CN216696448U

CN216696448U - Current detection device

Info

Publication number: CN216696448U
Application number: CN202123172198.6U
Authority: CN
Inventors: 刘孟昌; 刘正彬
Original assignee: Chroma ATE Suzhou Co Ltd
Current assignee: Chroma ATE Suzhou Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-07
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a current detection device, which is coupled in a power supply loop through a first electric connection part and a second electric connection part and outputs a detection result by means of a first measurement point and a second measurement point, and the current detection device comprises: the device comprises a first electrode, a second electrode, an insulator and a current divider. The first electrode is provided with a base body and a column body serving as a first electric connection part; the insulating part is provided with a channel for accommodating the cylinder; the second electrode is arranged at the front end of the insulating part and is provided with a through hole for the cylinder to protrude, and the outer surface of the second electrode is used as a second electric connection part; the current diverter is a metal sheet body which is arranged on the surface of the insulating part in a surrounding mode and is coaxial with the cylinder, and is coupled with the first electrode and the second electrode, and a first measuring point and a second measuring point are arranged on the metal sheet body. The arrangement can effectively improve the stability of the electrical characteristics and the accuracy of current detection.

Description

Current detection device

[ technical field ] A method for producing a semiconductor device

The present invention relates to a sensing device, and more particularly, to a current sensing device having a specific structural configuration to generate a correct and stable current sensing result.

[ background of the utility model ]

In the quality detection or other application, the electronic product usually needs to detect the current of the circuit to obtain the parameters of the electrical characteristics for subsequent analysis or determination.

In order to ensure or grasp the stability of the electronic product in operation, it is necessary to accurately measure the current in the circuit during current detection. However, many electronic products nowadays often have electrical characteristics such as high bandwidth or large current, which makes the current detection easily interfered to cause errors, and further reduces the reliability of the current detection.

[ Utility model ] content

An object of the present invention is to improve the accuracy and stability of current detection.

Another objective of the present invention is to provide a current detection apparatus suitable for high bandwidth.

In order to achieve the above and other objects, the present invention provides a current detection device, which is coupled to a power supply circuit through a first electrical connection portion and a second electrical connection portion, and outputs a detection result by using a first measurement point and a second measurement point, comprising: the device comprises a first electrode, a second electrode, an insulator and a current divider. The first electrode is provided with a base body and a column body extending out of the base body, and one end part of the column body far away from the base body is used as the first electric connection part; the insulating part is provided with a channel for accommodating the cylinder; the second electrode is arranged at the front end of the insulating part and is provided with a through hole for the post to protrude out, the outer surface of the second electrode is used as the second electric connection part, and the second electrode is isolated from the post through the insulating part; the current divider is a metal sheet body which is annularly arranged on the surface of the insulating part and is coaxial with the cylinder, the metal sheet body is coupled with the first electrode and the second electrode, and the first measuring point and the second measuring point are arranged on the metal sheet body.

According to an embodiment of the present invention, the base may be configured to be inwardly recessed to form an annular wall and form a limiting portion surrounding the cylinder, and the limiting portion is configured to receive the end of the insulating member.

According to an embodiment of the present invention, the end edge of the annular wall and the metal sheet may be connected by a rear end welding portion.

According to an embodiment of the present invention, the second electrode and the metal sheet may be connected by a front end welding portion.

According to an embodiment of the present invention, the first electrical connection portion of the first electrode may be configured to receive an input current of the power supply circuit, and the second electrical connection portion of the second electrode may be configured to generate an output current to the power supply circuit.

According to an embodiment of the present invention, the insulating member may have a positioning plate protruding outward at a side edge thereof, the metal sheet body surrounding the surface of the insulating member has a gap through which the positioning plate protrudes, and the first measuring point and the second measuring point extending from the metal sheet body may be disposed on the positioning plate.

According to an embodiment of the present invention, the insulating member may be configured in a cylindrical shape, and the metal sheet may be configured in a ring-shaped sheet having a curvature.

According to an embodiment of the present invention, the first measuring point and the second measuring point disposed adjacent to the gap may protrude from the same side of the metal sheet body in a radial direction.

According to an embodiment of the present invention, the first electrode and the second electrode may be made of non-alloy material, and the current divider may be made of alloy material.

According to an embodiment of the present invention, the first electrode and the second electrode may be made of copper, and the current divider may be made of manganese-copper alloy.

According to an embodiment of the present invention, the method may further include: a heat dissipation element and a blocking member. The heat dissipation element can be supported on the periphery of the current shunt by the barrier, and the heat dissipation element does not contact the first electrode, the second electrode and the current shunt by the barrier.

According to an embodiment of the present invention, the method may further include: a fan device. The fan device is arranged at one end of the heat dissipation element to provide airflow for the heat dissipation element.

