Open-close type passive alternating current transmitter

Abstract

The utility model relates to the technical field of current transmitters, in particular to an open-close type passive alternating current transmitter. The open-close type passive alternating current transmitter comprises a transmitter body, a matching cover is rotatably arranged on the top of the transmitter body, a first groove body is formed in the top of the transmitter body in the length direction, a second groove body is correspondingly formed in the bottom of the matching cover, a first iron core with an opening in one end is arranged at the transmitter body, and a second iron core with an opening in one end is correspondingly arranged at the matching cover. When the matching cover covers the top of the transmitter main body, the opening end of the first iron core is correspondingly matched with the opening end of the second iron core, the first iron core is sleeved with a coil, the bottom of the coil is provided with a circuit board, and the circuit board is electrically connected with the coil. Self-induction power supply is realized through a closed magnetic circuit structure generated by the first iron core and the second iron core, so that an external power supply is completely not needed, and the power supply deployment cost and the operation and maintenance complexity are reduced.

Description

Technical Field

[0001] This utility model relates to the field of current transmitter technology, and more specifically, to an openable passive AC current transmitter. Background Technology

[0002] AC current transmitters are key sensing devices widely used in industrial automation, power monitoring, and smart power distribution. Their main function is to convert AC current signals in the power grid into standardized DC signals so that backend control systems or instruments can perform real-time monitoring, analysis, and control.

[0003] However, most mainstream switchable AC current transmitters on the market currently suffer from the limitation of relying on an external power supply. These transmitters typically require a separate DC or AC power source (such as 24V DC or 220V AC), which not only increases wiring complexity but can also significantly increase power deployment costs in scenarios with limited installation space or a large number of distributed monitoring nodes. Utility Model Content

[0004] This invention provides an openable passive AC current transmitter that overcomes some or all of the defects of the prior art.

[0005] According to an embodiment of the present invention, the openable passive AC current transmitter includes a transmitter body, a mating cover rotatably provided on the top of the transmitter body, a first groove formed along the length direction on the top of the transmitter body, a second groove correspondingly formed at the bottom of the mating cover, a first iron core with one open end provided at the transmitter body, and a second iron core with one open end correspondingly provided at the mating cover. When the mating cover covers the top of the transmitter body, the open ends of the first iron core and the open ends of the second iron core are mated. A coil is sleeved on the first iron core, and a circuit board is provided at the bottom of the coil. The circuit board is electrically connected to the coil.

[0006] In a preferred embodiment of this utility model, the transmitter body includes a detachable base and a housing. The base is provided with first buckles around its perimeter, which are used to engage with the outer wall of the housing.

[0007] In a preferred embodiment of this utility model, one end of the cover is open to form a mating cavity, and a plurality of second buckles are formed on the inner wall of the mating cavity. The second buckles are used to mate with the second iron core.

[0008] In a preferred embodiment of this utility model, a plurality of springs are provided on the bottom wall of the cavity, and the plurality of springs abut against the second iron core.

[0009] In a preferred embodiment of this utility model, one end of the opening of the cover is hinged to the transmitter body in the width direction, and the other end is provided with a third buckle, which is used to detachably engage with the transmitter body.

[0010] In a preferred embodiment of this utility model, a connection interface is provided on one side of the circuit board, and a corresponding mating groove is formed on the housing, which is used to conformally mate with the connection interface.

[0011] In a preferred embodiment of this utility model, a mounting bracket is provided between the coil and the first iron core, and the mounting bracket is conformally fitted to the first iron core.

[0012] In a preferred embodiment of this utility model, a positioning post is formed at the bottom of the mounting bracket, and a corresponding positioning hole is formed on the circuit board. The positioning post is used to cooperate with the positioning hole.

[0013] Beneficial effects:

[0014] The openable passive AC current transmitter in this embodiment of the invention achieves self-induction power supply through the closed magnetic circuit structure generated by the first iron core and the second iron core. Therefore, it does not require an external power supply, reducing the power supply deployment cost and maintenance complexity.

[0015] Furthermore, the snap-fit ​​design of the base and housing effectively simplifies the assembly process.

[0016] In addition, the integrated passive design reduces the number of external components, lowers hardware costs and installation space requirements, making it particularly suitable for distributed deployment scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the isometric structure of the openable passive AC current transmitter in at least one embodiment of the present invention.

[0018] Figure 2 This is an exploded structural diagram of the openable passive AC current transmitter in at least one embodiment of the present invention.

[0019] Figure 3 This is an example of an openable passive AC current transmitter circuit in at least one embodiment of the present invention. Detailed Implementation

[0020] The accompanying drawings in this utility model are not drawn strictly according to the actual scale. The number of the first iron core 3, the second iron core 4, the number of coils 5, the number of the first buckle 111, the second buckle 23, and the third buckle 24 are not limited to the quantities shown in the drawings. The specific dimensions and quantities of each structure can be determined according to actual needs.

[0021] Seen in Figure 1-2The openable passive AC current transmitter provided in this embodiment includes a transmitter body 1 and a mating cover 2 rotatably disposed on its top. A first groove 11 is formed on the top of the transmitter body 1 along the length direction, and a second groove 21 is formed on the bottom of the mating cover 2. When the mating cover 2 is closed, the first groove 11 and the second groove 21 together form a limit on the monitored cable.

