CN108614142A - A kind of improved electric power terminal - Google Patents
A kind of improved electric power terminal Download PDFInfo
- Publication number
- CN108614142A CN108614142A CN201810407342.3A CN201810407342A CN108614142A CN 108614142 A CN108614142 A CN 108614142A CN 201810407342 A CN201810407342 A CN 201810407342A CN 108614142 A CN108614142 A CN 108614142A
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- CN
- China
- Prior art keywords
- pressure side
- electric power
- power terminal
- module
- isolated part
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Classifications
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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
-
- 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
- G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
- G01R21/1331—Measuring real or reactive component, measuring apparent energy
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electrotherapy Devices (AREA)
Abstract
The present invention relates to a kind of improved electric power terminal, including high pressure side section (1), the high pressure side section (1) includes voltage sample module (11)；The low-pressure side part (2) being connected with high pressure side section (1), the low-pressure side part (2) include control module (21)；The high pressure side section (1) further includes the metering module (12) for the first signal for being configured to receiving voltage sampling module (11) output；The low-pressure side part (2) further includes that the second signal for being configured to export metering module (12) carries out electrical isolation, and the second signal after isolation is exported to the first isolated part (3) of control module (21).Compared with the existing technology, electric power terminal of the invention has the characteristics that safe, at low cost, simple production process is efficient.
Description
Technical field
The present invention relates to charging field more particularly to a kind of improved electric power terminals.
Background technology
Electric power terminal typically is provided with function of measuring, in order to ensure it normally can effectively work, and has good insulating properties
Can, designer would generally realize function of measuring using sampling resistor+voltage transformer mode, specific as shown in Figure 1.Primary side is logical
Over-sampling resistance (R1~R9) is connected with voltage transformer pt 1, and sampled signal is coupled to secondary by the mutual inductor that the turn ratio is 1: 1
Side, secondary side signal are connect with computation chip, and secondary side sampling resistor is according to the limiting value and PT1 secondary sides in computation chip channel
Load value adjusts, and computation chip communicated by SPI modes with MCU.
This kind of mode can realize being isolated for primary side (i.e. high-pressure side) and secondary side (i.e. low-pressure side) by voltage transformer,
Ensure the safety of computation chip and the sides MCU (i.e. low-pressure side).
But this kind of mode be there are many deficiencies, if to be susceptible to angular difference at high temperature bigger than poor no-load voltage ratio for voltage transformer, leads
It causes electric power terminal detection error larger, influences to measure precision；In order to meet the pressure-resistant performance of end product, this kind of scheme uses
Voltage transformer need to have good resistance to pressure, this necessarily cause voltage transformer cost improve, if in order to cost-effective
Using the voltage transformer of low performance, then product fraction defective can be caused to improve；Meanwhile this kind of mode need to use three voltages simultaneously
Mutual inductor is SMT- Reflow Solderings-plug-in unit-wave-soldering as plug-in unit device, corresponding production process, and complex procedures lead to efficiency
Lowly.
Invention content
In view of the above problems, it is good that the purpose of the present invention is to provide a kind of linearities, and measurement error is small under high and low temperature environment,
It is safe, while production cost is low, the efficient electric power terminal of simple production process.
To achieve the goals above, the technical solution adopted by the present invention is：A kind of improved electric power terminal, including
High pressure side section, the high pressure side section include voltage sample module；
The low-pressure side part being connected with high pressure side section, the low pressure side point includes control module；
It is characterized in that：
The high pressure side section further includes the metering module for the first signal for being configured to the output of receiving voltage sampling module；
The low-pressure side part further includes that the second signal for being configured to export metering module carries out electrical isolation, and will be every
Second signal from after is exported to the first isolated part of control module.
In order to improve production efficiency, simplify production technology, it is preferred that the isolated part is patch type isolating chip.
Preferably, the electric power terminal further includes positioned at the pulse indication end of low-pressure side part；
The pulse indication end is connected by the second isolated part with the metering module of high pressure side section, metering module output
Active pulse signal control the second isolated part turn-on and turn-off, to realize the bright sudden strain of a muscle of pulse indicator light.Second isolation
There is device optocoupler isolation characteristic, realization high-pressure side to be isolated with low-side signal.
Preferably, the electric power terminal further includes the marker signal test lead positioned at low-pressure side part；
The marker signal test lead is connected by third isolated part with the metering module of high pressure side section, metering module
The turn-on and turn-off of the active pulse signal control third isolated part of output, to control the signal of external equipment.Second every
From device optocoupler there is isolation characteristic, realization high-pressure side to be isolated with low-side signal.
In order to realize that active test lead and pulse indication end have synchronism, it is preferred that second isolated part and the
Three isolated parts are connected commonly through triode control conducting and shutdown, the transistor base with metering module.
Preferably, second isolated part and third isolated part are optocoupler.
Preferably, the triode is NPN type triode.
Preferably, pass through spi bus between the metering module and the first isolated part, the first isolated part and control module
It is communicated.
