CN108649803A - A kind of power supply circuit for M-BUS - Google Patents
A kind of power supply circuit for M-BUS Download PDFInfo
- Publication number
- CN108649803A CN108649803A CN201810572995.7A CN201810572995A CN108649803A CN 108649803 A CN108649803 A CN 108649803A CN 201810572995 A CN201810572995 A CN 201810572995A CN 108649803 A CN108649803 A CN 108649803A
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- Prior art keywords
- transformer
- output
- input
- bus
- power supply
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Classifications
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention proposes a kind of power supply circuit for M BUS.Its feature is to add low pressure difference linear voltage regulator (LDO) in Royer circuit front-ends, will external input voltage carry out voltage stabilizing after isolation output is carried out by Royer circuits again.Circuit of the present invention is simple, cost of implementation is low, because front end LDO stablizes Royer circuit input voltages in a definite value, therefore Royer circuit start electric currents are hardly influenced by external input voltage, it is terminated under high input voltage existing for the power supply plan of LDO after existing Royer circuits can effectively be solved, the larger problem of starting current, also therefore input current is small, the low feature of output power, and the present invention is highly suitable as micropower and needs the power supply circuit that the M BUS buses of voltage stabilizing power supply are isolated.
Description
Technical field
The present invention relates to the power supply circuit of M-BUS, more particularly to a kind of micropower of simple, low cost M-BUS every
From power supply.
Background technology：
M-BUS is a kind of bus design dedicated for public utilities instrument.M-BUS meter bus can meet by battery
The particular/special requirement of the measuring instrument of power supply or remote power feeding.When measuring instrument receives data sending request, by what is currently measured
For data transmission to main website, main website periodically reads the data of these measuring instruments transmission.Because M-BUS is almost only in terminal measuring instrument
It works at the time of device or counter transmission data, transfers data to master station, and M-BUS is in and " waits in most cases
Machine " state, therefore the work characteristics of the power supply circuit for M-BUS is mostly：1, operating power consumption is low, generally in milliwatt rank；2, defeated
It is small to enter electric current, and requires no-load power consumption extremely low, to reach energy-efficient target；3, it is to avoid M-BUS own signals interference effect whole
The accuracy for holding measuring instrument transmission data, generally requires input terminal to be isolated with output end；4, Width funtion input requirements can be met,
Input voltage caused by the reduction of input energy reduces when meeting long-term work, extends the M-BUS working times, input voltage
Range is generally 6-12V or so, and requires output voltage voltage stabilizing.
The particular/special requirement for power supply circuit and more existing common power source design according to M-BUS buses, it is found that mesh
The scheme of low pressure difference linear voltage regulator LDO voltage stabilizings is terminated after preceding common Royer circuits, because of input voltage and Royer circuits
In start-up circuit resistance R1 be connected directly, starting current can follow input voltage increase and increase, it is higher in input voltage
In the case of, input current is larger, circuit power consumption bigger, cannot be satisfied that M-BUS power supply circuit input currents are small, and no-load power consumption is low
It is required that easily causing more energy loss.
Invention content：
Have in view of that, the present invention proposes a kind of power supply circuit for M-BUS, can effectively solve the problem that M-BUS power supply circuits
The big problem of input current reduces circuit power consumption.
The invention is realized by the following technical scheme：
A kind of power supply circuit for M-BUS, it is characterised in that：Including low pressure difference linear voltage regulator, Royer circuits, filter
Wave capacitance C1A and filter capacitor C1B；The input terminal of low pressure difference linear voltage regulator connects input voltage, low pressure difference linear voltage regulator
Stable voltage Vo1 to the Royer circuits of output end output input terminal, the ground terminal connection of low pressure difference linear voltage regulator inputs
Ground；The output end output voltage Vo2 of Royer circuits powers for M-BUS terminals；Filter capacitor C1A is connected to input voltage and defeated
Between entering ground, filter capacitor C1B is connected between the output end of low pressure difference linear voltage regulator and input ground.
