Amorphous motor stator winding tool with magnetic slot wedge

Abstract

The invention belongs to the technical field of magnetic suspension, and particularly relates to an amorphous motor stator winding tool with magnetic slot wedges, which comprises a tooth part positioning cylinder, the tooth part positioning cylinder is of a hollow cylindrical structure, the outer ring of the tooth part positioning cylinder is fixedly connected with a plurality of bumps, and the bumps are arranged at intervals along the circumferential direction of the tooth part positioning cylinder. The winding tool comprises a plurality of protruding blocks, each protruding block is detachably and fixedly connected with a magnetic slot wedge, a tooth portion positioning groove is formed between every two adjacent magnetic slot wedges and the corresponding protruding block, the shape of each tooth portion positioning groove is matched with the shape of one end of a tooth portion of an external amorphous motor stator, and one end of the tooth portion is inserted into the corresponding tooth portion positioning groove to be positioned and clamped. The structure is simple, machining is convenient, meanwhile, quick disassembly can be achieved during use, and production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic suspension, and in particular relates to an amorphous motor stator winding tool with magnetic slot wedges. Background Art

[0002] At present, magnetic levitation motors are widely used in fields such as precision control systems and automation equipment. However, under high-frequency excitation, the eddy current of the magnetic levitation motor core increases, the iron loss increases, and then the core overheats. The high temperature environment will accelerate the aging of the internal materials of the motor, and at the same time increase the vibration and noise of the magnetic levitation motor, shortening the service life of the motor. In order to reduce motor losses and curb heat generation, manufacturers usually use amorphous stator cores.

[0003] The invention patent with application number 202411035857.7 discloses a magnetic levitation motor stator core, wire embedding tooling and assembly method. The amorphous stator core is divided into a tooth part made of silicon steel sheet and a yoke part made of amorphous alloy. During production, the tooth part is first installed on the wire embedding tooling, and then the wire is wound. After the winding is completed, the yoke and the tooth part are assembled together. In order to ensure the installation position accuracy of the tooth structure, it is necessary to fill the connection between the yoke and the tooth part with magnetic epoxy glue, and remove the wire embedding tooling after the glue is cured. This design effectively solves the processing difficulties caused by the characteristics of amorphous alloy materials such as low stiffness, low stacking coefficient, high strength, and high brittleness after annealing. At the same time, it makes the space for winding work more open, which helps to maintain the consistency and standardization of winding.

[0004] However, the wire embedding tooling described in the invention has a complex structure, especially the special shape of the tooth pre-tightening groove, and the processing technology is cumbersome. At the same time, when using it, it is necessary to wait for the magnetic epoxy adhesive to be completely cured before removing the wire embedding tooling, which lengthens the work station cycle time and is not conducive to improving production efficiency. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide an amorphous motor stator winding tool with a magnetic slot wedge, which is divided into two parts: a tooth positioning cylinder and a magnetic slot wedge, so as to facilitate processing and disassembly.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A winding tool for an amorphous motor stator with a magnetic slot wedge comprises a tooth positioning cylinder, which is a hollow cylindrical structure. A plurality of protrusions are fixedly connected to the outer ring of the tooth positioning cylinder. The plurality of protrusions are arranged at intervals along the circumference of the tooth positioning cylinder. A magnetic slot wedge is detachably fixedly connected to each protrusion. A tooth positioning groove is formed between two adjacent magnetic slot wedges and the protrusion. The shape of the tooth positioning groove is adapted to the shape of one end of the tooth of an external amorphous motor stator. One end of the tooth is inserted into the tooth positioning groove for positioning and clamping.

[0007] The following is a further optimization of the above technical solution by the present invention: The magnetic slot wedge comprises two symmetrically arranged magnetic conductors, a non-magnetic body is arranged between the two magnetic conductors, and the non-magnetic body completely separates the two magnetic conductors.

[0008] Further optimization: the magnetic conductor is in the shape of a long strip with a C-shaped cross section, and the non-magnetic body is in the shape of a thin sheet.

[0009] Further optimization: the non-magnetic body is vertically connected to the bottom surface of the magnetic conductor, two grooves are formed on both sides of the non-magnetic body, and an adhesive body is fixedly arranged in the grooves.

[0010] Further optimization: The thickness of the non-magnetic body accounts for 1 / 10 of the total width of the magnetic slot wedge.

[0011] Further optimization: the shape of the protrusion is adapted to the shape of the stator slot of the external amorphous motor, and the number of the protrusion is the same as the number of the stator teeth of the external amorphous motor.

[0012] Further optimization: the outer diameter of the tooth positioning cylinder is the same as the inner diameter of the external amorphous motor stator, and the height of the tooth positioning cylinder is the same as the height of the external amorphous motor stator.

[0013] Further optimization: Add magnetic powder to the filler when filling the bonded body.

