Current sensing module and device

Abstract

The utility model relates to a current sensing module and a current sensing device. The current sensing module comprises a body and a sensing element, the body comprises a through hole, and the through hole is configured to allow a current carrier of an input terminal to pass through; the sensing element is arranged on the body and electrically connected with a detection unit of a circuit board, and the sensing element is configured to sense the change of a magnetic field around the current carrier and transmit a sensed signal to the detection unit. The current sensing module is directly combined on the circuit board without additionally assembling a mechanism part for fixing the current sensing module, so that the installation mode can be simplified, and the assembling convenience of the current sensing module is improved.

Description

Technical Field

[0001] The present utility model relates to a sensing module and device, and particularly to a current sensing module and device for determining whether an arc occurs by detecting changes in the frequency domain and time domain. Background Art

[0002] Currently, the operation of electronic devices is required in various application fields. Among them, electrical detection, power consumption management, or monitoring of leakage abnormalities are all important items regarding the operation of electronic devices. In the management or monitoring items, current sensors are indispensable important components. For example, Rogowski coils are used as current sensors in distribution panels, etc. Further, an arc detection device is used to detect whether an arc occurs.

[0003] However, for the existing Rogowski coils arranged between a circuit board and a chassis, additional mechanical components are required for fixing. Among them, a DC input line is configured to pass through the Rogowski coil, and the output line of the Rogowski coil needs to be connected to the circuit board. Therefore, a lot of flying wires are arranged around the Rogowski coil. During the assembly process, the messy flying wires will cause inconvenience to the assembly mechanical components.

[0004] Therefore, in order to overcome the disadvantages and deficiencies in the prior art, it is necessary to provide an improved current sensing module to solve the problems existing in the above prior art. Summary of the Utility Model

[0005] In view of this, the main purpose of the present utility model is to provide a current sensing module. By directly combining the current sensing module on a circuit board, the mechanical components for fixing the current sensing module do not need to be additionally assembled, which can simplify the installation method and improve the convenience of its assembly.

[0006] To achieve the above object, the present utility model provides a current sensing module for assembling on a circuit board. The current sensing module includes a body and a sensing element. The body includes a through hole configured to allow a current carrier of an input terminal to pass through. The sensing element is disposed on the body, and the sensing element is electrically connected to a detection unit of the circuit board, wherein the sensing element is configured to sense changes in the magnetic field around the current carrier and transmit the sensed signal to the detection unit.

[0007] In an embodiment of the present utility model, the body is a high-permeability magnetic element, and the sensing element has a coil wound around the body.

[0008] In an embodiment of the present utility model, the current sensing module further includes a housing fixed on the circuit board, and the housing includes a first accommodating portion and a second accommodating portion that communicate with each other. The body is disposed in the first accommodating portion of the housing, and the output end of the sensing element is led out from the second accommodating portion and electrically connected to the detection unit.

[0009] In an embodiment of the present utility model, the current sensing module further includes a plurality of colloids, and these colloids are filled in the first accommodating portion and the second accommodating portion to fix the body and the sensing element.

[0010] In an embodiment of the present utility model, the housing further includes a fixing portion configured to be fixed on the circuit board.

[0011] In an embodiment of the present utility model, the body is a high-permeability magnetic element, and the sensing element is a Hall element fixed on the body.

[0012] In an embodiment of the present utility model, the current sensing module further includes a housing fixed on the circuit board, and the body is disposed in the housing.

[0013] In an embodiment of the present utility model, the sensing element includes a coil and an insulating layer covering the coil, and the body is a non-magnetic element fixed on the circuit board.

[0014] In an embodiment of the present utility model, the body has a connecting member configured to be mounted on the circuit board.

[0015] To achieve the above object, the present utility model provides a current sensing device, which includes a circuit board, an input terminal, and a current sensing module; the input terminal includes a current carrier configured to be electrically connected to a receiving unit of the circuit board; the current sensing module is assembled on the circuit board, and the current sensing module includes a body and a sensing element; the body has a through hole configured to allow the current carrier of the input terminal to pass through, the sensing element is disposed on the body and electrically connected to a detection unit of the circuit board; wherein the sensing element is configured to sense a change in the magnetic field around the current carrier and transmit the sensed signal to the detection unit.

[0016] As described above, by directly assembling the current sensing module on the circuit board, the current carrier can directly pass through the current sensing module for current sensing. Not only does it not require additional assembly of structural components for fixing the current sensing module, but there is also no complex flying wire configuration around the current sensing module, thereby simplifying the installation method of the current sensing device and improving the convenience of its assembly. Description of the Drawings

[0017] Figure 1 is a perspective view of an embodiment of the current sensing device according to the present utility model;

[0018] Figure 2 is according to Figure 1 a schematic diagram of the current sensing module of the current sensing device;

[0019] Figure 3 is according to Figure 2 a partial cross-sectional view of the sensing element of the current sensing device;

[0020] Figure 4 is a perspective view of partial components of another embodiment of the current sensing device according to the present utility model;

[0021] Figure 5 is a partial cross-sectional view of still another embodiment of the current sensing device according to the present utility model.

