CN109374936A - A kind of Current feedback power frequency magnetic field generator - Google Patents
A kind of Current feedback power frequency magnetic field generator Download PDFInfo
- Publication number
- CN109374936A CN109374936A CN201811135557.0A CN201811135557A CN109374936A CN 109374936 A CN109374936 A CN 109374936A CN 201811135557 A CN201811135557 A CN 201811135557A CN 109374936 A CN109374936 A CN 109374936A
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- CN
- China
- Prior art keywords
- current
- magnetic field
- weld holder
- frequency magnetic
- power frequency
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- 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.)
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Abstract
The invention discloses a kind of Current feedback power frequency magnetic field generators, including weld holder, baffle, weldment and master controller, the baffle is fixed on the weld holder, ventilating heat dissipating hole is provided on the baffle of the weld holder two sides, the weld holder bottom is welded with the weldment, the weldment passes through shaft and castor active link, the baffle plate setting above the weld holder has liquid crystal display, the weld holder is internally provided with the master controller, filter, stepper motor, detect measuring device, field coil, power supply, pressure regulator and current-limiting resistance for current limliting, the signal output end of the master controller is connected with the liquid crystal display and is convenient for signal transmission.Beneficial effect is: being easy to debug a little with simple and reliable, makes and reach high-precision using the mode that program-controlled step motor control pressure regulator exports, debugging conveniently, can be reserved for each electric current point data.
Description
Technical field
The invention belongs to magnetic field generator apparatus fields, and in particular to a kind of Current feedback power frequency magnetic field generator.
Background technique
The characteristics of power frequency magnetic field generator tests the power frequency magnetic field noise immunity of Electrical and Electronic product is special with requiring
The high reliability test equipment of door design, can simulate house, shopping centre, industrial and mining enterprises and power plant and middle and high electric substation
Magnetic field environment, power frequency magnetic field generator be mainly used for magnetic field it is anti-interference in test, can be to be devices under to provide a standard
True foundation.Output is adjusted usually using Manual voltage-transformation device or inverter in traditional market product, the low behaviour of its usual precision
Make difficult or higher cost, in traditional industries mostly using keypad and numeral method by control panel go to control respectively by
Keypad and numeral method, voltage acquisition display circuit." one kind 3 multiplies 3 involved in the patent of the patent No. " 201320743996.6 "
Rice power frequency magnetic field generator, including control unit, control unit control current transformer control to achieve the purpose that export magnetic field, by
Linear stabilized power supply provides operating voltage for control unit, and the input terminal of control unit connects input module, output end connection
Display unit, it is characterised in that: it is 3 meters of power frequency magnetic field coils for multiplying 3 meters, two groups of power frequency magnetic that current transformer, which connects two groups of single side sizes,
The distance between field coil is adjustable in 1~3m, and 3 provided multiply 3 meters of power frequency magnetic field generators, can by two groups of 1~3m of distance
Unilateral 3 adjusted multiply 3 meters of coil, generate the magnetic field range for multiplying 1m coil far more than 1, anti-using immersion method test for large scale equipment
Power frequency magnetic field interference provides condition ", in above-mentioned patent, the generation of power frequency magnetic field is to flow through sense by the power current of high current
It answers caused by coil.It is accurate whole by passing through after power current caused by antenna and sampling by voltage acquisition display circuit
Voltage after stream is directly proportional, adjust in secondary partial pressure to the voltage that voltage sample exports using potentiometer, obtain opposite
Voltage show value, but there is also disadvantages, when due to being that voltage sampling generates pressure drop, the decline of electric current output accuracy.
Summary of the invention
The object of the invention is that providing a kind of Current feedback power frequency magnetic field generator to solve the above-mentioned problems.
The present invention through the following technical solutions to achieve the above objectives:
A kind of Current feedback power frequency magnetic field generator, including weld holder, baffle, weldment and master controller, the weldering
It connects and is fixed with the baffle on frame, ventilating heat dissipating hole, the weld holder bottom are provided on the baffle of the weld holder two sides
Portion is welded with the weldment, and the weldment passes through shaft and castor active link, the baffle above the weld holder
It is provided with liquid crystal display, the weld holder is internally provided with the master controller, filter, stepper motor, detection measuring device, magnetic
Field coil, power supply, pressure regulator and the current-limiting resistance for current limliting, the signal output end of the master controller are connected with the liquid crystal
Screen is convenient for signal transmission, and the master controller is connected to the stepper motor by the driver and carries out driving motor.
In order to further increase service performance of the invention, the stepper motor uses two-phase hybrid stepping motor, limit
Input current processed is direct current 10-40 volt.
In order to further increase service performance of the invention, the detection measuring device includes that current transformer and voltage are mutual
Sensor is convenient for test voltage and electric current.
In order to further increase service performance of the invention, the current-limiting resistance fixed by metallic resistance pallet and with dissipate
Heat.
In order to further increase service performance of the invention, the current-limiting resistance is connected to by conducting wire and the pressure regulator
Circuit plays the role of protecting circuit convenient for electric current in limiting circuit.
In order to further increase service performance of the invention, the master controller connects the stepper motor just by conducting wire
It is finely adjusted in the pressure regulator.
In order to further increase service performance of the invention, the master controller is believed by pulse signal input line, direction
Number three control lines of input line and off line signal input line and the driver communicate to connect, and are provided with red light on driver and are used for
It is used as warning light.
In order to further increase service performance of the invention, the liquid crystal display is touch display screen.
In above structure, a current value such as 100A/M is first inputted in the operation interface of the liquid crystal display, and when operation
Between, such as 10S, the master controller briefly returns to minimum point 0V by detecting the lower voltage limit on the pressure regulator, passes through the inspection
The voltage that the voltage transformer surveyed in measuring device acquires the pressure regulator both ends calculates the voltage of each step, by converting
To the step number currently needed, carrying out sampling by current transformer is finely adjusted the pressure regulator by the master controller
The setting electric current arrived obtains a true field by the field coil, and the stepper motor actual current is bigger, and output turns
Square is bigger, but copper olse (P=I2R) is more, and it is on the high side that the motor feels hot, when phase fault or internal drive overcurrent occurs,
Driver red lamp flass must re-power reset at this time, and when input voltage is higher than 42V, the red lamp flass of driver at this time must
Reset must be re-powered, when motor is opened a way or do not connect, the red lamp flass of driver must re-power reset at this time.
Beneficial effect is: the present invention controls electric current principle by voltage and passes through step motor control using current feedback
Pressure regulator stabilizes the output voltage electric current, in control circuit design, using control system and and electric current, voltage transformer realization
The acquisition of output voltage, electric current, conversion and processing.It is easy to debug a little with simple and reliable, uses program-controlled stepper motor control
The mode of pressure regulator output processed makes and reaches high-precision, and debugging is convenient, can be reserved for each electric current point data.
Detailed description of the invention
Fig. 1 is a kind of main view of Current feedback power frequency magnetic field generator of the present invention；
Fig. 2 is a kind of inner workings figure of Current feedback power frequency magnetic field generator of the present invention；
Fig. 3 is a kind of stepper motor driving principle figure of Current feedback power frequency magnetic field generator of the present invention.
The reference numerals are as follows:
1, weld holder；2, baffle；3, ventilating heat dissipating hole；4, liquid crystal display；5, weldment；6, castor；7, master controller；8, it filters
Wave device；9, stepper motor；10, measuring device is detected；11, field coil；12, power supply；13, pressure regulator；14, current-limiting resistance；15,
Driver.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in Figure 1-3, a kind of Current feedback power frequency magnetic field generator, including weld holder 1, baffle 2,5 and of weldment
Master controller 7 is fixed with baffle 2 on weld holder 1, ventilating heat dissipating hole 3, weld holder 1 is provided on the baffle 2 of 1 two sides of weld holder
Bottom is welded with weldment 5, and weldment 5 is provided with liquid crystal by shaft and 6 active link of castor, the baffle 2 of 1 top of weld holder
Screen 4, weld holder 1 are internally provided with master controller 7, filter 8, stepper motor 9, detection measuring device 10, field coil 11, electricity
Source 12, pressure regulator 13 and the current-limiting resistance 14 for current limliting, the signal output end of master controller 7 are connected with liquid crystal display and are convenient for
Signal transmission, master controller 7 are connected to stepper motor 9 by driver 15 and carry out driving motor.
In order to further increase service performance of the invention, stepper motor 9 uses two-phase hybrid stepping motor, limits defeated
Enter electric current for direct current 10-40 volt, detection measuring device 10 include current transformer and voltage transformer convenient for test voltage and
Electric current, current-limiting resistance 14 fixed by metallic resistance pallet and with heat dissipation, current-limiting resistance 14 connect by conducting wire with pressure regulator 13
Play the role of protecting circuit convenient for electric current in limiting circuit in circuit, master controller 7 connects stepper motor 9 by conducting wire and is convenient for
Pressure regulator 13 is finely adjusted, master controller 7 passes through pulse signal input line, direction signal input line and off line signal input line
Three control lines and driver 15 communicate to connect, and red light are provided on driver 15 for using as warning light, liquid crystal display 4 is
Touch display screen.
In above structure, current value such as a 100A/M and runing time are first inputted in the operation interface of liquid crystal display 4,
Such as 10S, master controller 7 briefly returns to minimum point 0V by the lower voltage limit on detection pressure regulator 13, by detecting measuring device 10
In the voltage at voltage transformer acquisition 13 both ends of pressure regulator calculate the voltage of each step, currently needed by converting
Step number carries out the setting electric current that sampling is finely adjusted pressure regulator 13 by master controller 7 by current transformer, passes through
Field coil 11 obtains a true field, and 9 actual current of stepper motor is bigger, and output torque is bigger, but copper olse (P=
I2R) more, it is on the high side that the motor feels hot, and when phase fault or internal drive overcurrent occurs, driver red lamp flass at this time must
Reset must be re-powered, the red lamp flass of driver must re-power reset at this time when input voltage is higher than 42V, work as motor
When opening a way or not connecing, the red lamp flass of driver must re-power reset at this time.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and equivalents circle
It is fixed.