Preferably, the metering module is computation chip, control module MCU.
Preferably, the first signal of the voltage sample module exports after the processing of RC filter circuits to metering module,.
Compared with the prior art, the advantages of the present invention are as follows：Previous voltage transformer is removed in voltage sample part, only
It is sampled using sampling resistor, it will be on high-tension side metering module and in the control module of low-pressure side using isolating device
It is isolated, while isolating device realizes the normal communication of metering module and low-pressure side control module by SPI communication mode,
This design eliminates the voltage transformer for needing grafting, is left in high-pressure side and carry out sampling sampling resistor using only resistance and can make
With the small precision resistance of temperature drift, realize that high/low temperature condition down-sampling error change is small, effectively preventing high temperature leads to mutual induction of voltage
The not accurate problem of metering caused by device angular difference is bigger than difference variation, while isolated part is surface-mounted device, simplifies production technology
Flow improves production efficiency, and since surface-mounted device price is low, performance is good, further reduced production cost.
Description of the drawings
Fig. 1 is the electric power terminal internal structure schematic diagram in existing design.
Fig. 2 is a kind of corresponding internal structure schematic diagram of embodiment of the improved electric power terminal of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
If Fig. 1 shows a kind of example structure figure of the improved electric power terminal of the present invention, which includes high pressure
Side section 1, the low-pressure side part 2 being connected with high pressure side section 1.
As shown in Figure 1, the high pressure side section 1 includes voltage sample module, to be configured to receiving voltage sampling module 11 defeated
The metering module 12 of the first signal gone out, the low-pressure side part 2 include control module 21 and are configured to metering module 12
The second signal of output carries out electrical isolation, and the second signal after isolation is exported to the first isolated part of control module 21
3。
Specifically, in the present embodiment, first isolated part 3 is patch type isolating chip.The isolated core of patch type
Piece, which avoids previous voltage transformer, needs grafting, causes the problem of technological process complexity, simultaneously because cheap so that production
Cost is reduced significantly, in addition, voltage sample part has used resistance to carry out the good advantage of sampling high/low temperature condition lower linear degree, is kept away
Angular difference is than the situation that difference variation causes error change big greatly under mutual inductor high/low temperature condition before having exempted from, to help to improve meter
Measure the metering precision of module 12；And isolating device 3 can be effectively by the control module of on high-tension side metering module and low-pressure side
It realizes electrical isolation, ensures low-pressure side processing safety, will not lead to low-pressure side voltage liter voltage sample resistance damages
Height avoids electric shock phenomenon from occurring, and isolating device 3 can realize that low-pressure side control module and the SPI of high-pressure side metering module are gone here and there
Port communications.
With continued reference to Fig. 1, the electric power terminal further includes the pulse indication end 23 positioned at low-pressure side part 2, in order into one
Step improves the safety of electric power terminal, the metering mould that the pulse indication end 23 passes through the second isolated part 4 and high pressure side section 1
Block 12 is connected, to be converted into being suitable for the digital signal of low-pressure side after on high-tension side forceful electric power AC signal separation purifying.Equally,
12 phase of metering module that marker signal test lead 24 positioned at low-pressure side part 2 passes through third isolated part 5 and high pressure side section 1
Even, convenient for will be converted into being suitable for the digital signal of low-pressure side after on high-tension side forceful electric power AC signal separation purifying, further to carry
The safety of high electric power terminal.
Since metering module is in high-pressure side, it is connected with forceful electric power, and control module is in low-pressure side, operator needs frequent
Contact, so electrical isolation can be realized using second, third isolated part 4,5 well, to efficiently accomplish signal transmission, really
It ensures safety.
In the present embodiment, second isolated part 4 and third isolated part 5 are optocoupler, it is of course also possible to
It is other components with electrical isolation effect and suitable for low-pressure side.
Meanwhile in order to realize the synchronism of active test lead and pulse indication end, second isolated part 4 and third
Isolated part 5 commonly through triode 6 carry out control shutdown and conducting, such as used in the present embodiment NPN type triode with
Metering module is connected, it should be mentioned that the electronic component with automatic shutoff function such as metal-oxide-semiconductor can also be used to connect.
In order to further save the inner space of electric power terminal, the metering module 12 and the first isolated part 3, first every
It is communicated by spi bus between component 3 and control module 21.In the present embodiment, the metering module 12 is metering core
Piece, control module 21 are MCU.Meanwhile the first signal of the sampling module 11 after the processing of RC filter circuits output to measuring
Module.
Other than above-mentioned improvement, other similar improvement are also contained in the improvement threshold of the present invention, are not just existed herein
It repeats.Although an embodiment of the present invention has been shown and described, it will be appreciated by those skilled in the art that：The present invention is not being departed from
Principle and objective in the case of can to these embodiments carry out it is a variety of variation, modification, replace and deformation, the scope of the present invention
It is limited by claim and its equivalent.
