and the radial thickness of the coil, namely a long coil and a flat coil, wherein the axial length of the long coil is greater than the radial thickness, and the radial thickness of the flat coil is greater than the axial length.
In order to make the magnetic bearing compact, the windings of the coils are required to be as close as possible. Therefore, the coil is generally wound layer by layer from inside to outside in the winding process, and the coil can be neatly and tightly arranged by utilizing the tension of the enameled wire in the winding process by the winding process without loosening. However, the coil formed by winding is also required to have one end at the inner diameter edge of the coil and the other end at the outer diameter edge of the coil. In most magnetic bearings, it is desirable to have the terminals in the same location for wiring and insulation. It is therefore necessary to pass the thread end at the inner diameter of the coil, radially through the coil, to the outer diameter of the coil.
As shown in fig. 1 and fig. 2, taking 6 × 16 coils wound by enamel wire with a wire diameter D as an example, two coil structures and winding sequences are shown, and as can be easily seen from the above figures, the coil structure has two insurmountable drawbacks:
(1) the inner ring enameled wire needs to turn to the radial direction from the circumferential direction in a very small space, and the curvature radius is close to the wire diameter D. Therefore, the insulating layer of the enameled wire is easily damaged, and the coil is discarded due to the grounding short circuit.
(2) Enameled wires passing radially through the coil do not contribute to electromagnetic performance, but need to occupy a large coil space. Particularly for the flat coil with larger radial thickness, each layer only has 6 circles of enameled wires, but the axial length needs to reach 7D. Approximately 20% of the coil volume is wasted.
Disclosure of Invention
The technical purpose is as follows: aiming at the defects that the space utilization rate of the existing magnetic bearing coil is low and the insulating layer is easy to damage in a winding mode to cause short circuit, the invention discloses a magnetic bearing coil structure and a winding method, wherein two wire ends are positioned on the outer diameter of the coil, the space utilization rate is improved, and large-angle steering does not exist.
The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:
a magnetic bearing coil structure comprises a first winding and a second winding, wherein the ends of the first winding and the second winding, which are close to an inner ring, are mutually communicated and are respectively wound in a winding area in a reciprocating manner by taking the communicated parts as centers according to opposite rotation directions, and the ends of the first winding and the second winding, which are used for wiring, are positioned outside the coil.
The invention also provides a winding method based on the magnetic bearing coil structure, which comprises the following steps:
s01, manufacturing a winding tool to form an annular cavity for winding a coil, wherein the annular cavity is used as the outline of the magnetic bearing coil and is divided into two symmetrical winding areas, namely an area A and an area B, the area A is used for winding a first winding, and the area B is used for winding a second winding;
s02, placing an occupying tool in the area B, wherein the occupying tool is matched with the area B in shape, when the area A is wound, the area B occupies space, the enameled wire of the first winding is wound layer by layer from the inner layer to the outer layer in the area A along the same winding direction at the boundary position of the area A and the area B, and insulating paint is brushed between the adjacent layers;
s03, standing for several hours or heating in an oven after the first winding is wound until the first winding is initially solidified, and then removing the space occupying tool to make up a second winding space;
s04, winding the second winding layer by layer in the area B according to the direction opposite to the winding direction of the first winding, brushing insulating paint between adjacent layers, standing for several hours or heating in an oven until the second winding is primarily cured;
and S05, finally, performing the processes of paint dipping and heating curing on the coil, removing the winding tool after the coil is completely cured, and completing the winding of the coil, wherein the wire ends of the first winding and the second winding are both positioned on the excircle of the coil.
Preferably, the winding tool in step S01 of the present invention includes a first disk and a second disk concentrically arranged, the second disk is concentrically provided with a cylindrical boss at a side close to the first disk, and an annular cavity is formed between an outer surface of the cylindrical boss and an inner side surface of the first disk and the second disk.
Preferably, the space occupying tool in step S02 of the present invention is a hollow annular disc, the shape of the hollow annular disc matches with the shape of the second winding, the two-section design is adopted, the hollow annular disc is divided into two parts which are equal to each other from the symmetric center, and the two parts are clamped on the outer ring of the cylindrical boss in a splicing manner to occupy space.
Preferably, the hollow annular disc is provided with a wire slot for leading out a wire of the second winding on a matching surface with the annular cavity.
