Multi-pole magnetizing tool

Abstract

A winding of the multi-pole magnetizing tool is formed by continuously distributing a plurality of winding wires in a wire slot, and the winding is configured to be distributed in a continuous and uniform n shape, so that when current passes through the winding, a first magnetic pole is formed on each n-shaped area of the winding, and a second magnetic pole is formed on each n-shaped area of the winding; a second magnetic pole opposite to the first magnetic pole in magnetism is formed between every two adjacent n-shaped areas, and meanwhile, the magnetic pole peak value P of the magnetized magnet to be magnetized corresponds to the distribution structure of the winding so as to accurately control the opening width a, the line distance b, the slot diameter c, the line diameter d and the pole distance e of the winding, so that fine regulation and control of magnetic field distribution are realized, and the symmetry of the magnetic poles is improved; the magnetic hysteresis and eddy-current loss are reduced, and each pole region of the to-be-magnetized magnet can obtain a more uniform magnetic field, so that the difference between a magnetic pole peak value and the pole width precision is reduced, and the performance of the to-be-magnetized magnet is improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetizing coils, and in particular to a multi-pole magnetizing tool. Background Art

[0002] When current passes through the magnetizing coil, a magnetic field is generated, thereby magnetizing the magnetized object to be set in the magnetizing coil. The Chinese patent with the announcement number CN 203733550 U discloses a multi-pole magnetizing coil, including a shell and a coil body fixedly set in the shell, the coil body includes 2n copper wires arranged vertically and evenly spaced, the outer side surface of the head end of the first copper wire is integrally connected with the outer side surface of the head end of the second copper wire, the outer side surface of the tail end of the second copper wire is integrally connected with the outer side surface of the tail end of the third copper wire, the outer side surface of the head end of the third copper wire is integrally connected with the outer side surface of the head end of the fourth copper wire, and so on, the outer side surface of the head end of the 2n-1 copper wire is integrally connected with the outer side surface of the head end of the 2n copper wire, and the intervals between each pair of three adjacent copper wires form a group of radial magnetic poles. The advantage is that the multi-pole coil is evenly polarized, which improves the uniformity of the surface magnetism of the coil.

[0003] However, the multi-pole magnetizing coil provided by the above scheme has a relatively complex winding scheme for the coil body, and cannot accurately control the specific layout structure between the copper wires, which easily leads to magnetic pole asymmetry and causes large differences in the magnetic pole peak values ​​of the magnet during the magnetization process.

[0004] Therefore, how to accurately arrange the winding structure of the magnetizing coil to ensure the symmetry of the magnetic poles generated by the magnetizing coil, so as to reduce the difference in the peak value of the magnetic poles after magnetization and improve the uniformity of the magnetic poles of the magnet has become an urgent problem to be solved in this field. Summary of the invention

[0005] In view of the defects of the prior art, the purpose of the present invention is to provide a multi-pole magnetizing tooling with better magnetic pole symmetry and capable of effectively reducing the difference in magnetic pole peak value and pole width accuracy after magnetization.

[0006] In order to achieve the above-mentioned object, the multi-pole magnetizing tool provided by the present invention comprises a mounting platform, a pole head arranged in the mounting platform, the pole head having a placement cavity, the pole head comprising a winding,

[0007] A plurality of wire slots are evenly distributed around the placement cavity, and the winding is composed of a plurality of windings continuously distributed in the wire slots, and a first magnetic pole and a second magnetic pole with opposite magnetic properties to the first magnetic pole are formed alternately around the placement cavity.

[0008] The opening width a, line pitch b, slot diameter c, line diameter d, pole pitch e of the winding and the peak value P of the magnetic pole after the magnetized object is magnetized in the winding are configured to be

[0009]

[0010] In the formula,

[0011] The opening width a is the opening width of the wire trough.

[0012] The line distance b is the distance from the outer edge of the winding to the outer edge of the magnet to be charged.

[0013] The groove diameter c is the diameter of the wire groove,

[0014] The wire diameter d is the winding diameter,

[0015] The pole distance e is the minimum distance between two adjacent wire slots.

[0016] The coefficient K is the magnetic material coefficient of the winding.

[0017] Furthermore, the windings and wire slots are configured to be matched with a single-turn distribution, each winding is configured to be distributed in a "J" shape, and the two end areas are respectively passed through adjacent wire slots, and the ends of two adjacent windings are respectively connected to each other after passing through the wire slots, so that the windings are distributed in a continuous and uniform "J" shape, and a first magnetic pole is formed on each "J" shaped area, and a second magnetic pole is formed between two adjacent "J" shaped areas.

