Framework suitable for staggered splicing type right trapezoid cross section type magnetism gathering ring

Abstract

The invention provides a staggered splicing type right trapezoid section type magnetism gathering ring framework, a hollow trapezoid groove is used for installing a magnetism gathering ring, a splicing staggered trapezoid structure can release internal force in the vibration process, the magnetism gathering ring is prevented from deforming under impact, and it is guaranteed that the performance of a sensor is stable in the vibration and impact environment; the hollow part of the skeleton can reduce the interference of the skeleton on a magnetic field, and enables the magnetic flux to pass through the Hall element more intensively. And the staggered hollow part design of the magnetism gathering ring can ensure that heat generated when the product works can be dissipated along with air convection, so that the influence on the Hall element and the electrical performance due to over-high temperature is avoided.

Description

Technical Field

[0001] This invention belongs to the field of Hall current sensor technology, and in particular relates to a magnetic ring skeleton with a cross-section of a right-angled trapezoidal shape suitable for interlocking. Background Technology

[0002] A Hall current sensor is a current detection device. Aerospace equipment often operates in harsh environments with high temperatures, high-intensity shocks, and vibrations. Ordinary Hall current sensors cannot meet the requirements of aerospace-grade detection. Patents CN207472947U and CN205608061U disclose a closed-loop Hall current sensor, both with the secondary coil directly wound on a ring-shaped magnetic ring. A drawback of this design is that the winding is prone to detachment at the air gap under vibration. Patent CN208224339U discloses a current sensor frame and current sensor, featuring an arc-shaped channel frame. Its advantage is that the coil can be wound on the frame, improving sensor reliability. However, its disadvantage is that the Hall element needs to be blind-mounted in the center of the arc-shaped channel frame, resulting in complex assembly and poor positioning accuracy of the Hall element. Patent CN104931756B discloses a current sensor frame suitable for square interlocking magnetic cores. The magnetic ring is made up of two U-shaped magnetic cores spliced ​​together and connected to the two frames, which further improves the reliability of the sensor. The disadvantage is that the positioning accuracy of the two frames is poor when they are spliced ​​together, and the two spliced ​​frames and magnetic cores are prone to deformation and positional displacement under vibration. Summary of the Invention

[0003] The purpose of this invention is to provide a magnetic ring skeleton with an interlocking right-angle trapezoidal cross section, so as to solve the technical problem of poor performance of Hall current sensors in the prior art under high temperature, high-intensity impact and vibration environments.

[0004] Compared with existing technologies, the advantages of this invention are: 1) Enhanced mechanical stability: The trapezoidal opening structure enhances the mechanical connection between the frame and the magnetic core, ensuring that the magnetic core will not easily shift under vibration and impact environments, thus guaranteeing stable sensor performance; 2) Optimized magnetic circuit: The air gap in the middle reduces the interference of the frame on the magnetic field, allowing the magnetic flux to pass more concentratedly through the Hall element, improving the sensor's sensitivity and accuracy in detecting changes in the magnetic field; 3) Reduced weight: The amount of frame material used is reduced, reducing the overall weight, making it suitable for equipment with weight requirements, such as aerospace and portable testing equipment; 4) Facilitated heat dissipation: The hollow structure increases air circulation space, allowing the heat generated during operation to be dissipated through air convection, preventing excessive temperature from affecting the performance of the Hall element and circuit, and improving the stability and reliability of the sensor; 5) Reduced cost: Reduced material usage directly reduces raw material costs, while simplifying the production process and improving production efficiency, further reducing costs; 6) High positioning accuracy: The coaxial mounting of the magnetic core on the upper and lower parts of the frame ensures the consistency of the air gap position, width, and Hall element mounting height, improving the consistency and reliability of the Hall current sensor.

[0005] The skeleton of the present invention consists of two rectangular tubes. The square wire of the secondary coil is wound around the outside of the two long straight rectangular tubes. The two long straight rectangular tubes are connected by a raised outer frame in the middle. A rectangular groove is opened at the bottom, which is used to place and accurately position the Hall element. A wiring groove is opened on the side of the groove.

