CN109962449A - A kind of short-circuit protection and overload detection circuit for MBus main website circuit - Google Patents
A kind of short-circuit protection and overload detection circuit for MBus main website circuit Download PDFInfo
- Publication number
- CN109962449A CN109962449A CN201711435173.6A CN201711435173A CN109962449A CN 109962449 A CN109962449 A CN 109962449A CN 201711435173 A CN201711435173 A CN 201711435173A CN 109962449 A CN109962449 A CN 109962449A
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- Prior art keywords
- circuit
- mbus
- short
- sub
- main website
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000011084 recovery Methods 0.000 claims abstract description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000001052 transient effect Effects 0.000 claims description 5
- 230000001629 suppression Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H02J13/0062—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to fields of communication technology; it is proposed a kind of short-circuit protection and overload detection circuit for MBus main website circuit; sub-circuit is exported including short-circuit protection sub-circuit, overload detection sub-circuit, MBus, is connected between each section with conducting wire, and install on circuit boards.Short-circuit protection sub-circuit uses self-recovery fuse as protection element, has the characteristics that response is fast, high reliablity, can restore automatically；Overload detection sub-circuit passes through the ground level that the voltage signal sampled is input to NPN type silicon triode, when the conducting voltage that voltage signal is more than triode has the characteristics that structure is simple, easy to use with regard to output overloading signal.Circuit of the present invention is simple and reliable, easy to use and be easily achieved, and equipment cost is low, so the present invention has a good application prospect.
Description
The present invention relates to fields of communication technology, and in particular to a kind of short-circuit protection for MBus main website circuit and overload inspection
Slowdown monitoring circuit.
Background technique
MBus has that strong antijamming capability, communication distance be remote, power supply mode as a kind of semiduplex communication technology of principal and subordinate
The features such as versatile and flexible, is widely used in the data acquisition of various intelligence instruments.The short-circuit protection of traditional MBus main website circuit
Often more complicated with overload protecting circuit, and reliability is not high, complicated circuit leads to increased costs, reliability not Gao Ze
It will lead to the damage in MBus bus short circuit of MBus host circuit, or lead to communication mistake in overload.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of simple and reliable circuit structure, strong antijamming capability, can provide real-time mistake
What load can be restored to work normally automatically with short-circuit protection and after short trouble or overload fault are eliminated is used for MBus main website
The short circuit of circuit and overload protecting circuit.
To solve the above problems, the technical scheme adopted by the invention is as follows: a kind of short-circuit protection for MBus main website circuit
And overload detection circuit, it is characterised in that: export sub-circuit including short-circuit protection sub-circuit, overload detection sub-circuit, MBus, respectively
It is connected, and installed on circuit boards with conducting wire between part.Wherein the input terminal (MBusTX) of short-circuit protection sub-circuit meets MBus
The first output end (Short) output short-circuit of the MBus bus signals transmitting terminal of main website circuit, short-circuit protection sub-circuit indicates letter
Number, the processor pin of MBus main website circuit is connect, the second output terminal (MBus+) of short-circuit protection sub-circuit connects MBus output
The input terminal (MBus+) of circuit；The input terminal (OverloadDetection) of overload detection sub-circuit connects MBus output son electricity
First output end on road, output end (OverLoad) output overloading indication signal of overload detection sub-circuit connect MBus main website electricity
The processor pin on road；The input terminal (MBus+) of MBus output sub-circuit meets the second output terminal of short-circuit protection sub-circuit, MBus
The first output end (OverloadDetection) of short-circuit protection sub-circuit connects the input terminal of overload detection sub-circuit, and MBus is defeated
The second output terminal (MBusReceive) of sub-circuit connects the MBus signal receiving module input terminal of MBus main website circuit out.MBus
The processor of the power input conducting wire of short-circuit protection sub-circuit and MBus overload detection sub-circuit and MBus main website circuit electricity
Source VCC connection.
