CN217034076U - Wireless current transformer - Google Patents
Wireless current transformer Download PDFInfo
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- CN217034076U CN217034076U CN202220472263.2U CN202220472263U CN217034076U CN 217034076 U CN217034076 U CN 217034076U CN 202220472263 U CN202220472263 U CN 202220472263U CN 217034076 U CN217034076 U CN 217034076U
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Abstract
The embodiment of the utility model discloses a wireless current transformer. The wireless current transformer comprises: electromagnetic induction and energy output components, batteries and circuit boards; the circuit board is provided with a controller and a voltage-current conversion circuit, the controller is electrically connected with the electromagnetic induction and energy output component and the battery, and the voltage-current conversion circuit is electrically connected with the electromagnetic induction and energy output component and the controller; the voltage and current conversion circuit is used for converting alternating current output by the electromagnetic induction and energy output component into alternating voltage, the controller is used for determining a current value of corresponding alternating current according to the alternating voltage and outputting the current value, and the controller is powered by a battery or electric energy output by the electromagnetic induction and energy output component. The wireless current transformer provided by the embodiment of the utility model can save electric energy and resources.
Description
Technical Field
The embodiment of the utility model relates to a transformer technology, in particular to a wireless current transformer.
Background
The current transformer is used as an important device for collecting line current and has wide application in a plurality of fields. Current transformer includes wired and wireless form, and wherein wired transmission formula current transformer has the lead wire output, can have shortcomings such as installation inflexibility, power failure installation, compares, and wireless current transformer has the installation flexibility, need not advantages such as power failure installation, and its application is also more and more extensive.
At present, the existing wireless current transformer is usually supplied with power by a power supply alone, current transmitted in a circuit is sensed in a working state, and voltage output by the power supply needs to meet voltage required by normal working of the wireless current transformer, so that the energy-saving effect of the wireless current transformer is poor.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a wireless current transformer, which is used for saving electric energy and resources.
The embodiment of the utility model provides a wireless current transformer, which comprises: electromagnetic induction and energy output components, batteries and circuit boards;
the circuit board is provided with a controller and a voltage-current conversion circuit, the controller is electrically connected with the electromagnetic induction and energy output part and the battery, and the voltage-current conversion circuit is electrically connected with the electromagnetic induction and energy output part and the controller;
the voltage and current conversion circuit is used for converting alternating current output by the electromagnetic induction and energy output component into alternating voltage, the controller is used for determining a current value of corresponding alternating current according to the alternating voltage and outputting the current value, and the controller is powered by a battery or electric energy output by the electromagnetic induction and energy output component.
Optionally, the circuit board is further provided with a resonant circuit, a change-over switch and a super capacitor, the electromagnetic induction and energy output component, the resonant circuit and the change-over switch are electrically connected in sequence, the change-over switch is electrically connected with the controller through the super capacitor, and the change-over switch is further electrically connected with the controller through the voltage-current conversion circuit.
Optionally, the change-over switch includes a first end, a second end and a control end, the first end of the change-over switch is electrically connected to the super capacitor, the second end of the change-over switch is electrically connected to the voltage-current conversion circuit, and the control end of the change-over switch is electrically connected to the controller.
Optionally, a rectifier bridge is further arranged on the circuit board, the change-over switch is electrically connected with the super capacitor through the rectifier bridge, and the rectifier bridge is used for rectifying alternating current and providing electric energy for the super capacitor.
Optionally, a power switching module is further arranged on the circuit board, the battery and the super capacitor are both electrically connected with the controller through the power switching module, and the power switching module is used for switching the battery or the super capacitor to supply power to the controller.
Optionally, a voltage holding module is further disposed on the circuit board, the super capacitor is electrically connected to the power supply switching module through the voltage holding module, and the voltage holding module controls the on-off state of a path between the super capacitor and the power supply switching module according to the voltage of the super capacitor.
