CN106130370A - Communicator copied by Switching Power Supply and electrical isolation method, multilist collection - Google Patents
Communicator copied by Switching Power Supply and electrical isolation method, multilist collection Download PDFInfo
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- CN106130370A CN106130370A CN201610699671.0A CN201610699671A CN106130370A CN 106130370 A CN106130370 A CN 106130370A CN 201610699671 A CN201610699671 A CN 201610699671A CN 106130370 A CN106130370 A CN 106130370A
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- secondary coil
- transformator
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- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
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Abstract
The embodiment of the present invention provides Switching Power Supply and the electrical isolation method of Switching Power Supply, multilist collection to copy communicator, and wherein, Switching Power Supply includes: control circuit and transformator；External power source couples with the primary coil of transformator, and the primary coil of transformator couples with control circuit, and the secondary coil of transformator is multiple, and each secondary coil of transformator all couples with the primary coil of transformator；Each secondary coil of transformator all couples with outside load.It is multiple voltage signal by the input voltage regulation of external power source that transformator is used for the galvanomagnetic-effect of multiple secondary coils of the primary coil by transformator and transformator, and each voltage signal is exported load, so that external power source is isolated with load electrical.Electrical isolation between primary coil and the secondary coil of transformator achieves the electrical isolation of 4KV between external power source and load.And the electrical isolation between each secondary coil of transformator, it is achieved that the electrical isolation of 4KV between loading and loading.
Description
Technical field
The present invention relates to technical field of electricity, in particular to a kind of Switching Power Supply and electrical isolation method, multilist collection
Copy communicator.
Background technology
Along with development and the raising of science and technology, existing ammeter technology realizes remote meter reading by electric power Ji Chaopingtai
And monitoring has been obtained for being widely applied, but water meter, gas meter and hotlist etc. the most also need by manual metering or remote meter reading
System (Symphonic Mbus, MBUS) carries out collection and copies.The existence labor intensity of manual metering is big, efficiency is low and high in cost of production lacks
Point.Mbus meter reading method not only needs rewiring, and owing to it is incompatible with the mode of ammeter's reading meter, so that by turning
Change after circuit changes, multilist collection could be realized and copy.But in the change-over circuit of prior art, the volume and weight of change-over circuit
Greatly, conversion efficiency is low, and power consumption is high, and between each circuit of change-over circuit, interference free performance and insulating properties are the most poor.Therefore, as
How realization is stable, safe and reliable multilist collection is copied is current industry a great problem.
Summary of the invention
It is an object of the invention to provide a kind of Switching Power Supply and electrical isolation method, communicator copied by multilist collection, its energy
Enough it is effectively improved multilist collection and copies the reliability of communicator, stability and safety.
First aspect, the embodiment of the present invention provides a kind of Switching Power Supply, including: control circuit and transformator；External power source
Coupling with the primary coil of described transformator, the described primary coil of described transformator couples with described control circuit, described change
The secondary coil of depressor is multiple, each described secondary coil of described transformator all with the described primary coil of described transformator
Coupling；The each described secondary coil of described transformator the most all couples with outside load.Described control circuit is used for clearance-type
Turn on the described primary coil of described transformator and coupling of described external power source, to regulate the letter of described external power source input
Number.Described transformator is used for the multiple described secondary coil of the described primary coil by described transformator and described transformator
The input voltage regulation of described external power source is multiple voltage signal by galvanomagnetic-effect, and is exported by each described voltage signal
Described load, so that described external power source is isolated with described load electrical.
Further, the multiple described secondary coil of described transformator includes: the first secondary coil, the second secondary coil and
3rd secondary coil；Described first secondary coil couples with described control circuit, and described second secondary coil and first is remotely copied
Table interface couples, described 3rd secondary coil and the coupling of the second remote meter reading interface.
Further, the multiple described secondary coil of described transformator also includes: the 4th secondary coil, described 4th secondary
Coil and the coupling of the first communication interface.
Further, described 3rd secondary coil includes: the first sub-secondary coil, the second sub-secondary coil and the 3rd son are secondary
Sideline is enclosed；Described first sub-secondary coil, described second sub-secondary coil and described 3rd sub-secondary coil couple successively；Described
First sub-secondary coil couples with described second remote meter reading interface, described second sub-secondary coil with for carrier wave and channel radio
Second communication interface coupling of letter, described 3rd sub-secondary coil couples with controlling interface.
Further, described Switching Power Supply includes: the first mu balanced circuit, the second mu balanced circuit and the 3rd mu balanced circuit, institute
The input stating the first mu balanced circuit couples with described second secondary coil, the outfan of described first mu balanced circuit and described the
One remote meter reading interface coupling；The input of described second mu balanced circuit couples with described 3rd sub-secondary coil, and described second
The outfan of mu balanced circuit couples with described second remote meter reading interface；The input and the described 4th of described 3rd mu balanced circuit
Secondary coil couples, and the outfan of described 3rd mu balanced circuit also couples with described first communication interface.
Further, described Switching Power Supply also includes: the first protective circuit of voltage regulation and the second protective circuit of voltage regulation, described
The input of one protective circuit of voltage regulation couples with described second sub-secondary coil, the outfan of described first protective circuit of voltage regulation with
Described second communication interface coupling；The input of described second protective circuit of voltage regulation couples with described 3rd sub-secondary coil, institute
The outfan stating the second protective circuit of voltage regulation also couples with described control interface.
Further, described Switching Power Supply also includes feedback circuit, and described feedback circuit input is second steady with described
Volt circuit couples, and described feedback circuit output couples with the input of described control circuit.
