CN106019023A - Electromagnetic oven electromagnetic compatible optimization method - Google Patents
Electromagnetic oven electromagnetic compatible optimization method Download PDFInfo
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- CN106019023A CN106019023A CN201610526275.8A CN201610526275A CN106019023A CN 106019023 A CN106019023 A CN 106019023A CN 201610526275 A CN201610526275 A CN 201610526275A CN 106019023 A CN106019023 A CN 106019023A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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Abstract
The invention discloses an electromagnetic oven electromagnetic compatible optimization method. The method is characterized by comprising the following steps: A, testing terminal disturbance voltages; B, analyzing test result data and a circuit; performing reference comparison on data mean values, and determining a margin comprising a main frequency portion; and dividing a frequency range, wherein 1KHz-1MHz differential-mode signals coexist with common-mode signals, the differential-mode signals takes up a major part, and signals with frequencies more than 1MHz are mainly the common-mode signals; C, performing plate combination instrument test comparison testing on differential-mode and common-mode interference causes, and performing adjustment through additional arrangement of a filtering circuit to the circuit; D, testing the terminal disturbance voltages in the step A after the circuit adjustment so as to verify increases of margins of the main frequency portion and other frequencies; E, testing electromagnetic radiation disturbance; F, analyzing test result data; and G, testing the electrometric radiation disturbance in the step E after a riving circuit is adjusted, such that it can be verified that the integral curve satisfies a standard requirement, the development cost is saved, the batch production cost of a product is decreased, and the market competitiveness of the product is improved.
Description
[technical field]
The present invention relates to a kind of electromagnetic oven electromagnetic compatibility optimization method.
[technical background]
The Electro Magnetic Compatibility of electromagnetic oven, is increasingly taken seriously, and the renewal of national legislation just embodies to this point.Mesh
The electromagnetic oven of front Way out difficult point in terms of Electro Magnetic Compatibility is embodied in the suppression of EMI.Electromagnetic oven
The fiery of market just requires that product has higher competitiveness, then the pressure of cost becomes the most prominent
Embody.Except considering on material, but more should go to break through from the technical standpoint of product.Power filter
Circuit is requisite, so its design is of crucial importance, it is necessary to the frequency improving filter circuit is damaged
Power consumption power, thus needs us to devote more time and energy in the application aspect of magnetic material.Comprehensively analyze electromagnetism
The type of interference, utilizes differential mode harassing and wrecking and the characteristic of common mode harassing and wrecking, and frequency-division section is broken through one by one.Additionally need
It is optimized from LAYOUT angle, thus ensures that filter circuit is not affected by coupling and crosstalk.
Electro Magnetic Compatibility is developed into prediction and design in advance by process afterwards.Electromagnetic compatibility becomes
For the important component part in modern engineering design.Electro Magnetic Compatibility certification up to standard is by a national model
Enclose to whole world regional development, make Electro Magnetic Compatibility and safety, environmental suitability be in of equal importancely
Position.
In order to overcome above-mentioned problem, we have developed a kind of electromagnetic oven electromagnetic compatibility optimization method.
[summary of the invention]
Purpose of the present invention technical problem to be solved is intended to provide a kind of electromagnetic oven electromagnetic compatibility optimization
Method, it can carry out scheme optimization with circuit, save development cost, reduce product volume production cost, carry
The market competitiveness of high product, thus rely on international standard, in line with international standards, implement electromagnetic compatibility
Technical regulation, solves this industry issue of electromagnetic compatibility of electromagnetic oven.