In this way, under the configuration that the current divider is coaxial with the column of the first electrode and the configuration that the current divider is annularly arranged on the surface of the insulating part, the flow path of the current in the current detection device forms a go-back staggered path, in such a transmission path, the magnetic field distribution derived by the current can be effectively homogenized, and the current divider used as a voltage sampling is not easy to greatly influence the impedance along with the increase of the frequency, so that the stability of the electrical characteristics and the accuracy of the current detection can be effectively improved.

[ description of the drawings ]

FIG. 1 is an exploded view of a current detection device according to an embodiment of the present invention;

FIG. 2 is a schematic circuit diagram of the current detecting device under a test state;

FIG. 3 is a schematic perspective view of the current detecting device of the embodiment shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view of a current detection device according to another embodiment of the present invention;

fig. 5 is an exploded view of a current detecting device according to still another embodiment of the utility model.

[ detailed description ] embodiments

For a fuller understanding of the objects, features and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

the terms "a" or "an" are used herein to describe a unit, component, structure, device, module, system, region or area, etc., merely for convenience of description and to provide a general sense of the scope of the utility model. Accordingly, unless expressly stated otherwise, such description should be read to include one or at least one and may be singular or plural.

In this application, the use of the terms "comprises, comprising, having" or any other similar term is not limited to the recitation of such elements as recited herein, but rather can include other elements not expressly recited, but rather inherent to such element, component, structure, device, module, system, part, or region.

In this application, the use of the terms first, second, etc. as used herein to distinguish or refer to a same or similar element or structure, location, or area are not necessarily intended to imply a spatial order to such elements, structures, locations, or areas. It should be understood that in some cases or configurations, ordinal terms may be used interchangeably without affecting the practice of the utility model.

Referring to fig. 1 and fig. 2, fig. 1 is an exploded schematic view of a current detection device according to an embodiment of the utility model, and fig. 2 is a circuit schematic view of the current detection device in a test state.

The current detection device 100 includes: a first electrode 110, a second electrode 120, an insulator 130, and a current divider 140. The current detection device 100 can be connected in series in the power supply circuit of the power supply 200 and the object 300 to detect the current of the object 300. The end 1111 on the first electrode 110 serves as a first electrical connection 101 and the outer surface 121 of the second electrode 120 serves as a second electrical connection 102. In the example of fig. 2, the first electrical connection portion 101 of the current detection device 100 is coupled to the positive terminal of the object 300 to be tested, the second electrical connection portion 102 is coupled to the positive terminal of the power source 200, and the current i flows from the second electrical connection portion 102 into the current detection device 100 and flows from the first electrical connection portion 101 out of the current detection device 100.

In other embodiments, the second electrical connection portion 102 of the current detection apparatus 100 can also be configured to couple to the positive terminal of the object 300, and the first electrical connection portion 101 is coupled to the positive terminal of the power source 200, so that the current i flows from the first electrical connection portion 101 into the current detection apparatus 100 and flows from the second electrical connection portion 102 out of the current detection apparatus 100.

In the current path, the current detection device 100 uses the current shunt 140 as the main body for detecting the current flow. The current divider 140 is provided with a first measurement point 141 and a second measurement point 142, and the first measurement point 141 and the second measurement point 142 are used for coupling to an external signal processing device, such as: a voltage measurement device. The current divider 140 has a voltage difference between the first measurement point 141 and the second measurement point 142 as a detection result by its own resistance value, so that a voltage drop value in the difference state can be obtained by a signal processing device, and the detected current value can be determined by the voltage drop value and the resistance value of the current divider 140.

Thus, the detection result obtained by the current detection apparatus 100 can be used by a back-end apparatus or a device to determine the current value in the power supply loop according to the detection result. Since a magnetic field is generated around the current during the transmission of the current in the conductor, which may cause a disturbance to the current detection device 100, the accuracy of the current detection is improved by the structural configuration in the current detection device 100.

As shown in fig. 1, the first electrode 110 has a base 112 and a pillar 111. The post 111 is configured to extend from the base 112. The post 111 and the base 112 can be integrally formed, or the post 111 and the base 112 can be electrically connected by other connection methods. The post 111 is defined as a first electrical connection portion 101 for connecting a power supply circuit in series at an end 1111 away from the base 112.

In one embodiment, the seat body 112 can be configured to exhibit an inward recess at one end. The outer periphery of the base 112 is surrounded by a ring wall 1121, the ring wall 1121 surrounds the column 111, and the recessed portion is defined as a stopper 1122. The position-limiting portion 1122 is used for accommodating the end of the insulating element 130, thereby limiting the position of the insulating element 130.

As shown in fig. 1, the insulator 130 has a channel 131 that receives the post 111. In one embodiment, the insulator 130 is configured as a cylinder, and an outer circumferential surface of the cylinder 111 having a curvature is covered therein by a channel 131. The insulating member 130 is made of polyoxymethylene (POM plastic) which is a heat-resistant material, or other materials with insulating effect.

The second electrode 120 is disposed at the front end of the insulating member 130 and has a through hole 122 for the end 1111 of the pillar 111 to protrude. The outer surface of the second electrode 120 may be defined as the second electrical connection portion 102. The second electrode 120 is isolated from the pillar 111 by the insulating member 130, and there is no direct electrical connection.

The current divider 140 serves as an intermediate element coupled between the first electrode 110 and the second electrode 120, allowing the current in the power supply loop to flow therethrough for detecting the current flowing in the power supply loop. The current divider 140 has a resistance value and is in the shape of a metal sheet and is coupled to an external signal processing device through a first measurement point 141 and a second measurement point 142. The voltage difference between the first measurement point 141 and the second measurement point 142 can be used for an external signal processing device to obtain the detection result, so as to determine the current value in the power supply loop.

The current shunt 140 is configured as a metal sheet and is disposed around the surface of the insulating member 130. It is noted that the current splitter 140 and the post 111 are coaxially disposed in a spatial relationship. As shown in fig. 1, the cylinder 111 may be limited by the channel 131 of the insulator 130, and the current divider 140 is disposed on the surface of the insulator 130 and has a curvature following the cylindrical shape of the insulator 130, and has a shape of a ring-shaped plate. Thus, the insulating member 130 is configured such that a spatial position between the current shunt 140 and the column 111 is limited, and a transmission path of the current in the current detecting device 100 is defined.

Referring to fig. 1 and fig. 3, fig. 3 is a schematic perspective view of the current detection apparatus of the embodiment of fig. 1. The insulating member 130 has positioning plates 132 at side edges thereof projecting outward. The positioning plate 132 is used to support a first measuring point 141 and a second measuring point 142 extending from the metal sheet of the current splitter 140. The positioning plate 132 may have a groove for disposing a conductive wire (not shown) coupled to the first measuring point 141 and the second measuring point 142. The annular metal sheet of the current divider 140 has a slit L (shown in fig. 1) for protruding the positioning plate 132.

In one embodiment, the edge of the annular wall 1121 of the first electrode 110 is electrically connected to the metal sheet of the current splitter 140 by the rear-end soldering portion 143. In addition, the second electrode 120 and the metal sheet of the current divider 140 can be electrically connected by a front end welding portion by welding. That is, the annular wall 1121 and the end edge of the second electrode 120 are electrically connected to the metal sheet of the current divider 140 in a manner that a welding portion is arranged in one complete turn. The front end welding portion is not shown in fig. 3, and is the same as the rear end welding portion 143.

As shown in fig. 1 and 3, the first measurement point 141 and the second measurement point 142 disposed adjacent to the slit L are protruded from the same side of the current divider 140 along the radial direction of the metal sheet with cylindrical shape, that is, the first measurement point 141 and the second measurement point 142 are disposed approximately perpendicular to the surface of the metal sheet with cylindrical shape. In the example of fig. 3, the pillar 111 of the first electrode 110 may protrude out of the opening of the channel 131 of the insulating member 130, and the opening of the insulating member 130 also protrudes out of the opening of the through hole 122 of the second electrode 120, so as to further ensure the barrier property between the first electrode 110 and the second electrode 120.

Fig. 4 is a schematic cross-sectional view of a current detection device according to another embodiment of the utility model. The example of fig. 4 is similar to the example of fig. 3, and the flow direction of the current is illustrated by a schematic sectional view. The current detecting apparatus 100 of fig. 4 is an example in which the first electrode 110 is coupled to a positive terminal of an object to be measured, and the second electrode 120 is coupled to a positive terminal of a power supply (see fig. 2). The current i flows from the end 1111 of the pillar 111 of the first electrode 110, flows through the body of the pillar 111, enters the base 112 of the first electrode 110, flows into the current splitter 140 through the rear-end welding portion 143, and flows out from the second electrode 120 coupled to the current splitter 140. One end of the current divider 140 is abutted against the bevel opening 122 of the through hole 121 of the second electrode 120, and is coupled to the second electrode 120 by a front end welding portion not shown.

Based on the coaxial configuration between the current shunt 140 and the pillar 111, the symmetrical current paths can effectively cancel the interference phenomenon caused by the mutual induced magnetic field. In addition, the sheet metal type current divider 140 can also uniformize the magnetic field distribution derived from the current, and can also be suitable for an input current having a high frequency (for example, a large current, 100A).

In other embodiments, the first electrode 110 and the second electrode 120 are non-alloy (e.g., copper) and the current splitter 140 is alloy (e.g., manganese-copper or other alloys). In the first electrode 110, the second electrode 120 and the current divider 140, only the current divider 140 is made of alloy material and is matched with the shape of the metal sheet body and the coaxial configuration between the pillar 111, so that the resistance of the current divider 140 is less susceptible to the frequency variation.

Fig. 5 is an exploded view of a current detecting device according to another embodiment of the present invention. In this embodiment, the current detection apparatus 100 further includes: a heat sink 150 and a barrier 151. The heat dissipation element 150 is supported on the periphery of the current splitter 140 by the barrier 151, and the heat dissipation element 150 is not in contact with the base 112, the second electrode 120 and the current splitter 140 by the barrier 151. The heat dissipation element 150 is configured at the periphery as a fin structure, and further a fan device 160 may be configured at one end to provide a further fluid airflow to the heat dissipation element 150, thereby facilitating the improvement of the heat dissipation effect.

In summary, the current shunt is disposed on the surface of the insulating member and is coaxial with the metal sheet, and forms a symmetrical current path with the first electrode and the second electrode in the current detection device. Under the arrangement, the stability of the electrical characteristics and the accuracy of the current detection can be effectively improved.

The present invention has been disclosed in the foregoing in terms of preferred embodiments, however, it will be understood by those skilled in the art that the examples herein are for the purpose of illustration only and are not to be construed as limiting the scope of the utility model. It should be noted that all changes and substitutions equivalent to the embodiments are understood to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

[ reference numerals ]

100 current detection device

101 first electrical connection

102 second electrical connection

110 first electrode

111 column body

1111 ends

112 seat body

1121 annular wall

1122 limit part

120 second electrode

121 outer surface

122 through hole

123 bevel connection

130 insulating member

131 channels

132 positioning plate

140 current diverter

141 first measuring point

142 second measurement point

143 rear end welding part

150 heat dissipation element

151 barrier

160 fan device

200 power supply

300 test substance

i current of

L-shaped gap

Claims

1. A current detection device is coupled in a power supply loop through a first electric connection part and a second electric connection part, and outputs a detection result through a first measurement point and a second measurement point, and is characterized in that the current detection device comprises:

the first electrode is provided with a base body and a column body extending out of the base body, and one end part of the column body, which is far away from the base body, is used as the first electric connection part;

an insulator having a channel for receiving the post;

the second electrode is arranged at the front end of the insulating part and is provided with a through hole for the post to protrude out, the outer surface of the second electrode is used as the second electric connection part, and the second electrode is isolated from the post by the insulating part; and

the current divider is a metal sheet body which is annularly arranged on the surface of the insulating part and is coaxial with the cylinder, the metal sheet body is coupled with the first electrode and the second electrode, and the first measuring point and the second measuring point are arranged on the metal sheet body.

2. The current sensing device of claim 1, wherein the housing is configured to be recessed inwardly to form an annular wall and to form a retaining portion around the post for receiving the end of the insulator.

3. The current sensing device of claim 2, wherein the edge of the annular wall is connected to the metal sheet by a rear end weld.

4. The current sensing device of claim 3, wherein the second electrode is coupled to the metal sheet by a front weld.

5. The current sensing device of claim 1, wherein said first electrical connection of said first electrode is configured to receive an input current of said power supply circuit, and said second electrical connection of said second electrode is configured to generate an output current to said power supply circuit.

6. The current detecting device according to claim 1, wherein the insulating member has a positioning plate protruding outward at a side edge thereof, the metal sheet annularly disposed on the surface of the insulating member has a slit through which the positioning plate protrudes, and the first measuring point and the second measuring point extending from the metal sheet are disposed on the positioning plate.

7. The current sensing device of claim 6, wherein said insulator is configured as a cylinder and said metal sheet is configured as a ring-shaped sheet having a curvature.

8. The current sensing device according to claim 6, wherein the first measuring point and the second measuring point disposed adjacent to the slit protrude from the same side of the metal sheet in a radial direction.

9. The current sensing device of claim 1, wherein the first electrode and the second electrode are non-alloy material and the current shunt is alloy material.

10. The current sensing device of claim 1, wherein the first electrode and the second electrode are made of copper, and the current divider is made of manganese-copper alloy.

11. The current sensing device according to one of claims 1 to 10, further comprising: the heat dissipation element is supported on the periphery of the current shunt through the barrier, and the heat dissipation element is not in contact with the first electrode, the second electrode and the current shunt through the barrier.

12. The current sensing device of claim 11, further comprising: and the fan device is arranged at one end of the heat dissipation element so as to provide airflow for the heat dissipation element.