CN1862268A - Power frequency magnetic field generator - Google Patents
Power frequency magnetic field generator Download PDFInfo
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- CN1862268A CN1862268A CN 200610027626 CN200610027626A CN1862268A CN 1862268 A CN1862268 A CN 1862268A CN 200610027626 CN200610027626 CN 200610027626 CN 200610027626 A CN200610027626 A CN 200610027626A CN 1862268 A CN1862268 A CN 1862268A
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Abstract
The present invention relates to a power frequency magnetic field generator. It includes the following several portions: switch power supply, control panel, power-frequency current generation loop, key board and nixie display and voltage acquisition display circuit. Said invention also provides the connection mode of all the above-mentioned portions and its working principle and operation method.
Description
Technical field
The present invention relates to a kind of power frequency magnetic field generator that is used for the Electrical and Electronic product testing, belong to electric product experimental technique field.
Background technology
Power frequency magnetic field generator is a kind of instrument of the power frequency magnetic field immunity experiment at the Electrical and Electronic product.This generator can be simulated dwelling house, shopping centre, industrial and mining enterprises and generating plant, and middle and high magnetic field environment of pressing electric substation.
The product of prior art is after inserting the power frequency antenna, regulates electric current in the middle of operation, power current is regulated increased to required electric current gradually, has reduced the accuracy of experiment; Sometimes when selecting big in short-term current work mode for use,, is used in the adjusting time that produces big electric current mostly owing to regulate electric current, and considerably beyond standard code be not more than 3 seconds.
In addition, some product does not have the working time to limit, and when the user uses, tests inaccurate owing to exceeding experimental period sometimes.
Therefore, be necessary this power frequency magnetic field generator is researched and developed improvement, to adapt to the power frequency magnetic field immunity experiment of Electrical and Electronic product.
Summary of the invention
The object of the present invention is to provide a kind of power frequency magnetic field generator that is used for the Electrical and Electronic product testing, this generator can satisfy magnetic field intensity: 0A/m～1000A/m, current waveform: 50Hz or 60Hz sine wave, working method: continuous fashion (0A/m～100A/m) in short-term mode (100A/m～1000A/m 1～3s), and current waveform adds aberration rate:＜8%.
For achieving the above object, technical scheme of the present invention is: its hardware comprises that Switching Power Supply, control panel, power current produce loop, keypad and charactron demonstration, voltage acquisition display circuit.
Switching Power Supply is connected to control panel, and keypad and charactron demonstration remove to control respectively keypad by control panel and charactron shows, the voltage acquisition display circuit.
Beneficial effect of the present invention: the power frequency magnetic field generator of making according to technical scheme of the present invention that is used for the Electrical and Electronic product testing, can simulate dwelling house, shopping centre, industrial and mining enterprises and generating plant, and middle and high magnetic field environment of pressing electric substation, satisfy testing requirements, have certain economic benefits.
Below in conjunction with drawings and Examples to the present invention's detailed explanation of making comparisons.
Description of drawings
Fig. 1 is used for the power frequency magnetic field generator hardware principle block diagram of Electrical and Electronic product testing for the present invention;
Fig. 2 is used for the power frequency magnetic field generator major loop theory diagram of Electrical and Electronic product testing for the present invention;
Fig. 3 produces circuit theory figure for the power frequency magnetic field generator power current that the present invention is used for the Electrical and Electronic product testing;
Fig. 4 is used for the power frequency magnetic field generator voltage acquisition display circuit schematic diagram of Electrical and Electronic product testing for the present invention.
Embodiment
With reference to Fig. 1, this is the power frequency magnetic field generator hardware principle block diagram that the present invention is used for the Electrical and Electronic product testing.
As shown in the figure, described power frequency magnetic field generator hardware comprises that Switching Power Supply 1, control panel 2, power current produce loop 3, keypad 4, charactron demonstration 5, voltage acquisition display circuit 6.
Described Switching Power Supply 1 is connected to control panel 2, and described keypad 4 removes to control keypad 4 and charactron demonstration 5 and voltage acquisition display circuit 6 with charactron demonstration 5 respectively by control panel 2.
Described control panel, its core are the SM8951 single-chip microcomputers of SYNC MOS.
With reference to Fig. 2, this is a power frequency magnetic field generator major loop theory diagram of the present invention.
Described power frequency magnetic field generator major loop comprises power frequency supply 7, pressure regulator 8,10: 1 step-down transformers 9, step-down transformer 10, antenna 11, voltage peak Acquisition Circuit 12, voltage indicator gauge 13.
This generator adopts from the method for pressure regulator sampling, at little step-down transformer of output termination of pressure regulator (220V～5V), the step-down transformer output voltage is followed through voltage follower after through the precise rectification circuit of being made up of amplifier (or claiming peak-detector circuit) again, then by receiving digital voltmeter output after the adjustment of potentiometer dividing potential drop.
The output terminal of pressure regulator through step-down transformer, is connected to the power frequency magnetic field antenna.
Because antenna can be regarded the resistive load of a constant-resistance value as, the power current of the antenna of therefore flowing through is directly proportional with the alternating voltage that is applied to its two ends, promptly is directly proportional by the voltage behind the precision rectifying with the sampling back by the power current that antenna produced.
With reference to Fig. 3, this is the schematic diagram that power frequency magnetic field generator power current of the present invention produces part.
As shown in the figure, described power current produces part, this generator has been realized the mode that power current presets, make the user before generator inserts the power frequency antenna or before the generator operation, can pre-set required power current, the process that the user has big power current to produce before the cancellation when regulating electric current.
The generation of power frequency magnetic field is produced by the power current of the big electric current inductive coil of flowing through.Power current produces power-frequency voltage by 220V through a powerful pressure regulator, and again through a powerful step-down transformer step-down, the resistive antenna that is connected to a constant-resistance value forms can be by the power current of pressure regulator control.
Because working method has two kinds, (power current is very little during 0A～50A), and degree of accuracy is not high when only being controlled by pressure regulator, and current sample is also inaccurate for working method when long.Employing adds the step-down transformer of 220V a: 22V at output voltage regulator, make to produce identical electric current, and pressure regulator output than before about ten times voltage, reach the purpose of accurate control output current.Make the user when regulating pressure regulator, rotate the knob of equal angular and the variation of electric current is reduced to 10%.Make the precision of Current Regulation reach 0.05A in this way.
With reference to Fig. 4, this is a power frequency magnetic field generator voltage acquisition display circuit schematic diagram of the present invention.
As shown in the figure, described voltage acquisition display circuit, be directly proportional by the voltage behind the precision rectifying with the sampling back by the power current that antenna produced, carry out to obtain quite accurate voltage displayed value through the voltage of potentiometer again in inferior dividing potential drop fine setting to voltage sample output.
Therefore adopt two potentiometers to use different intrinsic standoff ratios to export to voltage table at the follower output terminal.The setting of working method and short-term operation mode SET button when long of two signals is switched accordingly, to guarantee voltage accuracy.And when long during working method, because pressure regulator output is earlier through a step-down transformer of 10: 1, so voltage table shows than big ten times of actual values, thereby corresponding second of showing at voltage table is provided with a radix point, obtains correct result.
Though the present invention describes with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment is used for illustrating the present invention; should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense; so be not as limitation of the invention; as long as in connotation scope of the present invention, to the variation of above-described embodiment, the protection domain that distortion all will fall into claim of the present invention.
Claims (5)
1, the power frequency magnetic field generator that is used for the Electrical and Electronic product testing comprises that Switching Power Supply (1), control panel (2), power current produce loop (3), keypad (4) shows (5), voltage acquisition display circuit (6) with charactron; It is characterized in that: described control panel (2), keypad (4) show (5) with charactron, are to be core with the single card microcomputer; Described power current produces the loop and comprises inductive coil, pressure regulator, antenna; Described voltage acquisition display circuit comprises antenna, precision rectifying, potentiometer; Described control panel is core with the single card microcomputer, single card microcomputer amplifies driving relay and pilot lamp by optocoupler through triode, step-down transformer of output termination at pressure regulator, follow through voltage follower again after its output voltage being passed through the precise rectification circuit of forming by amplifier, be crimped onto digital voltmeter output by the potentiometer branch then.