[0022] The transmitter body 1 has a first iron core 3 and a second iron core 4 built into its top and the mating cover 2, respectively. A coil 5 is fitted into the first iron core 3, and a circuit board 6 is provided at the bottom of the coil 5. The circuit board 6 is electrically connected to the coil 5. When the mating cover 2 is closed, the open ends of the two iron cores are connected to form a closed magnetic circuit, which greatly improves the magnetic flux utilization rate. This allows the coil 5 to directly induce a voltage signal through the alternating magnetic field generated by the measured current. The coil 5 is electrically connected to the circuit board, and the voltage signal is processed by the circuit board 6 to generate a standardized electrical signal. A connection interface 61 is provided on one side of the circuit board 6. The connection interface 61 is used to connect signal lines, thereby outputting a standardized electrical signal to the host computer.

[0023] Therefore, by achieving self-induction power supply through a closed magnetic circuit structure, no external power supply is required, reducing power deployment costs and maintenance complexity, and solving the problem of power supply dependence in traditional transmitters.

[0024] Furthermore, the transmitter body 1 includes a detachable base 11 and a housing 12. The base 11 is provided with first buckles 111 around its perimeter, which are used to engage with the outer wall of the housing 12.

[0025] In some embodiments, the mating cover 2 has an opening at one end to form a mating cavity 22, and a plurality of second buckles 23 are formed on the inner wall of the mating cavity 22. The second buckles 23 are used to engage with the second iron core 4. A plurality of springs 7 are provided on the bottom wall of the mating cavity 22. The plurality of springs 7 abut against the second iron core 4 to ensure a tight fit between the second iron core 4 and the mating cover 2.

[0026] In some embodiments, one end of the cover 2 is hinged to the transmitter body 1, and the other end is locked by the third buckle 24, thereby enabling one-handed operation for opening and closing and simplifying the installation process.

[0027] In some embodiments, a mating groove 121 is formed at the housing 12 corresponding to the connection interface 61, and the mating groove 121 is used to conformally mate with the connection interface 61.

[0028] In some embodiments, a mounting bracket 8 is provided between the coil 5 and the first iron core 3. The mounting bracket 8 conforms to the first iron core 3. A positioning post 81 is formed at the bottom of the mounting bracket 8, and a positioning hole 62 is formed on the circuit board 6. The positioning post 81 is used to cooperate with the positioning hole 62, thereby ensuring the structural stability between the mounting bracket 8 and the circuit board 6.

[0029] When using this open-type passive AC current transmitter, when the cable under test passes through the closed magnetic circuit formed by the first iron core 3 and the second iron core 4, the coil 5 generates a voltage signal proportional to the current amplitude through electromagnetic induction. The circuit board 6 converts the voltage signal into a standardized electrical signal and outputs it from the connection interface 61 through the 485 circuit.

[0030] Seen in Figure 3 This utility model also provides a switchable passive AC current transmitter circuit.

[0031] Specifically, the bridge rectifier DB1 is responsible for rectifying the small AC current signal into a DC signal. Resistors R1, R2, R3, R4, R5, R8 and potentiometer U1 form a sampling circuit to convert the DC current signal into a voltage signal. Among them, potentiometer U1 plays the role of fine-tuning the voltage amplitude.

[0032] Furthermore, capacitors C1 and C2, inductors L1 and L2, and capacitors C3 and C4 constitute a π-type filter circuit, and TVS diode D1 serves as an output voltage clamping protection.

[0033] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

Claims

1. A switchable passive AC current transmitter, characterized in that, The transmitter includes a transmitter body, a mating cover rotatably mounted on the top of the transmitter body, a first groove formed along the length of the top of the transmitter body, and a second groove correspondingly formed at the bottom of the mating cover. A first iron core with one open end is provided at the transmitter body, and a second iron core with one open end is provided correspondingly at the mating cover. When the mating cover covers the top of the transmitter body, the open ends of the first iron core and the open ends of the second iron core are mated together. A coil is sleeved on the first iron core, and a circuit board is provided at the bottom of the coil. The circuit board is electrically connected to the coil.

2. The openable passive AC current transmitter according to claim 1, characterized in that, The transmitter body includes a detachable base and a housing. The base is provided with first buckles around its perimeter, which are used to engage with the outer wall of the housing.

3. The openable passive AC current transmitter according to claim 1, characterized in that, The cover has an opening at one end to form a mating cavity, and multiple second snaps are formed on the inner wall of the mating cavity. The second snaps are used to mate with the second iron core.

4. The openable passive AC current transmitter according to claim 3, characterized in that, The bottom wall of the cavity is provided with multiple springs, which abut against the second iron core.

5. The openable passive AC current transmitter according to claim 1, characterized in that, The opening of the cover is hinged to the transmitter body at one end in the width direction, and a third buckle is provided at the other end. The third buckle is used to detachably engage with the transmitter body.

6. The openable passive AC current transmitter according to claim 2, characterized in that, A connection interface is provided on one side of the circuit board, and a corresponding mating groove is formed on the housing. The mating groove is used to conformally mate with the connection interface.

7. The openable passive AC current transmitter according to claim 1, characterized in that, A mounting bracket is provided between the coil and the first iron core, and the mounting bracket is conformally fitted to the first iron core.

8. The openable passive AC current transmitter according to claim 7, characterized in that, The mounting bracket has a positioning post at the bottom, and a corresponding positioning hole is formed on the circuit board. The positioning post is used to mate with the positioning hole.

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