Optionally, the electromagnetic induction and energy output part comprises an upper magnetic core, a lower magnetic core and a magnetic core skeleton, current is transmitted between the upper magnetic core and the lower magnetic core through magnetic induction, and the lower magnetic core and the magnetic core skeleton are integrally arranged.
Optionally, the electromagnetic induction and energy output component further comprises a housing upper cover, a housing lower cover and a lower magnetic core cover plate, the upper magnetic core is arranged on the housing upper cover, the lower magnetic core is arranged on the housing lower cover, and the housing upper cover and the lower magnetic core cover plate are both mechanically connected with the housing lower cover.
Optionally, the wireless current transformer further comprises a spring, and the upper cover of the housing is connected with the upper magnetic core through the spring.
Optionally, the wireless current transformer further comprises a battery box and a battery cover, the battery cover is mechanically connected with the battery box, and the battery is arranged in the battery box.
The wireless current transformer provided by the embodiment of the utility model comprises an electromagnetic induction and energy output part, a battery and a circuit board; the circuit board is provided with a controller and a voltage-current conversion circuit, the controller is electrically connected with the electromagnetic induction and energy output part and the battery, and the voltage-current conversion circuit is electrically connected with the electromagnetic induction and energy output part and the controller; the voltage and current conversion circuit is used for converting alternating current output by the electromagnetic induction and energy output component into alternating voltage, the controller is used for determining a current value of corresponding alternating current according to the alternating voltage and outputting the current value, and the controller is powered by a battery or electric energy output by the electromagnetic induction and energy output component. According to the wireless current transformer provided by the embodiment of the utility model, the electric energy output by the battery or the electromagnetic induction and energy output component supplies power to the controller, when the current value of the alternating current output by the electromagnetic induction and energy output component reaches the preset current value, the electric energy output by the electromagnetic induction and energy output component supplies power to the controller, and at the moment, the battery is not needed to supply power, so that the electric energy can be saved, and the resources can be saved.
Drawings
Fig. 1 is a schematic structural diagram of a wireless current transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another wireless current transformer provided in an embodiment of the present invention;
fig. 3 is a block diagram of a wireless current transformer according to an embodiment of the present invention.
The reference numbers in the figures are as follows:
10-electromagnetic induction and energy output components; 11-an upper magnetic core; 12-a lower magnetic core; 13-a magnetic core skeleton; 14-a housing upper cover; 15-lower cover of the shell; 20-a battery; 30-a circuit board; 31-a controller; 32-a voltage current conversion circuit; 33-a resonant circuit; 34-a diverter switch; 35-a super capacitor; 36-a rectifier bridge; 37-power switching module; 38-a voltage holding module; 39-LDO power supply; 391-a power supply monitoring module; 392-a key module; 40-a spring; 50-a battery box; 60-cell cover.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not to be construed as limiting the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a wireless current transformer provided in an embodiment of the present invention, fig. 2 is a schematic structural diagram of another wireless current transformer provided in an embodiment of the present invention, and fig. 3 is a block structural diagram of a wireless current transformer provided in an embodiment of the present invention. Referring to fig. 1, 2 and 3, the wireless current transformer includes: electromagnetic induction and energy output means 10, battery 20 and wiring board 30.
Wherein, the circuit board 30 is provided with a controller 31 and a voltage-current conversion circuit 32, the controller 31 is electrically connected with the electromagnetic induction and energy output component 10 and the battery 20, and the voltage-current conversion circuit 32 is electrically connected with the electromagnetic induction and energy output component 10 and the controller 31; the voltage-current conversion circuit 32 is configured to convert the ac current output by the electromagnetic induction and energy output component 10 into an ac voltage, the controller 31 determines a current value of the corresponding ac current according to the ac voltage and outputs the current value, and the controller 31 is powered by the battery 20 or the electric energy output by the electromagnetic induction and energy output component 10.