2, power frequency magnetic field generator as claimed in claim 1 is characterized in that: described control panel, and its core is a single-chip microcomputer, single-chip microcomputer adopts the SM8951 of SYNC MOS.
3, power frequency magnetic field generator as claimed in claim 1, it is characterized in that: described power frequency magnetic field generator major loop comprises power frequency supply (7), pressure regulator (8), 10: 1 step-down transformers (9), step-down transformer (10), antenna (11), voltage peak collection (12), voltage indicator gauge (13);
Little step-down transformer of output termination (9) at pressure regulator (8), with the precise rectification circuit of step-down transformer output voltage through forming by amplifier, after follow through voltage follower again, then by receiving digital voltmeter output after the adjustment of potentiometer dividing potential drop, the output terminal of pressure regulator, through step-down transformer, be connected to the power frequency magnetic field antenna.
4, power frequency magnetic field generator as claimed in claim 1, it is characterized in that: described power current produces circuit, power current produces power-frequency voltage by 220V through a powerful pressure regulator, again through a powerful step-down transformer step-down, the resistive antenna that is connected to a constant-resistance value forms can be by the power current of pressure regulator control, and the generation of power frequency magnetic field is produced by the power current of the big electric current inductive coil of flowing through.
5, power frequency magnetic field generator as claimed in claim 1, it is characterized in that: described voltage acquisition display circuit, be directly proportional by the voltage behind the precision rectifying with the sampling back by the power current that antenna produced, carry out obtaining the voltage displayed value through the voltage of potentiometer again in inferior dividing potential drop fine setting to voltage sample output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610027626 CN1862268A (en) | 2006-06-13 | 2006-06-13 | Power frequency magnetic field generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610027626 CN1862268A (en) | 2006-06-13 | 2006-06-13 | Power frequency magnetic field generator |
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| CN1862268A true CN1862268A (en) | 2006-11-15 |
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| CN 200610027626 Pending CN1862268A (en) | 2006-06-13 | 2006-06-13 | Power frequency magnetic field generator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520270A (en) * | 2011-11-24 | 2012-06-27 | 浪潮电子信息产业股份有限公司 | Method for testing ultimate working performance of server system accessories |
| CN102650662A (en) * | 2011-02-24 | 2012-08-29 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic generating device for electromagnetic interference testing |
| CN107029613A (en) * | 2017-05-10 | 2017-08-11 | 包头市鑫业新材料有限责任公司 | A kind of rare metal alloy electromagnetic processing equipment |
| CN108152725A (en) * | 2017-12-14 | 2018-06-12 | 国网宁夏电力有限公司电力科学研究院 | A kind of electric switch Interruption experimental rig |
| CN109374936A (en) * | 2018-09-28 | 2019-02-22 | 深圳市霍达尔仪器有限公司 | A kind of Current feedback power frequency magnetic field generator |
-
2006
- 2006-06-13 CN CN 200610027626 patent/CN1862268A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650662A (en) * | 2011-02-24 | 2012-08-29 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic generating device for electromagnetic interference testing |
| CN102520270A (en) * | 2011-11-24 | 2012-06-27 | 浪潮电子信息产业股份有限公司 | Method for testing ultimate working performance of server system accessories |
| CN107029613A (en) * | 2017-05-10 | 2017-08-11 | 包头市鑫业新材料有限责任公司 | A kind of rare metal alloy electromagnetic processing equipment |
| CN108152725A (en) * | 2017-12-14 | 2018-06-12 | 国网宁夏电力有限公司电力科学研究院 | A kind of electric switch Interruption experimental rig |
| CN109374936A (en) * | 2018-09-28 | 2019-02-22 | 深圳市霍达尔仪器有限公司 | A kind of Current feedback power frequency magnetic field generator |
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