Further, described feedback circuit includes: the first photoelectrical coupler, and described first photoelectrical coupler includes: first
Light emitting diode and the first phototriode, the two ends of described first light emitting diode all couple with described control interface, described
The colelctor electrode of the first phototriode couples with the input of described control circuit.
Second aspect, the embodiment of the present invention also provides for a kind of multilist collection and copies communicator, and described communication module includes: first
Communication module, second communication module, the first remote meter reading module and the second remote meter reading module for carrier wave and radio communication.
Described first communication module couples with the outfan of described 3rd mu balanced circuit, described second communication module and described first voltage stabilizing
The outfan coupling of protection circuit, described first remote meter reading module couples with the outfan of described first mu balanced circuit, described
Second remote meter reading module couples with the outfan of described second mu balanced circuit, described control module and described second voltage-stabilizing protection
The outfan coupling of circuit.Described first communication module, described second communication module, described first remote meter reading module and described
Second remote meter reading module all couples with described control module.
The third aspect, the embodiment of the present invention also provides for a kind of electrical isolation method, and described method includes: described transformator is used
In the galvanomagnetic-effect of the multiple described secondary coil by the described primary coil of described transformator and described transformator by described
The input voltage regulation of external power source is multiple voltage signal, and each described voltage signal is exported described load, so that
Described external power source is isolated with described load electrical.
The embodiment of the present invention provides the benefit that: coupled with the primary coil of transformator by external power source, transformator
Secondary coil is multiple, and each secondary coil of transformator all couples with outside load.
Transformator, will for being transmitted by the galvanomagnetic-effect of the secondary coil of the primary coil of transformator and transformator
The input voltage regulation of external power source is multiple voltage signal, and each voltage signal is all exported load.So that transformator
Primary coil and while the secondary coil of transformator bears voltage, electrical isolation between external power source and load.
Due to transformer coupled in circuit, the insulation material that the primary coil of transformator and the secondary coil of transformator are provided with
Material ensure that the dielectric strength between the primary coil of transformator and the secondary coil of transformator reaches 4KV, outside i.e. achieving
The electrical isolation of 4KV between portion's power supply and load.
Again owing to, in the multiple secondary coil of transformator, the insulant being provided with between each secondary coil ensure that secondary
Dielectric strength between coil and secondary coil reaches 4KV, i.e. achieve 4KV between secondary coil and secondary coil electric every
From.Each secondary coil all couples with load, and then also achieves the electrical isolation of 4KV between load and load.
The coupled structure of transformator is applied and is copied in communicator at multilist collection, and multilist collection copies communicator by transformator
Primary coil and the coupling of multiple secondary coil, and in multiple secondary coil, each secondary coil all copies communicator with multilist collection
In load coupling, thus realize outside input power and multilist collection copy and copy in communicator with multilist collection between communicator
The electrical isolation of 4KV electric pressure between each load, and then significantly improve multilist collection by electrical isolation and copy communicator
Safety during operation, reliability and stability.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by embodiment required use attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other relevant accompanying drawings.
Fig. 1 provides the module map of a kind of Switching Power Supply for the embodiment of the present invention；
Fig. 2 provides the circuit diagram of a kind of Switching Power Supply for the embodiment of the present invention；
Fig. 3 provides a kind of electrical isolation method being applied to this Switching Power Supply for the embodiment of the present invention；
Fig. 4 provides the multilist collection of a kind of this Switching Power Supply of application to copy the circuit diagram of communicator for the embodiment of the present invention.
In figure: Switching Power Supply 100, fairing 110, electromagnetic interference process circuit 111, current rectifying and wave filtering circuit 112, control
Circuit the 120, first mu balanced circuit the 130, second mu balanced circuit the 140, the 3rd mu balanced circuit the 150, first protective circuit of voltage regulation 160,
Second protective circuit of voltage regulation 170, feedback circuit 180, multilist collection copy communicator 200, control module 210, first communication module
220, first optocoupler device the 230, first remote meter reading module the 240, second optocoupler device the 250, second remote meter reading module 260.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Generally implement with the present invention illustrated described in accompanying drawing herein
The assembly of example can be arranged with various different configurations and design.
Therefore, detailed description to the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed below
The scope of the present invention, but be merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into the model of present invention protection
Enclose.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.In description of the invention
In, term " first ", " second ", " the 3rd " etc. are only used for distinguishing and describe, and it is not intended that indicate or hint relative importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " arrange ",
" connect ", " coupling " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or connect integratedly
Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Refer to Switching Power Supply 100 module map that Fig. 1, Fig. 1 show that the embodiment of the present invention provides.Switching Power Supply 100 is wrapped
Include: fairing 110, transformator T1, control circuit the 120, first mu balanced circuit the 130, second mu balanced circuit the 140, the 3rd voltage stabilizing
Circuit the 150, first protective circuit of voltage regulation the 160, second protective circuit of voltage regulation 170 and feedback circuit 180.