[0018] Furthermore, the winding is configured such that the top corresponding to each "X"-shaped area is in an arc shape, and the bottoms of two adjacent "X"-shaped areas are connected at an angle.

[0019] Furthermore, the incoming wires and outgoing wires at both ends of the winding are led out from the incoming wire hole and the outgoing wire hole respectively to be connected to a magnetizing power source.

[0020] Furthermore, the first magnetic pole is an S pole, and the second magnetic pole is an N pole.

[0021] Furthermore, the tolerance of the groove diameter c is configured to be ±0.015 mm.

[0022] Furthermore, a water cooling channel is provided in the pole head, and the water cooling channel is arranged outside the winding.

[0023] Furthermore, the cooling water channel of the water-cooling channel and the shell of the pole head are an integrated structure.

[0024] Furthermore, the outer layer of the winding is coated with an insulating layer, and the insulating layer is composed of a polyimide film.

[0025] Furthermore, an insulating coating is provided on the surface of the wire trough.

[0026] Furthermore, the insulating coating is composed of a Teflon coating.

[0027] The multi-pole magnetizing tooling provided by the present invention has a winding composed of a plurality of windings continuously distributed in a wire slot, and when current passes through the winding, a first magnetic pole and a second magnetic pole with a magnetic property opposite to the first magnetic pole are arranged at the periphery of the cavity to form alternating distribution. At the same time, the magnetic pole peak value P of the magnetized object to be magnetized is made to correspond to the distribution structure of the winding, so as to accurately control the opening width a, wire pitch b, slot diameter c, wire diameter d and pole pitch e of the winding, thereby realizing fine regulation of the magnetic field distribution, so as to improve the magnetic pole symmetry, reduce hysteresis and eddy current losses, ensure that each pole region of the magnetized object to be magnetized can obtain a more uniform magnetic field, thereby reducing the difference between the magnetic pole peak value and the pole width accuracy, and improving the performance of the magnetized object to be magnetized. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Figure 1 A schematic diagram of the structure of the multi-pole magnetizing tooling provided by the present invention;

[0030] Figure 2 It is a schematic diagram of the unfolded structure of the winding in the present invention;

[0031] Figure 3 A schematic diagram of the current direction of the winding in the present invention;

[0032] Figure 4 It is a schematic diagram of the magnetic pole distribution of the magnetized body after magnetization in the present invention;

[0033] Figure 5 It is a schematic diagram of the distributed parameters of the winding in the present invention;

[0034] Figures 6a to 6c for Figure 5 A magnified image of

[0035] Figure 7 It is a schematic diagram of the magnetic field strength after the magnetized object is magnetized in the present invention.

[0037] 1. Mounting table; 2. Pole; 21. Wire inlet hole; 22. Wire outlet hole; 23. Shell; 3. Magnet to be charged; 4. Placement cavity; 41. Wire slot; 5. Winding; 51. Winding; 511. Head end; 512. Tail end; 513. "J"-shaped area; 5131. Top; 5132. Bottom; 52. Wire inlet; 53. Wire outlet; 6. Water cooling channel. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0039] See also Figure 1 , which shows an example of the multi-pole magnetizing tooling provided by the present invention.

[0040] As can be seen from the figure, the multi-pole magnetizing tooling of this example mainly includes a mounting table 1, a pole head 2 arranged in the mounting table 1, a placement cavity 4 for cooperating with the magnet to be charged 3 is formed in the pole head 2, and a winding 5 for magnetizing the magnet to be charged 3 is also provided in the placement cavity 4.

[0041] Among them, a plurality of wire slots 41 are evenly distributed on the periphery of the placement cavity 4, and the winding 5 is composed of a plurality of windings 51 continuously distributed in the wire slots 41, and a first magnetic pole and a second magnetic pole with magnetic properties opposite to the first magnetic pole are formed alternately distributed on the periphery of the placement cavity 4. At the same time, the magnetic pole peak value P of the magnetized object 3 after magnetization is made to correspond to the distribution structure of the winding 5, so as to accurately control the opening width a, wire pitch b, slot diameter c, wire diameter d and pole pitch e of the winding 5, so as to achieve fine regulation of the magnetic field distribution, so as to improve the magnetic pole symmetry, reduce hysteresis and eddy current losses, ensure that each pole region of the magnetized object 3 can obtain a more uniform magnetic field, thereby reducing the difference between the magnetic pole peak value and the pole width accuracy, and improving the performance of the magnetized object.

