CN107064591A - New digital mutual inductance isolating device - Google Patents
New digital mutual inductance isolating device Download PDFInfo
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- CN107064591A CN107064591A CN201710171391.7A CN201710171391A CN107064591A CN 107064591 A CN107064591 A CN 107064591A CN 201710171391 A CN201710171391 A CN 201710171391A CN 107064591 A CN107064591 A CN 107064591A
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- signal
- mutual inductance
- power supply
- digital mutual
- clock
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The present invention discloses a kind of new digital mutual inductance isolating device, is related to the fields such as power electronics, electric energy meter measurement technology.Numeral and clock signal are transmitted by mutual inductance impulsive quarantine device, power supply energy signal is transmitted.The device and realize that technology includes：The isolation of measured signal, the isolating of signal transducer collection change-over circuit and signal application circuit, the A/D of signal is changed and signal acquisition circuit is independently-powered.Measured signal can be the signals such as the voltage x current of light current or forceful electric power.The present invention utilizes digital transformer transmission data signal, measured signal is locally completed into analog signal to data signal conversion by sensor and ADC change-over circuits, transmitted by digital transformer to distal end or application end, solve the signals such as forceful electric power voltage, electric current or the severe signal acquisition of working environment and isolating problem, gathering change-over circuit simultaneously need not be from measured signal power taking or independent powerup issue, simplify system design, improve security reliability.
Description
Technical field
The present invention relates to the fields such as power electronics, electric energy meter measurement technology.Specifically related to a kind of new digital mutual inductance isolation
Device.
Background technology
In power transmission metering system, the size of current in circuit differs greatly, and is needed for ease of measurement, protection and control
The unified electric current of comparison is converted to, the voltage on circuit is typically higher in addition.Current transformer (Current
Transformer abbreviation CT) and voltage transformer (Potential transformer abbreviation PT) just play current-voltage conversion
With electrical isolation effect.Transformer works according to electromagnetic induction principle, and first winding connects the winding of tested electric current, and secondary winding connects
Measuring instrumentss.Exciting current in electromagnetic induction is the main contributor of error, add transformer be subjected to it is huge caused by short circuit
The fuel factor and electrodynamic action of high current, add signal conversion error, and CT or PT nonlinear characteristic, can also lead
The increase of error is caused, in addition error and primary circuit electric current and secondary load, the factor such as frequency of Current Voltage has relation.
At present, in practice, the collection of signal is not isolated with the process circuit of signal for common signal acquisition and application, or
Person is isolated using traditional technological means such as optocoupler or transformers.Traditional transformer can make first and second side mutually every
From so as to improve the security used, and strengthening the interference performance of application circuit.But traditional transformer, work as measured signal
When there is DC component, its measuring accuracy can be not only had a strong impact on, transformer heating is also resulted in.And the non-thread of isolating device
Property, also result in measured signal be transferred to ADC collection when, increase measurement result error.If measured signal passes through resistance net
Network partial pressure, it is to avoid the error caused by voltage, load, frequency and temperature change can be ignored, but forceful electric power can not be isolated.
The content of the invention
It is an object of the invention to provide a kind of new digital mutual inductance isolating device.
New digital mutual inductance isolating device, it realizes that content includes：Digital mutual inductance is from end interface (1), digital mutual inductance main side
Interface (10), pulse Mutual Inductance Coupling coil (9), PLL and clock recovery circuitry (2), ADC converters (3), with reference to correction voltage
(4), power supply and reset (5), measured signal (7), signal gain conditioning (6), power supply power supply signal (11), clock produce signal
(12), data receiver (13), order and data send (14).
Measured signal (7) is nursed one's health (6) by signal gain, it would be desirable to which the forceful electric power signal or light current of measurement need the letter isolated
Number signal shaping conditioning is carried out, be sent to ADC converters (3), feeding signal nurse one's health by filter shape etc., then is input to ADC turns
Parallel operation (3) is changed.
Digital mutual inductance can receive the power supply energy signal of digital mutual inductance main side interface (10) transmission from end interface (1), when
Clock signal and control command signal.And handled the different circuits of these signals progress parsing feeding.
PLL carries out clock recovery from the clock signal of end interface (1) by digital mutual inductance with clock recovery circuitry (2) and carried
Take.And clock multiplier is carried out by PLL, it is used as work clock to signal transducer collection change-over circuit.