[0014] The present invention adopts the above technical solution and has the following beneficial effects: The winding tooling of the present invention adopts a split structure, has a simple structure, is more convenient to process, and does not need to wait for the rubber filled at the connection between the stator teeth and the yoke of the motor to be completely cured when the tooling is disassembled, which can save operation time and improve work efficiency. In the present invention, during the stator winding stage of the motor, the magnetic slot wedge is used as a part of the tooling, and the tooth portion of the motor stator is positioned and clamped by utilizing its appearance characteristics. After the winding is completed, the magnetic slot wedge is used as a part of the motor stator to improve the magnetic leakage between the teeth of the motor stator, so that the magnetic slot wedge is fully utilized. The magnetic slot wedge of the present invention adopts a structure combining magnetic conductive material and non-magnetic material, which can effectively suppress magnetic leakage between teeth, avoid the generation of loop eddy current, and reduce eddy current loss of the motor.

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the winding tool of the present invention; Figure 2 It is a schematic diagram of the appearance of the tooth positioning cylinder of the present invention; Figure 3 It is a schematic diagram of the appearance of the magnetic slot wedge of the present invention; Figure 4 is a cross-sectional view of a magnetic slot wedge of the present invention; Figure 5 It is a schematic diagram of the installation structure of the winding tool and the stator teeth of the present invention; Figure 6 A top view of the installation structure of the winding tool and the stator teeth of the present invention; Figure 7 It is a partial enlarged view of the stator teeth of the present invention; Figure 8 It is a schematic diagram of the winding state of the stator teeth of the present invention; Fig. 9 This is a schematic diagram of the stator structure of the amorphous motor of the present invention (after the tooling is removed).

[0017] In the figure: 1, tooth positioning cylinder; 2, protrusion; 3, magnetic slot wedge; 301, magnetic conductor; 302, non-magnetic body; 303, adhesive body; 4, tooth positioning slot; 5, tooth; 6, yoke; 7, stator slot; 8, notch. DETAILED DESCRIPTION

[0018] like Figure 1-3 As shown, an amorphous motor stator winding tool with a magnetic slot wedge includes a tooth positioning cylinder 1, which is a hollow cylindrical structure. The outer ring of the tooth positioning cylinder 1 is fixedly connected to a plurality of protrusions 2. The plurality of protrusions 2 are arranged at intervals along the circumference of the tooth positioning cylinder 1, and each protrusion 2 is detachably fixedly connected to a magnetic slot wedge 3.

[0019] In this embodiment, threaded holes are respectively provided near the two ends of the magnetic slot wedge 3, and threaded holes of the same specifications are also provided at positions on the protrusion 2 corresponding to the threaded holes of the magnetic slot wedge 3. The magnetic slot wedge 3 is fixedly connected to the protrusion 2 by bolts, and the threaded holes on the protrusion 2 penetrate the wall of the tooth positioning cylinder 1, so as to facilitate the disassembly and assembly of the bolts.

[0020] In addition to this embodiment, the connection method between the magnetic slot wedge 3 and the protrusion 2 can also adopt a detachable buckle or a sliding groove structure, so that the magnetic slot wedge 3 can be detachably fixed on the protrusion 2.

[0021] Depend on Figure 4 It can be seen that the magnetic slot wedge 3 includes two symmetrically arranged magnetizers 301, which are long strips with a C-shaped cross-section. A thin sheet-shaped non-magnetic body 302 is arranged between the two magnetizers 301. The non-magnetic body 302 is vertically connected to the bottom surface of the magnetizer 301 and completely separates the two magnetizers 301. Two trapezoidal grooves are formed on both sides of the non-magnetic body 302. An adhesive body 303 is fixed in the trapezoidal grooves. The thickness direction of the non-magnetic body 302 corresponds to the overall width direction of the magnetic slot wedge 3.

[0022] From the perspective of suppressing magnetic leakage, the larger the thickness of the non-magnetic body 302, the better the effect. However, from the perspective of suppressing tooth harmonics, the size is required to be as small as possible. Taking all factors into consideration, the performance is best when the thickness of the non-magnetic body 302 accounts for 1 / 10 of the total width of the magnetic slot wedge 3.

[0023] In this embodiment, the adhesive body 303 is filled with epoxy resin. The excellent adhesiveness and mechanical strength of epoxy resin are used to bond the magnetic body 301 and the non-magnetic body 302 together, and the overall structure of the magnetic slot wedge 3 is supported and strengthened.

[0024] In addition to this embodiment, the adhesive 303 may also be filled with phenolic resin or polyurethane to bond the components of the magnetic slot wedge 3 together and improve the strength of the overall structure.

[0025] In order to improve the overall magnetic permeability of the magnetic slot wedge 3 , magnetic powder may be added when filling the adhesive 303 .

[0026] In this embodiment, the magnetic conductor 301 is made of silicon steel material and is used to conduct the magnetic field. Because it has a high saturation magnetic flux density, it is beneficial to suppress magnetic field harmonics and reduce inter-tooth leakage.

[0027] In addition to this embodiment, the magnetic conductor 301 may also be made of one of other materials with high saturation magnetic flux density to conduct the relevant magnetic field.