Claims (10)
1. a kind of improved electric power terminal, including,
High pressure side section (1), the high pressure side section (1) include voltage sample module (11)；
The low-pressure side part (2) being connected with high pressure side section (1), the low-pressure side part (2) include control module (21)；
It is characterized in that：
The high pressure side section (1) further includes the metering module for the first signal for being configured to receiving voltage sampling module (11) output
(12)；
The low-pressure side part (2) further includes the second signal progress electrical isolation for being configured to export metering module (12), and
Second signal after isolation is exported to the first isolated part (3) of control module (21).
2. improved electric power terminal according to claim 1, it is characterised in that：
The isolated part (3) is patch type isolating chip.
3. improved electric power terminal according to claim 1, it is characterised in that：
The electric power terminal further includes positioned at the pulse indication end (23) of low-pressure side part (2)；
The pulse indication end (23) is connected by the second isolated part (4) with the metering module (12) of high pressure side section (1)；
The active pulse signal of metering module (12) output controls the turn-on and turn-off of the second isolated part (4), to real
The bright sudden strain of a muscle of existing pulse indicator light.
4. improved electric power terminal according to claim 3, it is characterised in that：
The electric power terminal further includes the marker signal test lead (24) positioned at low-pressure side part (2)；
Metering module (12) phase that the marker signal test lead (24) passes through third isolated part (5) and high pressure side section (1)
Even；
The turn-on and turn-off of the active pulse signal control third isolated part (5) of metering module (12) output, to control
The signal of external equipment processed.
5. improved electric power terminal according to claim 4, it is characterised in that：
Second isolated part (4) and third isolated part (5) are commonly through triode control conducting and shutdown, three pole
Pipe base stage is connected with metering module (12).
6. improved electric power terminal according to claim 4, it is characterised in that：
Second isolated part (4) and third isolated part (5) are optocoupler.
7. improved electric power terminal according to claim 5, it is characterised in that：
The triode (6) is NPN type triode.
8. improved electric power terminal according to claim 1, it is characterised in that：
Pass through SPI between the metering module (12) and the first isolated part (3), the first isolated part (3) and control module (21)
Bus is communicated.
9. improved electric power terminal according to claim 1, it is characterised in that：
The metering module (12) is computation chip, and control module (21) is MCU.
10. improved electric power terminal according to claim 1, it is characterised in that：
First signal of the voltage sample module (11) exports after the processing of RC filter circuits to metering module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810407342.3A CN108614142A (en) | 2018-04-28 | 2018-04-28 | A kind of improved electric power terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810407342.3A CN108614142A (en) | 2018-04-28 | 2018-04-28 | A kind of improved electric power terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108614142A true CN108614142A (en) | 2018-10-02 |
Family
ID=63661879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810407342.3A Pending CN108614142A (en) | 2018-04-28 | 2018-04-28 | A kind of improved electric power terminal |
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| Country | Link |
|---|---|
| CN (1) | CN108614142A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09281151A (en) * | 1996-04-18 | 1997-10-31 | Yazaki Corp | Voltage sensor |
| GB2321713A (en) * | 1997-02-01 | 1998-08-05 | Motorola Israel Ltd | High-voltage transmission line data transfer system |
| CN201117424Y (en) * | 2007-11-07 | 2008-09-17 | 北京航空航天大学 | Electronic type current mutual inductor |
| CN201159748Y (en) * | 2008-02-02 | 2008-12-03 | 镇江市丹高电器有限公司 | Intelligent electric power metering installation |
| CN201332015Y (en) * | 2008-12-30 | 2009-10-21 | 张航生 | Electron type current transformer |
| CN201819951U (en) * | 2010-10-14 | 2011-05-04 | 珠海威瀚科技发展有限公司 | Digital high-voltage metering device and metering system thereof |
| CN102539906A (en) * | 2010-12-21 | 2012-07-04 | 珠海威瀚科技发展有限公司 | Digital high-voltage metering device and metering system thereof |
-
2018
- 2018-04-28 CN CN201810407342.3A patent/CN108614142A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09281151A (en) * | 1996-04-18 | 1997-10-31 | Yazaki Corp | Voltage sensor |
| GB2321713A (en) * | 1997-02-01 | 1998-08-05 | Motorola Israel Ltd | High-voltage transmission line data transfer system |
| CN201117424Y (en) * | 2007-11-07 | 2008-09-17 | 北京航空航天大学 | Electronic type current mutual inductor |
| CN201159748Y (en) * | 2008-02-02 | 2008-12-03 | 镇江市丹高电器有限公司 | Intelligent electric power metering installation |
| CN201332015Y (en) * | 2008-12-30 | 2009-10-21 | 张航生 | Electron type current transformer |
| CN201819951U (en) * | 2010-10-14 | 2011-05-04 | 珠海威瀚科技发展有限公司 | Digital high-voltage metering device and metering system thereof |
| CN102539906A (en) * | 2010-12-21 | 2012-07-04 | 珠海威瀚科技发展有限公司 | Digital high-voltage metering device and metering system thereof |
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| PB01 | Publication | ||
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Application publication date: 20181002 |