Power supply is shaped as stably with resetting (5) by digital mutual inductance from the power supply energy signal progress extraction of end interface (1)
Specification power supply, to signal transducer collection change-over circuit be used as operating voltage.
Measured signal (7) is nursed one's health A/D turns of the analog signal progress that (6) are exported by ADC converters (3) by signal gain
Change, signal is switched into digital sampled signal.
With reference to correction voltage (4) high stable and the reference voltage of degree of precision are provided for ADC converters (3) work.
Digital mutual inductance main side interface (10) is provided by pulse Mutual Inductance Coupling coil (9) to digital mutual inductance from end interface (1)
Power supply energy signal, clock signal and control command signal.
Power supply power supply signal (11) provides power supply energy signal, and clock produces signal (12) and provides clock signal.Order with
Data send (14) and provide the measured signal gathered data for sending data transfer and data receiver (13) to receive.
Compared with prior art, the present invention has advantages below：With application in practice, signal is adopted for common signal acquisition
Collection is not isolated with the process circuit of signal, or is isolated using traditional technological means such as optocoupler or transformers.Tradition
Transformer first and second side can be made mutually isolated, but traditional transformer, when measured signal has DC component, no
Its measuring accuracy can be only had a strong impact on, transformer heating is also resulted in.And isolating device is non-linear, also results in measured signal
When being transferred to ADC collections, increase the error of measurement result.If measured signal passes through resistor network partial pressure, it is to avoid voltage, negative
Error caused by load, frequency and temperature change can be ignored, but can not isolate forceful electric power.The present invention uses data signal
The novel pulse isolation transformer of sensor chip, realizes isolating for signal acquisition circuit and metrology applications circuit, and analog quantity turns
Turn to digital quantity transmission etc..Using embedded digital signal processing integrated circuit, impulsive quarantine transformer of arranging in pairs or groups can preferably be located
Manage the isolating problem between signal acquisition and metrology applications.The method has the advantage of above-mentioned sample mode concurrently with technology, passes simultaneously
Sensor Acquisition Circuit directly isolates power taking no longer from power taking in measured signal system in ic for energy metering, realizes in collection
During physical quantity, sensor circuit influence measured signal is substantially reduced, the degree of accuracy gathered to physical signalling is improved.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, of the invention is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 is the overall structure diagram of new digital mutual inductance isolating device of the present invention；
Fig. 2 is the schematic diagram of an embodiment of new digital mutual inductance isolating device of the present invention.
Same or analogous reference represents same or analogous part in accompanying drawing.
Embodiment
In order that the technical scheme of the invention realized, creation characteristic are easier to understand, it is further with reference to being specifically illustrating
Illustrate the present invention.
With reference to Fig. 1, the new digital mutual inductance isolating device, the device includes：Digital mutual inductance from end interface (1), numeral
Mutual inductance main side interface (10), pulse Mutual Inductance Coupling coil (9), PLL and clock recovery circuitry (2) and ADC converters (3)；
Wherein, in device work parameter and operation includes：With reference to correction voltage (4), power supply and reset (5), it is tested
Signal (7), signal gain conditioning (6), power supply power supply signal (11), clock produce signal (12), data receiver (13) and order
(14) are sent with data.
In above-mentioned design by pulse Mutual Inductance Coupling coil (9) by digital mutual inductance from end interface (1) and digital mutual inductance main side
Interface (10) is connected.Wherein digital mutual inductance is from end interface (1), PLL and clock recovery circuitry (2), ADC converters (3), ginseng
It is that measured signal gathers change-over circuit to examine correction voltage (4), power supply and reset (5) and signal gain conditioning (6).
Digital mutual inductance main side interface (10), power supply power supply signal (11), clock produce signal (12), data receiver (13) and
It is the circuit parts such as signal application metering that order sends (14) with data.Quilt is obtained by the signal acquisition change-over circuit of front end
Survey the collection digital value of signal.
Measured signal (7) nurses one's health the letter that the forceful electric power signal or light current that need to measure are needed to isolate by (6) by signal gain
Number signal shaping conditioning is carried out, be sent to ADC converters (3), feeding signal needs that by the conditioning such as filter shape ADC could be sent into
Processing.
