A flux testing device with an internally filled multipole magnetic ring

Abstract

This utility model discloses a magnetic flux testing device with an internally filled multi-pole magnetic ring. It includes a base plate with a top plate connected to it. A test coil is mounted on the top plate, and two terminals are connected to the base plate. The leads of the test coil are connected to the terminals. The test coil includes an iron core with several pole teeth arranged in a ring array. The outer end face of each pole tooth has an arc-shaped structure, and the center of the arc coincides with the center of the iron core. Enameled wire is wound around the connecting arm of the pole teeth. During testing, the magnetic ring to be tested is placed around the test coil. Under the action of magnetic force, the magnetic ring automatically aligns with the pole teeth of the iron core, thereby reducing testing errors and ensuring the accuracy of the test results.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic flux testing technology, specifically relating to a magnetic flux testing device filled with a multi-pole magnetic ring. Background Technology

[0002] Multipole magnetic rings are widely used in high-precision micromotors in office equipment, smart homes, and drones, among other fields. Therefore, magnetic properties play a crucial role in motor performance. In the actual production of multipole magnetic rings, accurately testing the magnetic properties of the rings is particularly important for process control.

[0003] However, existing magnetic property testing devices for multi-pole magnetic rings with magnetized inner diameter suffer from poor accuracy and repeatability in practical applications. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic flux testing device with an internally filled multipole magnetic ring, thereby solving the problems mentioned in the background art. The magnetic flux testing device with an internally filled multipole magnetic ring provided by this invention has the characteristic of improving testing accuracy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a magnetic flux testing device with an internally filled multi-pole magnetic ring, comprising a base plate, a base connected above the base plate, a test coil mounted on the base, two terminals connected to the base plate, the lead wire of the test coil connected to the terminals, the test coil comprising an iron core, the iron core comprising a plurality of pole teeth arranged in a ring array, the outer end face of the pole teeth having an arc-shaped structure, and the center of the arc coinciding with the center of the iron core, and enameled wire wound on the connecting arm of the pole teeth.

[0006] Furthermore, the base plate is made of insulating material.

[0007] To facilitate the handling of the magnetic ring under test, a chamfer is further provided on the outer circle of the upper end of the iron core.

[0008] To prevent the wound enameled wire from extending beyond the top of the iron core, a groove is further provided at the top of the iron core.

[0009] To further limit the movement of the iron core, a limiting ring is provided at the lower end of the iron core. A circular hole is provided on the top surface of the base, and a countersunk hole communicating with the circular hole is provided on the bottom surface of the base.

[0010] To ensure stable gripping when the magnetic ring to be tested is removed, a boss is further provided on the top surface of the base.

[0011] Furthermore, the interior of the settling tank and the settling hole is filled with a filler layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. During testing, the magnetic ring to be tested is placed outside the test coil. Under the action of magnetic force, the magnetic ring to be tested and the pole teeth of the iron core are automatically aligned, thereby reducing test errors and ensuring the accuracy of test results.

[0014] 2. The outer circle of the upper end of the iron core of this utility model is chamfered, and the top surface of the base is provided with a boss. The surface finish of the outer end face of the pole teeth is <0.8, which facilitates the placement and removal of the magnetic ring to be tested and maintains the repeatability of the test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is a top view of the test coil of this utility model.

[0018] Figure 4 This utility model Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0019] Figure 5 This is a cross-sectional structural diagram of the base of this utility model.

[0020] In the diagram: 1. Test coil; 101. Iron core; 102. Enamelled wire; 103. Pole tooth; 104. Limiting ring; 105. Slot; 2. Base; 21. Boss; 22. Round hole; 23. Countersunk hole; 3. Base plate; 4. Terminal; 5. Magnetic ring under test; 6. Filler layer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figures 1-5This utility model provides the following technical solution: a magnetic flux testing device with an internally filled multi-pole magnetic ring, including a base plate 3, a base 2 connected above the base plate 3, the base 2 preferably being made of nylon, a test coil 1 mounted on the base 2, and two terminals 4 connected to the base plate 3, the leads of the test coil 1 being connected to the terminals 4, the test coil 1 including an iron core 101, the iron core 101 preferably being made of pure iron, but can also be 45# steel or A3 steel, the iron core 101 including several There are several pole teeth 103 arranged in a ring. The number of pole teeth 103 is the same as the number of poles of the magnetic ring 5 to be tested. The outer end face of the pole teeth 103 is an arc-shaped structure, and the center of the arc coincides with the center of the iron core 101. The radius of the arc is 1-3 mm smaller than the radius of the magnetic ring 5 to be tested. Enamelled wire 102 is wound on the connecting arm of the pole teeth 103. The diameter of the enamelled wire 102 is 0.5-1 mm, and the number of turns of the enamelled wire 102 on a single connecting arm is 10-20.