Refer to the circuit diagram of the Switching Power Supply 100 that Fig. 2, Fig. 2 show that the embodiment of the present invention provides.Fairing 110
For the power supply that external power input mouth AA ' inputs being carried out elimination electromagnetic interference and rectification.Will outward by fairing 110
The AC rectification of portion's power supply input is unidirectional current the primary coil of input tranformer T1.Preferably, fairing 110 wraps
Include: electromagnetic interference processes circuit 111 and current rectifying and wave filtering circuit 112.Electromagnetic interference processes input and the external power source of circuit 111
Input port AA ' couples, and electromagnetic interference processes the outfan of circuit 111 and couples with the input of current rectifying and wave filtering circuit 112.By
In the ac high voltage source that port AA ' inputs, ac high voltage source exists electromagnetic interference, and then equipment is interfered.Electricity
Magnetic disturbance processes circuit 111 and can be used in the electromagnetic interference filtering of the external power source by input, thus avoids and do equipment
Disturb.Meanwhile, electromagnetic interference processes the interference target signal filter that Switching Power Supply 100 self also can be produced by circuit 111, to prevent
The interference signal that Switching Power Supply 100 self produces is flowed into electrical network, and the operation to other equipment of electrical network interferes.Optional
, this enforcement can use EMC (Electro Magnetic Compatibility) to process circuit by filtering and the side of shielding
The electromagnetic interference that formula exists with the external power source eliminating input.Current rectifying and wave filtering circuit 112 is by processing circuit 111 with electromagnetic interference
Coupling, current rectifying and wave filtering circuit 112 is able to receive that electromagnetic interference processes the signal of telecommunication after circuit 111 processes.Current rectifying and wave filtering circuit
The 112 former sidelines being output to transformator T1 after the AC signal of input is converted to direct current by rectification and filtering
Circle.
The galvanomagnetic-effect of the secondary coil that transformator T1 is used for the primary coil by transformator T1 and transformator T1 will outward
The input voltage regulation of portion's power supply is voltage signal.Preferably, the primary coil of transformator T1 can be: primary coil aa '.The
The secondary coil of one transformator T1 includes: the first secondary coil bb ', the second secondary coil cc ', the 3rd secondary coil dd ' and
Four secondary coil ee '.Being provided with protection circuit between primary coil aa ', protection circuit includes: the first electric capacity C1, the first resistance R1
With the first diode D1.The input of primary coil aa ' couples with the outfan of rectifying and wave-filtering 112 circuit, the first electric capacity C1's
One end of one end and the first resistance R1 all couples with the input of primary coil aa '.The other end of the first electric capacity C1 and the first electricity
The cathode terminal coupling of the other end all with the first diode D1 of resistance R1, the anode tap of the first diode D1 is with primary coil aa's '
Outfan couples.Optionally, the protection circuit of the present embodiment is RCD absorbing circuit.By the one-way conduction of the first diode D1,
And first electric capacity C1 energy storage thus to control circuit 120 formed protection.
Control circuit 120 may be used for the clearance-type conducting primary coil aa ' of transformator T1 and coupling of external power source, from
And the signal of the primary coil aa ' of the input tranformer T1 of external power source can be regulated.
Control circuit 120 includes: pulse control circuit 120 and switch module.Switch module is used for being turned on or off
Connection between primary coil aa ' and the reference voltage end of transformator T1, to change the primary coil aa ' two ends of transformator T1
Voltage.Preferably, switch module includes: the first contact, the second contact, the primary coil aa's ' of the first contact and transformator T1
One end couples, and the second contact couples with reference voltage end.
It addition, for the ease of the Signal-controlled switch module by pulse signal etc. with low and high level the first contact and
The break-make of the second contact and Guan Bi, this switch module also includes controlling end, and this control end is used for receiving the pulse signal of input, with
Control the first contact and the second conducting got an electric shock and disconnection.
Preferably, switch module can be: field effect transistor Q1.Owing to switch module includes: the first contact, the second contact and
Controlling end, thus field effect transistor Q1 grid can be to control end, the drain electrode of field effect transistor Q1 can be the first contact, field effect
The source electrode of pipe Q1 can be the second contact.
In the embodiment of the present invention, pulse control circuit 120 is for controlling the break-make of switch module, thus passes through pulse control
Circuit 120 processed controls switch module and carries out break-make, the direct current signal that just can be exported by current rectifying and wave filtering circuit 112 with certain frequency
Change into pulse signal.The pulse signal that the primary coil aa ' of transformator T1 inputs can make each secondary line of transformator T1
Circle all produces the voltage signal of same frequency by electromagnetic induction.Optionally, voltage signal can be blood pressure lowering pulse voltage, should
Blood pressure lowering pulse voltage can be exported by the secondary coil of transformator T1.
Preferably, pulse control circuit 120 includes: control chip U1, the second diode D2, the second resistance R2, the second electricity
Hold C2 and the 3rd electric capacity C3.
The outfan of primary coil aa ' couples with the drain electrode of field effect transistor Q1.The grid of field effect transistor Q1 and control chip
Output control terminal (PWM-OUT) coupling of U1, the source electrode of field effect transistor Q1 and one end coupling of the first secondary coil bb '.Due to
The source electrode of field effect transistor Q1 also with reference to hold and couple, thus one end of the first secondary coil bb ' is ground reference point.First
The anode coupling of the other end of secondary coil bb ' and the second diode D2, the negative electrode of the second diode D2 and the second resistance R2's
One end couples.The other end of the second resistance R2 and one end coupling of the second electric capacity C2, the other end of the second electric capacity C2 and field effect
Pipe Q1 source electrode couples.The other end of the power voltage terminal VDD and the second resistance R2 of control chip U1 couples to provide control chip
The running voltage of U1.The other end coupling of the output under-voltage protection end BR and the second electric capacity C2 of control chip U1.Control chip U1
Feedback voltage end FB and the 3rd electric capacity C3 one end coupling, the other end of the 3rd electric capacity C3 and the other end coupling of the second electric capacity C2
Close.
Coupled with the drain electrode of field effect transistor Q1 by the primary coil aa ' of transformator T1, and control chip U1 by with field
The grid coupling of effect pipe Q1, thus control chip U1 can control the break-make of field effect transistor Q1.Control chip U1 controlling filed is imitated
Pipe Q1 intermittence should turn on, thus the direct current signal of current rectifying and wave filtering circuit 112 output is cut to pulse signal.Primary coil
Aa ' can make primary coil aa ' produce alternating magnetic field by pulse signal such that it is able to makes the first secondary coil bb ' produce frequency
The first blood pressure lowering pulse voltage that rate is identical with pulse signal.The first blood pressure lowering pulse voltage that first secondary coil bb ' exports is passed through
Second diode D2, the second resistance R2 and the first rectification circuit of the second electric capacity C2 composition, by whole for this first blood pressure lowering pulse voltage
Stream is the first step-down voltage of direct current.And the first step-down voltage is by inputting the power voltage terminal VDD of control chip U1 to provide
The power supply of control chip U1.Optionally, in the present embodiment, by the second diode D2, the second resistance R2 and the second electric capacity C2 group
The first rectification circuit become can be half-wave rectifying circuit.
Primary coil aa ' can make primary coil aa ' produce alternating magnetic field by pulse signal such that it is able to makes the second pair
Circle cc ', the 3rd secondary coil dd ' and the 4th secondary coil ee ' produce induced voltage by electromagnetic induction in sideline.Optionally,
In the present embodiment, the voltage signal blood pressure lowering that Switching Power Supply 100 is inputted by transformator T1.Therefore, the second secondary coil cc ' can produce
The second blood pressure lowering pulse voltage that raw frequency is identical with pulse signal, the 3rd secondary coil dd ' can produce frequency and pulse signal
The 3rd identical blood pressure lowering pulse voltage, and the 4th secondary coil ee ' also is able to produce the 4th fall that frequency is identical with pulse signal
Pressure pulse voltage.170
The anode tap of the 3rd diode D3 and one end coupling of the 3rd secondary coil dd ', the cathode terminal of the 3rd diode D3
Couple with the input of the first mu balanced circuit 130.The second blood pressure lowering pulse voltage that second secondary coil cc ' produces passes through the three or two
Pole pipe D3 rectification is the second step-down voltage of direct current, and inputs the first mu balanced circuit 130.First mu balanced circuit 130 includes: the 4th
Electric capacity C4, the 3rd resistance R3, the first audion Q2, the first Zener diode D1 and the 5th electric capacity C5.One end of 4th electric capacity C4
Couple with the cathode terminal of the 3rd diode D3, the other end ground connection of the 4th electric capacity C4.One end of 3rd resistance R3 is respectively with the 3rd
The colelctor electrode coupling of the cathode terminal of diode D3 and the first audion Q2, the other end of the 3rd resistance R3 and the first audion Q2's
Base stage couples, the emitter stage of the first audion Q2 and the first remote meter reading interface B coupling.The anode tap of the first Zener diode D1
Ground connection, the cathode terminal of the first Zener diode D1 and the base stage coupling of the first audion Q2.One end of 5th electric capacity C5 is also with
One remote meter reading interface B coupling, the other end ground connection of the 5th electric capacity C5.By the second blood pressure lowering electricity after the 3rd diode D3 rectification
Pressure input the first mu balanced circuit 130.Coupled by the cathode terminal of the first Zener diode D1 and the base stage of the first audion Q2, from
And can be by adjusting the amplification of base stage, so that the first step-down voltage of input also can be stablized in the case of producing fluctuation
Rated value to adaptive external loading.By the first Zener diode D1 respectively with the 3rd resistance R3 also and the first audion Q2's
Series connection, reduces power produced by the 3rd resistance R3 dividing potential drop, thus effectively raises the delivery efficiency of circuit so that first
Remote meter reading interface B has more preferable load capacity.
3rd secondary coil dd ' including: the first sub-secondary coil dd ', the second sub-secondary coil fd ' and the 3rd sub-secondary line
Circle gd ', the first sub-secondary coil dd ', the second sub-secondary coil fd ' and the 3rd sub-secondary coil gd ' couple successively.3rd secondary
The 3rd blood pressure lowering pulse voltage that coil dd ' is produced by electromagnetic induction includes: the first sub-voltage of blood pressure lowering pulse, the second blood pressure lowering pulse
Sub-voltage and the 3rd sub-voltage of blood pressure lowering pulse.
One end coupling of the anode tap of the 4th diode D4 and the first sub-secondary coil dd ', the negative electrode of the 4th diode D4
The input coupling of end and the second mu balanced circuit 140.The first sub-voltage of blood pressure lowering pulse that first sub-secondary coil dd ' produces passes through
4th diode D4 rectification is the first sub-voltage of blood pressure lowering of direct current, and inputs the second mu balanced circuit 140.Second mu balanced circuit 140
Including: the 6th electric capacity C6, the 4th resistance R4, the second audion Q3, the second Zener diode D2 and the 7th electric capacity C7.6th electric capacity
One end of C6 and the cathode terminal coupling of the 4th diode D4, the other end ground connection of the 6th electric capacity C6.One end of 4th resistance R4 is divided
Do not couple with the cathode terminal of the 4th diode D4 and the colelctor electrode of the second audion Q3, the other end and the two or three of the 4th resistance R4
The base stage coupling of pole pipe Q3, the emitter stage of the second audion Q3 and the second remote meter reading interface C coupling.Second Zener diode D2
Anode tap ground connection, the base stage coupling of the cathode terminal of the second Zener diode D2 and the second audion Q3.The one of 7th electric capacity C7
End also couples with the second remote meter reading interface C, the other end ground connection of the 7th electric capacity C7.By after the 4th diode D4 rectification
The one sub-voltage of blood pressure lowering pulse inputs the second mu balanced circuit 140.By cathode terminal and second audion of the second Zener diode D2
The base stage coupling of Q3, such that it is able to by the amplification adjusting base stage, so that the first sub-voltage of blood pressure lowering of input is producing ripple
Also the rated value of adaptive external loading can be stabilized in the case of Dong.By the second Zener diode D2 and the 4th resistance R4 and
The series connection of two audion Q3, reduces power produced by the 4th resistance R4 dividing potential drop, thus is effectively increased the effect of circuit output
Rate so that the second remote meter reading interface C also has more preferable load capacity.
As a kind of mode, in embodiments of the present invention, due to the load of the first remote meter reading interface B coupling and second remote
The loadtype of journey meter reading interface C coupling is identical, the first mu balanced circuit 130 and circuit structure of the second mu balanced circuit 140 then
Can be identical.
One end coupling of the anode tap of the 5th diode D5 and the second sub-secondary coil fd ', the negative electrode of the 5th diode D5
End and the first protective circuit of voltage regulation 160 input coupling, the two ends of the 8th electric capacity C8 all with the first protective circuit of voltage regulation 160
Input couples.The second sub-voltage of blood pressure lowering pulse that second sub-secondary coil fd ' produces is straight by the 5th diode D5 rectification
The second sub-voltage of blood pressure lowering of stream, the second sub-voltage of blood pressure lowering is by inputting the first protective circuit of voltage regulation after the filtering of the 8th electric capacity C8
160.First protective circuit of voltage regulation 160 carries out voltage stabilizing by the voltage stabilizing chip of himself to the second sub-voltage of blood pressure lowering of input.The
The voltage stabilizing chip of one protective circuit of voltage regulation 160 self also has protective effect, thus circuit can be formed protection.By first
The second sub-voltage of blood pressure lowering after protective circuit of voltage regulation 160 voltage stabilizing is again by the filtering of the 9th electric capacity C9, thus leads to by second
Letter interface D exports the load of outside.
The anode tap of the 6th diode D6 and one end coupling of the 3rd sub-secondary coil gd ', the negative electrode of the 6th diode D6
End and the second protective circuit of voltage regulation 170 input coupling, the two ends of the tenth electric capacity C10 all with the second protective circuit of voltage regulation 170
Input coupling.The 3rd sub-voltage of blood pressure lowering pulse that 3rd sub-secondary coil gd ' produces by the 6th diode D6 rectification is
The 3rd sub-voltage of blood pressure lowering of direct current, the 3rd sub-voltage of blood pressure lowering is by inputting the second voltage-stabilizing protection electricity after the filtering of the tenth electric capacity C10
Road 170.Second protective circuit of voltage regulation 170 carries out voltage stabilizing by the voltage stabilizing chip of himself to the 3rd sub-voltage of blood pressure lowering of input.
The voltage stabilizing chip of the second protective circuit of voltage regulation 170 self also has protective effect, thus circuit can be formed protection.Pass through
The 3rd sub-voltage of blood pressure lowering after second protective circuit of voltage regulation 170 voltage stabilizing is again by the filtering of the 11st electric capacity C11, thus passes through
Control module interface E exports the load of outside.It should be understood that control interface can think control module interface E.
In the present embodiment, the 4th secondary coil ee ' also couples with the primary coil aa ' of transformator T1, and then fourth officer
Sideline circle ee ' can produce the 4th blood pressure lowering pulse voltage by electromagnetic induction.The anode tap of the 7th diode D7 and the 4th secondary
Coil ee ' couples, the cathode terminal of the 7th diode D7 and the input coupling of the 3rd mu balanced circuit 150, the 12nd electric capacity C12's
Two ends all inputs with the 3rd mu balanced circuit 150 couple.4th blood pressure lowering pulse voltage by the rectification of the 7th diode D7 is
4th step-down voltage of direct current, after the 4th step-down voltage is by the filtering with 12 electric capacity C12, just can input the 3rd voltage stabilizing electricity
Road 150.3rd mu balanced circuit 150 is for carrying out voltage stabilizing by the voltage stabilizing of self by input the 4th step-down voltage.Due to, the 13rd
The two ends of electric capacity C13 all couple with the 3rd mu balanced circuit 150, thus the 4th blood pressure lowering of output after the 3rd mu balanced circuit 150 voltage stabilizing
Voltage is again by the filtering of the 13rd electric capacity C13, and then exports external loading by the first communication interface F.
For adjustable stability during guarantee circuit work, Switching Power Supply 100 includes: feedback circuit 180.Feedback circuit 180
Including: the 3rd Zener diode D3, the 5th resistance R5, the 6th resistance R6 and the first photoelectrical coupler OC1.3rd Zener diode
The cathode terminal of D3 is provided with interface G, the cathode terminal coupling of interface G and the 4th diode D4, the anode tap of the 3rd Zener diode D3
Couple with one end of the 5th resistance R5.The other end of the 5th resistance R5 and one end coupling of the 6th resistance R6, the 6th resistance R6's
Other end ground connection.First photoelectrical coupler OC1 includes: the first light emitting diode D1 and the first phototriode Q1.First is luminous
The anode tap of diode D1 and the coupling of the 6th resistance R6 one end, the cathode terminal of the first light emitting diode D1 and the 6th resistance R6 another
End coupling.The colelctor electrode of the first phototriode Q1 and one end coupling of the 3rd electric capacity, the emitter stage of the first phototriode Q1
Couple with the other end of the 3rd electric capacity.Through the filtered first blood pressure lowering electricity of the 4th diode D4 rectification and the 4th electric capacity C4
Pressure is by inputting the first light emitting diode D1 after the voltage stabilizing of the 3rd Zener diode D3 and the dividing potential drop of the 5th resistance R5.First is luminous
The signal of telecommunication of input is converted to optical signal by luminescence by diode D1, and optionally, the first light emitting diode D1 can be infrared
Light emitting diode.First phototriode Q1 is by receiving the optical signal that the first light emitting diode D1 sends, thus is believed by light again
The feedback voltage end FB of control chip U1 is inputted after number being converted to the signal of telecommunication.Control chip U1 is according to the size of the signal of telecommunication of feedback
Just can control the make-and-break time of field effect transistor Q1, thus control by controlling the pulse signal frequency of input primary coil aa '
Primary coil aa ' produces alternating magnetic field, and then can control the first secondary coil bb ', the second secondary coil cc ', the 3rd pair respectively
Sideline circle dd ' and the 4th secondary coil ee ' all reaches stable output.
In embodiments of the present invention, the dielectric strength between transformator T1 primary coil aa ' and multiple secondary coil reaches
4KV such that it is able to realize all having reached between external power source and each load the electric of 4KV electric pressure by transformator T1
Isolation.Being multiple due to secondary coil again, each secondary coil all individually couples with primary coil aa ', and primary coil aa ' and
The insulant of multiple secondary coils is the most identical.Thus, the first secondary coil bb ', the second secondary coil cc ', the 3rd secondary line
Circle dd ' and the 4th secondary coil ee ' also is able to reach the electrical isolation of 4KV electric pressure each other.Each secondary coil institute
Coupling a road all with outside load couple, thus each load the most also reached 4KV electric pressure electric every
From.
Therefore, in the Switching Power Supply 100 of the present embodiment, Switching Power Supply 100 can be provided with many by transformator T1
Individual secondary coil and realize loading the electrical isolation of 4KV between load and between load and external power source.
Refer to the flow chart of a kind of electrical isolation method that Fig. 3, Fig. 3 show that the embodiment of the present invention provides.Described side
Method includes: step S100.
Step S100: multiple for by the described primary coil of described transformator and described transformator of described transformator
The input voltage regulation of described external power source is multiple voltage signal by the galvanomagnetic-effect of described secondary coil, and by each described
Voltage signal exports load, so that described external power source is isolated with described load electrical.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, and the method for foregoing description
Specific works process, the corresponding process being referred in aforementioned means, do not repeat them here.
Refer to Fig. 4, Fig. 4 and show that the embodiment of the present invention provides a kind of multilist collection to copy the circuit diagram of communicator 200.On
The Switching Power Supply 100 stated is applied to this multilist collection and copies communicator 200.Multilist collection is copied communicator 200 and is included: Switching Power Supply
100, communication module and control module 210.Communication module includes: first communication module the 220, first remote meter reading module 240,
Two remote meter reading modules 260 and second communication module 280.
One end of control module 210 couples with control module interface E, by the first communication interface F output the 3rd blood pressure lowering
Voltage, to provide the running voltage of control module 210.In the present embodiment, control module interface E is the first communication interface.First
Communication module the 220, first remote meter reading module the 240, second remote meter reading module 260 and second communication module 280 all with control
Module 210 couples, thus just can be respectively to first communication module the 220, first remote meter reading module by control module 210
240, the second remote meter reading module 260 and second communication module 280 form effective control.
One end of first communication module 220 couples with the first communication interface F, by the first communication interface F output the 4th fall
Piezoelectricity pressure, to provide the running voltage of first communication module 220.The other end of first communication module 220 is filled by the first optocoupler
Put 230 to couple with control module 210.By the photoelectricity transmission effect of the first optocoupler device 230, it is achieved thereby that the first communication mould
While can forming data interaction between block 220 and control module 210, between first communication module 220 and control module 210 also
Achieve electrical isolation, safety during to ensure that first communication module 220 runs and stable.As a kind of mode, the first communication
Module 220 can be used in carrying out energy information the short-range transmission within 1200 meters, and optionally, first communication module 220 is permissible
For RS-485 communication module.In the present embodiment, by the electrical isolation of transformator T1, so that RS-485 communication module and electrical network
Between and remaining module of copying in communicator 200 of RS-485 communication module and multilist collection reach 4KV electrical isolation.Thus have
Effect improves personnel and carries out safety during operation and maintenance by RS-485 communication module.
One end of first remote meter reading module 240 couples with the first remote meter reading interface B, by the first remote meter reading interface
B exports the second step-down voltage, to provide the running voltage of the first remote meter reading module 240.First remote meter reading module 240 another
One end is coupled with control module 210 by the second optocoupler device 250.By the photoelectricity transmission effect of the second optocoupler device 250, from
And while achieving and can forming data interaction between the first remote meter reading module 240 and control module 210, the first remote meter reading
Electrical isolation is also achieved, to ensure peace when the first remote meter reading module 240 is run between module 240 and control module 210
Complete and stable.As a kind of mode, the first remote meter reading module 240 can be used in collecting water energy, gas energy and heat energy information
Copying and transmit, optionally, the first remote meter reading module 240 can be the first Mbus communication module.In the present embodiment, by becoming
The electrical isolation of depressor T1, so that between a Mbus communication module and electrical network and a Mbus communication module is copied logical with multilist collection
Remaining module in T unit 200 reaches 4KV electrical isolation.
In the present embodiment, one end of the second remote meter reading module 260 couples with the second remote meter reading interface C, by
Two remote meter reading interface C export the first sub-voltage of blood pressure lowering, to provide the running voltage of the second remote meter reading module 260.Second is remote
The other end of journey meter-reading module 260 couples with control module 210.It is achieved thereby that the second remote meter reading module 260 and control mould
Data interaction can be formed between block 210.As a kind of mode, the second remote meter reading module 260 can be used in by water energy, gas energy and
Heat energy information carries out collection and copies and transmit, and optionally, the second remote meter reading module 260 can be the second Mbus communication module.At this
In embodiment, by the electrical isolation of transformator T1 so that reach between the 2nd Mbus communication module and electrical network 4KV electrically every
From.
It should be noted that in the present embodiment, two-way Mbus communication module is identical circuit structure.Two-way Mbus leads to
After letter module couples with transformator T1 respectively, when wherein a road Mbus communication module breaks down, another road can't be affected
The normal work of Mbus communication module, thus be effectively increased multilist collection and copy the stability of communicator 200 work.
Second communication module 280 couples with the second communication interface D, exports the second blood pressure lowering electricity by the second communication interface D
Pressure, to provide the running voltage of second communication module 280.The other end of second communication module 280 couples with control module 210.
Achieve and data interaction between second communication module 280 and control module 210, can be formed.Second communication module 280 can be used in
By the way of wireless or carrier wave, carry out remote transmission after being copied by energy information collection such that it is able to with first communication module 220
Different transmission means and first communication module 220 form the cooperation in data transmission, and then are effectively increased multilist collection and copy logical
The stability of T unit 200 work and reliability.
In sum, the invention provides a kind of switching voltage and apply the multilist collection of this Switching Power Supply 100 to copy communication dress
Putting 200, coupled by the primary coil of external power source with transformator T1, the secondary coil of transformator T1 is multiple, and transformator
Each secondary coil of T1 all couples with outside load.
The galvanomagnetic-effect of the secondary coil that transformator T1 is used for the primary coil by transformator and transformator is transmitted,
It is multiple voltage signal by the input voltage regulation of external power source, and each voltage signal is all exported load.So that transformation
While the primary coil of device T1 and the secondary coil of transformator T1 bear voltage, electrical isolation between external power source and load.
The primary coil of transformator T1 in communicator 200 and transformator T1 is copied owing to transformator T1 is coupling in multilist collection
It is exhausted that the insulant that secondary coil is provided with ensure that between the primary coil of transformator T1 and the secondary coil of transformator T1
Edge intensity reaches 4KV, i.e. achieves external power source and the electrical isolation of 4KV between the load in communicator 200 copied by multilist collection.
Again owing to, in multiple secondary coils of transformator T1, the insulant being provided with between each secondary coil ensure that
Dielectric strength between secondary coil and secondary coil reaches 4KV, i.e. achieves the electricity of 4KV between secondary coil and secondary coil
Air bound from.The load that each secondary coil is all copied with multilist collection in communicator 200 couples, and then also achieves multilist collection
Copy the electrical isolation of 4KV between the load in communicator 200 and load.
The load all copied in communicator 200 with multilist collection due to secondary coil each in multiple secondary coils couples, from
And realize outside input power and multilist collection copy and between communicator 200, copy each load in communicator 200 with multilist collection
Between the electrical isolation of 4KV electric pressure, and then by electrical isolation significantly improve multilist collection copy communicator 200 run time
Safety, reliability and stability.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a Switching Power Supply, it is characterised in that including: control circuit and transformator；External power source is former with described transformator
Sideline circle coupling, the described primary coil of described transformator couples with described control circuit, and the secondary coil of described transformator is
Multiple, each described secondary coil of described transformator all couples with the described primary coil of described transformator；Described transformator
Each described secondary coil the most all couple with outside load；
Described control circuit turns on the described primary coil of described transformator and coupling of described external power source for clearance-type, with
Regulate the signal of described external power source input；
Described transformator is used for the described primary coil by described transformator and the multiple described secondary coil of described transformator
Galvanomagnetic-effect be multiple voltage signal by the input voltage regulation of described external power source, and by each described voltage signal export
To described load, so that described external power source is isolated with described load electrical.
Switching Power Supply the most according to claim 1, it is characterised in that the multiple described secondary coil bag of described transformator
Include: the first secondary coil, the second secondary coil and the 3rd secondary coil；Described first secondary coil and described control circuit coupling
Close, described second secondary coil and the coupling of the first remote meter reading interface, described 3rd secondary coil and the second remote meter reading interface
Coupling.
Switching Power Supply the most according to claim 2, it is characterised in that the multiple described secondary coil of described transformator also wraps
Include: the 4th secondary coil, described 4th secondary coil and the coupling of the first communication interface.
Switching Power Supply the most according to claim 2, it is characterised in that described 3rd secondary coil includes: the first sub-secondary
Coil, the second sub-secondary coil and the 3rd sub-secondary coil；Described first sub-secondary coil, described second sub-secondary coil and institute
State the 3rd sub-secondary coil to couple successively；Described first sub-secondary coil couples with described second remote meter reading interface, and described
Two sub-secondary coils couple with the second communication interface for carrier wave and radio communication, and described 3rd sub-secondary coil connects with control
Mouth coupling.
Switching Power Supply the most according to claim 4, it is characterised in that described Switching Power Supply includes: the first mu balanced circuit,
Two mu balanced circuits and the 3rd mu balanced circuit, the input of described first mu balanced circuit couples with described second secondary coil, described
The outfan of the first mu balanced circuit couples with described first remote meter reading interface；The input of described second mu balanced circuit is with described
3rd sub-secondary coil coupling, the outfan of described second mu balanced circuit couples with described second remote meter reading interface；Described
The input of three mu balanced circuits couples with described 4th secondary coil, and the outfan of described 3rd mu balanced circuit is also with described first
Communication interface couples.
Switching Power Supply the most according to claim 5, it is characterised in that described Switching Power Supply also includes: the first voltage-stabilizing protection
Circuit and the second protective circuit of voltage regulation, the input of described first protective circuit of voltage regulation couples with described second sub-secondary coil,
The outfan of described first protective circuit of voltage regulation couples with described second communication interface；The input of described second protective circuit of voltage regulation
End couples with described 3rd sub-secondary coil, and the outfan of described second protective circuit of voltage regulation also couples with described control interface.
Switching Power Supply the most according to claim 5, it is characterised in that described Switching Power Supply also includes feedback circuit, institute
Stating feedback circuit input to couple with the input of described second mu balanced circuit, described feedback circuit output controls electricity with described
The input coupling on road.
Switching Power Supply the most according to claim 7, it is characterised in that described feedback circuit includes: the first photoelectrical coupler,
Described first photoelectrical coupler includes: the first light emitting diode and the first phototriode, the two of described first light emitting diode
End all inputs with described second mu balanced circuit couple, the colelctor electrode of described first phototriode and described control circuit
Input couples.
9. communicator copied by a multilist collection, it is characterised in that including: communication module, control module and such as claim 1-8
Switching Power Supply described in any one；Described communication module includes: first communication module, lead to for the second of carrier wave and radio communication
Letter module, the first remote meter reading module and the second remote meter reading module；Described first communication module and described 3rd mu balanced circuit
Outfan coupling, described second communication module couples with the outfan of described first protective circuit of voltage regulation, described first long-range
Meter-reading module couples with the outfan of described first mu balanced circuit, described second remote meter reading module and described second mu balanced circuit
Outfan coupling, described control module couples with the outfan of described second protective circuit of voltage regulation；Described first communication module,
Described second communication module, described first remote meter reading module and described second remote meter reading module all with described control module coupling
Close.
10. an electrical isolation method, it is characterised in that be applied to the Switching Power Supply as described in any one of claim 1-8, institute
The method of stating includes:
Described transformator is used for the described primary coil by described transformator and the multiple described secondary coil of described transformator
Galvanomagnetic-effect be multiple voltage signal by the input voltage regulation of described external power source, and by each described voltage signal export
To load, so that described external power source is isolated with described load electrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610699671.0A CN106130370A (en) | 2016-08-22 | 2016-08-22 | Communicator copied by Switching Power Supply and electrical isolation method, multilist collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610699671.0A CN106130370A (en) | 2016-08-22 | 2016-08-22 | Communicator copied by Switching Power Supply and electrical isolation method, multilist collection |
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| CN106130370A true CN106130370A (en) | 2016-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610699671.0A Pending CN106130370A (en) | 2016-08-22 | 2016-08-22 | Communicator copied by Switching Power Supply and electrical isolation method, multilist collection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683371A (en) * | 2016-11-23 | 2017-05-17 | 南京新联电子股份有限公司 | Electricity, water, gas and heat four-meter-into-one meter reading interface converter |
| CN108173432A (en) * | 2017-12-29 | 2018-06-15 | 珠海格力智能装备技术研究院有限公司 | Switching power circuit and industrial gateway system |
| CN108199821A (en) * | 2017-09-27 | 2018-06-22 | 青岛鼎信通讯股份有限公司 | A kind of magnetic coupling half duplex communication integrated circuit of band isolation power supply |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120170319A1 (en) * | 2010-12-31 | 2012-07-05 | Michael Singaliese | Apparatus and method for converting a low AC voltage to a high DC voltage |
| CN202840961U (en) * | 2012-10-23 | 2013-03-27 | 成都讯易达通信设备有限公司 | Electricity meter switching power supply |
| CN103199710A (en) * | 2013-04-01 | 2013-07-10 | 上海师范大学 | Low-power consumption standby switching power source |
| CN203882436U (en) * | 2014-04-09 | 2014-10-15 | 北京黑蚂蚁节能技术有限公司 | Centralized meter reader |
-
2016
- 2016-08-22 CN CN201610699671.0A patent/CN106130370A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120170319A1 (en) * | 2010-12-31 | 2012-07-05 | Michael Singaliese | Apparatus and method for converting a low AC voltage to a high DC voltage |
| CN202840961U (en) * | 2012-10-23 | 2013-03-27 | 成都讯易达通信设备有限公司 | Electricity meter switching power supply |
| CN103199710A (en) * | 2013-04-01 | 2013-07-10 | 上海师范大学 | Low-power consumption standby switching power source |
| CN203882436U (en) * | 2014-04-09 | 2014-10-15 | 北京黑蚂蚁节能技术有限公司 | Centralized meter reader |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683371A (en) * | 2016-11-23 | 2017-05-17 | 南京新联电子股份有限公司 | Electricity, water, gas and heat four-meter-into-one meter reading interface converter |
| CN108199821A (en) * | 2017-09-27 | 2018-06-22 | 青岛鼎信通讯股份有限公司 | A kind of magnetic coupling half duplex communication integrated circuit of band isolation power supply |
| CN108173432A (en) * | 2017-12-29 | 2018-06-15 | 珠海格力智能装备技术研究院有限公司 | Switching power circuit and industrial gateway system |
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