CN203085344U - Integrated digital current transformer - Google Patents

Integrated digital current transformer Download PDF

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Publication number
CN203085344U
CN203085344U CN 201220334953 CN201220334953U CN203085344U CN 203085344 U CN203085344 U CN 203085344U CN 201220334953 CN201220334953 CN 201220334953 CN 201220334953 U CN201220334953 U CN 201220334953U CN 203085344 U CN203085344 U CN 203085344U
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CN
China
Prior art keywords
current transformer
iron
coil
cable
integrated digital
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220334953
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Chinese (zh)
Inventor
申伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou I-Sky Electronic Science & Technology Co Ltd
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Guangzhou I-Sky Electronic Science & Technology Co Ltd
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Publication date
Application filed by Guangzhou I-Sky Electronic Science & Technology Co Ltd filed Critical Guangzhou I-Sky Electronic Science & Technology Co Ltd
Priority to CN 201220334953 priority Critical patent/CN203085344U/en
Application granted granted Critical
Publication of CN203085344U publication Critical patent/CN203085344U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an integrated digital current transformer which comprises the following components: two split iron core coils, an indicating lamp, a communication interface and an outer housing. The current transformer is internally provided with a circuit board. The two split iron core coils are respectively designed to the split type and can be equipped on a cable without cable breakage, wherein one split iron core coil is an induction powering switch. Electric energy is generated through inducing the magnetic field which passes through the surrounding part of the cable of the iron core coil, and the electric energy is supplied to the circuit board for operation, wherein the other split iron core coil is a detection coil. The value of the current which passes through the cable of the iron core coil is detected and converted to a corresponding analog signal through a sampling module. After the analog signal is converted to a digital signal through an analog-to-digital conversion module of the circuit board, the digital signal is transmitted out through a CAN controller. According to the integrated digital current transformer, electricity is supplied through the induction powering switch, no external power supply is required. Furthermore the digital signal can be directly output without an additional acquisition module. The measurement precision is improved and simultaneously long-distance transmission is facilitated.

