CN208621675U - Self-powered multifunctional electric meter - Google Patents
Self-powered multifunctional electric meter Download PDFInfo
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- CN208621675U CN208621675U CN201821115507.1U CN201821115507U CN208621675U CN 208621675 U CN208621675 U CN 208621675U CN 201821115507 U CN201821115507 U CN 201821115507U CN 208621675 U CN208621675 U CN 208621675U
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- mutual inductor
- supply current
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Abstract
The utility model relates to a kind of self-powered multifunctional electric meters, including electric instrument ontology, power input is provided on electric instrument ontology, it further include supply current mutual inductor and energy storage device, the first side winding of supply current mutual inductor is used to connect alternating current circuit, the first secondary winding for electrical connection power input, the input terminal of second secondary winding power connection energy storage device, and the output end of energy storage device is for being electrically connected power input.The utility model passes through one supply current mutual inductor of setting and energy storage device, two secondary windings of supply current mutual inductor are respectively for electrical connection power input and energy storage device, electric energy is provided directly to multifunctional electric meter using supply current mutual inductor under normal circumstances, and when supply current mutual inductor cannot directly power, the energy storage device for being employed as backup power source provides work energy to multifunctional electric meter, it ensure that the continual and steady operation of multifunctional electric meter, it has the advantages of simple structure and easy realization.
Description
Technical field
The utility model relates to a kind of multifunctional electric meter more particularly to a kind of self-powered multifunctional electric meters.
Background technique
With the continuous development of power automation, multifunctional electric meter on power distribution cabinet using more more and more universal.It is existing
There is the structure connection diagram of multifunctional electric meter as shown in Figure 1, including electric instrument ontology, is set on the electric instrument ontology
It is equipped with the power input for connecting power supply, is also connected with acquisition unit and display unit, for line voltage distribution, electricity
Stream information is acquired and shows.
Acquisition and monitoring for electricity, it is more although multifunctional electric meter brings very big convenience to us
Still there are very big problems for function electric instrument.Such as: the external power supply of multifunctional electric meter is not easy to look for；Also exist
When electric equipment operation, route primary side current is fluctuated with the fluctuation of load, and power supply instability, especially line maintenance are negative
When carrying excision, multifunctional electric meter can not just obtain external power supply, just will affect background monitoring system current information at this time
Acquisition and monitoring.
Utility model content
The purpose of the utility model is to provide a kind of self-powered multifunctional electric meters, for solving multifunction power instrument
The problem of table power supply instability.
In order to solve the above technical problems, the utility model provides a kind of self-powered multifunctional electric meter, including electricity
Power meter body is provided with power input on the electric instrument ontology, further includes supply current mutual inductor and energy storage device,
The first side winding of the supply current mutual inductor for connecting alternating current circuit, the first of the supply current mutual inductor it is secondary around
Group connects the energy storage device for being electrically connected the power input, the second secondary winding power of the supply current mutual inductor
Input terminal, the output end of the energy storage device is for being electrically connected the power input.
The beneficial effects of the utility model are: by one supply current mutual inductor of setting and energy storage device, supply current
Two secondary windings of mutual inductor are respectively for the power input and energy storage device of electrical connection multifunctional electric meter, in positive reason
Under condition, work energy is provided directly to multifunctional electric meter using supply current mutual inductor, and works as supply current mutual inductor one
In the case where secondary side power-off, the energy storage device for being employed as backup power source provides work energy to multifunctional electric meter, guarantees
Multifunctional electric meter continual and steady operation, and have the advantages of simple structure and easy realization.
Further, in order to realize that energy storage is spare, the energy storage device includes AC/DC module and inversion filter module, institute
The input terminal for stating AC/DC module connects the second secondary winding of the supply current mutual inductor, the output end of the AC/DC module
Connect the input terminal of the inversion filter module, the output end of the inversion filter module for being electrically connected the power input,
The output end of the AC/DC module is connected with storage capacitor.
Further, in order to provide stand-by electric energy, the inversion filter module includes bridge type inverse module and LC filtering mould
Block.
Further, electric energy reversely charging in order to prevent, is also connected between the output end and storage capacitor of the AC/DC module
Counnter attack diode.
Detailed description of the invention
Fig. 1 is the structure connection diagram of existing multifunctional electric meter；
Fig. 2 is the structure connection diagram of the self-powered multifunctional electric meter of the utility model；
Fig. 3 is the circuit structure diagram of energy storage device；
Fig. 4 is the circuit diagram of inversion filter module.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and specifically
The present invention will be further described in detail for embodiment.
The utility model provides a kind of self-powered multifunctional electric meter, and structural schematic diagram is as shown in Fig. 2, include
Electric instrument ontology is provided with power input on electric instrument ontology, and for receiving working power, electric instrument ontology also connects
It is connected to acquisition unit and display unit, collected data are sent to electricity for acquiring route voltage and current by acquisition unit
Power meter body, and shown in display unit.
In order to realize power supply power supply, which exports power-supply service using secondary winding in current transformer,
It further include supply current mutual inductor and energy storage device.The secondary winding of the supply current mutual inductor includes the first secondary winding and the
Two secondary windings, that is, the measurement winding and protective winding of existing current transformer, the first secondary winding can for measurement around
Group and one of them in protective winding, and second secondary winding then corresponds to another winding.Wherein, supply current mutual inductance
The first side winding of device connects alternating current circuit, for taking electricity from alternating current circuit.First secondary winding of supply current mutual inductor supplies
It is electrically connected the power input of multifunctional electric meter, the second secondary winding power of supply current mutual inductor connects energy storage device
Input terminal, the output end of energy storage device is for being electrically connected power input.
Wherein, in the present embodiment, it is desirable that the load capacity of the first secondary side winding of supply current mutual inductor is not less than
5VA, to guarantee that supply current mutual inductor first winding load current of route in the 10% of specified CT no-load voltage ratio, is capable of providing
The enough starting electric energy of energy storage device.
Fig. 3 gives the circuit structure diagram of energy storage device (self-power supply device), which includes AC/DC module and inverse
Become filter module, the input terminal of the AC/DC module connects the second secondary winding of supply current mutual inductor, the AC/DC module
Output end connects the input terminal of inversion filter module, and the output end of inversion filter module is for being electrically connected the electricity of multifunctional electric meter
Source input terminal, the output end of the AC/DC module are connected with storage capacitor C1.In the present embodiment, storage capacitor C1 can be stored
220V voltage.In order to prevent in the case where providing backup power source, the electric energy in storage capacitor C1 is supplied back to AC/DC module
Electricity is also connected with counnter attack diode D1 between the output end and storage capacitor of AC/DC module.
As shown in figure 4, inversion filter module includes bridge type inverse module and LC filter module, the bridge type inverse module is by function
Rate switching tube K1, K2, K3 and K4 are constituted, and LC filter module is made of inductance L1 and capacitor C4.During the work time, storage capacitor
The 220V electric energy of C1 storage is closed at by the inversion of bridge type inverse module, first switch K1 and switch K3, before inductance L1
A negative voltage is had, lower end is positive voltage；When switch K2 and switch K4 are closed at, one is had before inductance L1
A positive voltage, lower end are negative voltage；It ceaselessly converts in this way, obtains a series of rectangular wave, mould is then filtered by LC
Block filters to obtain smooth sine wave, and the power input that storage capacitor C1 is multifunctional electric meter thus may be implemented and supply
Electricity.
In the case where the alternating current circuit normal power-up that the first side winding of supply current mutual inductor is connected, supply current
First secondary winding the operation is stable of mutual inductor, using the first secondary winding of supply current mutual inductor directly to multifunction power
The power input of instrument is powered.Meanwhile the alternating current of the second secondary winding of supply current mutual inductor is by energy storage device
AC/DC module rectification after, give storage capacitor C1 charging energy-storing.And connected when the first side winding of supply current mutual inductor
In the case where alternating current circuit power-off either the first secondary winding job insecurity of supply current mutual inductor, pass through control at this time
The conducting of inversion filter module, the electricity of multifunctional electric meter is given using the electric energy stored in storage capacitor C1 after inversion filters
Source supplying power for input end.
The self-powered multifunctional electric meter of the utility model has the advantages of simple structure and easy realization, and can not only be multi-functional electricity
Power instrument provides power supply, while being capable of providing the starting electric energy of energy storage device, and then guarantees that multifunctional electric meter is continual and steady
Operation, efficiently solve existing multifunctional electric meter external power supply be not easy to look for either outer power voltage it is unstable
The problems such as.
Claims (4)
1. a kind of self-powered multifunctional electric meter, including electric instrument ontology, electricity is provided on the electric instrument ontology
Source input terminal, which is characterized in that further include supply current mutual inductor and energy storage device, the primary side of the supply current mutual inductor
Winding for connecting alternating current circuit, the first secondary winding of the supply current mutual inductor for being electrically connected the power input,
The second secondary winding power of the supply current mutual inductor connects the input terminal of the energy storage device, the energy storage device it is defeated
Outlet is for being electrically connected the power input.
2. self-powered multifunctional electric meter according to claim 1, which is characterized in that the energy storage device includes
AC/DC module and inversion filter module, the input terminal of the AC/DC module connect the second secondary of the supply current mutual inductor
Winding, the output end of the AC/DC module connect the input terminal of the inversion filter module, the output of the inversion filter module
End is connected with storage capacitor for being electrically connected the power input, the output end of the AC/DC module.
3. self-powered multifunctional electric meter according to claim 2, which is characterized in that the inversion filter module packet
Include bridge type inverse module and LC filter module.
4. self-powered multifunctional electric meter according to claim 2 or 3, which is characterized in that the AC/DC module
Counnter attack diode is also connected between output end and storage capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821115507.1U CN208621675U (en) | 2018-07-12 | 2018-07-12 | Self-powered multifunctional electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821115507.1U CN208621675U (en) | 2018-07-12 | 2018-07-12 | Self-powered multifunctional electric meter |
Publications (1)
| Publication Number | Publication Date |
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| CN208621675U true CN208621675U (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821115507.1U Active CN208621675U (en) | 2018-07-12 | 2018-07-12 | Self-powered multifunctional electric meter |
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| CN (1) | CN208621675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663561A (en) * | 2018-07-12 | 2018-10-16 | 河南森源电气股份有限公司 | A kind of self-powered multifunctional electric meter |
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2018
- 2018-07-12 CN CN201821115507.1U patent/CN208621675U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663561A (en) * | 2018-07-12 | 2018-10-16 | 河南森源电气股份有限公司 | A kind of self-powered multifunctional electric meter |
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