CN112332636A - Guide rail meter with anti-strong magnetic isolation power supply - Google Patents
Guide rail meter with anti-strong magnetic isolation power supply Download PDFInfo
- Publication number
- CN112332636A CN112332636A CN202011078253.2A CN202011078253A CN112332636A CN 112332636 A CN112332636 A CN 112332636A CN 202011078253 A CN202011078253 A CN 202011078253A CN 112332636 A CN112332636 A CN 112332636A
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- CN
- China
- Prior art keywords
- power supply
- pcb
- circuit
- frequency transformer
- guide rail
- 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
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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
- H02M1/00—Details of apparatus for conversion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model provides a guide rail table with prevent strong magnetism isolation power, include the terminal cover, with terminal cover complex epitheca, locate the power supply circuit in the epitheca, be equipped with PCB power strip, PCB mainboard display mainboard in the epitheca, even there is relay connecting circuit board display mainboard below, PCB power strip is located relay connecting circuit board below and is equipped with and has resistance relay assembly, power supply circuit includes a plurality of switch circuit, a plurality of absorption circuit, and the fixed microprocessor that is equipped with on the PCB power strip, be equipped with the high frequency transformer who is connected with the microprocessor electricity on the PCB mainboard, microprocessor output 38KHz frequency and realize under high frequency transformer's effect that the power keeps apart and carry out the power supply of circuit. The design has the advantages of simple PCB design layout and low application cost.
Description
Technical Field
The invention relates to the field of isolated power supplies, in particular to a guide rail meter with a strong-magnetism-preventing isolated power supply.
Background
At present, due to market demands and other reasons, the size of some specially customized resistance-capacitance power supply guide rail meters is smaller and smaller, and meanwhile, strong and weak current isolation is not performed on a resistance-capacitance power supply, so that the whole circuit of the resistance-capacitance power supply is dangerous, for example, a common 485 circuit and a pulse output circuit need another group of power supplies to independently supply power to the circuits to achieve strong and weak current isolation. The PCB layout is an important component of the traditional switching power supply design, in the process of designing an isolation power supply according to the traditional switching power supply, a plurality of PCBs occupy large PCB area and size, and the special design requirements of the market cannot be met.
Disclosure of Invention
The invention aims to provide a guide rail meter with a strong-magnetism-proof isolation power supply, which has the advantages of simple PCB design layout and low application cost.
In order to solve the technical problems, the invention adopts the following technical scheme: a guide rail meter with a strong-magnetic isolation power supply comprises a terminal cover, an upper shell matched with the terminal cover and a power circuit arranged in the upper shell, wherein a PCB power supply board and a PCB mainboard display mainboard are arranged in the upper shell, a relay connecting circuit board is connected below the display mainboard, the PCB power supply board is positioned below the relay connecting circuit board and is provided with a resistance relay assembly, two terminal seats are arranged at the lower parts of two sides of the PCB power supply board, a plurality of zero line copper bars connected with the circuit are fixedly arranged below the PCB power supply board, the terminal seats are embedded in a bottom shell matched with the upper shell, a plurality of line pressing terminals which are fixed by screws and are matched with the terminal seats are arranged in the bottom shell, the power circuit comprises a plurality of switch circuits and a plurality of absorption circuits, a microprocessor is fixedly arranged on the PCB power supply board, and a high-frequency transformer electrically connected with the microprocessor is arranged on the PCB mainboard, the microprocessor outputs 38KHz frequency and realizes power isolation and power supply of the circuit under the action of the high-frequency transformer.
Furthermore, a primary resistor is connected in series on the high-frequency transformer.
Further, the high-frequency transformer is EE 28.
The invention has the beneficial effects that: according to the invention, the microprocessor outputs 38KHz frequency to replace the working mode of the existing switching power supply chip, and the microprocessor works in cooperation with the high-frequency transformer, so that power supply isolation is realized, the power supply is independently supplied for the whole circuit, the traditional switching power supply with a more complicated structure and more necessary components in the prior art is not adopted, the application cost of the switching power supply is directly reduced, the influence of the switching power supply on the PCB layout and the problem of reserving space for the switching power supply in the PCB layout process are not considered when the PCB layout is carried out, the PCB layout design is simplified, and the design cost is greatly reduced.
Drawings
FIG. 1 is a circuit diagram of a rail meter with an anti-ferromagnetic isolation power supply.
Detailed Description
In order to make the technical means, innovative features and functions of the present invention easy to understand, the present invention will be further described below.
As shown in figure 1, the technical scheme of the guide rail meter with the anti-strong magnetic isolation power supply comprises a terminal cover, an upper shell matched with the terminal cover and a power supply circuit arranged in the upper shell, wherein a PCB power supply board and a PCB mainboard display mainboard are arranged in the upper shell, a relay connecting circuit board is connected below the display mainboard, a resistance relay assembly is arranged below the relay connecting circuit board of the PCB power supply board, two terminal seats are arranged at the lower parts of two sides of the PCB power supply board, a plurality of zero line copper bars connected with the circuit are fixedly arranged below the PCB power supply board, the terminal seats are embedded in the bottom shell matched with the upper shell, a plurality of line pressing terminals which are fixed by screws and are matched with the terminal seats are arranged in the bottom shell, the power supply circuit comprises a plurality of switching circuits (namely R3, Q1 and C4) and a plurality of absorption circuits (namely C7, R44 and D5), a microprocessor is fixedly arranged on the PCB power supply board, the PCB mainboard is provided with a high-frequency transformer electrically connected with the microprocessor, and the microprocessor outputs 38KHz frequency and realizes power isolation and power supply of the circuit under the action of the high-frequency transformer. Since the invention is applied to the small-sized guide rail meter, the high-frequency transformer is a small-sized high-frequency transformer, for example, the small-sized high-frequency transformer with the model number of EE28 can be applied to the circuit, and certainly, in order to meet the space design and the PCB layout of the current guide rail meter, the small-sized high-frequency transformer can be customized according to the actual application requirements, so as to further reduce the influence of the small-sized high-frequency transformer on the internal space design of the guide rail meter.
In practical application, the anti-interference ability of strong magnetism is always a problem faced by all small-sized guide rail surfaces, a resistance-capacitance power supply is hardly influenced by the strong magnetism, the strong magnetism can only influence the high-frequency transformer, and the high-frequency transformer, particularly the small-sized high-frequency transformer, is greatly influenced by the interference of the strong magnetism due to the characteristics of small volume and small internal resistance, particularly the high frequency thereof, can influence the performance of the high-frequency transformer while mounting a strong-magnetism shielding material, which brings great trouble to the anti-interference ability of the high-frequency transformer, in the invention, the internal resistance of the high-frequency transformer is increased by connecting a primary resistor in series with the high-frequency transformer, when the current value is always in a normal working range when the high-magnetism interference occurs, a circuit can always work normally, the interference and influence of the strong magnetism on the guide rail surfaces are reduced to the minimum, and the anti-strong magnetism ability of the guide rail surfaces is greatly improved, after the design, the guide rail meter can resist the interference of strong magnetism of 300mT-500mT, and can meet the requirement of strong magnetism resistance of the guide rail meter in the normal application process.
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, and various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (3)
1. The utility model provides a guide rail table with prevent strong magnetism and keep apart power which characterized in that: comprises a terminal cover, an upper shell matched with the terminal cover, and a power circuit arranged in the upper shell, wherein a PCB power panel and a PCB mainboard display main board are arranged in the upper shell, a relay connecting circuit board is connected below the display main board, the PCB power supply board is positioned below the relay connecting circuit board and is provided with a resistance relay assembly, two terminal blocks are arranged at the lower parts of two sides of the PCB power supply board, a plurality of zero line copper bars connected with a circuit are fixedly arranged below the PCB power supply board, the terminal seat is embedded in a bottom shell matched with the upper shell, a plurality of wire pressing terminals which are fixed by screws and are matched with the terminal seat are arranged in the bottom shell, the power supply circuit comprises a plurality of switch circuits and a plurality of absorption circuits, a microprocessor is fixedly arranged on the PCB power supply board, the PCB mainboard is provided with a high-frequency transformer electrically connected with the microprocessor, and the microprocessor outputs 38KHz frequency and realizes power isolation and power supply of the circuit under the action of the high-frequency transformer.
2. The guide rail meter with the anti-strong magnetic isolation power supply of claim 1, characterized in that: and a primary resistor is also connected in series on the high-frequency transformer.
3. The guide rail meter with the anti-strong magnetic isolation power supply, according to claim 1 or 2, is characterized in that: the high-frequency transformer is EE 28.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011078253.2A CN112332636A (en) | 2020-10-10 | 2020-10-10 | Guide rail meter with anti-strong magnetic isolation power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011078253.2A CN112332636A (en) | 2020-10-10 | 2020-10-10 | Guide rail meter with anti-strong magnetic isolation power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112332636A true CN112332636A (en) | 2021-02-05 |
Family
ID=74314563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011078253.2A Pending CN112332636A (en) | 2020-10-10 | 2020-10-10 | Guide rail meter with anti-strong magnetic isolation power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112332636A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205092775U (en) * | 2015-11-16 | 2016-03-16 | 无锡隆玛科技股份有限公司 | High pressure input is turned over and is swashed power |
| CN205883057U (en) * | 2016-07-05 | 2017-01-11 | 昆明理工大学 | Ware drive power supply is used to microwave based on LCC resonance network |
| CN208015595U (en) * | 2018-04-03 | 2018-10-26 | 南宁职业技术学院 | Switching Power Supply device |
| CN110794207A (en) * | 2019-11-14 | 2020-02-14 | 浙江晨泰科技股份有限公司 | Three-phase manganin sampling alternating current guide rail meter |
| CN210724570U (en) * | 2019-12-26 | 2020-06-09 | 宁波三星智能电气有限公司 | Flyback switching power supply and electric energy meter |
-
2020
- 2020-10-10 CN CN202011078253.2A patent/CN112332636A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205092775U (en) * | 2015-11-16 | 2016-03-16 | 无锡隆玛科技股份有限公司 | High pressure input is turned over and is swashed power |
| CN205883057U (en) * | 2016-07-05 | 2017-01-11 | 昆明理工大学 | Ware drive power supply is used to microwave based on LCC resonance network |
| CN208015595U (en) * | 2018-04-03 | 2018-10-26 | 南宁职业技术学院 | Switching Power Supply device |
| CN110794207A (en) * | 2019-11-14 | 2020-02-14 | 浙江晨泰科技股份有限公司 | Three-phase manganin sampling alternating current guide rail meter |
| CN210724570U (en) * | 2019-12-26 | 2020-06-09 | 宁波三星智能电气有限公司 | Flyback switching power supply and electric energy meter |
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