Preferably, the Royer circuits include triode TR1, triode TR2, transformer T1, diode D1, two poles
Pipe D2, capacitance C2, capacitance C3 and resistance R1；
One end of resistance R1 connects the output end of low pressure difference linear voltage regulator, capacitance C3 as the input terminal of Royer circuits
It is connected between the other end of resistance R1 and input ground；The Same Name of Ends connecting triode TR1's of the first primary side windings of transformer T1
Collector, the different name end of the first primary side windings of transformer T1 are connected to resistance R1 with the Same Name of Ends of the second primary side windings of transformer T1
One end, the collector of the different name end connecting triode TR2 of the second primary side winding of transformer T1；Triode TR1 and triode
The emitter of TR2 is connected, and tie point is connected to input ground；The base stage of triode TR1 connects transformer the second auxiliary windings of T1
Different name end, triode TR2 base stage connection transformer the first auxiliary windings of T1 Same Name of Ends；Transformer T1 first auxiliary around
The different name end of group and the Same Name of Ends of the second auxiliary winding are connected to the other end of resistance R1；The first vice-side winding of transformer it is of the same name
The anode of end connection diode D1, the anode of the different name end connection diode D2 of the second vice-side winding of transformer；Diode D1's
Cathode is connecting output with the cathode of diode D2 just；The different name end of first vice-side winding of transformer and the second vice-side winding it is same
The connection output of name end is negative, between capacitance C2 connections and output are just and output bears.
Working principle of the present invention is as follows：External input voltage (generally wide-voltage range 6-12V) is through LDO voltage stabilizings (one
As voltage stabilizing in 5V or so) after obtain voltage Vo1, using voltage Vo1 as the input voltage of rear end Royer circuits, voltage Vo1 passes through
Our required isolation output voltage Vo2, wherein Vo1, Vo2 and the Royer circuits transformation are obtained after the Royer circuits
Turn ratio N1, N2 of device T1 meets following relationship：
Since LDO, then no matter external power supply input voltage is how many, is added in Royer circuit front-ends in the present invention
The voltage of Royer circuits R1, C3 are always the output voltage Vo1 of LDO, and starting current will not follow input voltage to change,
It can effectively solve the problems, such as that original circuit arrangement input current in the case where inputting high voltage is larger, to effectively reduce circuit work(
Consumption.
In addition collection pipe in pairs can be used in described Royer circuit diodes D1, D2, can to improve the efficiency of Royer circuits
Further decrease the input power consumption of product；
Compared with prior art, the present invention has following remarkable result：
1, the input of Width funtion low current can be achieved at the same time in the present invention, and voltage stabilizing output is isolated in low-voltage micropower；It is very suitable
It is bus-powered to be combined into M-BUS；
2, present invention design is simple, realizes that easy and cost is relatively low；
3, the present invention terminates after can effectively solving existing Royer circuits under high input voltage existing for the power supply plan of LDO, opens
The larger problem of streaming current；
4, the present invention is because front end LDO is by Royer circuit input voltages stabilization in a definite value, therefore Royer circuits open
Streaming current is hardly influenced by external input voltage, and the power supply plan that can effectively solve termination LDO after existing Royer circuits is deposited
High input voltage under, the larger problem of starting current.High and low temperature environment also need to only consider triode amplification factor to starting electricity
The influence of stream, it is easier to do the debugging of Allowance Design and circuit parameter.
Description of the drawings：
Fig. 1 is M-BUS bus circuit theory schematic diagrams
Fig. 2 is the circuit diagram of termination LDO voltage stabilizings after existing Royer circuits；
Fig. 3 is the circuit diagram of application circuit of the present invention.
Specific implementation mode
First case study on implementation：
Fig. 3 shows the circuit diagram that the present invention applies.