Wherein digital mutual inductance can receive the power supply energy letter of digital mutual inductance main side interface (10) transmission from end interface (1)
Number, clock signal and control command signal.And handled the different circuits of these signals progress parsing feeding.
PLL carries out clock recovery from the clock signal of end interface (1) by digital mutual inductance with clock recovery circuitry (2) and carried
Take.And clock multiplier is carried out by PLL, it is used as work clock to signal transducer collection change-over circuit.
Power supply is shaped as stably with resetting (5) by digital mutual inductance from the power supply energy signal progress extraction of end interface (1)
Specification power supply, to signal transducer collection change-over circuit be used as operating voltage.
Measured signal (7) is nursed one's health A/D turns of the analog signal progress that (6) are exported by ADC converters (3) by signal gain
Change, signal is switched into digital sampled signal.With reference to correction voltage (4) high stable is provided for ADC converters (3) work and more high-precision
The reference voltage of degree.
Digital mutual inductance main side interface (10) is provided by pulse Mutual Inductance Coupling coil (9) to digital mutual inductance from end interface (1)
Power supply energy signal, clock signal and control command signal.Power supply power supply signal (11) provides power supply energy signal, and clock is produced
Signal (12) provides clock signal.It is to receive that order sends (14) to provide transmission data transfer and data receiver (13) with data
Measured signal gathered data.
The present invention is locally being changed measured signal using digital transformer transmission data signal by sensor and ADC
Circuit completes analog signal and changed to data signal, is transmitted by digital transformer to distal end or application end, solves forceful electric power electricity
The signals such as pressure, electric current or the severe signal acquisition of working environment and isolating problem, need not be from tested while gathering change-over circuit
Signal power taking or independent powerup issue, simplify system design, improve security reliability.
Fig. 2 is the schematic diagram of the first embodiment of the present invention.HG002 (S102) and HG001 (S103) constitutes a pair of data
Gather and use.HG001 (S103) is that data use metering end.HG002 (S102) is data acquisition end, and voltage and current is entered
Row collection.By impulsive quarantine transformer (S101), data are issued into HG001 (S103) ends.HG001 (S103) passes through meter
Part, the voltage x current data of reception are calculated and obtain a series of electrical energy parameter index.
HG001 (S103) for HG002 (S102) while provide power supply energy signal, and HG002 (S102) can obtain isolation
Power supply.So HG002 (S102) sample circuit extra need not obtain power supply from circuit-under-test, reduce to measured signal
Influence.
More than display and it is described be only to the present invention general principle and principal character and embodiment description, the industry
Technical staff should be recognized that.The present invention is not limited to the above embodiments.The premise of spirit and scope of the invention is not being departed from
Under, various modifications and improvement that the engineering personnel of this area make to technical scheme both fall within the present invention's
Within the protection domain that claims are determined.
Claims (9)
1. new digital mutual inductance isolating device, it is characterised in that the device includes：Digital mutual inductance is from end interface (1), digital mutual inductance
Main side interface (10), pulse Mutual Inductance Coupling coil (9), PLL and clock recovery circuitry (2) and ADC converters (3)；
Wherein, in device work parameter and operation includes：
With reference to correction voltage (4), power supply and reset (5), measured signal (7), signal gain conditioning (6), power supply power supply signal
(11), clock produces signal (12), data receiver (13) and order and sends (14) with data.
2. new digital mutual inductance isolating device according to claim 1, it is characterised in that measured signal (7) passes through signal
(6) are nursed one's health in gain needs the signal isolated to carry out signal shaping conditioning the forceful electric power signal or light current that need to measure, is sent to ADC and turns
Parallel operation (3), sends into signal and is nursed one's health by filter shape etc., then be input to ADC converters (3) and changed.
3. new digital mutual inductance isolating device according to claim 1, it is characterised in that digital mutual inductance is from end interface (1)
The power supply energy signal of digital mutual inductance main side interface (10) transmission, clock signal and control command signal can be received.And by this
A little signals carry out the different circuit of parsing feeding and handled.
4. the new digital mutual inductance isolating device according to claim 1 or 3, it is characterised in that PLL and clock recovery circuitry
(2) clock recovery and extraction are carried out from the clock signal of end interface (1) by digital mutual inductance.And clock multiplier is carried out by PLL,
Work clock is used as to signal transducer collection change-over circuit.
