CN209513935U - A kind of three-phase AC/DC universal electricity measuring instrument - Google Patents
A kind of three-phase AC/DC universal electricity measuring instrument Download PDFInfo
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- CN209513935U CN209513935U CN201822082980.0U CN201822082980U CN209513935U CN 209513935 U CN209513935 U CN 209513935U CN 201822082980 U CN201822082980 U CN 201822082980U CN 209513935 U CN209513935 U CN 209513935U
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Abstract
The utility model discloses a kind of three-phase AC/DC universal electricity measuring instruments, comprising: voltage and current acquisition module, MCU processor, isolated power supply, communication interface, network interface, power processor；The voltage and current acquisition module includes A/D chip, isolated location, the first amplifier processing module, the second amplifier processing module, current sensor, resistance；The resistance is connected to the first amplifier processing module；The first amplifier processing module is electrically connected to isolated location；The isolated location is electrically connected to A/D chip；The current sensor is electrically connected to the second amplifier processing module；The second amplifier processing module is electrically connected to A/D chip；The A/D chip is electrically connected to MCU processor；The utility model realizes the general of three-phase alternating current-direct current signal detection, the signal detection being applicable in 0-1000HZ all frequency range, sensing be isolated realize high-precision signal conversion be isolated, acquire, realize digital signal output again.
Description
Technical field
The utility model relates to electrical measurement technical fields, more particularly to a kind of three-phase AC/DC universal electrical measurement
Instrument.
Background technique
With the demand of energy-saving consumption-reducing, the technology of Frequency Drive Control is used to reach section on three-phase motor electrity market
The requirement of energy, converter technique is exactly to adjust the power of power load by adjusting the frequency of three-phase electricity, in three-phase electricity to frequency conversion
As soon as load will install a frequency converter additional, the frequency of three-phase electricity change after not within the scope of power frequency；Existing product in the market
Measurement be all measured with power frequency component based on, frequency range measures the range in 40Hz-70Hz, and internal measurement was all originally
It is big with amplitude measurement error in 40Hz low frequency signal difference below by the way of voltage and current transformer isolation measurement,
The lower error of frequency signal is bigger and is not capable of measuring direct current signal, is only applicable to the inspection of conventional three-phase main-frequency ac signal
It surveys, the detection of frequency converter output low frequency signal can not be suitable for；Traditional equipment is when frequency signal is 40Hz or less, measurement error
Very big, frequency is lower, and error is bigger, and most conference reaches 10% error, is unable to satisfy the high requirement of measurement accuracy.
Utility model content
The utility model realizes the general of three-phase alternating current-direct current signal detection, the signal being applicable in 0-1000HZ all frequency range
Detection, sensing realize that high-precision signal is converted and is isolated, acquires, realizes digital signal output again be isolated；This reality
It is better than 0.5% grade with new design product synthesis precision, in all frequency range of direct current to AC signal, former traditional three-phase
Multifunctional meter or electricity instrument can only use in the frequency signal range of power frequency 40Hz-70Hz, solve former traditional meter low
The problem of inaccuracy, three-phase voltage, electric current, power, power factor, the electricity that the present invention is surveyed are unable to measure or measured under frequency signal
The comprehensive parameters such as energy are all up to 0.5% class precision range.
The utility model achieves the above object through the following technical schemes:
A kind of three-phase AC/DC universal electricity measuring instrument includes: at least one set of voltage and current acquisition module；The voltage electricity
Flowing acquisition module includes A/D chip, isolated location, the first amplifier processing module, the second amplifier processing module, current sensor, electricity
Resistance.
As a kind of optimal technical scheme of the utility model, the A/D chip uses dedicated power chip CS5463,
It has been internally integrated △ ∑ integrator；So set, sample rate reaches 4K, by A/D chip collected voltage, electric current
Signal is transferred to MCU processor.
As a kind of optimal technical scheme of the utility model, the isolated location using linear optical coupling isolation technology come every
Waveform from transmission AC or DC signal, using AMC1200, AMC1201 chip；So set, the response speed of optocoupler is
NS grades, no response delay, using the AMC1200 series optocoupler of TI, optocoupler linear precision is better than 0.1%, and stability is good, guarantees
Direct current and AC signal can be transferred through optocoupler transmitting, and it is undistorted to transmit waveform.
As a kind of optimal technical scheme of the utility model, the current sensor is sensed using closed loop Hall current
Device measuring technique transmits the waveform of AC or DC signal, so set, closed loop Hall current sensor line precision height can
Reach 0.1%, the drift of stability inferred-zero, the Hall element dynamic response fast uS grades of response time is without phase delay；Current sense
Device uses the structure of 8.5mm penetration hole diameter, and direct conducting wire perforation input can effectively guarantee measurement exchange using positive negative output
The positive and negative waveform signal of signal, keeps waveform undistorted.Guarantee that the signal waveform of exchange and direct current is completely isolated transmitting output,
And transmitting waveform is undistorted.