[0028] In this embodiment, the non-magnetic body 302 is a glass fiber board, which has good insulation properties, so that the magnetic slot wedge 3 forms a larger magnetic resistance in the width direction, that is, the magnetic permeability of the magnetic slot wedge 3 in the width direction is much smaller than that in the height direction, thereby reducing the leakage magnetic field of the motor and suppressing the generation of circuit eddy current.

[0029] In addition to this embodiment, the non-magnetic body 302 may also be a carbon fiber board or an insulating fiber board made of other materials to increase the magnetic resistance of the magnetic slot wedge 3 in the width direction and improve the motor performance.

[0030] The winding tool of the present invention is suitable for an amorphous motor stator in which the tooth portion 5 and the yoke portion 6 are separately arranged. Figure 5-9 As shown, the outer diameter of the tooth positioning cylinder 1 is the same as the inner diameter of the motor stator, and the height of the tooth positioning cylinder 1 is the same as the height of the motor stator. After the magnetic slot wedge 3 is installed, a tooth positioning groove 4 is formed between two adjacent magnetic slot wedges 3 and the protrusion 2. One end of the tooth 5 is adapted to the shape of the tooth positioning groove 4. When in use, multiple teeth 5 are respectively inserted into the tooth positioning groove 4, and the tooth positioning groove 4 positions and clamps the teeth 5. At this time, the gap between the two teeth 5 is the stator slot 7, and the position of the notch 8 corresponds to the protrusion 2 on the tooth positioning cylinder 1.

[0031] After the tooth portion 5 is installed, the worker starts the winding operation from the end away from the notch 8 and gradually moves inward, so that the operating space is wider.

[0032] After the winding is completed, the yoke 6 and the tooth 5 are assembled together, and the magnetic epoxy glue is filled at the connection between the two. Since the magnetic slot wedge 3 plays a positioning role for the tooth 5, there is no need to wait for the magnetic epoxy glue to be completely cured to remove the bolts at the connection between the magnetic slot wedge 3 and the protrusion 2, and take out the tooth positioning cylinder 1 with the protrusion 2 to complete the disassembly of the tooling. This design can save the time of waiting for the magnetic epoxy glue to be completely cured, and can also ensure the positioning accuracy of the tooth 5.

[0033] After the tooth positioning cylinder 1 is taken out, the magnetic slot wedge 3 becomes a part of the motor stator. The magnetic slot wedge 3 closes the slot 8 into a nearly closed slot, suppresses tooth harmonics, and helps to improve the magnetic flux density waveform of the slot 8.

[0034] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. An amorphous motor stator winding tool with magnetic slot wedges, comprising a tooth positioning cylinder (1), characterized in that: The tooth positioning cylinder (1) is a hollow cylindrical structure. The outer ring of the tooth positioning cylinder (1) is fixedly connected to a plurality of protrusions (2). The plurality of protrusions (2) are arranged at intervals along the circumference of the tooth positioning cylinder (1). A magnetic slot wedge (3) is detachably fixedly connected to each protrusion (2). A tooth positioning groove (4) is formed between two adjacent magnetic slot wedges (3) and the protrusions (2). The shape of the tooth positioning groove (4) is adapted to the shape of one end of the stator tooth (5) of the external motor. One end of the tooth (5) is inserted into the tooth positioning groove (4) for positioning and clamping.

2. The amorphous motor stator winding tool with magnetic slot wedges according to claim 1 is characterized in that: The magnetic slot wedge (3) comprises two symmetrically arranged magnetic conductors (301), a non-magnetic body (302) is arranged between the two magnetic conductors (301), and the non-magnetic body (302) completely separates the two magnetic conductors (301).

3. The amorphous motor stator winding tool with magnetic slot wedges according to claim 2 is characterized in that: The magnetic conductor (301) is in the shape of a long strip with a C-shaped cross section, and the non-magnetic body (302) is in the shape of a thin sheet.

4. The amorphous motor stator winding tool with magnetic slot wedges according to claim 3 is characterized in that: The non-magnetic body (302) is vertically connected to the bottom surface of the magnetic conductive body (301), and two grooves are formed on both sides of the non-magnetic body (302), and an adhesive body (303) is fixedly arranged in the grooves.

5. The amorphous motor stator winding tool with magnetic slot wedges according to claim 4, characterized in that: The thickness of the non-magnetic body (302) accounts for 1 / 10 of the total width of the magnetic slot wedge (3).

6. The amorphous motor stator winding tool with magnetic slot wedges according to claim 5, characterized in that: The shape of the protrusion (2) is adapted to the shape of the stator slot (8) of the external motor, and the number of the protrusions (2) is the same as the number of the stator teeth (5) of the external motor.

7. The amorphous motor stator winding tool with magnetic slot wedges according to claim 6, characterized in that: The outer diameter of the tooth portion positioning cylinder (1) is the same as the inner diameter of the external motor stator, and the height of the tooth portion positioning cylinder (1) is the same as the height of the external motor stator.

8. The amorphous motor stator winding tool with magnetic slot wedges according to claim 7, characterized in that: When filling the bonded body (303), magnetic powder is added to the filler.

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