Specifically, the wireless current transformer has a wireless transceiving function and can reach a communication distance of more than 100 meters. The wireless current transformer induces an alternating current on a line through the electromagnetic induction and energy output part 10, the electromagnetic induction and energy output part 10 transmits the induced alternating current to the voltage-current conversion circuit 32, the voltage-current conversion circuit 32 converts the alternating current into an alternating voltage, the controller 31 can obtain an effective value of the alternating voltage, determine a corresponding effective value of the alternating current according to the effective value, and output the effective value of the alternating current. The wireless current transformer may transmit the effective value of the ac current determined by the controller 31 to a DCU unit communicatively coupled to the wireless current transformer for the purpose of collecting line current. Moreover, the controller 31 may be powered by the battery 20 or by the electric energy output by the electromagnetic induction and energy output part 10, for example, when the current value of the alternating current output by the electromagnetic induction and energy output part 10 reaches a preset current value (the minimum starting current value of the controller 31), the electric energy output by the electromagnetic induction and energy output part 10 supplies power to the controller 31, and at this time, the battery 20 is not needed to supply power, so that the electric energy can be saved, and the resource can be saved.
The wireless current transformer provided by the embodiment comprises an electromagnetic induction and energy output part, a battery and a circuit board; the circuit board is provided with a controller and a voltage-current conversion circuit, the controller is electrically connected with the electromagnetic induction and energy output part and the battery, and the voltage-current conversion circuit is electrically connected with the electromagnetic induction and energy output part and the controller; the voltage and current conversion circuit is used for converting alternating current output by the electromagnetic induction and energy output component into alternating voltage, the controller is used for determining the current value of the corresponding alternating current according to the alternating voltage and outputting the current value, and the controller is powered by the battery or electric energy output by the electromagnetic induction and energy output component. According to the wireless current transformer provided by the embodiment, the electric energy output by the battery or the electromagnetic induction and energy output part is used for supplying power to the controller, when the current value of the alternating current output by the electromagnetic induction and energy output part reaches the preset current value, the electric energy output by the electromagnetic induction and energy output part is used for supplying power to the controller, at the moment, the battery is not needed for supplying power, the electric energy can be saved, and the resources are saved.
Optionally, the circuit board 30 is further provided with a resonant circuit 33, a switch 34 and a super capacitor 35, the electromagnetic induction and energy output component 10, the resonant circuit 33 and the switch 34 are electrically connected in sequence, the switch 34 is electrically connected to the controller 31 through the super capacitor 35, and the switch 34 is further electrically connected to the controller 31 through the voltage-current conversion circuit 32.
Illustratively, the resonant circuit 33 includes a magnetic core wound coil and an input capacitor, the resonant circuit 33 may be an LC resonant circuit, and the operation principle of the resonant circuit 33 may refer to the LC resonant principle, which is not described herein again. The resonant circuit 33 raises the voltage amplitude of the voltage output by the electromagnetic induction and energy output component 10, so as to improve the energy storage efficiency of the super capacitor 35. Referring to fig. 3, the controller 31 may control the switch 34 to connect the resonant circuit 33 and the super capacitor 35, or control the switch 34 to connect the resonant circuit 33 and the voltage-current converting circuit 32. After the controller 31 collects the signal, the controller 31 controls the switch 34 to connect the resonant circuit 33 and the circuit of the super capacitor 35, the super capacitor 35 starts to charge, when the voltage of the super capacitor 35 reaches the preset voltage value, the super capacitor 35 supplies power to the controller 31, the controller 31 controls the switch 34 to connect the resonant circuit 33 and the line where the voltage-current conversion circuit 32 is located, the a/D terminal of the controller 31 collects the alternating voltage output by the voltage-current conversion circuit 32, the AC/DC conversion is carried out on the voltage to obtain the effective value of the alternating voltage, the charging process of the super capacitor 35 is interrupted at the moment, the controller 31 finishes one-time complete metering acquisition and transmission and then controls the selector switch 34 to connect the resonant circuit 33 and the line where the super capacitor 35 is located, the super capacitor 35 is charged, with the circulation, the super capacitor 35 supplies power to the controller 31 and the signal acquisition of the controller 31 is realized.