[0042] Furthermore, the winding 51 and the wire slot 41 are configured to be matched with a single-turn distribution, each winding 51 is configured to be distributed in a "J" shape, and the two end areas are respectively passed through adjacent wire slots 41, and the ends of two adjacent windings 51 are respectively passed through the wire slots 41 and then connected to each other, so that the winding 5 is distributed in a continuous and uniform "J" shape, so that when current passes through the winding 5, a first magnetic pole is formed on each "J" shaped area of ​​the winding 5, and a second magnetic pole is formed between two adjacent "J" shaped areas.

[0043] Specifically, the wire slots 41 are evenly distributed on the circumference of the placement cavity 4, so that a plurality of windings 51 are continuously distributed in the wire slots 41 and are distributed and enclosed around the circumference of the placement cavity 4, so that the winding 5 composed of the plurality of windings 51 is arranged on the periphery of the placement cavity 4, and the magnetized object 3 to be placed in the placement cavity 4 is evenly magnetized.

[0044] Combination Figure 2 In order to enable the winding 5 to form a uniform and symmetrical magnetic pole distribution, each winding wire 51 is bent and arranged in a "X" shape, and the head end 511 and the tail end 512 of the winding wire 51 respectively pass through the adjacent wire slots 41, and the head end 511 and the tail end 512 of two adjacent winding wires 51 are connected to each other, so that the ends of several winding wires 51 pass through the wire slots 41 and are connected to each other to form a current path.

[0045] Here, the winding 51 and the wire slot 41 are configured to be closely matched. The smaller the matching gap after installation, the higher the placement accuracy of the winding 4, and thus the higher the pole width accuracy of the magnetized body after magnetization.

[0046] In order to allow the winding 51 to pass smoothly through the wire slot 41 without being connected to the wire slot 41 , the outer layer of the winding 51 is coated with an insulating layer. At the same time, the surface of the wire slot 42 is provided with an insulating coating, so that the winding 51 can be wound smoothly and the service life of the winding 5 is improved.

[0047] Furthermore, a plurality of windings 51 are arranged in the wire slot 41 around the periphery of the placement cavity 4, so that the plurality of windings 51 enclose a winding 5. At the same time, the winding 5 is distributed in a continuous and uniform "J" shape. The top 5131 corresponding to each "J"-shaped area 513 is in an arc shape, and the bottoms 5132 of two adjacent "J"-shaped areas 513 are connected at an angle, so that the winding 5 is symmetrically distributed to form a symmetrical magnetic pole distribution.

[0048] Furthermore, the beginning of the first winding constitutes the incoming wire 52 of the winding 5 , and the end of the last winding constitutes the outgoing wire 53 of the winding 5 , so that the current flows through the incoming wire 52 through each winding 51 , and is finally output from the outgoing wire 53 , generating a magnetic field on the winding 5 .

[0049] Specifically, an inlet hole 21 and an outlet hole 22 are provided at the bottom of the pole head 2, and the main part of the winding 5 is arranged in the placement cavity 4. The inlet wire 52 and the outlet wire 53 at both ends are respectively led out from the inlet hole 21 and the outlet hole 22 to connect to the magnetizing power supply, so that the magnetizing power supply provides current to the winding 51. After the winding 51 is energized, a magnetic field is generated to magnetize the magnetized body 3.

[0050] Furthermore, when the winding 5 is energized, as the current changes and the direction of current transmission on the winding 51 changes, based on the principle of electromagnetism, a first magnetic pole will be formed on each "X"-shaped area 513 of the winding 51. At the same time, a second magnetic pole with opposite magnetic properties to the first magnetic pole will be formed between two adjacent "X"-shaped areas 513, thereby forming an alternating first magnetic pole and a second magnetic pole in the winding 5.

[0051] As an example, combining Figure 2 and Figure 3 The current enters the main part from the input line 52 of the winding 5, and flows along the "X"-shaped distribution of the winding 51. The direction of the current keeps changing, flowing through each "X"-shaped area 513, and finally flows out from the output line 53. Based on Ampere's law, in this example, the first magnetic pole formed on each "X"-shaped area 513 is the S pole, and the second magnetic pole formed between two adjacent "X"-shaped areas 513 is the N pole, thereby forming a continuous, uniform and alternating distribution of S poles and N poles on the winding 5.

[0052] Furthermore, the magnetic field formed by the winding 5 magnetizes the magnetized object 3 in the placement cavity 4. When the magnetic field strength formed by the winding 5 is sufficient to overcome the intrinsic coercive force of the magnetized object 3, the magnetizing power supply stops supplying power to the winding 5, so that the magnetic field formed by the winding 5 disappears, so that the magnetized object 3 retains residual magnetization, and magnetization is achieved. After magnetization, the magnetized object 3 has an alternating distribution of S poles and N poles corresponding to the magnetic field formed by the winding 5, as shown in FIG. Figure 4 shown.