[0006] To facilitate heat dissipation, reduce weight, and maintain a certain level of rigidity, the top is designed with a symmetrical triangular boss structure, lower in the middle and higher on both sides, with a boss height of 0.7. The outer sides of the two rectangular tubes, each 11.4 mm long and 4.3 x 3.75 mm wide and high, have bosses measuring 8.15 x 7.3 x 0.75 mm, used to position the initial end of the secondary coil. Two small cylindrical positioning posts are located diagonally on both sides of the bottom, and two D0.5 positioning holes are located on the other diagonal. The frame, with the assembled core and secondary coil, is mounted on the printed circuit board via these positioning posts and holes, making the frame and the printed circuit board a single unit. The frame has a hollow trapezoidal slot in the center to accommodate interlocking magnetic rings. The hollow trapezoidal slot is 3.3 cm high, with a short side length of 2.35 cm and a long side length of 2.58 cm. The magnetic sheet thickness is 0.4 cm. Eight sheets are stacked together to form the interlocking magnetic ring. The hollow trapezoidal slot enhances the mechanical connection between the frame and the magnetic core, ensuring that the magnetic core will not easily shift under vibration and impact, thus guaranteeing stable sensor performance. Simultaneously, the hollow portion reduces the frame's interference with the magnetic field, allowing the magnetic flux to pass more concentratedly through the Hall element, improving the sensor's sensitivity and accuracy in detecting changes in the magnetic field. The outer sides of the two protrusions are inverted Z-shaped support bases, which, as extensions of the hollow trapezoidal slot, reinforce the magnetic ring.

[0007] The beneficial effects of this invention are as follows:

[0008] 1. In this invention, the magnetic ring is installed in the hollow trapezoidal groove of the skeleton. The vertical and inclined sides of the trapezoid can be used to accurately position the magnetic ring. The interlocking trapezoidal structure can release internal force during vibration, preventing the magnetic ring from deforming under impact, and ensuring the stability of sensor performance under vibration and impact environments.

[0009] 2. Compared to traditional skeleton structures, this invention significantly improves detection sensitivity and accuracy. The hollow portion of the skeleton reduces interference with the magnetic field, allowing magnetic flux to pass more concentratedly through the Hall element.

[0010] 3. Compared with the traditional magnetic ring skeleton structure, the present invention effectively suppresses temperature drift error. The design of the interlaced hollow part of the magnetic ring can ensure that the heat generated during the operation of the product can be dissipated with the air convection, avoiding the impact of excessive temperature on the performance of Hall element and circuit.

[0011] 4. The present invention has a simple assembly relationship, is lightweight, small in size and compact in dimensions, and is suitable for miniaturized application scenarios. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0013] Figure 1 This is a structural diagram of the skeleton according to an embodiment of the present invention;

[0014] Figure 2 This is a diagram of a hollow trapezoidal skeleton structure according to an embodiment of the present invention;

[0015] Figure 3 This is a cross-sectional view of the hollow skeleton according to an embodiment of the present invention;

[0016] Figure 4 This is a diagram of the magnetic sheet structure;

[0017] Figure 5 It is an interlocking right-angled trapezoidal cross-section magnetic ring;

[0018] Figure 6 This is the assembly drawing of the magnetic ring skeleton. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] This embodiment provides a magnetic ring skeleton suitable for interlocking right-angled trapezoidal cross-section, such as... Figure 1 The device consists of two rectangular tubes, each 11.4 mm long and 4.3 x 3.75 mm wide and high. The secondary coil's square conductor is wound around the outside of these two rectangular tubes. The two tubes are connected by a raised outer frame measuring 8.15 x 7.3 x 2.6 mm. A rectangular slot measuring 1.7 x 4.5 x 6.58 mm is located at the bottom for placing and precisely positioning the Hall element. Width grooves of 0.8 mm are cut along the sides of the slot. To facilitate heat dissipation, reduce weight, and maintain rigidity, the top is designed as a symmetrical triangular boss structure, lower in the middle and higher on both sides, with a boss height of 0.7 mm. The outer sides of the two 11.4 mm long and 4.3 x 3.75 mm rectangular tubes feature an 8.15 x 7.3 x 0.75 mm boss, used to position the initial end of the secondary coil. There are two small cylindrical positioning posts at the bottom diagonal positions on both sides, and two D0.5 positioning holes at the other diagonal position. The skeleton with the magnetic core and secondary coil assembled is installed on the printed circuit board through the positioning posts and positioning holes, so that the skeleton and the printed circuit board become a whole.

[0021] The skeleton has a hollow trapezoidal groove in the middle, such as Figure 2 As shown, a hollow trapezoidal groove with a height of 3.3 mm, a short side length of 2.35 mm, a long side length of 2.58 mm, and a magnetic sheet thickness of 0.4 mm is used to place the interlocking magnetic ring. Eight magnetic sheets are stacked together to form the interlocking magnetic ring. The magnetic sheet structure is as follows. Figure 4 As shown, the staggered interlocking right-angled trapezoidal cross-section magnetic ring is like... Figure 5 As shown. The hollow trapezoidal groove enhances the mechanical connection between the frame and the magnetic core, ensuring that the magnetic core will not easily shift under vibration and impact, thus guaranteeing stable sensor performance. Simultaneously, the hollow portion reduces the frame's interference with the magnetic field, allowing the magnetic flux to pass more concentratedly through the Hall element, improving the sensor's sensitivity and accuracy in detecting changes in the magnetic field. The outer sides of the two protrusions are inverted Z-shaped support seats, serving as extensions of the hollow trapezoidal groove and reinforcing the magnetic ring. A cross-sectional view of the hollow frame is shown below. Figure 3 As shown in the diagram. The assembly relationship of the magnetic ring skeleton is shown in the diagram. Figure 6 As shown.

[0022] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section, characterized in that, The frame consists of two rectangular tubes. The square wire of the secondary coil is wound around the outside of the two long straight rectangular tubes. The two long straight rectangular tubes are connected by a raised outer frame in the middle. A rectangular slot is opened at the bottom for placing and accurately positioning the Hall element. The top is a symmetrical triangular boss structure with a certain rigidity, which is lower in the middle and higher on both sides. The outer sides of the two rectangular tubes are bosses, which are used to locate the initial end position of the secondary coil.

2. The magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 1, characterized in that, There are two small cylindrical positioning posts at the bottom diagonal positions on both sides, and two positioning holes at the other diagonal position. The skeleton with the magnetic core and secondary coil assembled is installed on the printed circuit board through the positioning posts and positioning holes, so that the skeleton and the printed circuit board become a whole.

3. The magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 1, characterized in that, The rectangular groove has a wiring groove with a width of 0.8 on its side.

4. A magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 1, characterized in that, The frame has a hollow trapezoidal groove in the middle to accommodate interlocking magnetic rings.

5. A magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 4, characterized in that, The interlocking magnetic ring consists of eight magnetic sheets stacked together.

6. A magnetic ring skeleton suitable for interlocking right-angled trapezoidal cross-section according to any one of claims 1-5, characterized in that, The rectangular tube is 11.4 mm long, 4.3 mm wide, and 3.75 mm high.

7. A magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 1, characterized in that, The dimensions of the raised outer frame are 8.15 mm, 7.3 mm, and 2.6 mm, respectively.

8. A magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 4, characterized in that, The hollow trapezoidal groove has a height of 3.3 mm, a short side length of 2.35 mm, and a long side length of 2.58 mm.

9. A magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 2, characterized in that, The diameter of the positioning hole is 0.5 mm.

10. A magnetic ring skeleton with an interlocking right-angled trapezoidal cross-section as described in claim 1, characterized in that, The outer side of the boss is an inverted Z-shaped support seat, which serves as the extension of the hollow trapezoidal groove and strengthens the support for the magnetic ring.

Images