Multi-channel resistor with low magnetic field interference

Abstract

The utility model discloses a multi-channel resistor with low magnetic field interference, which comprises a first connecting end, a second connecting end, a first conductive connecting piece, a second conductive connecting piece and a plurality of conductive pieces, wherein the first conductive connecting piece and the second conductive connecting piece extend along the transverse direction; one end of the first conductive connecting piece is connected with the first connecting end, the other end of the first conductive connecting piece extends in the direction close to the second connecting end in the transverse direction, the second conductive connecting piece and the first conductive piece are arranged at intervals in the longitudinal direction, and one end of the second conductive connecting piece is connected with the second connecting end; the plurality of conductive pieces are arranged in parallel along the transverse direction, each conductive piece comprises a first section and a second section which extend along the longitudinal direction, the first section and the second section are arranged at intervals along the transverse direction, one end of the first section is connected to the first conductive connecting piece, the other end of the first section is connected with one end of the second section, and the other end of the second section is connected with the second conductive connecting piece. And the other end of the second section is connected to the second conductive connecting piece.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to a low magnetic field interference multi-channel resistor. Background Technology

[0002] In traditional coaxial resistors, the input current flows in one direction. This design is susceptible to magnetic field interference to some extent, and the magnetic field generated by the current flow cannot be completely eliminated. This uncancelled magnetic field can lead to inaccurate measurements and increase the device's sensitivity to external interference. Because the generated magnetic field cannot be effectively canceled, traditional resistors are easily affected by external magnetic fields in high-precision measurements, resulting in inaccurate measurements.

[0003] The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0004] The main purpose of this invention is to provide a low magnetic field interference multi-channel resistor, which aims to solve the problem that resistors in the prior art are easily affected by external magnetic fields during high-precision measurement, resulting in inaccurate measurements.

[0005] To achieve the above objectives, this utility model provides a low magnetic field interference multi-path resistor, the low magnetic field interference multi-path resistor comprising:

[0006] First connection end and second connection end;

[0007] A first conductive connector and a second conductive connector extend laterally. One end of the first conductive connector is connected to a first connection end, and the other end extends laterally toward the second connection end. The second conductive connector and the first conductive connector are arranged longitudinally at intervals. One end of the second conductive connector is connected to the second connection end.

[0008] Multiple conductive elements are arranged side by side in a transverse direction. Each conductive element includes a first segment and a second segment extending in a longitudinal direction. The first segment and the second segment are arranged laterally at intervals. One end of the first segment is connected to the first conductive connector, and the other end of the first segment is connected to one end of the second segment. The other end of the second segment is connected to the second conductive connector.

[0009] Preferably, in the low magnetic field interference multi-path resistor, the other end of the first segment of each conductive element is connected to one end of its second segment by welding.

[0010] Preferably, in the low magnetic field interference multi-path resistor, a resistance element is detachably connected to the second segment.

[0011] Preferably, in the low magnetic field interference multi-path resistor, the second segment includes a first segment and a second segment, one end of the first segment is connected to the other end of the first segment, the other end of the first segment and one end of the second segment are respectively connected to the resistance element, and the other end of the second segment is connected to the second conductive connector.

[0012] Preferably, in the low magnetic field interference multi-channel resistor, the resistance element is a copper-manganese-tin masterbatch.

[0013] Preferably, in the low magnetic field interference multi-path resistor, the length of the first segment is less than the length of the second segment.

[0014] Preferably, in the low magnetic field interference multi-path resistor, one end of the first conductive connector is mounted on the first ceramic substrate;

[0015] One end of the second conductive connector is mounted on the second ceramic substrate.

[0016] Preferably, in the low magnetic field interference multi-path resistor, the first ceramic substrate and the second ceramic substrate are arranged to extend longitudinally.

[0017] Preferably, in the low magnetic field interference multi-path resistor, the number of multiple conductive elements is two, namely a first conductive element and a second conductive element.

[0018] Preferably, in the low magnetic field interference multi-path resistor, the first segment and the second segment are arranged in parallel;

[0019] The first and second segments are made of copper.

[0020] This utility model has at least the following beneficial effects:

[0021] The low magnetic field interference multi-channel resistor provided by this utility model has one end of the first conductive connector connected to the first connection end, and the other end extending laterally towards the second connection end. The second conductive connector and the first conductive connector are arranged longitudinally at intervals, and one end of the second conductive connector is connected to the second connection end. Multiple conductive connectors are arranged side by side laterally. Each conductive connector includes a first segment and a second segment extending longitudinally. The first segment and the second segment are arranged laterally at intervals. One end of the first segment is connected to the first conductive connector, and the other end of the first segment is connected to one end of the second segment. The other end of the second segment is connected to the second conductive connector. In this way, the magnetic fields between the multiple conductive connectors can cancel out at least a large part of them, which solves the problem that traditional resistors are easily affected by external magnetic field interference in high-precision measurement, resulting in inaccurate measurement.

[0022] Furthermore, in the first conductive element, the current flows upward in the first segment and downward in the second segment. According to the right-hand rule, the magnetic field at the first segment of the first conductive element is downward, and the magnetic field at the second segment is upward. This upward and downward magnetic field partially cancels out the magnetic field. Similarly, in the second conductive element, the current flows upward in the first segment and downward in the second segment. Again, according to the right-hand rule, the magnetic field at the first segment of the second conductive element is downward, and the magnetic field at the second segment is upward. This upward and downward magnetic field partially cancels out the magnetic field. Additionally, in adjacent first and second conductive elements, the current flows downward in the second segment of the first conductive element and upward in the first segment. This upward and downward magnetic field further cancels out the magnetic field, resulting in a smaller magnetic field between the first and second conductive elements. Therefore, using multiple conductive elements can help cancel out the magnetic field generated by the current in the resistor element region, thereby improving the accuracy of current measurement. Attached Figure Description

[0023] Figure 1 A schematic diagram of an embodiment of the low magnetic field interference multi-path resistor provided by this utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the current flow in a multi-path resistor subjected to medium and low magnetic field interference.

[0025] Serial Number name Serial Number name 100 Low magnetic field interference multi-channel resistor 5 conductive components 1 First connection end 51 First paragraph 11 Take current connection point 52 Second paragraph 12 Take voltage connection point 521 First segment 2 Second connection end 522 Second segment 21 Take current connection point 6 Resistance components 22 Take voltage connection point 7 First ceramic substrate 3 First conductive connector 8 Second ceramic substrate 4 Second conductive connector

[0026] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0028] In this embodiment of the invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0030] In this embodiment of the invention, the term "multiple" refers to two or more, and other quantifiers are similar.

[0031] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0032] In traditional coaxial resistors, the input current flows in one direction. This design is susceptible to magnetic field interference to some extent, and the magnetic field generated by the current flow cannot be completely eliminated. This uncancelled magnetic field can lead to inaccurate measurements and increase the device's sensitivity to external interference. Because the generated magnetic field cannot be effectively canceled, traditional resistors are easily affected by external magnetic fields in high-precision measurements, resulting in inaccurate measurements.

[0033] Traditional resistors, when current flows through them, may experience uneven heat distribution due to the interaction between the magnetic field and the current, thus affecting the resistor's stability and lifespan. Furthermore, traditional resistor designs typically require complex manufacturing processes, resulting in high production costs. Variations during the manufacturing process are difficult to control, and the complex assembly processes and stringent material handling lead to high production costs and long lead times.

[0034] This invention provides a low-magnetic-field-interference multi-path resistor, such as... Figure 1 and Figure 2 As shown, the low magnetic field interference multi-path resistor 100 includes a first connection terminal 1 and a second connection terminal 2, a first conductive connector 3 and a second conductive connector 4 extending laterally, and a plurality of conductive elements 5 arranged side by side laterally. One end of the first conductive connector 3 is connected to the first connection terminal 1, and the other end extends laterally towards the second connection terminal 2. The second conductive connector 4 and the first conductive element 5 are spaced apart longitudinally, and one end of the second conductive connector 4 is connected to the second connection terminal 2. The plurality of conductive elements 5 arranged side by side laterally each includes a first segment 51 and a second segment 52 extending longitudinally. The first segment 51 and the second segment 52 are arranged laterally spaced apart. One end of the first segment 51 is connected to the first conductive connector 3, and the other end of the first segment 51 is connected to one end of the second segment 52. The other end of the second segment 52 is connected to the second conductive connector 4.

[0035] This invention, by providing multiple conductive elements 5, allows the magnetic fields between the multiple conductive elements 5 to cancel out at least a large portion. Specifically, as shown... Figure 2As shown, the current flows through the first connection terminal 1, through the first conductive connector 3, into the conductive connector 5, then through the second conductive connector 4, and out from the second connection terminal 2. Figure 2 The current passing through the first segment 51 is set upwards, and the current passing through the second segment 52 is set downwards. According to the right-hand rule, the magnetic field at the first segment 51 is downwards, and the magnetic field at the second segment 52 is upwards. In this way, the upward and downward magnetic fields can cancel each other out.

[0036] The number of conductive elements 5 can be at least two. Taking two conductive elements 5 as an example, the two conductive elements 5 are the first conductive element 5 and the second conductive element 5. The current flows through the first connecting end 1, through the first conductive connector 3, then through the first segment 51 and the second segment 52 of the first conductive element 5, and the first segment 51 and the second segment 52 of the second conductive element 5, and then flows out from the second conductive connector 4. More specifically, the first segment 51 and the second segment 52 are arranged in parallel, and both the first segment 51 and the second segment 52 are arranged perpendicular to the first conductive connector 3 and the second conductive connector 4. The first conductive connector 3 and the second conductive connector 4 are arranged in parallel. The first conductive connector 3 and the second conductive connector 4 can be, but are not limited to, made of copper.

[0037] It should be noted that in the first conductive element 5, the current in the first segment 51 flows upward, while the current in the second segment 52 flows downward. According to the right-hand rule, the magnetic field at the first segment 51 of the first conductive element 5 flows downward, and the magnetic field at the second segment 52 flows upward. This upward and downward magnetic field partially cancels out the magnetic field. Similarly, in the second conductive element 5, the current in the first segment 51 flows upward, and the current in the second segment 52 flows downward. Again, according to the right-hand rule, the magnetic field at the first segment 51 of the second conductive element 5 flows downward, and the magnetic field at the second segment 52 flows upward. This upward and downward magnetic field partially cancels out the magnetic field. Furthermore, in adjacent first and second conductive elements 5, the current in the second segment 52 of the first conductive element 5 flows downward, and the current in the first segment 51 of the second conductive element 5 flows upward. This upward and downward magnetic field further cancels out the magnetic field, resulting in a smaller magnetic field between the first and second conductive elements 5. Therefore, using multiple conductive elements 5 can help cancel out the magnetic field generated by the current in the resistor element region, thereby improving the accuracy of current measurement.

[0038] More specifically, the second segment 52 of the first conductive element 5 is disposed adjacent to the first segment 51 of the second conductive element 5. The first segment 51 and the second segment 52 are disposed in parallel; the first segment 51 and the second segment 52 are made of copper.

[0039] The other end of the first segment 51 of each conductive element 5 is welded to one end of its second segment 52. Specifically, the other end of the first segment 51 of each conductive element 5 is brazed to one end of its second segment 52. The length of the first segment 51 is shorter than the length of the second segment 52, which facilitates connection.

[0040] In addition, to more precisely control the resistance of the conductive component 5, a resistor 6 is detachably connected to the second segment 52. The resistor 6 can be replaced with a resistor material of a preset resistance value as needed. The resistor material can be, but is not limited to, copper-manganese-tin alloy. The position of the resistor 6 on the second segment 52 can be set as needed; it can be near the upper end or near the lower end, without any specific limitation.

[0041] More specifically, the second segment 52 includes a first segment 521 and a second segment 522. One end of the first segment 521 is connected to the other end of the first segment 51. The other end of the first segment 521 and one end of the second segment 522 are respectively connected to the resistive element 6. The other end of the second segment 522 is connected to the second conductive connector 4.

[0042] In addition, for ease of installation, one end of the first conductive connector 3 is mounted on the first ceramic substrate 7; and one end of the second conductive connector 4 is mounted on the second ceramic substrate 8. The first ceramic substrate 7 and the second ceramic substrate 8 are arranged to extend longitudinally.

[0043] The first connection terminal 1 and the second connection terminal 2 can be used as current-taking connection points 11 and 21, and voltage-taking connection points 12 and 22 can also be set at the lower end of the current connection points.

[0044] Furthermore, the low magnetic field interference multi-path resistor 100 is used for multiple input and output terminals for conducting the current to be measured. Each branch is arranged coaxially and connected in series, so that the current flows in opposite directions. This flow pattern helps to cancel the magnetic field generated by the current in the resistor element region, thereby improving the accuracy of current measurement.

[0045] In conductive element 5, the current directions of the first segment 51 and the second segment 52 are opposite. The first segment 51 and the second segment 52 are brazed together, so the magnetic fields generated by the first segment 51 and the second segment 52 within the same conductive element 5 are opposite and can cancel each other out at least partially. Furthermore, the magnetic fields generated between adjacent conductive elements 5, specifically the second segment 52 and the first segment 51, are also opposite, thus further canceling out the magnetic fields generated by adjacent conductive elements 5. Overall, this reduces magnetic field interference in the resistor and improves measurement accuracy.

[0046] Furthermore, the low magnetic field interference multi-path resistor 100 provided by this utility model, due to its structural design features, can be designed as a rectangle, which allows the conductor to be combined from multiple flat plates, thus greatly simplifying the production process. Since flat plates are simpler and cheaper to process and assemble, this improvement not only reduces material waste and improves production efficiency, but also significantly reduces production costs.

[0047] Furthermore, the low magnetic field interference multi-channel resistor 100 provided by this invention has a structure where the input and output conductors are coaxial and the current directions are opposite, which can effectively cancel the magnetic field generated by the current. The cancellation of the magnetic field is particularly significant in the resistor element area, reducing the interference of the magnetic field on the current measurement and thus improving the measurement accuracy. This is crucial for applications requiring high-precision current detection.

[0048] Furthermore, the structure of this invention can utilize a large copper plate as the material for both the current supply and output sections, as well as the forward and return conductors. This design significantly reduces power loss under high current conditions, improving the resistor's durability and power carrying capacity. In addition, copper's excellent conductivity and heat dissipation also enhance the overall system performance and safety.

[0049] Furthermore, the resistor element is designed to be embedded between the conductor plates, spanning the gap in the direction of current flow. This design prevents unwanted current shunting and improves the accuracy of current measurement. Simultaneously, this composite plate design facilitates production using inexpensive composite strips, enhancing production flexibility and economy.

[0050] Furthermore, spatially distributed voltage measurements are achieved by arranging multiple pairs of voltage taps on the resistor element. This multi-point measurement method takes into account the non-uniformity of current distribution and further improves measurement accuracy by calculating the average value of the voltage measurements. This method compensates for the influence of thermoelectric voltage, ensuring the accuracy of voltage drop measurements.

[0051] Furthermore, the circuit measurement section is positioned inside the return conductor, and the lateral arrangement of the current flow direction is optimized by utilizing the direct contact between the printed circuit board and the stamping component. This design not only simplifies the circuit layout but also improves the stability and reliability of the measurement circuit.

[0052] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.

Claims

1. A low magnetic field interference multi-pass resistor, characterized by, include: First connection end and second connection end; A first conductive connector and a second conductive connector extend laterally. One end of the first conductive connector is connected to a first connection end, and the other end extends laterally toward the second connection end. The second conductive connector and the first conductive connector are arranged longitudinally at intervals. One end of the second conductive connector is connected to the second connection end. Multiple conductive elements are arranged side by side in a transverse direction. Each conductive element includes a first segment and a second segment extending in a longitudinal direction. The first segment and the second segment are arranged laterally at intervals. One end of the first segment is connected to the first conductive connector, and the other end of the first segment is connected to one end of the second segment. The other end of the second segment is connected to the second conductive connector.

2. The low magnetic field interference multi-channel resistor of claim 1, wherein, The other end of the first segment of each conductive element is welded together with one end of its second segment.

3. The low magnetic field interference multi-channel resistor of claim 1, wherein, The second segment is detachably connected to a resistor.

4. The low magnetic field interference multi-channel resistor of claim 3, wherein, The second segment includes a first segment and a second segment. One end of the first segment is connected to the other end of the first segment. The other end of the first segment and one end of the second segment are respectively connected to the resistive element. The other end of the second segment is connected to the second conductive connector.

5. The low magnetic field interference multi-channel resistor of claim 3, wherein, The resistive component is made of copper-manganese-tin masterbatch.

6. The low magnetic field interference multi-channel resistor of claim 1, wherein, The length of the first segment is less than the length of the second segment.

7. The low magnetic field interference multi-channel resistor of claim 1, wherein, One end of the first conductive connector is mounted on the first ceramic substrate; One end of the second conductive connector is mounted on the second ceramic substrate.

8. The low magnetic field interference multi-channel resistor of claim 7, wherein, The first ceramic substrate and the second ceramic substrate are arranged to extend longitudinally.

9. The low magnetic field interference multi-channel resistor of claim 1, wherein, The number of conductive components is two, namely the first conductive component and the second conductive component.

10. The low magnetic field interference multi-channel resistor of claim 1, wherein, The first segment and the second segment are set in parallel; The first and second segments are made of copper.

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