The short-circuit protection sub-circuit is made of self-recovery fuse, 3 resistance and 1 photoelectrical coupler, is led to therebetween
Conducting wire connection is crossed, self-recovery fuse can be one or more, be connected in bus when being multiple, the reality that the present invention provides
Example is three identical self-recovery fuse series connection, i.e. F1, F2, F3.MBus bus from MBus main website circuit sends signal
MBusTX is output to MBus output sub-circuit by self-recovery fuse.When MBus bus short circuit, the electric current in bus is rapid
Increase, when electric current is more than the rated current of self-recovery fuse, i.e. 1 (I of threshold values1) when, self-recovery fuse cut-off, to turn off
Bus, electric current passes through short circuit current limitation resistance R3 all the way and flows to GND at this time, and another way passes through R4, the 1 of photoelectrical coupler, 2 pins,
GND is returned to using the bus and sampling resistor R5 and R6 of short circuit, causes photoelectrical coupler to be connected, short-circuit indication signal output end
(Short) it is pulled low, which is output to the processor of MBus main website circuit, to do corresponding processing.
The overload detection sub-circuit is made of a resistance and a NPN type silicon triode (Q2).When normal work,
The V of Q2beLess than 0.7 volt, i.e., Q2 is not turned on；When the slave station quantity connect in MBus bus be more than load quantity when, bus it is upper
Electric current be more than 2 (I of threshold values2), cause Q2 to be connected, it may be assumed that I2* R5 > 0.7V, the at this time output end of overload detection sub-circuit
(OverLoad) it is pulled low, which is output to the processor of MBus main website circuit, to do corresponding processing.
The MBus output sub-circuit inhibits two by sampling resistor R5 and R6, AC signal sampling capacitance C1 and transient state
Pole pipe TVS composition, Transient Suppression Diode TVS are used to consider the momentary spikes electric current except in MBus bus, and J1 terminal is for external
Corresponding MBus bus.
Circuit structure of the present invention is simple and reliable, strong antijamming capability, is able to achieve overload and short-circuit protection in real time, and work as
Short trouble or overload fault can be restored to work normally automatically after eliminating.
Detailed description of the invention
Fig. 1 is short-circuit protection sub-circuit figure；
Fig. 2 is overload detection sub-circuit figure；
Fig. 3 is that MBus sends sub-circuit figure；
Fig. 4 is overall circuit figure of the invention；
Specific embodiment
A kind of short-circuit protection and overload detection circuit for MBus main website circuit, it is characterised in that: including short-circuit protection
Sub-circuit, overload detection sub-circuit, MBus export sub-circuit, are connected between each section with conducting wire, and install on circuit boards.Its
The input terminal (MBusTX) of middle short-circuit protection sub-circuit connects the MBus bus signals transmitting terminal of MBus main website circuit, short-circuit protection
The first output end (Short) output short-circuit indication signal of circuit connects the processor pin of MBus main website circuit, short-circuit protection
The second output terminal (MBus+) of circuit connects the input terminal (MBus+) of MBus output sub-circuit；The input terminal of overload detection sub-circuit
(OverloadDetection) the first output end of MBus output sub-circuit, the output end of overload detection sub-circuit are connect
(OverLoad) output overloading indication signal connects the processor pin of MBus main website circuit；The input terminal of MBus output sub-circuit
(MBus+) second output terminal of short-circuit protection sub-circuit, the first output end of MBus short-circuit protection sub-circuit are connect
(OverloadDetection) input terminal of overload detection sub-circuit is connect, MBus exports the second output terminal of sub-circuit
(MBusReceive) the MBus signal receiving module input terminal of MBus main website circuit is connect.MBus short-circuit protection sub-circuit and MBus
The power input conducting wire of overload detection sub-circuit is connect with the processor power supply VCC of MBus main website circuit.
The short-circuit protection sub-circuit is as shown in Figure 1.MBus bus from MBus main website circuit sends signal
MBusTX is output to MBus output sub-circuit by three concatenated self-recovery fuse F1, F2, F3, when MBus bus short circuit
When, the electric current in bus increases sharply, when electric current is more than the rated current of self-recovery fuse, i.e. 1 (I of threshold values1) when, self- recoverage
Fuse cut-off, to turn off bus, electric current passes through short circuit current limitation resistance R3 all the way and flows to GND at this time, and another way passes through R4, light
1,2 pins of electric coupler return to GND using the bus and sampling resistor R5, R6 of short circuit, photoelectrical coupler are caused to be connected,
Short-circuit indication signal output end (Short) is pulled low, which is output to the processor of MBus main website circuit, corresponding to do
Processing.Illustrate: the concatenated quantity of self-recovery fuse is not intended to limit the present invention, can be one, or multiple.
The overload detection sub-circuit is as shown in Figure 2.When normal work, the V of Q2beLess than 0.7 volt, i.e., Q2 is not turned on；
When the slave station quantity connect in MBus bus is more than load quantity, the upper electric current of bus is more than 2 (I of threshold values2), lead to Q2
Conducting, it may be assumed that I2* R5 > 0.7V, the output end (OverLoad) of overload detection sub-circuit is pulled low at this time, which is output to
The processor of MBus main website circuit, to do corresponding processing.
The MBus output sub-circuit is as shown in figure 3, Transient Suppression Diode TVS is used to consider the wink except in MBus bus
Between peak current, J1 terminal is used for external corresponding MBus bus, and R5 and R6 are the sampling resistor that MBus receives signal, C1's
Effect is considered except direct current signal, and effective AC signal is obtained.
As shown in figure 4, the resistance value of resistance R3 is 100K ohm；The resistance value of resistance R4 is 10K ohm；R5 and R6 is MBus
The sampling resistor of signal is received, resistance value is 5 ohm after the series connection of two resistance, and wherein R6 is the sampling resistor of bus overload signal,
Resistance value determines by threshold values 2, i.e. I2* R5=0.7V；The resistance value of resistance R7, R8 are 1K；The capacity of capacitor C1 is 10uF；Q2 is
NPN type silicon triode, i.e. its conduction voltage drop are 0.7V；The load current value of self-recovery fuse F1, F2, F3 take the 1.5 of threshold values 2
Times；Photoelectrical coupler model PC817.
It illustrates, the parameter of each device is preferred embodiments of the present invention, is not intended to limit the invention, all at this
Any modification, equivalent substitution, improvement and etc. are done in invention spirit, should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of short-circuit protection and overload detection circuit for MBus main website circuit, it is characterised in that: including short-circuit protection
Circuit, overload detection sub-circuit, MBus export sub-circuit, are connected between each section with conducting wire, and install on circuit boards.Wherein
The input terminal (MBusTX) of short-circuit protection sub-circuit connects the MBus bus signals transmitting terminal of MBus main website circuit, short-circuit protection electricity
First output end (Short) the output short-circuit indication signal on road connects the processor pin of MBus main website circuit, short-circuit protection electricity
The second output terminal (MBus+) on road meets the MBus+ of MBus output sub-circuit；The input terminal of overload detection sub-circuit
(OverloadDetection) the first output end of MBus output sub-circuit, the output end of overload detection sub-circuit are connect
(OverLoad) output overloading indication signal connects the processor pin of MBus main website circuit；The input terminal of MBus output sub-circuit
(MBus+) second output terminal of short-circuit protection sub-circuit, the first output end of MBus short-circuit protection sub-circuit are connect
(OverloadDetection) input terminal of overload detection sub-circuit is connect, MBus exports the second output terminal of sub-circuit
(MBusReceive) input terminal of the MBus signal receiving circuit of MBus main website circuit is connect.MBus short-circuit protection sub-circuit and
The power input conducting wire of MBus overload detection sub-circuit is connect with the processor power supply VCC of MBus main website circuit.
