CN202364139U - Power circuit of electric energy meter - Google Patents
Power circuit of electric energy meter Download PDFInfo
- Publication number
- CN202364139U CN202364139U CN2011204646753U CN201120464675U CN202364139U CN 202364139 U CN202364139 U CN 202364139U CN 2011204646753 U CN2011204646753 U CN 2011204646753U CN 201120464675 U CN201120464675 U CN 201120464675U CN 202364139 U CN202364139 U CN 202364139U
- Authority
- CN
- China
- Prior art keywords
- module
- switch power
- electric energy
- common mode
- energy meter
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The utility model discloses a power circuit of an electric energy meter, which comprises an interference suppression module (1), a common mode choke (2), a rectifying module (3), a filtering capacitor (5) and a switch power module (4), wherein the output end of the interference suppression module (1) is connected with the input end of the common mode choke (2), and the output end of the common mode choke (2) is connected with the input end of the rectifying module (3); the output end of the rectifying module (3) is connected with the input end of the switch power module (4); and the filtering capacitor (5) is connected between two lead wires in parallel, and the two lead wires are connected with the rectifying module (3) and the switch power module (4). The power circuit is characterized in that an overvoltage protection tube (6) is also connected with the two lead wires connected the rectifying module (3) and the switch power module (4), in parallel. The power circuit of the electric energy meter, disclosed by the utility model, can enable voltage input into the switch power module to be keep constant, thereby protecting the switch power module from being burnt and further ensuring normal use of the electric energy meter.
Description
Technical field
The utility model relates to the electric energy meter technical field, specifically is a kind of power circuit of electric energy meter.
Background technology
The effect of the power circuit of electric energy meter is that the three-phase alternating current that voltage is higher converts the lower powered by direct current of voltage to and can show to use.The power circuit of the electric energy meter of prior art comprises that interference suppresses module, common mode choke, rectification module, filter capacitor, switch power module; Disturb the output that suppresses module to link to each other with the input of common mode choke; The output of common mode choke links to each other with the input of rectification module; The output of rectification module links to each other with the input of switch power module, and filter capacitor is connected in parallel between two leads that rectification module and switch power module link to each other.The subject matter that the power circuit of this structure exists is that the voltage of input switch power module is stable inadequately, can occur burning out because of overtension the situation of switch power module once in a while, finally influences the use of whole electric energy.
The utility model content
It is stable that the technical problem that the utility model will solve provides a kind of voltage of input switch power module, thereby can avoid influencing because of burning out of switch power module the power circuit of the use of whole electric energy.
In order to achieve the above object; The technical scheme that the utility model provides is: a kind of power circuit of electric energy meter; Comprise disturbing and suppress module, common mode choke, rectification module, filter capacitor, switch power module; Disturb the output that suppresses module to link to each other with the input of common mode choke, the output of common mode choke links to each other with the input of rectification module, and the output of rectification module links to each other with the input of switch power module; Filter capacitor is connected in parallel between two leads that rectification module and switch power module link to each other, and also is parallel with the overvoltage protection pipe between two leads that rectification module and switch power module link to each other.
As preferably, said overvoltage protection pipe is a Zener diode.
After adopting technique scheme; The utility model compared with prior art; Have the following advantages: the power circuit of the utility model electric energy meter is parallel with the overvoltage protection pipe between two leads that rectification module and switch power module link to each other, and when the voltage between these two leads arrived certain value, it is constant that the voltage at the two ends of overvoltage protection pipe keeps; The voltage that is to say the input switch power module keeps constant; And this constant voltage remains under the critical voltage that can burn out switch power module, thereby the protection switch power module can not burnt out, and then guarantees the normal use of electric energy meter.
Description of drawings
Accompanying drawing is the schematic diagram of the power circuit of the utility model electric energy meter.
Shown in the figure, 1, disturb to suppress module 2, common mode choke 3, rectification module 4, switch power module 5, filter capacitor 6, overvoltage protection pipe.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.
Shown in accompanying drawing, a kind of power circuit of electric energy meter comprises disturbing and suppresses module 1, common mode choke 2, rectification module 3, filter capacitor 5, switch power module 4.Disturb the output that suppresses module 1 to link to each other with the input of common mode choke 2; The output of common mode choke 2 links to each other with the input of rectification module 3; The output of rectification module 3 links to each other with the input of switch power module 4; Filter capacitor 5 is connected in parallel between two leads that rectification module 3 and switch power module 4 link to each other, and also is parallel with overvoltage protection pipe 6 between two leads that rectification module 3 and switch power module 4 link to each other.Said overvoltage protection pipe 6 is a Zener diode.The specification of Zener diode will be decided according to the concrete parameter of switch power module 4, and the critical reverse breakdown voltage of the Zener diode of specifically being selected for use must be less than the critical voltage that can burn out switch power module 4.In the present embodiment, the model of the Zener diode of being selected for use is 1N5352.
The power circuit of the utility model electric energy meter is used for the three-phase alternating current that voltage is higher and converts the lower direct current of voltage to; The line of input power circuit has four the tunnel; Be respectively LA, LB, LC and LN; On behalf of A phase line, LB, LA represent B phase line, LC to represent C phase line, LN to represent the N phase line, and wherein A phase line, B phase line and C phase line are live wire, and the N phase line is a zero line.Said interference suppresses module 1 and comprises three piezo-resistances, three thermistors.Said A phase line links to each other with an end of first thermistor, and the other end of first thermistor links to each other with the first input end of common mode choke 2, parallelly connected first piezo-resistance and the first safety electric capacity between an end of first thermistor and the N phase line.Said B phase line links to each other with an end of second thermistor, and the other end of second thermistor links to each other with second input of common mode choke 2, parallelly connected second piezo-resistance and the second safety electric capacity between an end of second thermistor and the N phase line.Said C phase line links to each other with an end of the 3rd thermistor, and the other end of the 3rd thermistor links to each other with the 3rd input of common mode choke 2, parallelly connected the 3rd piezo-resistance and the 3rd safety electric capacity between an end of the 3rd thermistor and the N phase line.Said N phase line directly links to each other with the four-input terminal of common mode choke 2.Common mode choke 2 has four inputs, and four outputs are also arranged simultaneously.Said rectification circuit comprises first bridge rectifier, the arrangement of second bridge-type and the 3rd bridge rectifier of being made up of four diodes respectively.First output of common mode choke 2 links to each other with an input of first bridge rectifier; Second output of common mode choke 2 links to each other with an input of second bridge rectifier; The 3rd output of common mode choke 2 links to each other with an input of the 3rd bridge rectifier, and the 4th output of common mode choke 2 links to each other with another input of three bridge rectifiers respectively.Each bridge rectifier all has a cathode output end and a cathode output end; The cathode output end of three bridge rectifiers also connects the output of back as rectification module 3, and the cathode output end of three bridge rectifiers also connects back another output as rectification module 3.Said switch power module 4 is a prior art, and sell in the fair, and what selected for use in the present embodiment is that model is the switch power module of viper12a.Two output UT1 on the switch power module 4 and OUT2 directly are the electric energy meter power supply.
For ease of understanding such scheme, note VAR1 is first piezo-resistance, and VAR2 is second piezo-resistance; VAR3 is the 3rd piezo-resistance; RTC1 is first thermistor, and RTC2 is second thermistor, and RTC3 is the 3rd thermistor; Common mode choke 2 input from top to bottom is respectively first input end, second input, the 3rd input and four-input terminal, and film choke output from top to bottom is respectively first output, second output, the 3rd output and the 4th output altogether.Rectification module 3 once is designated as first bridge rectifier, second bridge rectifier and the 3rd bridge rectifier from top to bottom.