A kind of power supply circuit for M-BUS, including low pressure difference linear voltage regulator LDO, Royer circuit, filter capacitor C1A
With filter capacitor C1B；The input terminal of low pressure difference linear voltage regulator LDO connects input voltage, the stable voltage Vo1 of output end output
To the input terminal of Royer circuits, ground terminal connection input ground；The output end output voltage Vo2 of Royer circuits is M-BUS terminals
Power supply, filter capacitor C1A are connected between input voltage and input ground, and filter capacitor C1B is connected to output end and the input of LDO
Between ground, C1A and C1B mainly play filtering.
The Royer circuits include triode TR1, TR2, transformer T1, diode D1, D2, capacitance C2, C3 and resistance
R1；One end of resistance R1 connects the output end of LDO as the input terminal of Royer circuits, and capacitance C3 is connected to the another of resistance R1
Between end and input ground；The collector of the Same Name of Ends connecting triode TR1 of the first primary side windings of transformer T1, transformer T1 first
The different name end of primary side winding and the Same Name of Ends of the second primary side windings of transformer T1 are connected to one end of resistance R1, and the of transformer T1
The collector of the different name end connecting triode TR2 of two primary side windings；Triode TR1 is connected with the emitter of triode TR2, and
Tie point is connected to input ground；The different name end of base stage connection transformer the second auxiliary windings of T1 of triode TR1, triode TR2's
Base stage connects the Same Name of Ends of transformer the first auxiliary windings of T1；The different name end of the first auxiliary winding of transformer T1 and the second auxiliary
The Same Name of Ends of winding is connected to the other end of resistance R1；The sun of the Same Name of Ends connection diode D1 of the first vice-side winding of transformer
Pole, the anode of the different name end connection diode D2 of the second vice-side winding of transformer；The moon of the cathode and diode D2 of diode D1
Pole connection output is just；The different name end of first vice-side winding of transformer connects output with the Same Name of Ends of the second vice-side winding and bears, electricity
Hold C2 connections and output just and output bear between.
The actual implementation case that the circuit diagram applied according to the present invention is realized can realize that following is that M-BUS is bus-powered
It is required that：
Input voltage：6-8VDC, output voltage：5VDC (isolation)；
Output current：1.5mA；Input current：No more than 2mA.
Actual test data such as following table：
By the achievable Width funtion low current input of the visible present invention of data above, voltage stabilizing output, power is isolated in micropower
Grade is only 7.5mW.
Above the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as to this hair
Bright limitation for those skilled in the art without departing from the spirit and scope of the present invention, can be with
Several improvements and modifications are made, for example, replacing the filter capacitor C1A and C1B in embodiment one with existing filter circuit, with now
Some regulator circuits replace the low pressure difference linear voltage regulator etc. in embodiment one, can also achieve the object of the present invention, these change
Protection scope of the present invention is also should be regarded as into retouching, protection scope of the present invention should be with claim limited range
It is accurate.
Claims (3)
1. a kind of power supply circuit for M-BUS, it is characterised in that：Including low pressure difference linear voltage regulator, Royer circuits, filtering
Capacitance C1A and filter capacitor C1B；The input terminal of low pressure difference linear voltage regulator connects input voltage, low pressure difference linear voltage regulator
The input terminal of stable voltage Vo1 to the Royer circuits of output end output, the ground terminal connection input of low pressure difference linear voltage regulator
Ground；The output end output voltage Vo2 of Royer circuits powers for M-BUS terminals；Filter capacitor C1A is connected to input voltage and defeated
Between entering ground, filter capacitor C1B is connected between the output end of low pressure difference linear voltage regulator and input ground.