Claims (8)
1. a kind of Current feedback power frequency magnetic field generator, including weld holder, baffle, weldment and master controller, feature exist
In: it is fixed with the baffle on the weld holder, is provided with ventilating heat dissipating hole on the baffle of the weld holder two sides, it is described
Weld holder bottom is welded with the weldment, and the weldment is by shaft and castor active link, above the weld holder
The baffle plate setting has liquid crystal display, and the weld holder is internally provided with the master controller, filter, stepper motor, detection survey
Measure device, field coil, power supply, pressure regulator and the current-limiting resistance for current limliting, the signal output end connection of the master controller
There is the liquid crystal display to be convenient for signal transmission, the master controller is connected to the stepper motor by the driver and carries out
Driving motor.
2. a kind of Current feedback power frequency magnetic field generator according to claim 1, it is characterised in that: the stepper motor
Using two-phase hybrid stepping motor, input current is limited as direct current 10-40 volt.
3. a kind of Current feedback power frequency magnetic field generator according to claim 1, it is characterised in that: the detection measurement
Device includes current transformer and voltage transformer convenient for test voltage and electric current.
4. a kind of Current feedback power frequency magnetic field generator according to claim 1, it is characterised in that: the current-limiting resistance
Fixed by metallic resistance pallet and with heat dissipation.
5. a kind of Current feedback power frequency magnetic field generator according to claim 1, it is characterised in that: the master controller
The stepper motor is connected by conducting wire convenient for being finely adjusted to the pressure regulator.
6. a kind of Current feedback power frequency magnetic field generator according to claim 1, it is characterised in that: the current-limiting resistance
Circuit is connected to by conducting wire and the pressure regulator to play the role of protecting circuit convenient for electric current in limiting circuit.
7. a kind of Current feedback power frequency magnetic field generator according to claim 1, it is characterised in that: the master controller
Pass through pulse signal input line, three control lines of direction signal input line and off line signal input line and the driver communication link
It connects, red light is provided on driver for using as warning light.
8. a kind of Current feedback power frequency magnetic field generator according to claim 1, it is characterised in that: the liquid crystal display is
Touch display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135557.0A CN109374936A (en) | 2018-09-28 | 2018-09-28 | A kind of Current feedback power frequency magnetic field generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135557.0A CN109374936A (en) | 2018-09-28 | 2018-09-28 | A kind of Current feedback power frequency magnetic field generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109374936A true CN109374936A (en) | 2019-02-22 |
Family
ID=65402150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811135557.0A Pending CN109374936A (en) | 2018-09-28 | 2018-09-28 | A kind of Current feedback power frequency magnetic field generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN109374936A (en) |
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| CN105425186A (en) * | 2015-11-25 | 2016-03-23 | 国网宁夏电力公司电力科学研究院 | Magnetic field interference generating device for verification of iron-core earth current tester |
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| CN107068327A (en) * | 2016-11-04 | 2017-08-18 | 葛露露 | A kind of pulsed magnetic generator and its method of work |
| CN206756887U (en) * | 2017-03-01 | 2017-12-15 | 北京明日电力电子有限公司 | A kind of experiment power supply |
| KR20180076012A (en) * | 2016-12-27 | 2018-07-05 | 재단법인 자동차융합기술원 | Electromagnetic compatibility Performance test system for Alternator and voltage regulator |
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2018
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Patent Citations (16)
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|---|---|---|---|---|
| EP1278286A2 (en) * | 2001-07-18 | 2003-01-22 | Delphi Technologies, Inc. | Voltage regulator control circuit |
| CN1797022A (en) * | 2004-12-24 | 2006-07-05 | 上海电器科学研究所（集团）有限公司 | Method for setting and holding high current |
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| CN103592475A (en) * | 2013-11-21 | 2014-02-19 | 上海三基电子工业有限公司 | 3*3m power frequency magnetic field generator |
| CN203849300U (en) * | 2013-11-21 | 2014-09-24 | 上海三基电子工业有限公司 | Power frequency magnetic field generator of 3m*3 m |
| CN204694836U (en) * | 2015-06-18 | 2015-10-07 | 江西服装学院 | A kind of electric energy meter power frequency magnetic field influence amount test unit |
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| CN106597356A (en) * | 2016-12-03 | 2017-04-26 | 国网江西省电力公司电力科学研究院 | Single-phase electric energy meter power frequency magnetic field influence quantity testing apparatus |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190222 |
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| RJ01 | Rejection of invention patent application after publication |