Has the advantages that: the magnetic bearing coil structure and the winding method provided by the invention have the following beneficial effects:
1. the invention adopts the mode that the inner rings of the double coils are mutually communicated and are wound according to opposite rotation directions, the two wire ends are both positioned at the outer ring, the wire ends do not need to be separately led out from the inner rings, and the volume of the coil is reduced by about 15 percent under the same winding condition.
2. The enameled wire insulating layer in the magnetic bearing coil is not easy to damage, the enameled wire in the coil does not need to make a 90-degree sharp turn in the narrow coil, and a wider space is provided for bending operation. Therefore, the insulating layer has small stress, and the probability of the ground insulation failure fault in winding, assembly and use is greatly reduced.
3. The magnetic bearing coil of the invention is convenient to assemble and lead wire connection, and the coil wire head is on the excircle, so that the magnetic bearing coil is convenient to operate in the subsequent magnetic bearing electric fitting and lead wire connection procedures, and the possibility of extruding the wire head and grinding the insulating layer of the magnetic bearing iron core is not required to be considered.
4. The two-end occupying tool is used, the installing is simple and convenient, the occupying tool is provided with the wire groove, the wire in the area B can be led out and fixed, the winding of the area A is not influenced, the structure is simple, the implementation effect is good, and the insulating layer of the enameled wire cannot be damaged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a diagram of two coil structures in the prior art;
FIG. 2 is a diagram illustrating a sequence of winding two coils according to the prior art;
FIG. 3 is a semi-sectional view of the winding tool of the present invention;
FIG. 4 is a sequence diagram of the first winding of the present invention;
FIG. 5 is a second winding sequence diagram in accordance with the present invention;
FIG. 6 is a winding pattern of the first and second windings of the present invention;
fig. 7 is a diagram of the coil structure of the present invention.
Detailed Description
The present invention will be more clearly and completely described below by way of a preferred embodiment in conjunction with the accompanying drawings, without thereby limiting the scope of the invention to the described embodiment.
Fig. 7 shows a magnetic bearing coil structure provided by the present invention, which is wound on a magnetic bearing, and includes a first winding 1 and a second winding 2, the ends of the first winding 1 and the second winding 2 near the inner ring are connected with each other, and are respectively wound in a winding area in a reciprocating manner with the connecting portion as the center according to opposite rotation directions, and the ends of the first winding 1 and the second winding 2 for connecting wires are located outside the coil.
The invention also provides a winding method based on the magnetic bearing coil structure, which comprises the following steps:
s01, manufacturing a winding tool to form an annular cavity for winding a coil, wherein the annular cavity is used as the outline of the magnetic bearing coil and is divided into two symmetrical winding areas, namely an area A and an area B, the area A is used for winding a first winding, and the area B is used for winding a second winding;
as shown in fig. 3, the winding tool comprises a first disc 3 and a second disc 4 which are concentrically arranged, a cylindrical boss 5 is concentrically arranged on one side of the second disc 4 close to the first disc 3, and an annular cavity 6 is formed between the outer surface of the cylindrical boss 5 and the inner side surfaces of the first disc 3 and the second disc 4;
s02, placing an occupying tool in the area B, wherein the occupying tool is matched with the area B in shape, when the area A is wound, the area B occupies space, the enameled wire of the first winding is wound layer by layer from the inner layer to the outer layer in the area A along the same winding direction at the boundary position of the area A and the area B, insulating paint is brushed between the adjacent layers, and the winding sequence is shown in fig. 4;
the occupation tooling structure is as shown in fig. 3, the occupation tooling is a hollow annular disc 7, the shape of the hollow annular disc is matched with that of the second winding, a two-section design is adopted, two parts which are equal to each other are divided from the symmetrical center, and occupation is carried out on the outer ring of the cylindrical boss 5 by the splicing mode card.
S03, standing for several hours or heating in an oven after the first winding is wound until the first winding is initially solidified, and then removing the space occupying tool to make up a second winding space;
s04, winding the second winding layer by layer in the area B according to the direction opposite to the winding direction of the first winding, brushing insulating paint between adjacent layers, standing for several hours or heating in an oven until the second winding is primarily cured, and winding the second winding from the inner layer to the outer layer in a reciprocating manner as shown in figure 5; the winding directions of the first winding and the second winding are shown in fig. 6.
