CN104578782A - Module special for carrier power source of electric energy meter - Google Patents
Module special for carrier power source of electric energy meter Download PDFInfo
- Publication number
- CN104578782A CN104578782A CN201510018953.5A CN201510018953A CN104578782A CN 104578782 A CN104578782 A CN 104578782A CN 201510018953 A CN201510018953 A CN 201510018953A CN 104578782 A CN104578782 A CN 104578782A
- Authority
- CN
- China
- Prior art keywords
- power source
- electric energy
- energy meter
- voltage
- carrier power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock
-
- 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
- H02H7/10—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 for converters; for rectifiers
- H02H7/12—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 for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—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 for converters; for rectifiers for static converters or rectifiers for DC-DC converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a module special for a carrier power source of an electric energy meter, belongs to carrier power source power supply devices in the electric instrument and meter industry and relates to the technical field of fundamental theory of electrical engineering, power electronics, electronic measurement and the like. The module special for the carrier power source of the electric energy meter solves the problems that an existing carrier power source is large in fluctuation when impacted by a power grid and effective transmission of carrier communication data is affected. The module special for the carrier power source of the electric energy meter is composed of a voltage conversion circuit and a short-circuit protection circuit, can achieve stable voltage output, and can provide large instantaneous current and low ripple waves. In case of short circuits, the power module can achieve a good protective function, prevents devices from being damaged, saves maintenance cost, and guarantees normal operation of communication of the electric energy meter.
Description
Technical field
The invention belongs to electrotechnical instrument and meter industry electric energy meter carrier power source electric supply installation, it relates to the technical fields such as Fundamental Theory of Electrical Engineering, power electronics, electronic measurements.
Background technology
At present, China's power line network construction is very perfect, power line is used to realize carrier communication, reinvestment is not needed to lay communication line, not only can to economize on the use of funds input, but also there is the few feature of maintenance, can realize flexibly " plug and play " as communication channel with low-voltage power line.Carrier wave is as the important communication mode of electric energy meter; in electrical network actual motion; often can be subject to the impact of Load on Electric Power Grid; cause the power supply fluctuation of carrier module larger; even can affect the transmission of carrier communication data, so ensure that the reliability of its power supply, fail safe and stability have great researching value.
Summary of the invention
The present invention is poor in order to solve intelligent electric meter carrier module power supply output stability, move excessive by electrical network shock wave, and carrier power source burns out components and parts when there is short circuit, affect the normal operation of carrier communication module, in order to adapt to the requirement of state's net to the external communication module of novel intelligent electric energy meter, provide a kind of electric energy meter carrier power source special module.
Electric energy meter carrier power source special module is made up of voltage conversion circuit and short-circuit protection circuit, and its structure is simple, dependable performance, is easy to application.The course of work is: input voltage obtains stable voltage by voltage conversion circuit and exports, and when output is short-circuited, short-circuit protection circuit work, short-circuit signal feeds back to voltage conversion circuit, plays the effect of protection power source and components and parts.
As shown in Figure 3, voltage conversion circuit is by PNP triode Q1, NPN triode Q2, and voltage-stabiliser tube D8 and resistance form a closed loop for circuit diagram, and maintain a stable voltage and export, wherein voltage-stabiliser tube plays pressure stabilization function, the output of triode control voltage.When output voltage raises accordingly higher than voltage stabilizing pin one, pin 2 voltage during stationary value, the electric current flowing through triode Q2 increases, and the collector current of Q1 reduces, and output voltage reduces; When output voltage is lower than stationary value, the collector current flowing through Q1 increases, and output voltage raises.By the resistance value that height and the selection of closed-loop adjustment output voltage are suitable for, obtain stable voltage and export.
Short-circuit protection circuit forms a feedback loop primarily of NPN triode Q3, voltage-stabiliser tube D6, D7, diode D9 and resistance capacitance.Wherein voltage-stabiliser tube is in short-circuit protection circuit, plays pressure limiting and protective effect; Triode plays the effect controlling change-over circuit triode break-make, reaches the object of the Non voltage output when short circuit occurs; Diode realizes the function of one-way conduction.
When output has short circuit to occur, triode Q3 conducting, makes the pin 2 i.e. base voltage of Q2 of voltage-stabiliser tube D8 reduce rapidly, and triode Q2, Q1 end, Non voltage output.Wherein diode realizes the object of one-way conduction, and voltage-stabiliser tube D6, D7 mainly limit voltage in short-circuit loop, and the object of protection components and parts.
Compared with prior art, main feature of the present invention is the outgoing carrier module required voltage that power module can be stable, provides the transient current of maximum 3A to export, and has the low ripple that peak-to-peak value is 8mv.When there is short-circuit conditions, electric energy meter carrier power source special module can play a very good protection, and avoids device failure, has saved maintenance cost, has ensured the normal operation of electric energy meter communication.