To achieve these goals, the technical solution used in the present invention: a kind of electromagnetic oven electromagnetic compatibility is excellent
Change method, it is characterised in that comprise the steps of
A. Terminal Disturbance Voltage is tested；Tested utensil EUT is placed on insulation high for 0.8m prop up
On frame, insulating support is placed in ground reference plane, and the power line of EUT passes through the artificial power supply of V-type
Network receives alternating current power supply, and tested utensil is equal to 0.8m, with measurement with the distance of artificial mains network
The distance of instrument is not less than 0.8m；
B. test result data and circuit are analyzed；Statistical average is carried out with reference to comparing, really
Surely the allowance of dominant frequency part is included；Frequency range is divided, 1KHz-1MHz difference mode signal and common mode
Signal coexistence, difference mode signal accounts for main component.More than 1MHz is mainly common-mode signal；
C. carry out point hardening and close instrument test contrast test producing differential mode common mode disturbances reason, pass through
Circuit is set up filter circuit, to rectification circuit, switching tube, high frequency transformer, direct current output,
Ground connection, shielding accommodation；
D. test to verify dominant frequency portion to the Terminal Disturbance Voltage carrying out step A after the regulation of electrical circuit
Divide and the allowance of other frequencies increases；
E. electromagnetic radiation harassing and wrecking are tested；Tested utensil EUT is placed on insulation high for 0.8m prop up
On frame, insulating support is placed in ground reference plane, it is provided that the power supply of EUT rated voltage connects,
Set distance between reception antenna and EUT as 3m, measurement antenna is placed in horizontal and vertical polarization
Under two states, then measurement antenna is allowed to be placed on each different azimuth and test；
F. test result data is analyzed；Measurement antenna is placed in horizontal and vertical Polarimetric detection
Detection curve under state, peak value compares with standard limited value, to determine the frequency range that exceeds standard；From water
Square it is defined as common-mode signal interference to the frequency range that exceeds standard, and then drive circuit is carried out resistance tune
Whole；
G. drive circuit is adjusted laggard row carry out step E electromagnetic radiation harassing and wrecking test,
Meet standard-required with checking integrated curved, can complete.
Further, in described step A, V-type artificial mains network is symmetrical expression
50 Ω/(50 μ H5 Ω) two-wire V-type artificial mains network.
Further, the test voltage in described step A is 230V/50Hz；Mode of operation is
High power work pattern.
Further, described peak power mode of operation power is 2000W.
Further, the test voltage in described step E is 230V/50Hz；Mode of operation is maximum
Power modes of operation, power is 2000W.
The present invention is produced beneficial effect compared with background technology:
Present invention employs technique scheme, it can carry out scheme optimization with circuit, saves fee to develop
With, reduce product volume production cost, improve the competitiveness of product in market, thus rely on international standard, with
International joint, implements the technical regulation of electromagnetic compatibility, and this industry of electromagnetic compatibility solving electromagnetic oven is asked
Topic.
[accompanying drawing explanation]
Fig. 1 is in step A of electromagnetic oven electromagnetic compatibility optimization method to harass terminal in the embodiment of the present invention
Voltage carries out test layouts schematic diagram；
Fig. 2 be in the embodiment of the present invention in electromagnetic oven electromagnetic compatibility optimization method in step B terminal harassing and wrecking electricity
The detection data analysis figure of pressure；
Fig. 3 is filter circuit portion in step C in electromagnetic oven electromagnetic compatibility optimization method in the embodiment of the present invention
Parallel circuit figure；
Step D Terminal Disturbance Voltage in electromagnetic oven electromagnetic compatibility optimization method in Fig. 4 embodiment of the present invention
Detection data analysis figure；
Fig. 5 is step E electromagnetic radiation harassing and wrecking in electromagnetic oven electromagnetic compatibility optimization method in the embodiment of the present invention
Test layouts figure；
Fig. 6 is that in the embodiment of the present invention, in electromagnetic oven electromagnetic compatibility optimization method, the measurement antenna of step F is put
Amount detection analysis chart in horizontal level；
Fig. 7 is that in the embodiment of the present invention, in electromagnetic oven electromagnetic compatibility optimization method, the measurement antenna of step F is put
Amount detection analysis chart in upright position；
Fig. 8 is the drive circuit of step G in electromagnetic oven electromagnetic compatibility optimization method in the embodiment of the present invention
Figure；
Fig. 9 is that in the embodiment of the present invention, in electromagnetic oven electromagnetic compatibility optimization method, the measurement antenna of step G is put
Amount detection analysis chart in horizontal level；
Figure 10 is the measurement antenna of step G in electromagnetic oven electromagnetic compatibility optimization method in the embodiment of the present invention
It is placed in the amount detection analysis chart of upright position.