Optionally, the switch 34 includes a first terminal, a second terminal, and a control terminal, the first terminal of the switch 34 is electrically connected to the super capacitor 35, the second terminal of the switch 34 is electrically connected to the voltage-current conversion circuit 32, and the control terminal of the switch 34 is electrically connected to the controller 31.
Specifically, referring to fig. 3, a first terminal of the switch 34 is electrically connected to the controller 31 through the super capacitor 35, a second terminal of the switch 34 is electrically connected to the controller 31 through the voltage-current converting circuit 32, and the controller 31 can transmit a switch control signal to a control terminal of the switch 34, so as to control the conducting state of the switch 34.
Optionally, a rectifier bridge 36 is further disposed on the circuit board 30, the switch 34 is electrically connected to the super capacitor 35 through the rectifier bridge 36, and the rectifier bridge 36 is configured to rectify the alternating current and provide electric energy for the super capacitor 35.
Illustratively, the rectifier bridge 36 may be composed of four diodes, and the rectifier bridge 36 may convert an ac voltage, such as an ac voltage having a sine wave waveform, into a dc voltage having a regulated waveform, so that the super capacitor 35 inputs the dc voltage for charging.
Optionally, a power switching module 37 is further disposed on the circuit board 30, the battery 20 and the super capacitor 35 are both electrically connected to the controller 31 through the power switching module 37, and the power switching module 37 is configured to switch the battery 20 or the super capacitor 35 to supply power to the controller 31.
The power switching module 37 can automatically switch the battery 20 to supply power to the controller 31 or the super capacitor 35 to supply power to the controller 31. For example, when the power switching module 37 determines that the voltage of the super capacitor 35 is smaller than the preset voltage value, the path where the battery 20 and the controller 31 are located is controlled to be on, the path where the super capacitor 35 and the controller 31 are located is controlled to be off, and the battery 20 supplies power to the controller 31. When the power supply switching module 37 determines that the voltage of the super capacitor 35 is greater than the preset voltage value, the path where the battery 20 and the controller 31 are located is controlled to be disconnected, the path where the super capacitor 35 and the controller 31 are located is controlled to be connected, the super capacitor 35 supplies power to the controller 31, and electric energy of the battery 20 is saved.
Optionally, a voltage holding module 38 is further disposed on the circuit board 30, the super capacitor 35 is electrically connected to the power supply switching module 37 through the voltage holding module 38, and the voltage holding module 38 controls the on-off state of a path between the super capacitor 35 and the power supply switching module 37 according to the voltage of the super capacitor 35.
Specifically, in the charging stage of the super capacitor 35, in order to prevent the super capacitor 35 from supplying power to the controller 31 and the voltage of the super capacitor 35 is too low to reach the normal operating voltage range of the controller 31, voltage maintenance is required. When the voltage of the super capacitor 35 reaches the preset voltage value, the voltage holding module 38 controls the conduction of the path between the super capacitor 35 and the power switching module 37, and the super capacitor 35 supplies power to the controller 31. When the voltage of the super capacitor 35 drops to be smaller than the preset voltage value, the voltage holding module 38 controls the disconnection of the path between the super capacitor 35 and the power switching module 37, and the super capacitor 35 continues to be charged to store electric energy for the next power supply.
In addition, the controller 31 includes an a/D interface, an IIC interface, an SPI interface, a GPIO, an SWD interface, and the like, and the circuit board is further provided with a storage module, a clock module, and a radio frequency module, which are all electrically connected to the controller 31. The storage module is used for storing wireless current transformer product ID, verification parameters, system parameters and the like; the clock module is used as a time basis for the controller 31 to send data at regular time; the radio frequency module is used for wirelessly receiving and transmitting signals, and performing one-way or two-way communication with the superior management unit to perform data interaction. The wireless current transformer is further provided with an LDO power supply 39, a power monitoring module 391 and a key module 392. The rectifier bridge 36 is electrically connected to the super capacitor 35 through the LDO power supply 39, the key module 392 is electrically connected to the controller 31, and the super capacitor 35 is electrically connected to the controller 31 through the power supply monitoring module 391. The rectifier bridge 36 rectifies the ac current into a current with a waveform required by the LDO power supply 39, and the LDO power supply 39 may be composed of a linear power supply chip, and converts the voltage output by the rectifier bridge 36 into a regulated voltage. The key module 392 mainly includes keys and an anti-shaking circuit, and is used for on-site and factory debugging, system wake-up and other functions. The power monitoring module 391 is configured to monitor the voltage of the super capacitor 35, output a wake-up and sleep signal, output the sleep signal to the controller 31 when the voltage of the super capacitor 35 is lower than a preset voltage value, trigger the controller 31 to enter a low power consumption sleep state, output the wake-up signal to the controller 31 when the voltage of the super capacitor 35 is higher than the preset voltage value, trigger the controller 31 to enter a wake-up and normal working state, and implement voltage monitoring on the super capacitor 35.
Optionally, the electromagnetic induction and energy output component 10 includes an upper magnetic core 11, a lower magnetic core 12 and a magnetic core skeleton 13, wherein current is transmitted between the upper magnetic core 11 and the lower magnetic core 12 through magnetic induction, and the lower magnetic core 12 and the magnetic core skeleton 13 are integrally disposed.
Specifically, referring to fig. 1, the wireless current transformer is a non-invasive lead-free open wireless current transformer, the electromagnetic induction and energy output part 10 mainly performs electromagnetic induction and energy output by an upper magnetic core 11 and a lower magnetic core 12, and the lower magnetic core 12 has a winding and outputs the induced alternating current through the winding.
Optionally, the electromagnetic induction and energy output component 10 further includes a housing upper cover 14, a housing lower cover 15, and a lower magnetic core cover plate 16, wherein the upper magnetic core 11 is disposed on the housing upper cover 14, the lower magnetic core 12 is disposed on the housing lower cover 15, and both the housing upper cover 14 and the lower magnetic core cover plate 16 are mechanically connected to the housing lower cover 15.
Specifically, as shown in fig. 1, the upper core 11 is embedded in the upper housing cover 14, the lower core 12 and the core frame 13 are embedded in the lower housing cover 15, and the core frame 13 is used for fixing and supporting the lower core 12 embedded in the lower housing cover 15. The connection mode of the upper housing cover 14 and the lower core cover 16 with the lower housing cover 15 can be set according to actual requirements, and is not limited herein.
Optionally, the wireless current transformer further comprises a spring 40, and the housing upper cover 14 is connected with the upper magnetic core 11 through the spring 40.
Specifically, as shown in fig. 1, the spring 40 may provide an elastic force between the upper core 11 and the upper housing cover 14, so that the upper core 11 and the lower core 12 can better perform electromagnetic induction when the upper housing cover 14 and the lower housing cover 15 are closed.
Optionally, the wireless current transformer further comprises a battery compartment 50 and a battery cover 60, the battery cover 60 being mechanically connected to the battery compartment 50, the battery 20 being arranged within the battery compartment 50.