[0053] Here, by adjusting the current direction of the winding 51 , the distribution of the S pole and the N pole can be adjusted, so as to adapt to the magnetic pole distribution of different magnetized bodies 3 to be charged.

[0054] Combination Figure 5 Furthermore, the distribution structure of the winding 5, such as the opening width a, line spacing b, slot diameter c, line diameter d and pole spacing e, and the constituent materials of the winding 5 will affect the efficiency, intensity and magnetic pole symmetry of the magnetic field generation, thereby affecting the magnetic pole peak value and pole width accuracy after magnetization of the magnetized body 3.

[0055] Among them, combined Figures 6a to 6c , the opening width a is the opening width of the wire slot 41. As the opening width a increases, the magnetic pole peak value P will show a trend of first increasing and then decreasing; the wire pitch b is the distance from the outer edge of the winding 51 to the outer edge of the magnetized body 3 to be charged. The smaller the wire pitch b is, the higher the magnetic pole peak value P will be; the slot diameter c is the diameter of the wire slot 41; the wire diameter d is the diameter of the winding 51; the pole pitch e is the minimum distance between two adjacent wire slots 41. As the pole pitch e decreases, the smaller the magnetic pole peak value P will be; the coefficient K is the magnetic material coefficient of the winding 5. The higher the performance level of the magnetic material of the winding 5 is, the higher the magnetic pole peak value P will be.

[0056] Furthermore, the outer layer of the winding 51 is coated with an insulating layer, and the thickness of the insulating layer can be obtained by the slot diameter c and the wire diameter d, that is, the thickness of the insulating layer = cd. At the same time, the thinner the insulating layer, the higher the magnetic pole peak value P.

[0057] Therefore, the distribution structure of the winding 5 will have a great influence on the magnetic pole peak value P of the magnetized object 3 after magnetization. In order to reduce the difference in magnetic pole peak value and pole width accuracy of the magnetized object 3 after magnetization, the specific distribution structure of the winding 5 needs to be precisely controlled to further improve the magnetic pole symmetry of the magnetic field formed by the winding 5, reduce hysteresis and eddy current losses, and ensure that each pole region of the magnetized object 3 can obtain a more uniform magnetic field.

[0058] Specifically, the opening width a, line pitch b, slot diameter c, line diameter d and pole pitch e of the winding 5 are continuously adjusted, and a corresponding test is performed with the magnetic pole peak value P after the magnetized object 3 is magnetized, so as to detect the corresponding relationship between the distribution structure of the winding 5 and the magnetic pole peak value P, thereby obtaining an empirical formula for the distribution structure of the winding 5, so that the distribution structure of the winding 5 matches the magnetic pole peak value P, and is configured as

[0059]

[0060] Preferably, the tolerance of the groove diameter c is configured to be ±0.015mm. As an example, in the specific operation process, high-precision wire-cutting slow-feeding processing equipment is used to process the groove diameter by cutting one and repairing three, ensuring that the tolerance of the groove diameter c meets ±0.015mm, thereby improving the accuracy of the groove diameter.

[0061] Therefore, the magnetic pole peak value P of the magnetized object 3 after magnetization is made to correspond to the distribution structure of the winding 5, so as to accurately control the opening width a, line pitch b, slot diameter c, line diameter d and pole pitch e of the winding 5, and adopt the coefficient K for correction, so as to achieve fine regulation of the magnetic field distribution, to improve the magnetic pole symmetry, to ensure that each pole region of the magnetized object 3 can obtain a more uniform magnetic field, thereby reducing the difference in the accuracy of the magnetic pole peak value and the pole width.

[0062] Furthermore, a water cooling channel 6 is provided in the pole head 2, and the water cooling channel 6 is arranged outside the winding 5, and the cooling water channel of the water cooling channel 6 and the housing 23 of the pole head 2 are an integrated structure, so that the cooling water channel is close to the winding 5, which can quickly reduce the heat generated by the discharge of the winding 5 and extend the service life of the winding 5. Compared with the traditional water cooling channel arranged on the water cooling housing outside the pole head 2, the water cooling channel 6 can take away the heat generated by the discharge of the winding 5 within 3 seconds, and can reduce the temperature of the winding 5 before each discharge to below 30°C.

[0063] The following examples illustrate the working process of the present invention in a specific application. It should be noted that the following content is only a specific application example of the present solution and does not constitute a limitation to the present solution.