As a kind of optimal technical scheme of the utility model, the resistance includes divider resistance and sample resistance, described
Divider resistance one end is connected to input voltage, and one end is connected to sample resistance so set, changing traditional decompression mode, surely
It is qualitative good.
Described resistance one end is connected to input voltage, and one end is connected to the first amplifier processing module；At first amplifier
Reason module is electrically connected to isolated location；The isolated location is electrically connected to A/D chip；The current sensor is electrically connected to second
Amplifier processing module；The second amplifier processing module is electrically connected to A/D chip.
A kind of three-phase AC/DC universal electricity measuring instrument further includes that MCU processor, isolated power supply, communication interface, network connect
Mouth, power processor, so set, output of products is had simultaneously using the communications protocol of the Modbus-RTU of RS485 interface standard
There is Ethernet interface communication output, using the network module of USR-K2 small size, the ICP/IP protocol of standard, network data is used
Transparent transmission mode；Voltage after isolated power supply conversion can be anti-interference, so that the electrical isolation between input and output；Power processor
By input power steady pressure treatment, and the voltage of 9-30V can be switched to 5V voltage.
Described power processor one end is electrically connected to power input line, and one end is electrically connected to isolated power supply, the isolation electricity
Source is electrically connected in the side of the first amplifier processing module and isolated location；The AD core of every group of voltage and current acquisition module
Piece is electrically connected to MCU processor；The communication interface, network interface are connected with MCU processor；The A/D chip, every
The other side, the second amplifier processing module from unit, current sensor, MCU processor, communication interface, network interface are electrically connected
It is connected to power processor.
As a kind of optimal technical scheme of the utility model, the MCU processor is provided with reservoir, the reservoir
It is connected to MCU processor, so set, collected voltage, current signal will be handled through MCU single-chip microcontroller and be transported by A/D chip
After calculation, the data that all operations are obtained are stored in reservoir.
As a kind of optimal technical scheme of the utility model, electricity measuring instrument equipment is arranged three groups of voltage and currents and acquires mould
Block, so set, precise information signal acquisition can be carried out for every one-phase circuit of three-phase circuit.
The utility model beneficial effect achieved is: realizing the general of three-phase alternating current-direct current signal detection, is applicable in 0-
Signal detection in 1000HZ all frequency range, sensing realize the conversion of high-precision signal and are isolated, acquire, again with being isolated
Realize digital signal output；The utility model devises product synthesis precision better than 0.5% grade, in direct current to the complete of AC signal
Within the scope of frequency, former traditional three-phase multi-functional table or electricity instrument can only use in the frequency signal range of power frequency 40Hz-70Hz,
Solve the problems, such as that former traditional meter is unable to measure or measure inaccuracy under low frequency signal, the three-phase voltage of the invention surveyed,
The comprehensive parameters such as electric current, power, power factor, electric flux are all up to 0.5% class precision range.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of three-phase AC/DC universal electricity measuring instrument described in the utility model；
Fig. 2 is a kind of current sensor measurement principle of three-phase AC/DC universal electricity measuring instrument described in the utility model
Figure；
Fig. 3 is a kind of original of the linear optical coupling isolation technology of three-phase AC/DC universal electricity measuring instrument described in the utility model
Reason figure；
The reference numerals are as follows:
1, voltage and current acquisition module；2, MCU processor；3, isolated power supply；4, communication interface；5, network interface；6, electric
Source processor；11, A/D chip；12, isolated location；13, the first amplifier processing module；14, the second amplifier processing module；15, electric
Flow sensor；16, resistance；21, reservoir；161, divider resistance；162, sample resistance.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
A kind of three-phase AC/DC universal electricity measuring instrument includes voltage and current acquisition module 1, MCU processor 2, isolated power supply
3, communication interface 4, network interface 5, power processor 6；The voltage and current acquisition module 1 includes A/D chip 11, isolated location
12, the first amplifier processing module 13, the second amplifier processing module 14, current sensor 15, resistance 16；The resistance 16 includes point
Piezoresistance 161, sample resistance 162；
First embodiment:
As shown in Figure 1, described 161 one end of divider resistance is connected to input voltage, one end is connected to sample resistance 162, institute
It states sample resistance 162 and is connected to the first amplifier processing module 13；The first amplifier processing module 13 is electrically connected to isolated location
12；The isolated location 12 is electrically connected to A/D chip 11；The current sensor 15 is electrically connected to the second amplifier processing module 14；
The second amplifier processing module 14 is electrically connected to A/D chip 11.