Specifically, referring to fig. 1, the battery 20 is disposed in a battery case 50, the battery case 50 protects the battery 20 from the external environment, and a battery cover 60 opens the battery 20 in the battery case 50 to allow the battery 20 to be removed and replaced. In addition, the wireless current transformer is applied to a line for transmitting a large current, and the electric energy output by the electromagnetic induction and energy output part 10 can meet the electric energy required by the normal operation of the controller 31, in this case, the battery 20 is not needed, and resources can be saved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A wireless current transformer, comprising: electromagnetic induction and energy output components, batteries and circuit boards;
the circuit board is provided with a controller and a voltage-current conversion circuit, the controller is electrically connected with the electromagnetic induction and energy output component and the battery, and the voltage-current conversion circuit is electrically connected with the electromagnetic induction and energy output component and the controller;
the voltage and current conversion circuit is used for converting alternating current output by the electromagnetic induction and energy output component into alternating voltage, the controller is used for determining a corresponding current value of the alternating current according to the alternating voltage and outputting the current value, and the controller is powered by the battery or electric energy output by the electromagnetic induction and energy output component.
2. The wireless current transformer according to claim 1, wherein a resonant circuit, a switch and a super capacitor are further disposed on the circuit board, the electromagnetic induction and energy output component, the resonant circuit and the switch are electrically connected in sequence, the switch is electrically connected to the controller through the super capacitor, and the switch is further electrically connected to the controller through the voltage-current conversion circuit.
3. The wireless current transformer according to claim 2, wherein the switch comprises a first terminal, a second terminal and a control terminal, the first terminal of the switch is electrically connected to the super capacitor, the second terminal of the switch is electrically connected to the voltage-to-current conversion circuit, and the control terminal of the switch is electrically connected to the controller.
4. The wireless current transformer according to claim 2, wherein a rectifier bridge is further disposed on the circuit board, the switch is electrically connected to a super capacitor through the rectifier bridge, and the rectifier bridge is configured to rectify the alternating current and provide power for the super capacitor.
5. The wireless current transformer according to claim 2, wherein a power switching module is further disposed on the circuit board, the battery and the super capacitor are both electrically connected to the controller through the power switching module, and the power switching module is configured to switch the battery or the super capacitor to supply power to the controller.
6. The wireless current transformer according to claim 5, wherein a voltage holding module is further arranged on the circuit board, the super capacitor is electrically connected with the power supply switching module through the voltage holding module, and the voltage holding module controls the on-off state of a path between the super capacitor and the power supply switching module according to the voltage of the super capacitor.
7. The wireless current transformer of claim 1, wherein the electromagnetic induction and energy output component comprises an upper magnetic core, a lower magnetic core, and a magnetic core backbone, wherein current is transmitted between the upper magnetic core and the lower magnetic core by magnetic induction, and wherein the lower magnetic core and the magnetic core backbone are integrally formed.
8. The wireless current transformer of claim 7, wherein the electromagnetic induction and energy output component further comprises an upper housing cover, a lower housing cover, and a lower core cover, wherein the upper core is disposed on the upper housing cover, the lower core is disposed on the lower housing cover, and the upper housing cover and the lower core cover are mechanically coupled to the lower housing cover.
9. The wireless current transformer of claim 8, further comprising a spring, wherein the housing upper cover is connected to the upper magnetic core through the spring.
10. The wireless current transformer of claim 1, further comprising a battery compartment and a battery cover mechanically coupled to the battery compartment, the battery disposed within the battery compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220472263.2U CN217034076U (en) | 2022-03-04 | 2022-03-04 | Wireless current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220472263.2U CN217034076U (en) | 2022-03-04 | 2022-03-04 | Wireless current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217034076U true CN217034076U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220472263.2U Active CN217034076U (en) | 2022-03-04 | 2022-03-04 | Wireless current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217034076U (en) |
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2022
- 2022-03-04 CN CN202220472263.2U patent/CN217034076U/en active Active
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Effective date of registration: 20230609 Address after: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee after: TRINA SOLAR Co.,Ltd. Address before: 310000 room 2206, building 1, No. 650, Bin'an Road, Changhe street, Binjiang District, Hangzhou, Zhejiang Province Patentee before: Tianheyun Energy Internet Technology (Hangzhou) Co.,Ltd. |