5. the new digital mutual inductance isolating device according to claim 1 or 3, it is characterised in that power supply passes through with resetting (5)
Digital mutual inductance, which from the power supply energy signal of end interface (1) extract, is shaped as stable specification power supply, is adopted to signal transducer
Collection change-over circuit is used as operating voltage.
6. new digital mutual inductance isolating device according to claim 1, it is characterised in that ADC converters (3) are by tested letter
Number (7) nurse one's health the analog signal that (6) export by signal gain and carry out A/D conversions, and signal is switched into digital sampled signal.
7. the new digital mutual inductance isolating device according to claim 1 or 6, it is characterised in that be with reference to correction voltage (4)
ADC converters (3) work provides high stable and the reference voltage of degree of precision.
8. new digital mutual inductance isolating device according to claim 1, it is characterised in that digital mutual inductance main side interface (10)
By pulse Mutual Inductance Coupling coil (9), power supply energy signal, clock signal and control are provided to digital mutual inductance from end interface (1)
Command signal.
9. new digital mutual inductance isolating device according to claim 1, it is characterised in that power supply power supply signal (11) is provided
Power supply energy signal, clock produces signal (12) and provides clock signal.Order sends (14) with data and data receiver (13) is carried
For data transfer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710171391.7A CN107064591A (en) | 2017-03-21 | 2017-03-21 | New digital mutual inductance isolating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710171391.7A CN107064591A (en) | 2017-03-21 | 2017-03-21 | New digital mutual inductance isolating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107064591A true CN107064591A (en) | 2017-08-18 |
Family
ID=59620780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710171391.7A Withdrawn CN107064591A (en) | 2017-03-21 | 2017-03-21 | New digital mutual inductance isolating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107064591A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108021172A (en) * | 2017-11-28 | 2018-05-11 | 深圳市航天新源科技有限公司 | A kind of high bandwidth input isolation sampling and precision calibration circuit and method |
| CN110068713A (en) * | 2019-04-08 | 2019-07-30 | 清华大学 | Wireless charging system for electric automobile fundamental current and voltage detecting circuit |
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| CN201266232Y (en) * | 2008-09-18 | 2009-07-01 | 西安天城电力仪器设备有限责任公司 | AC test device for on-load tap-changer operating characteristic of transformer |
| US20100023283A1 (en) * | 2008-07-23 | 2010-01-28 | Kourosh Boutorabi | Isolated current sensor |
| CN101997629A (en) * | 2009-08-17 | 2011-03-30 | 瑞萨电子株式会社 | Transceiver and operating method thereof |
| CN102944737A (en) * | 2012-11-22 | 2013-02-27 | 中国科学院电工研究所 | Intelligent sensor for measuring high current |
| CN103235208A (en) * | 2013-03-26 | 2013-08-07 | 哈尔滨工业大学 | Power parameter monitoring device based on ADE (automated data entry) 7953 |
-
2017
- 2017-03-21 CN CN201710171391.7A patent/CN107064591A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100023283A1 (en) * | 2008-07-23 | 2010-01-28 | Kourosh Boutorabi | Isolated current sensor |
| CN201266232Y (en) * | 2008-09-18 | 2009-07-01 | 西安天城电力仪器设备有限责任公司 | AC test device for on-load tap-changer operating characteristic of transformer |
| CN101997629A (en) * | 2009-08-17 | 2011-03-30 | 瑞萨电子株式会社 | Transceiver and operating method thereof |
| CN102944737A (en) * | 2012-11-22 | 2013-02-27 | 中国科学院电工研究所 | Intelligent sensor for measuring high current |
| CN103235208A (en) * | 2013-03-26 | 2013-08-07 | 哈尔滨工业大学 | Power parameter monitoring device based on ADE (automated data entry) 7953 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108021172A (en) * | 2017-11-28 | 2018-05-11 | 深圳市航天新源科技有限公司 | A kind of high bandwidth input isolation sampling and precision calibration circuit and method |
| CN110068713A (en) * | 2019-04-08 | 2019-07-30 | 清华大学 | Wireless charging system for electric automobile fundamental current and voltage detecting circuit |
| CN110068713B (en) * | 2019-04-08 | 2020-08-28 | 清华大学 | Fundamental current and voltage detection circuit of wireless charging system of electric automobile |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170818 |
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| WW01 | Invention patent application withdrawn after publication |