2. the power supply circuit according to claim 1 for M-BUS, it is characterised in that：The Royer circuits include three
Grade pipe TR1, triode TR2, transformer T1, diode D1, diode D2, capacitance C2, capacitance C3 and resistance R1；
One end of resistance R1 connects the output end of low pressure difference linear voltage regulator, capacitance C3 connections as the input terminal of Royer circuits
Between the other end and input ground of resistance R1；The current collection of the Same Name of Ends connecting triode TR1 of the first primary side windings of transformer T1
Pole, the different name end of the first primary side windings of transformer T1 are connected to the one of resistance R1 with the Same Name of Ends of the second primary side windings of transformer T1
End, the collector of the different name end connecting triode TR2 of the second primary side winding of transformer T1；Triode TR1's and triode TR2
Emitter is connected, and tie point is connected to input ground；The different name of base stage connection transformer the second auxiliary windings of T1 of triode TR1
End, the Same Name of Ends of base stage connection transformer the first auxiliary windings of T1 of triode TR2；The first auxiliary winding of transformer T1 it is different
The Same Name of Ends of name end and the second auxiliary winding is connected to the other end of resistance R1；The Same Name of Ends of the first vice-side winding of transformer connects
The anode of diode D1, the anode of the different name end connection diode D2 of the second vice-side winding of transformer；The cathode of diode D1 and
The cathode connection output of diode D2 is just；The different name end of first vice-side winding of transformer and the Same Name of Ends of the second vice-side winding connect
It is negative to connect output, between capacitance C2 connections and output are just and output bears.
3. the power supply circuit according to claim 1 for M-BUS, it is characterised in that：The ratio between voltage Vo1 and voltage Vo2
Equal to the ratio between transformer T1 primary side windings and vice-side winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572995.7A CN108649803A (en) | 2018-06-06 | 2018-06-06 | A kind of power supply circuit for M-BUS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572995.7A CN108649803A (en) | 2018-06-06 | 2018-06-06 | A kind of power supply circuit for M-BUS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108649803A true CN108649803A (en) | 2018-10-12 |
Family
ID=63751848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810572995.7A Withdrawn CN108649803A (en) | 2018-06-06 | 2018-06-06 | A kind of power supply circuit for M-BUS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108649803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381610A (en) * | 2020-03-09 | 2021-09-10 | 北京烁科中科信电子装备有限公司 | High-voltage generating circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW456730U (en) * | 1999-11-09 | 2001-09-21 | Jeng Shing Jian | AC electronic stabilizer circuit of DC control switch |
| CN101599698A (en) * | 2009-05-19 | 2009-12-09 | 广州金升阳科技有限公司 | A kind of micro-power DC-DC power supply and manufacture method thereof |
| CN101867365A (en) * | 2010-04-28 | 2010-10-20 | 广州金升阳科技有限公司 | Circuit for converting direct-current positive and negative bipolar signal into unipolar signal through isolation |
| CN202095142U (en) * | 2011-05-31 | 2011-12-28 | 威力磁电子股份有限公司 | Lamp driving device |
| CN202189463U (en) * | 2011-09-15 | 2012-04-11 | 长沙威胜信息技术有限公司 | M-bus host of collector |
| CN208272860U (en) * | 2018-06-06 | 2018-12-21 | 广州金升阳科技有限公司 | A kind of power supply circuit for M-BUS |
-
2018
- 2018-06-06 CN CN201810572995.7A patent/CN108649803A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW456730U (en) * | 1999-11-09 | 2001-09-21 | Jeng Shing Jian | AC electronic stabilizer circuit of DC control switch |
| CN101599698A (en) * | 2009-05-19 | 2009-12-09 | 广州金升阳科技有限公司 | A kind of micro-power DC-DC power supply and manufacture method thereof |
| CN101867365A (en) * | 2010-04-28 | 2010-10-20 | 广州金升阳科技有限公司 | Circuit for converting direct-current positive and negative bipolar signal into unipolar signal through isolation |
| CN202095142U (en) * | 2011-05-31 | 2011-12-28 | 威力磁电子股份有限公司 | Lamp driving device |
| CN202189463U (en) * | 2011-09-15 | 2012-04-11 | 长沙威胜信息技术有限公司 | M-bus host of collector |
| CN208272860U (en) * | 2018-06-06 | 2018-12-21 | 广州金升阳科技有限公司 | A kind of power supply circuit for M-BUS |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381610A (en) * | 2020-03-09 | 2021-09-10 | 北京烁科中科信电子装备有限公司 | High-voltage generating circuit |
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Application publication date: 20181012 |