[0064] Combine 5 to Figure 6c , and In order to obtain a larger magnetic pole peak value P, in this example, the wire spacing b of the winding 5 is minimized as much as possible. Considering the process limitations, the wire spacing b is 0.05mm; the wire diameter d is limited by the current withstand requirement and is 1.0m; in order to obtain a thinner insulating layer (cd), it is preferred to use an insulating layer composed of a polyimide film, and the thickness of the polyimide film is 0.04mm; then determine the coefficient K corresponding to the magnetic material of the winding 5.

[0065] Therefore, the slot diameter c can be calculated from the insulation layer (cd) and the wire diameter d, and the opening width a is (a-ea 2 ) function.

[0066] Combination Figure 2 and Figure 3In this example, the winding 51 is preferably distributed to form 12 "X"-shaped areas 513, the object 3 to be magnetized is placed in the placement cavity 4, the magnetization power supply supplies power to the winding 5, and 12 first magnetic poles and 12 second magnetic poles are formed in the winding 5 to magnetize the object 3 to be magnetized.

[0067] See also Figure 7 , which is a schematic diagram of the magnetic field strength after the magnetized body 3 is magnetized.

[0068] As can be seen from the figure, the maximum value of the magnetic pole peak after magnetizing the magnet 3 to be charged by the multi-pole magnetizing tooling is 209.6mt, the minimum value is 198mt, and the average value is 202.6. It can be obtained that the difference in the magnetic pole peak after magnetizing the magnet 3 to be charged is ±2%, the pole width accuracy is ±0.3°, the difference in the magnetic pole peak and pole width accuracy is small, and each pole region of the magnet 3 to be charged can obtain a more uniform magnetic field.

[0069] At the same time, the peak value extreme difference is about 10 mT. The smaller the peak value difference is, the smoother the operation of the magnetized body 3 to be charged is and the less noise is.

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-pole magnetizing tool, comprising a mounting platform, a pole head arranged in the mounting platform, the pole head having a placement cavity, the pole head including a winding, characterized in that: A plurality of wire slots are evenly distributed around the placement cavity, and the winding is composed of a plurality of windings continuously distributed in the wire slots, and a first magnetic pole and a second magnetic pole with opposite magnetic properties to the first magnetic pole are formed alternately around the placement cavity. The opening width a, line pitch b, slot diameter c, line diameter d, pole pitch e of the winding and the magnetic pole peak value P of the magnetized object after magnetization in the winding are configured as follows: In the formula, The opening width a is the opening width of the wire trough. The line distance b is the distance from the outer edge of the winding to the outer edge of the magnet to be charged. The groove diameter c is the diameter of the wire groove, The wire diameter d is the winding diameter, The pole distance e is the minimum distance between two adjacent wire slots. The coefficient K is the magnetic material coefficient of the winding.

2. The multi-pole magnetizing tooling according to claim 1, characterized in that: The windings and wire slots are configured to be matched with a single-turn distribution, each winding is configured to be distributed in a "+" shape, and the two end areas are respectively passed through adjacent wire slots, and the ends of two adjacent windings are respectively connected to each other after passing through the wire slots, so that the windings are distributed in a continuous and uniform "+" shape, and a first magnetic pole is formed on each "+" shaped area, and a second magnetic pole is formed between two adjacent "+" shaped areas.

3. The multi-pole magnetizing tooling according to claim 2, characterized in that: The winding is configured such that the top corresponding to each "X"-shaped area is in an arc shape, and the bottoms of two adjacent "X"-shaped areas are connected in an angled distribution.

4. The multi-pole magnetizing tooling according to claim 2, characterized in that: An inlet hole and an outlet hole are provided at the bottom of the pole head, and the inlet wires and outlet wires at both ends of the winding are respectively led out from the inlet hole and the outlet hole to connect to the magnetizing power supply.

5. The multi-pole magnetizing tooling according to claim 4, characterized in that: The first magnetic pole is an S pole, and the second magnetic pole is an N pole.

6. The multi-pole magnetizing tooling according to claim 1, characterized in that: The tolerance of the groove diameter c is configured to be ±0.015 mm.

7. The multi-pole magnetizing tooling according to claim 1, characterized in that: A water cooling channel is also provided in the pole head, and the water cooling channel is arranged outside the winding.

8. The multi-pole magnetizing tooling according to claim 7, characterized in that: The cooling water channel of the water-cooling channel and the shell of the pole head are an integrated structure.

9. The multi-pole magnetizing tooling according to claim 1, characterized in that: The outer layer of the winding is covered with an insulating layer, and the insulating layer is composed of a polyimide film.

10. The multi-pole magnetizing tooling according to claim 1, characterized in that: An insulating coating is provided on the surface of the wire trough.

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