And S05, finally, performing the processes of paint dipping and heating curing on the coil, removing the winding tool after the coil is completely cured, and completing the winding of the coil, wherein the wire ends of the first winding and the second winding are both positioned on the excircle of the coil.
The magnetic bearing coil structure is suitable for both long coils and flat coils, but the gain obtained when the magnetic bearing coil structure is used for the flat coils is the largest, so the flat coils are taken as an example in the following, the cross-sectional dimension of the conventional structural coil is at least 7D 16D and the cross-sectional dimension of the optimized structural coil is 6D 16D. Coil axial length reduces 1D after the configuration optimization, and the coil volume reduces 15%, when twining, the equipment of wire winding frock is carried out earlier, then pack into the space that occupies the B district that occupies the frock, coiling A coil and preliminary solidification after that, then demolish the occupation frock, coiling B coil and preliminary solidification, carry out the coil solidification and demolish the frock according to the normal technology of coiling magnetic bearing coil at last, two ends of a thread all are located the coil excircle, so that the follow-up wiring and insulation treatment.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (5)
1. A magnetic bearing coil structure is wound on a magnetic bearing and is characterized by comprising a first winding (1) and a second winding (2), wherein the ends of the first winding (1) and the second winding (2) close to an inner ring are mutually communicated and are respectively wound in a winding area in a reciprocating manner in opposite rotating directions by taking a communicating part as a center, and the ends of the first winding (1) and the second winding (2) at the tail ends for wiring are positioned outside the coil.
2. A method of winding a magnetic bearing coil structure according to claim 1, comprising the steps of:
s01, manufacturing a winding tool to form an annular cavity for winding a coil, wherein the annular cavity is used as the outline of the magnetic bearing coil and is divided into two symmetrical winding areas, namely an area A and an area B, the area A is used for winding a first winding, and the area B is used for winding a second winding;
s02, placing an occupying tool in the area B, wherein the occupying tool is matched with the area B in shape, when the area A is wound, the area B occupies space, the enameled wire of the first winding is wound layer by layer from the inner layer to the outer layer in the area A along the same winding direction at the boundary position of the area A and the area B, and insulating paint is brushed between the adjacent layers;
s03, standing for several hours or heating in an oven after the first winding is wound until the first winding is initially solidified, and then removing the space occupying tool to make up a second winding space;
s04, winding the second winding layer by layer in the area B according to the direction opposite to the winding direction of the first winding, brushing insulating paint between adjacent layers, standing for several hours or heating in an oven until the second winding is primarily cured;
and S05, finally, performing the processes of paint dipping and heating curing on the coil, removing the winding tool after the coil is completely cured, and completing the winding of the coil, wherein the wire ends of the first winding and the second winding are both positioned on the excircle of the coil.
3. The winding method of a magnetic bearing coil structure according to claim 2, wherein the winding tooling in the step S01 comprises a first disk (3) and a second disk (4) which are concentrically arranged, the second disk (4) is concentrically provided with a cylindrical boss (5) at a side close to the first disk (3), and an annular cavity (6) is jointly formed between the outer surface of the cylindrical boss (5) and the inner side surfaces of the first disk (3) and the second disk (4).
4. The winding method of the magnetic bearing coil structure according to claim 3, wherein the space occupying tool in the step S02 is a hollow annular disc (7), the shape of the hollow annular disc is matched with the shape of the second winding, the hollow annular disc is divided into two equal parts from the symmetrical center by adopting a two-stage design, and the two equal parts are clamped on the outer ring of the cylindrical boss (5) in a splicing manner to occupy space.
5. A method of winding a magnetic bearing coil structure according to claim 4, characterized in that the hollow annular disc (7) is provided with wire slots (8) on the mating surface with the annular cavity for leading out the wires of the second winding (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110980314.2A CN113871160A (en) | 2021-08-25 | 2021-08-25 | Magnetic bearing coil structure and winding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110980314.2A CN113871160A (en) | 2021-08-25 | 2021-08-25 | Magnetic bearing coil structure and winding method |
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| CN113871160A true CN113871160A (en) | 2021-12-31 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206363864U (en) * | 2016-12-20 | 2017-07-28 | 台达电子工业股份有限公司 | Coil windings |
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- 2021-08-25 CN CN202110980314.2A patent/CN113871160A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206363864U (en) * | 2016-12-20 | 2017-07-28 | 台达电子工业股份有限公司 | Coil windings |
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Application publication date: 20211231 |