[detailed description of the invention]
Below in conjunction with the accompanying drawing of description, by the detailed description of the invention of the present invention is further retouched
State, make technical scheme and beneficial effect thereof clearer, clear and definite.Below with reference to attached
It is exemplary that figure describes embodiment, it is intended to explain the present invention, and it is not intended that limit to the present invention
System.
The embodiment of the offer that refer to the combination present invention shown in Fig. 1-10 is a kind of electromagnetic oven electromagnetism
Compatible optimization method, comprises the steps of
A. Terminal Disturbance Voltage is tested；Tested utensil EUT is placed on insulation high for 0.8m prop up
On frame, insulating support is placed in ground reference plane, and the power line of EUT passes through the artificial power supply of V-type
Network receives alternating current power supply, and tested utensil is equal to 0.8m, with measurement with the distance of artificial mains network
The distance of instrument is not less than 0.8m；
B. test result data and circuit are analyzed；Statistical average is carried out with reference to comparing, really
Surely the allowance of dominant frequency part is included；Frequency range is divided, 1KHz-1MHz difference mode signal and common mode
Signal coexistence, difference mode signal accounts for main component.More than 1MHz is mainly common-mode signal；
C. carry out point hardening and close instrument test contrast test producing differential mode common mode disturbances reason, pass through
Circuit is set up filter circuit, to rectification circuit, switching tube, high frequency transformer, direct current output,
Ground connection, shielding accommodation；
D. test to verify dominant frequency portion to the Terminal Disturbance Voltage carrying out step A after the regulation of electrical circuit
Divide and the allowance of other frequencies increases；
E. electromagnetic radiation harassing and wrecking are tested；Tested utensil EUT is placed on insulation high for 0.8m prop up
On frame, insulating support is placed in ground reference plane, it is provided that the power supply of EUT rated voltage connects,
Set distance between reception antenna and EUT as 3m, measurement antenna is placed in horizontal and vertical polarization
Under two states, then measurement antenna is allowed to be placed on each different azimuth and test；
F. test result data is analyzed；Measurement antenna is placed in horizontal and vertical Polarimetric detection
Detection curve under state, peak value compares with standard limited value, to determine the frequency range that exceeds standard；From water
Square it is defined as common-mode signal interference to the frequency range that exceeds standard, and then drive circuit is carried out resistance tune
Whole；
G. drive circuit is adjusted laggard row carry out step E electromagnetic radiation harassing and wrecking test,
Meet standard-required with checking integrated curved, can complete.
In described step A, V-type artificial mains network is symmetrical expression 50 Ω/(50 μ H5 Ω) two-wire V
Type artificial mains network.Test voltage in described step A is 230V/50Hz；Mode of operation is
Peak power mode of operation.Described peak power mode of operation power is 2000W.Described step E
In test voltage be 230V/50Hz；Mode of operation is peak power mode of operation, and power is
2000W。
Shown in Fig. 1.Test environment is first made parameter limit, entered by Terminal Disturbance Voltage
Row test layouts carries out the requirement of coherent detection.
Shown by Fig. 2, it is in step B, is analyzed test result data and circuit, institute
It is shown as the detection data of Terminal Disturbance Voltage.Test voltage: 230V/50Hz mode of operation: maximum work
Rate mode of operation (2000W) detection port: L, 0.175KHz meansigma methods only has 3.7DB allowance,
Although 5.085MHz meansigma methods only has 2.5DB allowance. meet laws and regulations requirement, but allowance is fewer.Main
Frequently part allowance is bigger.Frequency range divides: 1KHz-1MHz difference mode signal and common-mode signal coexist, differential mode
Signal accounts for main component.More than 1MHz is mainly common-mode signal.From the situation shown in figure, need into
Row considers, and analyzes and produces differential mode common mode disturbances reason in addition instrument test contrast test.