2. a kind of short-circuit protection and overload detection circuit for MBus main website circuit according to claim 1, feature
It is that short-circuit protection sub-circuit is made of self-recovery fuse, 3 resistance and 1 photoelectrical coupler, is connected therebetween by conducting wire,
Self-recovery fuse can be one or more, for it is multiple when be connected in bus, the example that the present invention provides be three from
Restore fuse series connection, i.e. F1, F2, F3.MBus bus from MBus main website circuit sends signal MBusTX and passes through self- recoverage
Fuse is output to MBus output sub-circuit.When MBus bus short circuit, the electric current in bus increases sharply, when electric current is more than certainly
Restore the rated current of fuse, i.e. 1 (I of threshold values1) when, self-recovery fuse cut-off, to turn off bus, electric current is all the way at this time
Flow to GND by short circuit current limitation resistance R3, another way passes through R4, the 1 of photoelectrical coupler, 2 pins, using short circuit bus and
Sampling resistor R5 and R6 return to GND, and photoelectrical coupler is caused to be connected, and short-circuit indication signal output end (Short) is pulled low, the letter
It number is output to the processor of MBus main website circuit, to do corresponding processing.
3. a kind of short-circuit protection and overload detection circuit for MBus main website circuit according to claim 1, feature
It is that overload detection sub-circuit is made of a resistance and a NPN type silicon triode.When normal work, the V of Q2beLess than 0.7
Volt, i.e., Q2 is not turned on；When the slave station quantity connect in MBus bus is more than load quantity, the upper electric current of bus is more than threshold values
2(I2), cause Q2 to be connected, it may be assumed that I2* R5 > 0.7, the output end (OverLoad) of overload detection sub-circuit is pulled low at this time, the letter
It number is output to the processor of MBus main website circuit, to do corresponding processing.
4. a kind of short-circuit protection and overload detection circuit for MBus main website circuit according to claim 1, feature
It is MBus output sub-circuit by sampling resistor R5 and R6, AC signal sampling capacitance C1 and Transient Suppression Diode TVS group
At Transient Suppression Diode TVS is used to consider the momentary spikes electric current except in MBus bus, and J1 terminal is used for external corresponding MBus
Bus, R5 and R6 are the sampling resistor that MBus receives signal, and the effect of C1 is considered except direct current signal, obtain effectively exchanging letter
Number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435173.6A CN109962449A (en) | 2017-12-26 | 2017-12-26 | A kind of short-circuit protection and overload detection circuit for MBus main website circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435173.6A CN109962449A (en) | 2017-12-26 | 2017-12-26 | A kind of short-circuit protection and overload detection circuit for MBus main website circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109962449A true CN109962449A (en) | 2019-07-02 |
Family
ID=67022342
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711435173.6A Pending CN109962449A (en) | 2017-12-26 | 2017-12-26 | A kind of short-circuit protection and overload detection circuit for MBus main website circuit |
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| CN (1) | CN109962449A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201887744U (en) * | 2010-12-09 | 2011-06-29 | 利尔达科技有限公司 | M-Bus (meter-bus) level conversion circuit |
| CN102437549A (en) * | 2011-12-23 | 2012-05-02 | 北京天源科创风电技术有限责任公司 | Two-bus short-circuit protective isolation device and method |
| CN205160033U (en) * | 2015-11-24 | 2016-04-13 | 深圳市捷先数码科技股份有限公司 | M -Bus bus protector with from recovery function |
| CN105809941A (en) * | 2016-03-15 | 2016-07-27 | 安阳工学院 | MBUS heat meter data collection controller and collection method |
| CN206727631U (en) * | 2017-04-17 | 2017-12-08 | 积成电子股份有限公司 | A kind of MBUS Host Protections circuit |
-
2017
- 2017-12-26 CN CN201711435173.6A patent/CN109962449A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201887744U (en) * | 2010-12-09 | 2011-06-29 | 利尔达科技有限公司 | M-Bus (meter-bus) level conversion circuit |
| CN102437549A (en) * | 2011-12-23 | 2012-05-02 | 北京天源科创风电技术有限责任公司 | Two-bus short-circuit protective isolation device and method |
| CN205160033U (en) * | 2015-11-24 | 2016-04-13 | 深圳市捷先数码科技股份有限公司 | M -Bus bus protector with from recovery function |
| CN105809941A (en) * | 2016-03-15 | 2016-07-27 | 安阳工学院 | MBUS heat meter data collection controller and collection method |
| CN206727631U (en) * | 2017-04-17 | 2017-12-08 | 积成电子股份有限公司 | A kind of MBUS Host Protections circuit |
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Application publication date: 20190702 |
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