Overcurrent loop structure of current sensor
By adopting a series structure in the current sensor overcurrent circuit, the problems of high heating rate and difficult processing in the prior art are solved, and the effects of reducing heating power, extending service life and reducing processing difficulty are achieved.
Patent Information
- Application Number
- CN202421372164.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-17
AI Technical Summary
In the existing current sensor overcurrent circuit structure, the main copper tray carries three times the current, resulting in a high heating rate, and it is necessary to increase the material to reduce costs. At the same time, the length and cross-sectional area of the branch copper tray must be the same, which increases the processing difficulty.
Using a series structure, a series circuit is formed through the first copper row and the second copper row. The current flows from the positive electrode through the first copper row to the negative electrode, avoiding the need to increase the current flow, reducing the heating power of the copper row, and making the current value flowing through the same, reducing the processing difficulty.
It reduces the heating power of the copper flask, extends the service life, while reducing processing difficulty and cost, and ensuring the accuracy of the test.
Smart Images
Figure CN222654514U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of current sensor equipment, in particular to a current sensor overcurrent loop structure. Background Art
[0002] like Figure 1 As shown, the copper busbar in the conventional current sensor overcurrent structure is a parallel structure in which a main copper busbar 11 is bifurcated into three branch copper buses 12. When the current sensor is inserted into the copper busbar, the connector extends out to connect the three branch copper buses 12 to form a loop. The positive electrode of the current flows from the main road into the main copper busbar 11, flows through the three branch copper buses 12, and then merges into the main road and flows out.
[0003] According to Newton's formula I 2 *R=Kt*A*ΔT, it can be obtained that the heating rate ΔT of the copper bar is proportional to the square of the current I. The main copper bar 11 of the existing copper bar structure carries three times the current than the branch copper bar 12, and the heating rate is 9 times that of the branch copper bar 12. If it is to be used normally, the cross-sectional area of the main copper bar 11 must be increased, which consumes a lot of materials and is costly.
[0004] In addition, to ensure that the currents divided by the three branch copper bars 12 in parallel are equal, the resistance values of the three branch copper bars 12 must be the same. According to the calculation formula of the copper bar resistance R=ρ*L / A, the lengths and cross-sectional areas of the three branch copper bars 12 must be the same, which greatly increases the difficulty of copper bar processing. Utility Model Content
[0005] An embodiment of the present application provides a current sensor over-current circuit structure, which does not require increasing the amount of current flowing through the copper busbar, can greatly reduce heat generation power, extend the service life of the copper busbar, and can also effectively reduce the processing difficulty of the copper busbar.
[0006] The present application provides a current sensor overcurrent circuit structure, including:
[0007] A current sensor, wherein the current sensor is provided with a first loop hole, a second loop hole and a third loop hole in sequence along a length direction;
[0008] A copper busbar, the copper busbar comprising a first copper busbar extending in a straight line and a second copper busbar distributed in a U-shape, the first copper busbar passing through the first loop hole and having a first end for connecting to the positive electrode and a second end located at the other side of the current sensor, the second copper busbar having a first arm and a second arm, the first arm and the second arm respectively passing through the second loop hole and the third loop hole and extending to the other side of the current sensor, the ends of the first arm and the second arm extending to the other side of the current sensor are defined as a conductive end and a connecting end, respectively, the conductive end, the connecting end and the second end are all located on the same side of the current sensor, and the connecting end is used to connect to the negative electrode;
[0009] A connecting piece is matched with the current-carrying copper busbar in a manner that the connecting piece can be driven to be directionally moved to electrically connect the conductive end and the second end.
[0010] In a possible implementation manner, the first loop hole is close to any end of the current sensor in the length direction.
[0011] In a possible implementation, the connecting member is located below the current-carrying copper busbar;
[0012] The current sensor over-current circuit structure also includes a cylinder, which is located below the connecting piece, and the piston rod of the cylinder is vertically fixedly connected to the connecting piece, so that after the over-current copper busbar passes through the current sensor, the connecting piece can be driven by the piston rod to connect the conductive end and the second end.
[0013] In a possible implementation manner, the connecting element is implemented as a gasket.
[0014] In a possible implementation, in a length direction of the first copper bar, the first copper bar and the second copper bar are equal in length.
[0015] Beneficial effect: Compared with the prior art, the current sensor over-current circuit structure provided by the present application improves the original one-to-three parallel structure into a series structure formed by the first copper bar and the second copper bar, which can not only meet the over-current of the current sensor, but also does not need to increase the current flowing through the copper bar, which can greatly reduce the heating power of the copper bar and extend the service life of the copper bar. In addition, the series structure makes the current values of the first copper bar and the second copper bar the same, and there is no need to consider the stringent requirement that the length and cross-sectional area of the conventional three copper bars need to be kept consistent, which can effectively reduce the processing difficulty of the copper bar and ensure the accuracy of the test.
[0016] These and other purposes, features and advantages of the present invention are fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The schematic diagram of the structure of the overcurrent circuit structure of the current sensor in the prior art is shown.
[0018] Figure 2 A three-dimensional structural schematic diagram of a current sensor overcurrent circuit structure in a preferred embodiment of the present application is shown.
[0019] Figure 3 A schematic diagram of a top view of a current sensor overcurrent circuit structure according to a preferred embodiment of the present application is shown. DETAILED DESCRIPTION
[0020] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.
[0021] Those skilled in the art should understand that, in the disclosure of the specification, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.
[0022] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.
[0023] refer to Figure 2 and Figure 3A current sensor over-current circuit structure according to a preferred embodiment of the utility model will be described in detail below, wherein the current sensor over-current circuit structure includes a current sensor 20, an over-current copper busbar and a connector 30, wherein the current sensor 20 is sequentially provided with a first loop hole 201, a second loop hole 202 and a third loop hole 203 along the length direction, wherein the over-current copper busbar includes a first copper busbar 41 extending in a straight line and a second copper busbar 42 distributed in a U shape, wherein the first copper busbar 41 passes through the first loop hole 201 and has a first end 411 for connecting to the positive electrode and a second end 412 located on the other side of the current sensor 20, and the second copper busbar 42 has a first arm 421 and a second arm 422, and the first arm 421 and the second arm 422 respectively pass through the second loop hole 202 and the third loop hole 203 and extend to the other side of the current sensor 20. The ends of the first arm 421 and the second arm 422 extending to the other side of the current sensor 20 are defined as a conductive end 4211 and a connecting end 4221, respectively, wherein the conductive end 4211, the connecting end 4221 and the second end 412 are all located on the same side of the current sensor 20, and the connecting end 4221 is used to connect the negative electrode. In addition, the connecting member 30 cooperates with the current copper busbar in a manner that it can be driven to move in a directional manner to electrically connect the conductive end 4211 and the second end 412.
[0024] The current flows from the positive electrode through the first end 411 through the first copper bar 41, and then flows into the connector 30 through the second end 412, flows to the conductive end 4211 through the connector 30, and then flows through the second copper bar 42 along the U-shape to the connecting end 4221, and finally flows into the negative electrode from the connecting end 4221 to form a complete loop. The design of the first copper bar 41 and the second copper bar 42 can not only meet the over-current of the current sensor 20, but also the series structure formed by the first copper bar 41, the second copper bar 42 and the connector 30 no longer needs to increase the current flowing through the copper bar, which can effectively reduce the heating power of the copper bar, thereby extending the service life of the copper bar. In addition, the series structure makes the current values flowing through the first copper bar 41 and the second copper bar 42 equal, which can ensure the accuracy of the test, and at the same time can also reduce the processing difficulty of the copper bar, and there is no need to excessively consider the stringent requirement that the length and cross-sectional area must be equal.
[0025] In one embodiment, the first loop hole 201 is close to any end of the length direction of the current sensor 20, that is, in the length direction of the current sensor 20, the first copper bus 41 can be close to one end or the other end without being affected.
[0026] In one embodiment, the connecting member 30 is located below the copper busbar;
[0027] In addition, the current sensor over-current circuit structure also includes a cylinder (not shown in the figure), which is located below the connecting member 30, and the piston rod of the cylinder is vertically fixedly connected to the connecting member 30, thereby driving the connecting member 30 to move by the cylinder, so that after the over-current copper busbar passes through the current sensor 20, the connecting member 30 can be driven by the piston rod to connect the conductive end 4211 and the second end 412, which is convenient to control and easy to maintain.
[0028] In one embodiment, the connecting element 30 is implemented as a gasket.
[0029] In one embodiment, in the length direction of the first copper bar 41, the lengths of the first copper bar 41 and the second copper bar 42 are equal, which not only facilitates the installation of the first copper bar 41 and the second copper bar 42, but also facilitates the connection of the first copper bar 41 and the second copper bar 42 by the connector 30.
[0030] It should be noted that the terms "first, second" in the present invention are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.
[0031] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.
Claims
1. The current sensor overcurrent circuit structure is characterized by: include: A current sensor, wherein the current sensor is provided with a first loop hole, a second loop hole and a third loop hole in sequence along a length direction; A copper busbar, the copper busbar comprising a first copper busbar extending in a straight line and a second copper busbar distributed in a U-shape, the first copper busbar passing through the first loop hole and having a first end for connecting to the positive electrode and a second end located at the other side of the current sensor, the second copper busbar having a first arm and a second arm, the first arm and the second arm respectively passing through the second loop hole and the third loop hole and extending to the other side of the current sensor, the ends of the first arm and the second arm extending to the other side of the current sensor are defined as a conductive end and a connecting end, respectively, the conductive end, the connecting end and the second end are all located on the same side of the current sensor, and the connecting end is used to connect to the negative electrode; A connecting piece is matched with the current-carrying copper busbar in a manner that the connecting piece can be driven to be directionally moved to electrically connect the conductive end and the second end.
2. The current sensor overcurrent circuit structure according to claim 1, characterized in that: The first loop hole is close to any end of the current sensor in the length direction.
3. The current sensor overcurrent circuit structure according to claim 1, characterized in that: The connecting piece is located below the current copper busbar; The current sensor over-current circuit structure also includes a cylinder, which is located below the connecting piece, and the piston rod of the cylinder is vertically fixedly connected to the connecting piece, so that after the over-current copper busbar passes through the current sensor, the connecting piece can be driven by the piston rod to connect the conductive end and the second end.
4. The current sensor overcurrent circuit structure as claimed in claim 3, characterized in that: The connecting element is designed as a spacer.
5. The current sensor overcurrent circuit structure according to claim 1, characterized in that: In the length direction of the first copper bar, the first copper bar and the second copper bar are equal in length.