In conjunction with illustrated in fig. 3, introduce filter circuit, improve rectification circuit, switching tube, high frequency change
The problems such as the output of depressor, direct current, ground connection, shielding.Cost, fabric swatch, mass production problem.Suppressor
Part is started with, and selects suitable material, controls cost improvement and optimizes suppression device.According to need to improve frequency range by
Individual circuit analysis solves problem.The filter circuit part for power supply leading portion shown in figure 3.From
Optimize filter circuit to start with, adjust common mode device inhibition.Thus improve PCB LAYOUT, make filter
Wave device is far as possible from drum, because dominant frequency is relatively low, can suitably reduce X2 electric capacity；Therefore, can will enter
Row rectification, power supply leading portion 4UF X2 (C0) removes, and removes 400UH (L2) differential mode choke coil；Increase
Common mode inductance, inductance value is more than 12MH (1KHz, 0.3V).
Illustrated in fig. 4 is that the Terminal Disturbance Voltage carrying out step A after the regulation of electrical circuit is tested, with
Carrying out the contrast of effective effect, it is the detection curve of L port, at dominant frequency 21.9KHz quasi-peak value
There is 3.1DB allowance.Less than standard limited value.At 155KHz, meansigma methods has 3.1DB allowance, less than standard
Limit value, remaining frequency all has bigger allowance, conformance with standard requirement.
Shown in Fig. 5, in electromagnetic oven electromagnetic compatibility optimization method, step E electromagnetic radiation harassing and wrecking are surveyed
Examination layout；Tested utensil EUT is placed on the high insulating support of 0.8m, and insulating support is placed on ground connection ginseng
Examining in plane (GRP), it is provided that the power supply of EUT rated voltage, the distance between reception antenna and EUT is
3m, measures antenna and is under horizontal and vertical polarization two states, measure antenna and should be placed on each not
On same azimuth.
Shown in Fig. 6, in electromagnetic oven electromagnetic compatibility optimization method, the measurement antenna of step F is put
Amount detection analysis chart test voltage in horizontal level: 230V/50Hz mode of operation: peak power
Mode of operation (2000W), horizontal direction detection curve, 187.45MHz quasi-peak value exceeds standard limited value.
Illustrated in fig. 7 is to detection curve from weight Nogata, meets standard, and the horizontal direction frequency range that exceeds standard is common
Mould signal disturbing, it is judged that for IGBT drive circuit subproblem, analyze and produce differential mode common mode disturbances reason
With instrument test contrast test.The parameter of analysis-driven circuit is constituted, thus optimizes correlation values.
Drive circuit as illustrated in FIG. 8, the ingredient of drive circuit, can suitably by R43 and R42
Resistance adjust, but it is noted that temperature rise has to comply with standard-required.Select the control of magnetic material properties
And cost requirement, original NIZN core inductance is changed to coiling in wire body fixing with heat-shrinkable T bush
Mode substitutes, and inhibition is obvious, and supplied materials controls to be effectively improved to reduce use simultaneously
Material cost.Magnetic core specification is 25*15*12 (external diameter * internal diameter * height), and unit is mm.In wire body
Coiling 5 is enclosed.Material is NIZN ferrite, and initial permeability is about 700, cost about 0.45RMB,
The producer of mist projection granulating processing technology can be preferably provided with.Before and after Cost comparisons can be drawn through statistics
Following form:
Illustrated in fig. 9, measure antenna and be placed in the amount detection analysis chart of horizontal level, level side
To detection curve, 187.45MHz quasi-peak value substantially has improvement.Less than standard limited value, manual read point has
5.7DB allowance.Illustrated in fig. 10, vertical direction detection curve, integrated curved meets standard and wants
Ask.41.66MHz quasi-peak value has 5.1DB allowance.More preferably technical effect it is fully achieved after optimization,
Circuit carries out scheme optimization, saves development cost, reduces product volume production cost, improves the market of product
Competitiveness, thus rely on international standard, in line with international standards, implement the technical regulation of electromagnetic compatibility, from
And this industry technology difficult problem of electromagnetic compatibility of effective solution electromagnetic oven.