Description

The integrated digital current transformer
Technical field
The utility model relates to a kind of current transformer, relates in particular to a kind of integrated digital current transformer.
Background technology
Instrument transformer is the equipment of scaling transformation voltage or electric current, and its function is that high voltage or big electric current scaling transformation are become standard low-voltage or the little electric current of standard, so that realize measuring instrument, protection equipment, and standardization, the miniaturization of automatic control equipment.In addition, instrument transformer can also be used to separating high-voltage system, to guarantee the safety of the person and equipment.Current transformer is the parts that carry out current conversion according to electromagnetic induction principle, is widely used in the electric power system, plays unsteady flow and electrical isolation.
At present the current transformer that uses is generally Wiring type or punching, and its iron core and shell are the closed type setting, and iron core is the annular that seals or square.When mounted, cable must be taken apart, just must after outage, just can install or operation such as dismounting, the operation more complicated, even can influence the normal operation of power supply unit, influenced people's normal electricity consumption.
Existing general current transformer, it can only accomplish detection streamer running current value, and the function of direct output AC analog signals.The data transmission distance of this ac analog signal is very near can't carry out long-distance transmissions, just can carry out long-distance transmissions after must analog signals being converted to digital signal by the acquisition module that other establishes, and equipment cost is comparatively expensive.In addition, because analog signals can produce decay in various degree because of the length difference of lead in transmission course, thereby influence certainty of measurement.Simultaneously, analog signals is interfered easily, therefore also can influence the authenticity of measurement.
Summary of the invention
The purpose of this utility model is, a kind of integrated digital current transformer is provided, and it is powered by induced current, need not externally fed, and directly exports digital signal and need not acquisition module, is beneficial to long Distance Transmission when improving certainty of measurement. [0006]The utility model discloses the integrated digital current transformer, it comprises two open-close type iron-core coils, indicator light, communication interface, shell body, and this current transformer inside is provided with circuit board.Two open-close type iron-core coils all adopt the open-close type design need not disconnect cable can be installed on the cable, one of them open-close type iron-core coil is induction power taking coil, pass iron-core coil cable magnetic field generation electric energy supply circuit plate on every side by induction and carry out work, wherein another open-close type iron-core coil is a magnetic test coil, thereby detection is passed the current value of iron-core coil cable and is converted to corresponding simulating signal with it by sampling module, and the analog-to-digital conversion module of this analog passband signal oversampling circuit plate is gone out with digital data transmission by the CAN controller after being converted to digital signal.
The utility model adopts the open-close type design, and two semi-round ring shape housings of plastic casing form a closed circle ring type, and make two iron-core coil closures by the holding screw installation that cooperatively interacts.
The built-in circuit board of the utility model is provided with rectification circuit, DC/DC change-over circuit, induction power taking coil will respond to the electric energy that produces by rectification circuit and DC/DC change-over circuit output burning voltage after, pass through power module and provide the operation power supply for the entire circuit plate.
The utility model is adopted communication interface for adopting the CAN bus communication interface of CAN agreement.
Two iron-core coils that the utility model is adopted include two open-close type semicircular ring iron cores that are oppositely arranged, and these two iron cores all are filled with ambroin.
In the utility model, include two iron-core coils in the described integrated digital current transformer, these two iron-core coils all adopt the setting of open-close type iron core, wherein an iron core is induction power taking coil, another iron core is a magnetic test coil, this induction power taking coil and rectification circuit electrically connect, and magnetic test coil and sampling module electrically connect.
Integrated digital current transformer of the present utility model, it selects the super low-power consumption element for use, realized powering by induced current, need not externally fed, directly the output digital signal need not acquisition controller, guarantee primary signal not decay and interference, when improving certainty of measurement, greatly reduce engineering difficulty and expense.
Description of drawings
Fig. 1 is the external structure schematic diagram of a kind of specific embodiment of the utility model integrated digital current transformer;
Fig. 2 is the semi-section structural representation of a kind of specific embodiment of integrated digital current transformer among Fig. 1;
Fig. 3 is the cross-sectional view of plastic casing in the utility model;
Fig. 4 is the module diagram of a kind of specific embodiment of the utility model integrated digital current transformer.
Embodiment
Shown in Fig. 1-4, the utility model provides a kind of integrated digital current transformer, it comprises: shell body 3, be located at circuit board 6 in shell body 3 bottoms, be located at the indicator light 1 of shell body 3 bottoms,, be located at two iron-core coils 4,7 in the shell body 3, described shell body 3 bottoms are provided with external communication interface 2; Circuit board 6 is provided with rectification circuit 61, DC/DC change-over circuit 62, power module 63, sampling module 64, D/A converter module 65, operational analysis module 66, CAN controller 67, shell body 3 is the semi-round ring shape housing that two cooperations are installed, two iron cores 4,7 all adopt the setting of open-close type iron core, wherein an iron core 4 is induction power taking coil, another iron core 7 is a magnetic test coil, this induction power taking coil 4 electrically connects with rectification circuit 61, magnetic test coil 7 electrically connects with sampling module 64, and described external communication interface 2 can be connected with data acquisition unit by the CAN bus.
Wherein, described shell body 3 is provided with holding screw 5, and two semi-round ring shape housings of shell body 3 form a close ring by the installation that cooperatively interacts of this holding screw 5.During use, not needing to cut off cable can be installed on this integrated digital current transformer above the cable by two semi-round ring shape housings, makes current transformer form the coil of a closure, operates comparatively simple, greatly reduce difficulty of construction, can not influence the normal operation of power supply unit.In the utility model specific embodiment, described shell body also is provided with indicator light 1 on 3 bottoms, and this indicator light 1 can show the operating state of integrated digital current transformer.
Induction power taking coil 4 of the present utility model is transformed to DC power supply with the electric energy sensed after by rectification circuit 61 rectifications, this DC power supply is transferred to power module 63 reduce to the relevant work voltage of analog-to-digital conversion module 65 grades by 62 step-downs of DC/DC change-over circuit after, provides normal working power by D/A converter module 65, operational analysis module 66, CAN controller 67 on 63 pairs of circuit boards 6 of power module.
Magnetic test coil 7 of the present utility model is exported corresponding analog data with running current by sampling module 64 sampling backs after responding to the running current that detects cable, be converted to digital signal by analog-to-digital conversion module 65, this digital signal is transmitted by the communication mode of CAN controller 67 with the CAN bus after carrying out the data analysis verification through operational analysis module 66.The communication mode of this CAN bus has the higher signal transmission rate, and the signal transmission is more safe and reliable.
As a kind of selectivity embodiment of the present utility model, described external communication interface 2 is for adopting the CAN bus communication interface of CAN agreement, can be by this communication interface with the digital signal remote transmission to the host computer monitoring equipment, can realize reaching 1 kilometer signal transmission and, guarantee the authenticity of measuring without any loss.
In addition, two iron cores 4,7 of the present utility model include two open-close type semicircular ring iron cores that are oppositely arranged, and are filled with ambroin between these two iron cores 4,7., can also be between two iron cores 4,7 insulating material such as potting resin glue, silica gel or rubber, guarantee the electric induction performance of this integrated digital current transformer.
In sum, incorporate digital current instrument transformer of the present utility model, it selects the super low-power consumption element for use, realized powering by induced current, need not externally fed, directly export digital signal and need not acquisition module, guarantee primary signal not decay and interference, when improving certainty of measurement, greatly reduce engineering difficulty and expense.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection range of the utility model accompanying Claim.

Claims (5)

1. integrated digital current transformer, it comprises two open-close type iron-core coils, indicator light, communication interface, shell body, this current transformer inside is provided with circuit board, two open-close type iron-core coils all adopt the open-close type design need not disconnect cable can be installed on the cable, one of them open-close type iron-core coil is induction power taking coil, pass iron-core coil cable magnetic field generation electric energy supply circuit plate on every side by induction and carry out work, wherein another open-close type iron-core coil is a magnetic test coil, thereby detection is passed the current value of iron-core coil cable and is converted to corresponding simulating signal with it by sampling module, and the analog-to-digital conversion module of this analog passband signal oversampling circuit plate is gone out with digital data transmission by the CAN controller after being converted to digital signal; The integrated digital current transformer need not externally fed by induction power taking coil power supply, and need not other acquisition module and can directly export digital signal, is beneficial to long Distance Transmission when improving certainty of measurement.
2. integrated digital current transformer as claimed in claim 1 is characterized in that adopting open-close type design, and two semi-round ring shape housings of plastic casing form a closed circle ring type, and make two iron-core coil closures by the holding screw installation that cooperatively interacts.
3. integrated digital current transformer as claimed in claim 1, it is characterized in that circuit board is provided with rectification circuit, DC/DC change-over circuit, induction power taking coil will respond to the electric energy that produces by rectification circuit and DC/DC change-over circuit output burning voltage after, pass through power module and provide the operation power supply for the entire circuit plate.
4. integrated digital current transformer as claimed in claim 1 is characterized in that communication interface is to adopt the CAN bus communication interface of CAN agreement.
5. integrated digital current transformer as claimed in claim 1 is characterized in that two iron-core coils include two open-close type semicircular ring iron cores that are oppositely arranged, and these two iron cores all are filled with ambroin.
CN 201220334953 2012-07-12 2012-07-12 Integrated digital current transformer Expired - Fee Related CN203085344U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220334953 CN203085344U (en) 2012-07-12 2012-07-12 Integrated digital current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220334953 CN203085344U (en) 2012-07-12 2012-07-12 Integrated digital current transformer

Publications (1)

Publication Number Publication Date
CN203085344U true CN203085344U (en) 2013-07-24

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103605045A (en) * 2013-11-01 2014-02-26 航天科工深圳(集团)有限公司 Power transmission line fault detection device
CN103675431A (en) * 2013-12-03 2014-03-26 浙江华采科技有限公司 Current collecting device on power transmission line
CN103675407A (en) * 2013-12-03 2014-03-26 浙江华采科技有限公司 Strut-type current collection device for power transmission lines
CN104569532A (en) * 2015-01-29 2015-04-29 国家电网公司 Collecting-combining-integrated device of electronic transformer
CN106053913A (en) * 2016-05-03 2016-10-26 北京铁道工程机电技术研究所有限公司 Field bus type AC current transformer
CN106226576A (en) * 2016-05-03 2016-12-14 北京铁道工程机电技术研究所有限公司 A kind of field bus type AC voltage transformer
CN109686067A (en) * 2018-11-29 2019-04-26 江阴市星火电子科技有限公司 Multi-serial port parallel connection communicates mutual inductor
CN109741584A (en) * 2018-11-29 2019-05-10 江阴市星火电子科技有限公司 A kind of Multi-serial port parallel connection communication mutual inductor
CN111751656A (en) * 2020-06-05 2020-10-09 水木源华电气有限公司 Voltage and current measurement energy-taking device for power transmission and distribution line

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103605045A (en) * 2013-11-01 2014-02-26 航天科工深圳(集团)有限公司 Power transmission line fault detection device
CN103605045B (en) * 2013-11-01 2016-05-11 航天科工深圳(集团)有限公司 A kind of failure detection device for power transmission line
CN103675431A (en) * 2013-12-03 2014-03-26 浙江华采科技有限公司 Current collecting device on power transmission line
CN103675407A (en) * 2013-12-03 2014-03-26 浙江华采科技有限公司 Strut-type current collection device for power transmission lines
CN104569532A (en) * 2015-01-29 2015-04-29 国家电网公司 Collecting-combining-integrated device of electronic transformer
CN106053913A (en) * 2016-05-03 2016-10-26 北京铁道工程机电技术研究所有限公司 Field bus type AC current transformer
CN106226576A (en) * 2016-05-03 2016-12-14 北京铁道工程机电技术研究所有限公司 A kind of field bus type AC voltage transformer
CN109686067A (en) * 2018-11-29 2019-04-26 江阴市星火电子科技有限公司 Multi-serial port parallel connection communicates mutual inductor
CN109741584A (en) * 2018-11-29 2019-05-10 江阴市星火电子科技有限公司 A kind of Multi-serial port parallel connection communication mutual inductor
CN109741584B (en) * 2018-11-29 2020-04-28 江阴市星火电子科技有限公司 Multi-serial-port parallel communication transformer
CN111751656A (en) * 2020-06-05 2020-10-09 水木源华电气有限公司 Voltage and current measurement energy-taking device for power transmission and distribution line

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130724

Termination date: 20150712

EXPY Termination of patent right or utility model