[0024] By adopting the above technical solution, during testing, the magnetic ring 5 to be tested is placed outside the test coil 1. Under the action of magnetic force, the magnetic ring 5 to be tested automatically aligns with the pole teeth 103 of the iron core 101. Then, the fluxmeter is zeroed, and the magnetic ring 5 to be tested is quickly pulled upwards away from the test coil 1. The magnetic flux value displayed on the fluxmeter is the magnetic flux value of the magnetic ring 5 to be tested. The following table shows the test data of this utility model:

[0025]

[0026] The test results show that the test error is less than 1%, which meets the requirements for magnetic property test error.

[0027] During testing, the magnetic ring 5 to be tested is placed outside the test coil 1. Under the action of magnetic force, the magnetic ring 5 to be tested is automatically aligned with the pole teeth 103 of the iron core 101, thereby reducing test errors and ensuring the accuracy of test results.

[0028] Specifically, the base plate 3 is made of insulating material, preferably insulating bakelite, but it can also be plexiglass or nylon.

[0029] Specifically, the outer circle at the upper end of the iron core 101 is chamfered with a radius of 0.5mm.

[0030] By adopting the above technical solution, it is convenient to pick up and put down the magnetic ring 5 to be tested.

[0031] Specifically, the upper end of the iron core 101 is provided with a sink 105.

[0032] By adopting the above technical solution, the wound enameled wire 102 is prevented from extending beyond the upper end of the iron core 101.

[0033] Specifically, the lower end of the iron core 101 is provided with a limiting ring 104, the top surface of the base 2 is provided with a round hole 22, the bottom surface of the base 2 is provided with a countersunk hole 23 communicating with the round hole 22, and the diameter of the limiting ring 104 is larger than the diameter of the round hole 22.

[0034] By adopting the above technical solution, the limiting ring 104 and the circular hole 22 are used to limit the iron core 101.

[0035] Example 2

[0036] The difference between this embodiment and embodiment 1 is that, specifically, a boss 21 is provided on the top surface of the base 2.

[0037] By adopting the above technical solution, it is ensured that the magnetic ring 5 to be tested can be stably grasped when it is taken out.

[0038] Example 3

[0039] The difference between this embodiment and embodiment 1 is that, specifically, the surface finish of the outer end face of the pole tooth 103 is <0.8.

[0040] By adopting the above technical solution, it is ensured that the resistance during the picking and placing of the magnetic ring 5 under test is sufficiently small.

[0041] Example 4

[0042] The difference between this embodiment and embodiment 1 is that, specifically, the interior of the sink 105 and the sink hole 23 is filled with a filling layer 6, which is a resin material.

[0043] By adopting the above technical solution, the main component of the filling layer 6 is epoxy resin adhesive, which is poured into the sink 105 and the sink hole 23 in a liquid state, and then baked into a solid filler. Its main function is to fix the winding and prevent the wire from vibrating due to instantaneous energization during magnetization. Another function is to provide insulation.

[0044] In summary, during testing, the magnetic ring 5 to be tested is placed outside the test coil 1. Under the action of magnetic force, the magnetic ring 5 automatically aligns with the pole teeth 103 of the iron core 101, thereby reducing testing errors and ensuring the accuracy of test results. The outer circumference of the upper end of the iron core 101 is chamfered, and the top surface of the base 2 is provided with a boss 21. The surface finish of the outer end face of the pole teeth 103 is <0.8, facilitating the placement and removal of the magnetic ring 5 and maintaining test repeatability.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetic flux testing device with a multi-pole magnetic ring inside, characterized in that: The device includes a base plate, a base connected to the top of the base plate, a test coil mounted on the base plate, and two terminals connected to the base plate. The leads of the test coil are connected to the terminals. The test coil includes an iron core, which includes several pole teeth arranged in a ring array. The outer end face of the pole teeth is an arc-shaped structure, and the center of the arc coincides with the center of the iron core. Enamelled wire is wound on the connecting arm of the pole teeth.

2. The magnetic flux testing device of claim 1, wherein: The base plate is made of insulating material.

3. The magnetic flux testing device of claim 1, wherein: The outer circumference at the upper end of the iron core is chamfered.

4. The magnetic flux testing device of claim 1, wherein: The upper end of the iron core is provided with a groove.

5. The magnetic flux testing device of claim 1, wherein: The lower end of the iron core is provided with a limiting ring.

6. The magnetic flux testing device of claim 4, wherein: The base has a circular hole on its top surface and a countersunk hole on its bottom surface that communicates with the circular hole.

7. The magnetic flux testing device of claim 1, wherein: The base has a boss on its top surface.

8. The magnetic flux testing device of claim 6, wherein: The interior of the settling tank and the settling hole is filled with a filling layer.

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