Claims (5)
1. an electromagnetic oven electromagnetic compatibility optimization method, it is characterised in that comprise the steps of
A. Terminal Disturbance Voltage is tested；Tested utensil EUT is placed on the high insulating support of 0.8m,
Insulating support is placed in ground reference plane, and the power line of EUT receives exchange by V-type artificial mains network
Power supply, tested utensil is equal to 0.8m with the distance of artificial mains network, is not less than with the distance of measuring instrument
0.8m；
B. test result data and circuit are analyzed；Carry out statistical average, with reference to comparing, determining bag
Include the allowance of dominant frequency part；Dividing frequency range, 1KHz-1MHz difference mode signal and common-mode signal coexist,
Difference mode signal accounts for main component, and more than 1MHz is mainly common-mode signal；
C. carry out point hardening and close instrument test contrast test, by electricity producing differential mode common mode disturbances reason
Filter circuit is set up on road, to rectification circuit, switching tube, high frequency transformer, direct current output, ground connection, screen
Cover accommodation；
D. test the Terminal Disturbance Voltage carrying out step A after the regulation of electrical circuit to verify dominant frequency part and
The allowance of his frequency increases；
E. electromagnetic radiation harassing and wrecking are tested；Tested utensil EUT is placed on the high insulating support of 0.8m,
Insulating support is placed in ground reference plane, it is provided that the power supply of EUT rated voltage connects, and sets and receives sky
Distance between line and EUT is 3m, is placed in by measurement antenna under horizontal and vertical polarization two states, then allows
Measurement antenna is placed on each different azimuth to be tested；
F. test result data is analyzed；Measurement antenna is placed in horizontal and vertical Polarimetric detection state
Under detection curve, peak value compares with standard limited value, to determine the frequency range that exceeds standard；Surpass from horizontal direction
Mark frequency range is defined as common-mode signal interference, and then drive circuit is carried out resistance adjustment；
G. drive circuit is adjusted laggard row carry out step E electromagnetic radiation harassing and wrecking test, to test
Card integrated curved meets standard-required, can complete.
Electromagnetic oven electromagnetic compatibility optimization method the most according to claim 1, it is characterised in that: described
In step A, V-type artificial mains network is symmetrical expression 50 Ω/(50 μ H5 Ω) artificial power net of two-wire V-type
Network.
Electromagnetic oven electromagnetic compatibility optimization method the most according to claim 2, it is characterised in that: institute
Stating the test voltage in step A is 230V/50Hz；Mode of operation is peak power mode of operation.
Electromagnetic oven electromagnetic compatibility optimization method the most according to claim 3, it is characterised in that: described
Peak power mode of operation power is 2000W.
Electromagnetic oven electromagnetic compatibility optimization method the most according to claim 3, it is characterised in that: institute
Stating the test voltage in step E is 230V/50Hz；Mode of operation is peak power mode of operation, and power is
2000W。
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| CN201610526275.8A CN106019023A (en) | 2016-07-05 | 2016-07-05 | Electromagnetic oven electromagnetic compatible optimization method |
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| CN201610526275.8A CN106019023A (en) | 2016-07-05 | 2016-07-05 | Electromagnetic oven electromagnetic compatible optimization method |
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Cited By (4)
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| CN109819641A (en) * | 2019-04-11 | 2019-05-28 | 太仓市同维电子有限公司 | Passive optical network multi-user unit radiation-emitting positions amelioration method |
| CN110456270A (en) * | 2019-08-09 | 2019-11-15 | 清华大学 | A kind of motor insulated on-line monitoring method and device |
| CN112083245A (en) * | 2020-09-09 | 2020-12-15 | 广州云从洪荒智能科技有限公司 | Target object electromagnetic radiation disturbance testing method, system, equipment and medium |
| CN112964955A (en) * | 2021-03-16 | 2021-06-15 | 云从科技集团股份有限公司 | Circuit testing method, system, electronic equipment and medium |
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Application publication date: 20161012 |