Above-described interference suppresses the interfering components that module 1 is used for absorbing input voltage; Common mode choke 2 is used for common mode electromagnetic interference on the filtering lead; Simultaneously can inhibition itself outwards not send electromagnetic interference yet; Avoid influencing the operate as normal of other electronic equipments under the same electromagnetic environment, rectification module 3 converts alternating current to jagged direct current, and filter capacitor 5 is used for the ripple of elimination rectifier output voltage; Overvoltage protection pipe 6 can prevent the overtension of exporting and damage electric energy meter that 4 of switch power modules are the effects of playing regulated output voltage.
The above desirable embodiment according to the utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must confirm its technical scope according to the claim scope.
Claims (2)
1. the power circuit of an electric energy meter comprises disturbing and suppresses module (1), common mode choke (2), rectification module (3), filter capacitor (5), switch power module (4); Disturb the output that suppresses module (1) to link to each other with the input of common mode choke (2); The output of common mode choke (2) links to each other with the input of rectification module (3); The output of rectification module (3) links to each other with the input of switch power module (4); Filter capacitor (5) is connected in parallel between two leads that rectification module (3) and switch power module (4) link to each other, and it is characterized in that: also be parallel with overvoltage protection pipe (6) between continuous two leads of rectification module (3) and switch power module (4).
2. the power circuit of electric energy meter according to claim 1, it is characterized in that: said overvoltage protection pipe (6) is a Zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204646753U CN202364139U (en) | 2011-11-22 | 2011-11-22 | Power circuit of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204646753U CN202364139U (en) | 2011-11-22 | 2011-11-22 | Power circuit of electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202364139U true CN202364139U (en) | 2012-08-01 |
Family
ID=46575294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204646753U Expired - Lifetime CN202364139U (en) | 2011-11-22 | 2011-11-22 | Power circuit of electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202364139U (en) |
-
2011
- 2011-11-22 CN CN2011204646753U patent/CN202364139U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2454216A (en) | Surge protector for a bridgeless boost converter | |
| CN107911038A (en) | Power-supply system based on over-and under-voltage design protection | |
| JP2013258898A (en) | Voltage rectifier | |
| CN103427410A (en) | Alternating-direct-current power source voltage stabilization protective circuit | |
| CN203951382U (en) | The inverter circuit of electric power secondary system driver module | |
| CN102291018B (en) | Single-phase rectifier with APFC (active power factor correction) circuit and alternating-current input voltage amplitude detection method thereof | |
| CN203813534U (en) | High-voltage capacitance electricity-taking device | |
| CN206432913U (en) | A kind of multi-output switch power source | |
| CN203481813U (en) | Alternating-direct-current power source voltage stabilization and protection circuit | |
| CN202550694U (en) | CT (current transformer) power taking circuit allowing for reducing heat of CT | |
| CN104319910A (en) | Power source energy taking circuit based on high-voltage power transmission line | |
| CN202364139U (en) | Power circuit of electric energy meter | |
| WO2016171575A1 (en) | Dc/dc/ac converter system | |
| CN103384119A (en) | Alternating current side energy-taking device and method for static var generator unit module | |
| CN202475239U (en) | Filtering protection circuit applied to double-feed converter control system power supply | |
| CN103701338A (en) | Universal stabilized voltage supply plug-in | |
| CN209198534U (en) | A kind of zero cross detection circuit and device | |
| CN208174537U (en) | A kind of regulated power supply management system of high reliablity | |
| JP2013211119A (en) | Led lighting device and luminaire using the same | |
| CN206908530U (en) | A kind of integral type emergency power supply inverter | |
| CN201796081U (en) | Operating cycles counter for over voltage protector | |
| CN201976016U (en) | Alternating-current and direct-current voltage-stabilizing power supply | |
| CN203872063U (en) | Seat power supply | |
| CN205792285U (en) | A kind of super wide range input power converting means under the conditions of strong jamming | |
| CN203788182U (en) | Three-phase inverter, single-phase inverter, three-phase rectifier and single-phase rectifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 315191 Yinzhou Industrial Park, Zhejiang, Ningbo, Yinzhou District, Ningbo Patentee after: NINGBO SANXING MEDICAL ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo Sanxing Electric Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |