Power detection module

Abstract

The utility model belongs to the field of power supply equipment, and particularly provides a power detection module which comprises an input end, a magnetic ring, a current detection element, a voltage collector and an output copper bar which are arranged on a PCB, the input end comprises a first input terminal and a second input terminal which are arranged in pairs, the first input terminal is electrically connected with a first copper bar, and the second input terminal is electrically connected with a second copper bar. The first copper bar passes through the magnetic ring, and is electrically connected with the voltage collector after the current is detected by the current detection element; the second input terminal is electrically connected with a second copper bar, the second copper bar is electrically connected with the output copper bar to form an enclosure structure, and the first input terminal, the current detection element and the voltage collector are all located in the enclosure structure; according to the utility model, the positive current and the negative current of the power supply respectively pass through the two independent branches, the current interference between the two branches is small, and obvious partitions are formed, so that the detection branches are prevented from being interfered by signals, and high-precision power detection is realized; wherein one branch forms an enclosed structure, so that the whole module is more compact in arrangement and smaller in overall size.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power detection equipment field, specifically provides a kind of power detection module. BACKGROUND

[0002] Power detection module is generally used to monitor system power output power component, can gather sampling current and gather sampling voltage and transmission to control circuit, and power is calculated according to sampling current and sampling voltage by control circuit.Power detection module is usually integrated in power supply, for real-time monitoring power output voltage, current and power and other key parameters, ensure that power supply runs under safe, stable conditions.

[0003] For large industrial power supply (such as direct current pulse sputtering power supply) of whole machine, in order to improve detection accuracy, multiple power detection modules are usually set to monitor and detect.Currently, when the power detection module used in the market collects high-frequency current generated by industrial power supply, high-frequency interference is easy to occur between current main loop and detection loop, which further leads to reduced detection accuracy, and multiple power detection modules are also set to make power supply structure too large, which is not conducive to subsequent maintenance.So, a small volume, high-frequency interference resistant high-precision power detection module is urgently needed. SUMMARY

[0004] To solve the problem of large volume, difficult maintenance and interference of the power detection device in the prior art, a small volume, high interference-resistant power detection module is provided.

[0005] The technical scheme of the utility model is as follows:

[0006] A power detection module, comprising a PCB board, an input end, a magnetic ring, a current detection element, a voltage collector and an output copper bar are arranged on the PCB board;The input end includes a pair of first input terminals and second input terminals, the first input terminal is electrically connected with the first copper bar, the first copper bar passes through the magnetic ring, and is electrically connected with the voltage collector after detecting current through the current detection element;The second input terminal is electrically connected with the second copper bar, and the second copper bar is electrically connected with the output copper bar to form an enclosed structure, and the first input terminal, the current detection element and the voltage collector are all located in the enclosed structure.

[0007] In the scheme, the current input from the first input terminal passes through the first copper bar, the current detection element and the voltage collector for current and voltage detection and collection, and forms a detection branch. The current input from the second input terminal passes through the second copper bar and the output copper bar to form a current main branch. The positive and negative currents of the power supply pass through the current main branch and the detection branch respectively. The two branches are separated from each other to reduce interference. The detection branch is surrounded by the surrounding structure formed by the current main branch, which can make the structure on the PCB more compact. The detection branch and the current main branch are separated from each other to form a clear partition, effectively avoiding the detection branch from being interfered by signals, and improving the detection accuracy.

[0008] Preferably, the input terminal, the magnetic ring and the current detection element are symmetrically arranged on both sides of the PCB.

[0009] In the scheme, the current input from the first input terminal passes through the first copper bar, the current detection element and the voltage collector for current and voltage detection and collection. Due to the symmetrical arrangement, the detection branch becomes two groups. The two detection branches detect the current in a shunt manner. The two symmetrically arranged detection branches detect the current separately, which is conducive to the modularization of power combination and can also reduce the interference of high-frequency current on collection, so that the detection accuracy of the current detection element is higher. The second input terminal, the second copper bar and the output copper bar form a surrounding structure, which is also symmetrically arranged. The two second copper bars and the output copper bar can surround the two detection branches between the two main branches to reduce the signal interference between the two branches.

[0010] Preferably, the first input terminal, the current detection element and the voltage collector are located in the surrounding structure. Preferably, the length of the first copper bar passing through the magnetic ring is less than the length of the second copper bar passing through the magnetic ring. The first copper bar and the second copper bar pass through the same magnetic ring, and the length of the second copper bar passing through the magnetic ring is longer, which ensures that there is a certain gap between the surrounding structure formed by the subsequent main branch and the detection branch, so as to increase the creepage distance and further reduce the interference on the detection branch of the first copper bar during subsequent detection.

[0011] Preferably, the first copper bar and the second copper bar are parallel to each other, the first copper bar is arranged between the two symmetric second copper bars, the output copper bar is connected to the second copper bars at both ends of the PCB, and the two second copper bars and the output copper bar form a frame-shaped structure. The first copper bar and the second copper bar are parallel to each other to ensure the consistency of the distance between the detection branch and the current main branch, and to ensure that the current main branch of the second copper bar surrounds the detection branch of the first copper bar to form a neat frame-shaped structure, so that the layout of the entire PCB is more compact and regular.

[0012] Preferably, the output end includes a first output terminal and a second output terminal, the first output terminal is arranged outside the frame-shaped structure, and the second output terminal is arranged on the output copper bar.

[0013] In this scheme, the current input from the first input terminal is output from the first output terminal, and the detection branch is electrically connected with other modules in the power supply to form a complete loop. Similarly, the current input from the second input terminal is output from the second output terminal, and the main branch is electrically connected with other modules in the power supply to form a complete loop. Moreover, after detecting the current signal and the voltage signal, the current is output from outside the frame-shaped structure formed by the main branch, which ensures the compactness of the frame-shaped structure and avoids interference with the output of the current in the detection branch, thereby affecting the detection accuracy.

[0014] Preferably, the data signals in the current detection element and the voltage collector are output through a signal output end arranged in the frame-shaped structure. By arranging the signal output end inside the frame, the compactness of the module structure is ensured. Meanwhile, the frame-shaped structure formed by the main branch of the current is separated from the detection branch, effectively reducing the interference between them.

[0015] Preferably, the current input from the first input terminal is combined after passing through the current detection element, and the current input from the second input terminal is combined on the output copper bar. In this scheme, the current for detection is divided when entering the symmetrically arranged detection branch to reduce the interference of high-frequency current on the collection, and then combined after detecting the current respectively, and finally output from the first output terminal to form a complete current path.

[0016] Preferably, the output copper bar is connected with the PCB board through copper pieces at both ends, and the two copper pieces fix the output copper bar and the second copper bars on both sides to ensure the stability and firmness of the output copper bar mounted on the PCB board.

[0017] Preferably, the PCB boards are arranged at intervals on the base plate, the magnetic ring is arranged in the mounting hole of the PCB board, and a first silica gel pad is arranged between the magnetic ring and the base plate. Since the magnetic ring is embedded on the PCB board, the first silica gel pad can adjust the height of the magnetic ring, so that the first copper bar and the second copper bar pass through the center of the magnetic ring as much as possible, and also ensure the accuracy and stability of the installation of the magnetic ring.

[0018] Preferably, a heat-conducting block is arranged between the PCB and the base plate, and a second silica gel pad is arranged between the heat-conducting block and the PCB board. The heat-conducting block is used to transfer the heat generated by the current detection element and the voltage collector.

[0019] In this scheme, the current detection element and the voltage collector are the main heat-generating elements of the module. Through the second silica gel pad in contact with the PCB board, the heat generated by the current detection element and the voltage collector can be transferred to the base plate through the heat-conducting block for heat dissipation, thereby ensuring the stability and accuracy of the detection module.

[0020] The beneficial effects of this utility model are:

[0021] This invention separates the positive and negative currents of the power supply into the main current branch and the detection branch, respectively. The two branches are isolated from each other, resulting in minimal current interference and a clear partition. This effectively prevents the detection branch from being interfered with by the signal from the main current branch, improving detection accuracy and achieving high-precision power detection. Furthermore, the enclosure structure formed by the main current branch surrounds the detection branch, allowing for a more compact arrangement of components within the power detection module, thereby reducing the overall module size. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 This is a front view of the present invention.

[0025] In the above figures, the corresponding reference numerals are as follows:

[0026] 1-PCB board, 2-substrate, 3-input terminal, 301-first input terminal, 302-second input terminal, 4-current detection element, 5-voltage acquisition unit, 6-first copper busbar, 7-second copper busbar, 8-output copper busbar, 9-magnetic ring, 10-output terminal, 1001-first output terminal, 1002-second output terminal, 11-signal output terminal, 12-first silicone pad, 13-second silicone pad, 14-heat-conducting block, 15-copper component, 16-discharge resistor. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of this utility model.

[0028] Example 1:

[0029] like Figure 1The power detection module shown includes a PCB board 1, the PCB board 1 is provided with an input end 3, a magnetic ring 9, a current detection element 4, a voltage collector 5 and an output copper bar 8; the input end 3 includes a pair of first input terminals 301 and second input terminals 302, the first input terminals 301 are electrically connected with a first copper bar 6, the first copper bar 6 passes through the magnetic ring 9, and is electrically connected with the voltage collector 5 after detecting the current through the current detection element 4; the second input terminals 302 are electrically connected with a second copper bar 7, the second copper bar 7 is electrically connected with the output copper bar 8 to form an enclosed structure, and the first input terminals 301, the current detection element 4 and the voltage collector 5 are all located in the enclosed structure.

[0030] Wherein, the current input from the first input terminals 301 passes through the first copper bar 6, and then passes through the current detection element 4 and the voltage collector 5 to detect the current size and voltage size respectively, and forms a detection branch; the current input through the second input terminals 302 passes through the second copper bar 7 and the output copper bar 8 to form a current main branch, and the positive and negative currents of the power supply pass through the current main branch and the detection branch respectively, and the two branches are separated from each other to reduce the mutual interference between the circuits.

[0031] Specifically, the outer side of the magnetic ring 9 is coated with insulating plastic through a plastic dipping process, and the magnetic ring 9 is connected with a circular insulating piece on both sides to play a good filtering role on the first copper bar 6 and the second copper bar 7 passing therethrough; and the current detection element 4 preferably adopts a Hall sensor, since the Hall sensor detects the current without passing the current, but measures the current through the magnetic field induction, so the current input from the input end 3 can be positive or negative, that is, the input in the measurement loop can be negative current or positive current, and the current main branch can also input positive current or negative current. In this specification, the negative current is input through the first input terminals 301, and the positive current is input through the second input terminals 302.

[0032] It should be noted that the outer surfaces of the first copper bar 6, the second copper bar 7 and the output copper bar 8 need to be subjected to plastic dipping treatment to increase the insulation performance and reduce interference, the first copper bar 6 and the second copper bar 7 are electrically connected with the lead of the PCB board 1 through the lower surfaces, and the output copper bar 8 is fixed on the PCB board 1 through the copper pieces 15 at both ends. The positive input terminal of the first input terminals 301, the second copper bar 7 and the output copper bar 8 form a current main loop, the current main loop forms an enclosed structure, and the shape of the enclosed structure can be "L" shape, "C" shape and the like, so that the detection branch is surrounded in a more compact and orderly structure.

[0033] On this basis, the PCB board 1 is further provided with an output end 10, the output end 10 comprising a first output terminal 1001 and a second output terminal 1002, the first output terminal 1001 being arranged outside the frame-shaped structure, and the second output terminal 1002 being arranged on the output copper bar 8. The current input from the first input terminal 301 is output from the first output terminal 1001, so that the detection branch and other modules in the power supply are electrically connected to form a complete loop. Similarly, the current input from the second input terminal 302 is output from the second output terminal 1002, so that the current main branch and other modules in the detection power supply are electrically connected to form a complete loop. After the detection branch detects the current signal and the voltage signal, the current is output from the outside of the frame-shaped structure formed by the current main branch, which ensures the compactness of the frame-shaped structure and avoids interference when the current of the detection branch is output, thereby affecting the detection accuracy.

[0034] Specifically, the data signals in the current detection element 4 and the voltage collector 5 are output through a signal output end 11 arranged in the frame-shaped structure.

[0035] Further, as shown in Figure 2 , the PCB board 1 is arranged at intervals on the base plate 2, and the PCB board 1 is supported on the base plate 2 by bolts. The magnetic ring 9 is arranged in the mounting hole of the PCB board 1, and a first silica gel pad 12 is arranged between the magnetic ring 9 and the base plate 2. Since the magnetic ring 9 is embedded on the PCB board 1, the first silica gel pad 12 is used to adjust the height of the magnetic ring 9, so that the first copper bar 6 and the second copper bar 7 can pass through the center of the magnetic ring 9 as much as possible, and the accuracy and stability of the installation of the magnetic ring 9 are ensured. Further, a heat-conducting block 14 is arranged between the PCB board 1 and the base plate 2, and a second silica gel pad 13 is arranged between the heat-conducting block 14 and the PCB board 1. The heat-conducting block 14 is used to transfer the heat generated by the current detection element 4 and the voltage collector 5. The current detection element 4 and the voltage collector 5 are the main heat-generating elements of the module, and through the second silica gel pad 13 in contact with the PCB board 1, the heat generated by the current detection element 4 and the voltage collector 5 can be transferred to the base plate 2 through the heat-conducting block 14 for heat dissipation, thereby ensuring the stability and accuracy of the detection module.

[0036] Further, a discharge resistor 16 is further arranged on the PCB board, as shown in Figure 1 and Figure 2 , the discharge resistor 16 is provided with two terminals connected to the first output terminal 1001 and the second output terminal 1002 respectively, and functions as a dummy load for discharge under no load after detection.

[0037] It should be noted that the length of the first copper bar 6 passing through the magnetic ring 9 is less than the length of the second copper bar 7 passing through the magnetic ring 9. The first copper bar 6 and the second copper bar 7 pass through the same magnetic ring 9, and the length of the second copper bar 7 passing through the magnetic ring 9 is longer, so as to increase the distance between the detection branch and the current main branch, that is, the shortest distance between the first copper bar 6 and the wires of the current detection element 4 on the PCB board 1 and the output copper bar 8. By lengthening the length of the second copper bar 7, the creepage distance is increased.

[0038] Embodiment two:

[0039] On the basis of embodiment one, in order to further improve the detection accuracy of the power detection module, the input end 3, the magnetic ring 9 and the current detection element 4 are symmetrically arranged on both sides of the PCB board 1, as shown in Figure 1

[0040] Specifically, the detection branch is changed into two groups of axisymmetric branches arranged on the PCB board 1, that is, the symmetric elements specifically include the first input terminal 301, the second input terminal 302, the magnetic ring 9, the first copper bar 6, the second copper bar 7 and the current detection element 4. The two detection branches detect the current shunt, and the two detection branches arranged symmetrically detect the current separately, which is beneficial to the modularization of the power combination and can also reduce the interference of high-frequency current on the collection, so that the detection accuracy of the current detection element 4 is higher. After shunt, the voltage does not change, so only one voltage collector 5 is needed to detect the voltage of the single-sided detection branch or to detect after the two detection branches are combined. The second input terminal 302, the second copper bar 7 and the output copper bar 8 form a single-sided enclosed structure, which is preferably "L" shaped, that is, the first copper bar 6 and the second copper bar 7 are parallel to each other, the first copper bar 6 is arranged between the two symmetric second copper bars 7, and the single output copper bar 8 is connected to the two symmetric second copper bars 7 at both ends. The connection is as straight as possible to ensure that after being arranged symmetrically, a neat frame structure is formed, which cooperates with the cuboid structure of the voltage collector 5 and the current detection element 4 (Hall sensor) to make the arrangement of each component on the PCB board 1 more compact and neat.

[0041] Further, the current input by the first input terminal 301 is combined after passing through the current detection element 4. Since the voltage of the detection power supply does not change after shunt, the current on the detection branch can be combined after detection. Whether the current is combined after passing through the voltage collector 5 or passing through the voltage collector 5 after being combined, the detected voltage will not be different. The current input by the second input terminal 302 is combined on the output copper bar 8 and output through the second output terminal 1002, forming a complete current path. The current for detection is shunted when entering the symmetrically arranged detection branch to reduce the interference of high-frequency current on the collection. After detecting the current separately, the current is combined and output from the first output terminal 1001, forming a complete current path.​

[0042] Need to explain, no matter in embodiment one and embodiment two, first output terminal 1001 can set two, such as Figure 1 And Figure 2 As shown, after two detection branches converge, they are branched again, and the negative current is output from two first output terminals 1001, which is convenient for selecting smaller PCB terminals to adapt to thinner cables and subsequent wiring in the finished product case.

[0043] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples. The above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application. These changes and improvements all fall within the scope of the present application.

Claims

1. A power detection module, characterized in that: The system includes a PCB board (1), on which an input terminal (3), a magnetic ring (9), a current detection element (4), a voltage acquisition unit (5), and an output copper busbar (8) are provided. The input terminal (3) includes a first input terminal (301) and a second input terminal (302) arranged in pairs. The first input terminal (301) is electrically connected to a first copper busbar (6). The first copper busbar (6) passes through the magnetic ring (9) and is electrically connected to the voltage acquisition unit (5) after the current is detected by the current detection element (4). The second input terminal (302) is electrically connected to a second copper busbar (7). The second copper busbar (7) and the output copper busbar (8) are electrically connected to form an enclosed structure. The first input terminal (301), the current detection element (4), and the voltage acquisition unit (5) are all located within the enclosed structure.

2. The power detection module according to claim 1, characterized in that: The PCB board (1) has a set of input terminals (3), magnetic rings (9) and current detection elements (4) on both sides, and the two sets of input terminals (3), magnetic rings (9) and current detection elements (4) are arranged symmetrically.

3. A power detection module according to claim 2, characterized in that: The length of the first copper busbar (6) extending out of the magnetic ring (9) is less than the length of the second copper busbar (7) extending out of the magnetic ring (9).

4. A power detection module according to claim 3, characterized in that: The first copper busbar (6) and the second copper busbar (7) are parallel to each other. The first copper busbar (6) is arranged between two symmetrical second copper busbars (7). The two ends of the output copper busbar (8) are respectively connected to the second copper busbars (7) at both ends of the PCB board (1). The two second copper busbars (7) and the output copper busbar (8) form a frame structure.

5. A power detection module according to claim 4, characterized in that: It also includes an output terminal (10), which includes a first output terminal (1001) and a second output terminal (1002). The first output terminal (1001) is disposed outside the frame structure, and the second output terminal (1002) is disposed on the output copper busbar (8).

6. A power detection module according to claim 5, characterized in that: The data signals from the current sensing element (4) and the voltage acquisition unit (5) are output through the signal output terminal (11), which is located in the frame structure.

7. A power detection module according to any one of claims 2 to 6, characterized in that: The current input at the first input terminal (301) is combined after passing through the current detection element (4), and the current input at the second input terminal (302) is combined on the output copper busbar (8).

8. A power detection module according to claim 1, characterized in that: The output copper busbar (8) is connected to the PCB board (1) at both ends via copper parts (15).

9. A power detection module according to claim 1, characterized in that: The PCB board (1) is spaced on the substrate (2), the magnetic ring (9) is disposed in the mounting hole of the PCB board (1), and a first silicone pad (12) is disposed between the magnetic ring (9) and the substrate (2).

10. A power detection module according to claim 9, characterized in that: A heat-conducting block (14) is provided between the PCB and the substrate (2), and a second silicone pad (13) is provided between the heat-conducting block (14) and the PCB board (1). The heat-conducting block (14) is used to transfer the heat generated by the current detection element (4) and the voltage collector (5).

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