Described 6 one end of power processor is electrically connected to power input line, and one end is electrically connected to isolated power supply 3, the isolation
Power supply 3 is electrically connected side and the first amplifier processing module 13 in isolated location 12；Three groups of voltage and currents acquire mould
The A/D chip 11 of block 1 is electrically connected to MCU processor 2；The communication interface 4, network interface 5 are connected with MCU processor 2
It connects；The A/D chip 11, the other side of isolated location 12, the second amplifier processing module 14, current sensor 15, MCU processor
2, communication interface 4, network interface 5 are electrically connected to power processor 6；The MCU processor 2 is provided with reservoir 21, described
Reservoir 21 is connected to MCU processor 2.
As shown in Fig. 2, transmission AC or DC signal is isolated using linear optical coupling isolation technology for the isolated location 12
Waveform.
As shown in figure 3, the current sensor 15 uses Hall current sensor measuring technique, transmission AC or DC letter
Number waveform.
Second embodiment:
The difference of second embodiment and first embodiment is: three-phase AC/DC universal electricity measuring instrument equipment is arranged two groups
Voltage and current acquisition module 1.
3rd embodiment:
The difference of 3rd embodiment and first embodiment is: three-phase AC/DC universal electricity measuring instrument equipment is arranged one group
Voltage and current acquisition module 1.
The utility model beneficial effect achieved is: realizing the general of three-phase alternating current-direct current signal detection, is applicable in 0-
Signal detection in 1000HZ all frequency range, sensing realize the conversion of high-precision signal and are isolated, acquire, again with being isolated
Realize digital signal output；The utility model devises product synthesis precision better than 0.5% grade, in direct current to the complete of AC signal
Within the scope of frequency, former traditional three-phase multi-functional table or electricity instrument can only use in the frequency signal range of power frequency 40Hz-70Hz,
Solve the problems, such as that former traditional meter is unable to measure or measure inaccuracy under low frequency signal, the three-phase voltage of the invention surveyed,
The comprehensive parameters such as electric current, power, power factor, electric flux are all up to 0.5% class precision range.
The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry
It should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe this
The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change
And improvement, these various changes and improvements fall within the scope of the claimed invention.
Claims (7)
1. a kind of three-phase AC/DC universal electricity measuring instrument characterized by comprising at least one set of voltage and current acquisition module,
MCU processor, isolated power supply, communication interface, network interface, power processor；The power processor is electrically connected to isolation electricity
Source, the isolated power supply are electrically connected side and the first amplifier processing module in isolated location；Every group of voltage and current
The A/D chip of acquisition module is electrically connected to MCU processor；The communication interface, network interface are connected with MCU processor；
The A/D chip, the other side of isolated location, the second amplifier processing module, current sensor, MCU processor, communication interface, net
Network interface is electrically connected to power processor；The voltage and current acquisition module includes A/D chip, isolated location, at the first amplifier
Manage module, the second amplifier processing module, current sensor, resistance；Described resistance one end is electrically connected to input voltage, other end electricity
It is connected to the first amplifier processing module；The first amplifier processing module is electrically connected to isolated location；The isolated location is electrically connected
It is connected to A/D chip；The current sensor is electrically connected to the second amplifier processing module；The second amplifier processing module electrical connection
In A/D chip.
2. a kind of three-phase AC/DC universal electricity measuring instrument according to claim 1, which is characterized in that the A/D chip is adopted
With dedicated power chip CS5463, it is internally integrated △ ∑ integrator.
3. a kind of three-phase AC/DC universal electricity measuring instrument according to claim 1, which is characterized in that the isolated location
The waveform of transmission AC or DC signal is isolated using linear optical coupling isolation technology.
4. a kind of three-phase AC/DC universal electricity measuring instrument according to claim 1, which is characterized in that the current sense
Device uses Hall current sensor measuring technique, transmits the waveform of AC or DC signal.
5. a kind of three-phase AC/DC universal electricity measuring instrument according to claim 1, which is characterized in that the resistance includes
Divider resistance and sample resistance；Described divider resistance one end is connected to input voltage, and one end is connected to sample resistance.
6. a kind of three-phase AC/DC universal electricity measuring instrument according to claim 1, which is characterized in that the MCU processing
Device is provided with reservoir, and the reservoir is connected to MCU processor.
7. a kind of three-phase AC/DC universal electricity measuring instrument according to claim 1, which is characterized in that electricity measuring instrument is set
Three groups of voltage and current acquisition modules of standby setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822082980.0U CN209513935U (en) | 2018-12-12 | 2018-12-12 | A kind of three-phase AC/DC universal electricity measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822082980.0U CN209513935U (en) | 2018-12-12 | 2018-12-12 | A kind of three-phase AC/DC universal electricity measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209513935U true CN209513935U (en) | 2019-10-18 |
Family
ID=68194277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822082980.0U Active CN209513935U (en) | 2018-12-12 | 2018-12-12 | A kind of three-phase AC/DC universal electricity measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209513935U (en) |
-
2018
- 2018-12-12 CN CN201822082980.0U patent/CN209513935U/en active Active
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