[0022]

Symbol Description

[0023] 2: Circuit board

[0024] 21: Receiving unit

[0025] 22: Detection unit

[0026] 3: Input terminal

[0027] 31: Current carrier

[0028] 4: Current sensing module

[0029] 41: Body

[0030] 411: Through hole

[0031] 42: Sensing element

[0032] 421: Coil

[0033] 422: Insulating layer

[0034] 423: Output terminal

[0035] 43: Housing

[0036] 431: Base

[0037] 432: Upper cover

[0038] 433: First accommodating portion

[0039] 434: Second accommodating portion

[0040] 435: Fixing portion

[0041] 44: Colloid

[0042] 45: Connector Detailed implementation manners

[0043] The descriptions of the following embodiments refer to the attached drawings, which are used to illustrate specific embodiments in which the present utility model can be implemented. Furthermore, the directional terms mentioned in the present utility model, such as up, down, top, bottom, front, back, left, right, inside, outside, side, surrounding, center, horizontal, transverse, vertical, longitudinal, axial, radial, the uppermost layer or the lowermost layer, etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for explaining and understanding the present utility model, rather than for limiting the present utility model.

[0044] Please refer to Figure 1 and Figure 2 shown Figure 1 FIG. is a perspective view of an embodiment of the current sensing device of the present utility model, Figure 2 is a schematic diagram of the current sensing module of the current sensing device according to Figure 1 , in which the current sensing device includes a circuit board 2, an input terminal 3 and a current sensing module 4. The detailed structures, relationships and principles of each part will be described in detail below.

[0045] Specifically, the input terminal 3 includes a current carrier 31, and the current carrier 31 is configured to be electrically connected to a receiving unit 21 of the circuit board 2. In this embodiment, the current carrier 31 of the input terminal 3 is configured to pass through the current sensing module 4 and the circuit board 2 and be joined and fixed in the receiving unit 21, so that the current carrier 31 is electrically connected to the receiving unit 21. In this embodiment, the current carrier 31 is assembled in the receiving unit 21 by means of screwing.

[0046] As Figure 1 and Figure 2 shown, in this embodiment, the current sensing module 4 is combined and fixed on the circuit board 2, and the current sensing module 4 includes a body 41 and a sensing element 42, wherein the sensing element 42 is disposed on the body 41.

[0047] Specifically, the body 41 has a through hole 411, the through hole 411 is configured to allow the current carrier 31 of the input terminal 3 to pass through, the sensing element 42 has a coil 421, the coil 421 of the sensing element 42 is disposed around the outer ring surface of the body 41, and two output terminals 423 of the sensing element 42 are electrically connected to a detection unit 22 of the circuit board 2, wherein the output terminal 423 is electrically connected to the coil 421, the sensing element 42 is configured to sense the change of the magnetic field around the current carrier 31 to generate a current, and transmit the current to the detection unit 22 of the circuit board 2.

[0048] Cooperating with Figure 3 shown Figure 3 is Figure 2Schematic diagram of the sensing element 42 of the current sensing module 4 of the current sensing device. In this embodiment, the body 41 is a high-permeability magnetic element, and the sensing element 42 has a coil 421 wound around the body 41. The coil 421 is directly fixed to the outer circumferential surface of the body 41. The coil 421 can sense the change of the magnetic field around the current carrier 31 to generate a current, and the detection unit 22 is configured to receive and detect the current induced by the coil 421.

[0049] Cooperate with Figure 1 And Figure 2 As shown, the current sensing module 4 further includes a housing 43 fixed to the circuit board 2. The housing 43 includes a base 431 and an upper cover 432 that can be combined together. The housing 43 further includes a first accommodating portion 433 and a second accommodating portion 434 defined by the base 431 and the upper cover 432. The first accommodating portion 433 and the second accommodating portion 434 communicate with each other. The body 41 is disposed in the first accommodating portion 433 of the housing 43, and the output end 423 of the sensing element 42 is led out from the second accommodating portion 434 and electrically connected to the detection unit 22. In this embodiment, the output end 423 of the sensing element 42 and the circuit board 2 can be combined by soldering, surface mount device (SMD), or dual in-line package process (DIP).

[0050] Specifically, the current sensing module 4 further includes a plurality of colloids 44. The colloids 44 are filled in the first accommodating portion 433 and the second accommodating portion 434 to fix the body 41 in the first accommodating portion 433 and fix the output end 423 of the sensing element 42 in the second accommodating portion 434, respectively.

[0051] Cooperate with Figure 1 And Figure 2 As shown, the housing 43 further includes a fixing portion 435. The fixing portion 435 is disposed on one side of the base 431. The fixing portion 435 is configured to be fixedly combined with the circuit board 2. In this embodiment, the fixing portion 435 can be fixed to the circuit board 2 by screwing or snapping, or directly welded to the circuit board 2 through the output end 423 located at the fixing portion 435, so that the position of the through hole 411 of the body 41 is opposite to the through hole (not shown) of the circuit board 2, so that the current carrier 31 can pass through the through hole 411 of the body 41 and the through hole of the circuit board 2 at the same time.

[0052] According to the above structure, by combining the current sensing module 4 with the circuit board 2, the primary current of the current carrier 31 passing through the through hole 411 of the body 41 and the through hole of the circuit board 2 can be converted. The two output terminals 423 of the sensing element 42 then transmit the secondary signal to the detection unit 22 for signal analysis, and whether there is an arc fault is determined by detecting the changes in the frequency domain and time domain of the current. When the detection unit 22 detects an arc fault, it can effectively interrupt the circuit to stop power supply, thereby avoiding the impact caused by the arc.

[0053] As shown above, by directly assembling the housing 43 of the current sensing module 4 on the circuit board 2, the current carrier 31 can directly pass through the current sensing module 4 for current sensing. Not only do we not need to additionally assemble the structural components for fixing the current sensing module 4, but there is also no complex jumper wire configuration around the current sensing module 4. Thus, the installation method of the current sensing device is simplified, and the convenience of its assembly is improved.

[0054] Please refer to Figure 4 shown in the figure, which is a schematic diagram of another embodiment of the current sensing device of the present utility model. The body 41 is a high-permeability magnetic element, and the sensing element 42 is a Hall element fixed on the body 41. In this embodiment, the Hall element will generate a Hall voltage corresponding to the magnetic field change around the current carrier and transmit it to the detection unit 22.

[0055] As Figure 5 shown, Figure 5 is a schematic diagram of yet another embodiment of the current sensing device of the present utility model. The sensing element 42 includes a coil 421 and an insulating layer 422 covering the coil 421. The body 41 is a non-magnetic element, and the body 41 is configured to be fixed on the circuit board 2. Specifically, the body 41 has a connecting member 45, and the connecting member 45 is configured to be installed on the circuit board 2, so there is no need to additionally provide a housing 43. In this embodiment, the connecting member 45 can be installed on the circuit board 2 by screwing or clamping, so that the body 41 is fixed on the circuit board 2.

[0056] As shown above, by directly joining the connecting member 45 of the current sensing module 4 to the circuit board 2, the current carrier 31 as Figure 1 shown can directly pass through the current sensing module 4 for current sensing. Not only do we not need to additionally assemble the structural components for fixing the current sensing module 4, but there is also no complex jumper wire configuration around the current sensing module 4. Thus, the installation method of the current sensing device is simplified, and the convenience of its assembly is improved.

[0057] Although the present utility model has been disclosed by way of examples, it is not intended to limit the present utility model. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the appended claims.

Claims

1. A current sensing module, characterized in that: Assembled on a circuit board, the current sensing module includes: a body including a through hole configured to allow a current carrier of an input terminal to pass through; and A sensing element is disposed on the body and electrically connected to a detection unit of the circuit board, wherein the sensing element is configured to sense the change of the magnetic field around the current carrier to generate current and transmit the current to the detection unit.

2. The current sensing module according to claim 1, characterized in that: The main body is a high-permeability magnetic element, and the induction element has a coil wound around the main body.

3. The current sensing module according to claim 2, characterized in that: The current sensing module further includes a shell fixed on the circuit board, and the shell includes a first accommodating portion and a second accommodating portion that are interconnected. The body is arranged in the first accommodating portion of the shell, and the output end of the sensing element is derived from the second accommodating portion and is electrically connected to the detection unit.

4. The current sensing module according to claim 3, characterized in that: The current sensing module further includes a plurality of colloids, and the plurality of colloids are filled in the first accommodation portion and the second accommodation portion to fix the body and the sensing element.

5. The current sensing module according to claim 3, characterized in that: The housing further comprises a fixing portion, and the fixing portion is configured to be fixed on the circuit board.

6. The current sensing module according to claim 1, characterized in that: The main body is a high-permeability magnetic element, and the sensing element is a Hall element fixed on the main body.

7. The current sensing module according to claim 6, characterized in that: The current sensing module further comprises a shell fixed on the circuit board, and the body is arranged in the shell.

8. The current sensing module according to claim 1, characterized in that: The induction element comprises a coil and an insulating layer covering the coil, and the body is a non-magnetic conductive element fixed on the circuit board.

9. The current sensing module according to claim 8, characterized in that: The body has a connecting piece, and the connecting piece is configured to be mounted on the circuit board.

10. A current sensing device, characterized in that: include: a circuit board; an input terminal including a current carrier configured to be electrically connected to a receiving unit of the circuit board; and A current sensing module is assembled on the circuit board, and the current sensing module includes: a body having a through hole, the through hole is configured to allow the current carrier of the input terminal to pass through; and a sensing element is disposed on the body and electrically connected to a detection unit of the circuit board; wherein the sensing element is configured to sense changes in the magnetic field around the current carrier and transmit the induced signal to the detection unit.

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