Accompanying drawing explanation
Fig. 1 is that electric energy meter carrier power source special module is powered block diagram; Fig. 2 is electric energy meter carrier power source special module theory diagram; Fig. 3 is electric energy meter carrier power source special module circuit diagram.
Embodiment
Electric energy meter carrier power source special module theory diagram as shown in Figure 2; input voltage obtains stable voltage by voltage conversion circuit and exports, when output is short-circuited, and short-circuit protection circuit work; short-circuit signal feeds back to voltage conversion circuit, plays the effect of protection power source and components and parts.
As shown in Figure 3, voltage conversion circuit is by triode Q1, Q2, and voltage-stabiliser tube D8 and resistor group become a closed loop for circuit embodiment.When output voltage raises accordingly higher than voltage stabilizing pin one, pin 2 voltage during stationary value, the electric current flowing through triode Q2 increases, and the collector current of Q1 reduces, and output voltage reduces; When output voltage is lower than stationary value, the collector current flowing through Q1 increases, and output voltage raises.By the resistance value that height and the selection of closed-loop adjustment output voltage are suitable for, obtain stable voltage and export.Short-circuit protection circuit forms a feedback loop primarily of triode Q3, voltage-stabiliser tube D6, D7, diode D9 and resistance capacitance; When output has short circuit to occur, triode Q3 conducting, makes the pin 2 i.e. base voltage of Q2 of voltage-stabiliser tube D8 reduce rapidly, and triode Q2, Q1 end, Non voltage output.Wherein diode realizes the object of one-way conduction, and voltage-stabiliser tube D6, D7 mainly limit voltage in short-circuit loop, and the object of protection components and parts.The requirement selecting suitable voltage stabilizing value just can meet input voltage to change within the specific limits.
Claims (3)
1. electric energy meter carrier power source special module, comprises voltage conversion circuit, short-circuit protection circuit.
2. electric energy meter carrier power source special module according to claim 1, is characterized in that, described change-over circuit is that voltage-stabiliser tube NCP431A and resistor group become a closed loop by PNP triode Q1, NPN triode Q2.
3. electric energy meter carrier power source special module according to claim 1, is characterized in that, described short-circuit protection circuit forms a feedback loop by NPN triode Q3,20 voltage-stabiliser tube D6,11V voltage-stabiliser tube D7, diode D9 and resistance capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018953.5A CN104578782A (en) | 2015-01-15 | 2015-01-15 | Module special for carrier power source of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018953.5A CN104578782A (en) | 2015-01-15 | 2015-01-15 | Module special for carrier power source of electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104578782A true CN104578782A (en) | 2015-04-29 |
Family
ID=53094174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510018953.5A Pending CN104578782A (en) | 2015-01-15 | 2015-01-15 | Module special for carrier power source of electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104578782A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917363A (en) * | 2015-05-04 | 2015-09-16 | 惠州三华工业有限公司 | Double-output power supply voltage stabilization protection circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202906729U (en) * | 2012-09-13 | 2013-04-24 | 陈仲平 | Low-power-consumption wide-voltage intelligent power meter source |
| CN203387159U (en) * | 2013-08-23 | 2014-01-08 | 惠州市德赛西威汽车电子有限公司 | Short circuit protection circuit of triode voltage stabilizing circuit |
| CN203445591U (en) * | 2013-08-20 | 2014-02-19 | 武汉盛帆电子股份有限公司 | Low power consumption high precision single-phase power supply module with overload protection |
| CN104049661A (en) * | 2013-03-15 | 2014-09-17 | 成都瑞途电子有限公司 | Automatic adjustment type voltage stabilizer |
-
2015
- 2015-01-15 CN CN201510018953.5A patent/CN104578782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202906729U (en) * | 2012-09-13 | 2013-04-24 | 陈仲平 | Low-power-consumption wide-voltage intelligent power meter source |
| CN104049661A (en) * | 2013-03-15 | 2014-09-17 | 成都瑞途电子有限公司 | Automatic adjustment type voltage stabilizer |
| CN203445591U (en) * | 2013-08-20 | 2014-02-19 | 武汉盛帆电子股份有限公司 | Low power consumption high precision single-phase power supply module with overload protection |
| CN203387159U (en) * | 2013-08-23 | 2014-01-08 | 惠州市德赛西威汽车电子有限公司 | Short circuit protection circuit of triode voltage stabilizing circuit |
Non-Patent Citations (2)
| Title |
|---|
| ON SEMICONDUCTOR: "《NPC431A,SC431A,NCP431B,NCP432B Series》", 30 April 2013 * |
| 戈素贞等: "《模拟电子技术基础与应用实例（第2版）》", 30 September 2012 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917363A (en) * | 2015-05-04 | 2015-09-16 | 惠州三华工业有限公司 | Double-output power supply voltage stabilization protection circuit |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |