CN107677897A - A kind of high frequency transformer common-mode noise and conduct radiation method of testing - Google Patents
A kind of high frequency transformer common-mode noise and conduct radiation method of testing Download PDFInfo
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- CN107677897A CN107677897A CN201710691607.2A CN201710691607A CN107677897A CN 107677897 A CN107677897 A CN 107677897A CN 201710691607 A CN201710691607 A CN 201710691607A CN 107677897 A CN107677897 A CN 107677897A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/26—Measuring noise figure; Measuring signal-to-noise ratio
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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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- 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
- G01R31/01—Subjecting similar articles in turn to test, e.g. "go/no-go" tests in mass production; Testing objects at points as they pass through a testing station
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- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention discloses a kind of high frequency transformer common-mode noise and conduct radiation method of testing, prepare in advance with signal generator, two groups of passages of oscillograph and the connection line tool connected, only need transformer to be measured being inserted on connection line chart tool during test, just connection can quickly be formed, then signal is poured into by signal generator, this signal is monitored using one test pencil of oscillograph first passage frame, it is whether correct as confirmation input contrast signal, again with one test pencil monitoring coupled voltages VPP value of oscillograph second channel frame, judge voltage as test result, non-defective unit/defective products data in coupled voltages and database that finally oscillograph second channel is monitored are with reference to contrast, to judge whether the transformer of this test is non-defective unit.By signal generator, oscillograph progress coupled voltages measurement is employed, this method effectively considers the influence of the Potential distribution of transformer coli winding, winding construction mode and screen layer copper foil, so as to improve the accuracy of measurement.
Description
Technical field
The present invention relates to transformer Quality Detection art, refers in particular to a kind of high frequency transformer common-mode noise and conduction
Radiate method of testing.
Background technology
Transformer is the transfer element of magnetic energy in circuit, in circuit design, typically only considers its sensibility reciprocal, coefficient of coup etc.
Magnetic parameter characteristic and loss parameter.But in order to transformer in the case of more preferable research trends working condition, it is necessary to survey
Measure its dynamic characteristic.Between transformer primary secondary, only by physical arrangement parameters such as the insulation spacing between winding relative area and winding
The coupled capacitor of decision, referred to as structure capacitive.And winding Potential distribution influences when considering real transformer work, can react
Common-mode noise effective capacitance is referred to as to the electric capacity of common mode conducted noise inhibitory action when actual circuit works.Because transformer is around knot
Structure is complicated, may contain magnetic core, skeleton, winding, screen layer, insulating tape, barricade etc..When assessing its electromagnetic compatibility characteristic,
The size of its structure capacitive of conventional method general measure, the electromagnetism that the electric capacity is shown with transformer when actual circuit works
Very big difference be present in compatibility feature.
Traditional method using structure capacitive parameter between the former and deputy side winding of LCR measuring transformers, it is impossible to effectively reflect line
Enclose the influence of winding Potential distribution and screen layer to common-mode noise and conduct radiation.Transformer this respect quality pipe can not be ensured
The validity of control, can not timely and effectively it monitor, it is necessary to aptitude test after machine on client's plate, if the meeting of quality abnormal is to public affairs
Department and client bring immeasurable loss.
The content of the invention
In view of this, in view of the existing deficiencies of the prior art, its main purpose is to provide a kind of high frequency transformer to the present invention
Common-mode noise and conduct radiation method of testing, it carries out the assessment of coupled voltages measurement using signal generator, oscillograph, to sentence
Determine non-defective unit and defective products, not only cost is low for this method of testing, and easy and effective, can improve the accuracy of measurement.
To achieve the above object, the present invention is using following technical scheme：
A kind of high frequency transformer common-mode noise and conduct radiation method of testing, comprise the following steps
（1）Setup test device：Including ready signal generator, oscillograph first passage, oscillograph second channel and connecting line
Road tool, wherein, there are multiple binding posts on connection line tool：PIN 1, PIN 2, PIN 3, PIN 4, PIN 6 and PIN
FC、PIN FA、PIN FB；
（2）Wiring：
a）The "+" end of signal generator connects with PIN 4；
b）The "+" end of the "+" termination signal generator of oscillograph first passage, it is whether normal for monitoring input signal；Oscillography
The "+" termination PIN FB of device second channel are used for detecting transformer coupled voltage swing to be measured；
c）The "-" end of signal generator, the "-" end at the "-" end of oscillograph first passage and oscillograph second channel and PIN 1,
The short circuits of PIN 6 connect, series resistance between PIN FB and PIN 6,
（3）Prepare transformer to be measured：The agent structure of transformer to be measured includes primary assists winding, main coil, secondary windings,
Multiple pins are stretched out in the bottom of transformer body structure, including
Pin 1：Primary assists winding non-same polarity pin；
Pin 2：Primary assists winding Center tap pins；
Pin 3：Primary assists winding Same Name of Ends pin；
Pin 4：Main coil Same Name of Ends pin；
Pin A：Main coil Center tap pins；
Pin 6：Main coil non-same polarity pin；
Pin FA：Secondary center tap pin；
Pin FB：Secondary windings non-same polarity pin；
Pin FC：Secondary windings Same Name of Ends pin；
（4）Start to test：
a）The pin 1 of transformer to be measured wherein side is inserted into PIN 1, pin 2 inserts PIN 2, and pin 3 inserts PIN 3, pin
4 insertion PIN4, pin 6 insert PIN 6, pin FA insertion PIN FA, pin FB the insertion PIN FB of transformer opposite side, pin
FC insertion PIN FC；
Wherein, pin 1 and pin 6 cause primary assists winding non-same polarity and the short circuit of main coil non-same polarity, as oscillograph
Publicly (-) of first passage, oscillograph second channel and signal generator；
b）Signal generator pours into signal, while the one test pencil monitoring of oscillograph first passage frame from main winding Same Name of Ends pin 4
This signal, it is whether correct as confirmation input contrast signal；
c）Secondary windings Same Name of Ends pin FC is hanging, due to secondary windings non-same polarity pin FB and publicly indirect resistance, makes
One test pencil monitoring coupled voltages VPP value of oscillograph second channel frame, judges voltage as test result；
（5）Data analysis：It is used as coupled voltages by system test common-mode noise and conduct radiation data and tests reference standard, or
Opened a way defective products and non-defective unit sample by making transformer inner shield winding by oneself, it is corresponding with defective products to formulate its VPP with reference to non-defective unit
Bound test scope, with oscillograph second channel monomer transformer coupled voltages VPP values contrast, come judge non-defective unit with
Defective products.
As a kind of preferred scheme, the signal generator input condition：Triangular waveform, frequency 100KHz, voltage 20V.
As a kind of preferred scheme, series resistance value is 10K Europe between the PIN FB and PIN 6.
The present invention has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technical proposal
Understand, due to devising connection line tool, due to connection line tool in advance with signal generator, two groups of oscillograph
Passage（It is first passage and second channel）Connect, during test, it is only necessary to by the corresponding company of being inserted into of the pin of transformer to be measured
On the terminal of wiring diagram tool, connection just can be quickly formed, then, signal generator pours into signal, logical using oscillograph first
Frame one test pencil in road monitors this signal, as confirming whether input contrast signal is correct, then with one, oscillograph second channel frame
Test pencil monitors coupled voltages VPP values, judges voltage, finally, the coupling that oscillograph second channel is monitored as test result
Voltage and the non-defective unit in database/defective products data reference, contrast, to judge whether transformer of this test is non-defective unit.By
This, it is not necessary to aptitude test after machine on transformer plate, first test before machine on plate and dispatch from the factory again, ensure that product quality and
It is safe to use.In addition, this method has taken into full account the Potential distribution of transformer coli winding, winding construction mode and screen layer copper
The influence of paper tinsel, so as to improve the accuracy of measurement.Further, this method has only used signal generator, oscillograph first passage, shown
These simple and common equipment of ripple device second channel, connection line tool, just can reach test purpose, cost is low, user
Just, it is and easy and effective.
More clearly to illustrate the architectural feature and effect of the present invention, come below in conjunction with the accompanying drawings with specific embodiment to this hair
It is bright to be described in detail.
Brief description of the drawings
Fig. 1 is the measurement jig schematic diagram of embodiments of the present invention.
Fig. 2 is the schematic diagram of the transformer of embodiments of the present invention.
Accompanying drawing identifier declaration：
10th, signal generator 20, oscillograph first passage
30th, oscillograph second channel 40, connection line tool
50th, resistance 60, transformer to be measured
61st, primary assists winding 62, main coil
63rd, secondary windings.
Embodiment
It refer to shown in Fig. 1 and Fig. 2, that show the concrete structure of the preferred embodiments of the invention, is a kind of high frequency
Transformer common-mode noise and conduct radiation method of testing, common-mode noise CMN and conduct radiation EM for high frequency transformer
C is tested, the only pin of test transformer in itself during test, it is possible to know caused by transformer corresponding power complete machine itself
The size of common-mode noise and conduct radiation, the method for testing is by signal generator 10, oscillograph 20 and 30, connection line tool 40
Three parts form.It is used as coupled voltages by system test common-mode noise and conduct radiation data and tests reference standard, or passes through
Make transformer inner shield winding open circuit defective products and non-defective unit sample by oneself, with reference to non-defective unit and defective products formulate its VPP it is corresponding on
Lower limit test scope, the size of the common-mode noise of high frequency transformer and conduct radiation is judged by above equipment connecting test.
In practical application, as long as testing the VPP peak-to-peak values of transformer monomer, it is possible to judge the common-mode noise of power supply in itself substantially
And conduct radiation amplitude.
Specific testing procedure is as follows：
（1）Setup test device：Including ready signal generator 10, oscillograph first passage 20, the and of oscillograph second channel 30
Connection line tool 40, wherein, there are multiple binding posts on connection line tool 40：PIN 1、PIN 2、PIN 3、PIN 4、
PIN 6 and PIN FC, PIN FA, PIN FB.
（2）Wiring：
a）The "+" end of signal generator 10 connects with PIN 4；
b）The "+" end of the "+" termination signal generator 10 of oscillograph first passage 20, it is whether normal for monitoring input signal；
The "+" termination PIN FB of oscillograph second channel 30 are used for detecting the coupled voltages size of transformer 60 to be measured；
c）The "-" end at the "-" end of signal generator 10, the "-" end of oscillograph first passage 20 and oscillograph second channel 30 with
PIN 1, the short circuits of PIN 6 connect, series resistance 50 between PIN FB and PIN 6.
（3）Prepare transformer 60 to be measured：The agent structure of transformer 60 to be measured includes primary assists winding 61, main coil
62nd, secondary windings 63, multiple pins are stretched out in the bottom of transformer body structure, including
Pin 1：The primary non-same polarity pin of assists winding 61；
Pin 2：The primary Center tap pins of assists winding 61；
Pin 3：The primary Same Name of Ends pin of assists winding 61；
Pin 4：The Same Name of Ends pin of main coil 62；
Pin A：The Center tap pins of main coil 62；
Pin 6：The non-same polarity pin of main coil 62；
Pin FA：The Center tap pins of secondary windings 63；
Pin FB：The non-same polarity pin of secondary windings 63；
Pin FC：The Same Name of Ends pin of secondary windings 63.
（4）Start to test：
a）The pin 1 of transformer 60 to be measured wherein side is inserted into PIN 1, pin 2 inserts PIN 2, and pin 3 inserts PIN 3, drawn
Pin 4 inserts PIN4, and pin 6 inserts PIN 6, pin FA insertion PIN FA, pin FB the insertion PIN FB of transformer opposite side, drawn
Pin FC insertion PIN FC；
Wherein, pin 1 and pin 6 cause the primary non-same polarity of assists winding 61 and the short circuit of the non-same polarity of main coil 62, as showing
Publicly (-) of ripple device first passage 20, oscillograph second channel 30 and signal generator 10；
b）Signal generator 10 pours into signal, while oscillograph first passage 20 frame, one test pencil from main winding Same Name of Ends pin 4
This signal is monitored, it is whether correct as confirmation input contrast signal；
c）The Same Name of Ends pin FC of secondary windings 63 is hanging, due to the non-same polarity pin FB of secondary windings 63 and publicly indirect resistance
50, make 30 frame of oscillograph second channel, one test pencil monitoring coupled voltages VPP value, judge voltage as test result.
（5）Data analysis：It is used as coupled voltages test with reference to mark by system test common-mode noise and conduct radiation data
Standard, or by making transformer inner shield winding open circuit defective products and non-defective unit sample by oneself, its VP is formulated with reference to non-defective unit and defective products
The coupled voltages VPP values contrast of monomer transformer in bound test scope corresponding to P, with oscillograph second channel 30, to sentence
Determine non-defective unit and defective products.
Wherein, the input condition of signal generator 10：Triangular waveform, frequency 100KHz, voltage 20V.The PIN FB
The resistance of series resistance 50 is 10K Europe between PIN 6.
The operation principle of the present invention is as follows：Operating personnel can be selected transformer common mode radiation or conduct radiation as needed
One project testing.Because the present invention devises connection line tool 40, the connection line tool 40 has occurred with signal in advance
Device 10, oscillograph first passage 20, oscillograph second channel 30 connect, during test, it is only necessary to by the pin of transformer 60 to be measured
It is corresponding to be inserted on the terminal of connection line chart tool, connection just can be quickly formed, then, letter is poured into by signal generator 10
Number, this signal is monitored using oscillograph first passage 20 frame, one test pencil, it is whether correct as confirmation input contrast signal, then use
30 frame of oscillograph second channel, one test pencil monitoring coupled voltages VPP value, judges voltage, finally, by oscillography as test result
Non-defective unit/defective products data reference, contrast in coupled voltages and database that device second channel 30 monitors, to judge this survey
Whether the transformer of examination is non-defective unit.
It follows that the field coupling between transformer primary, vice-side winding by transformer Theory of Electromagnetic Field labor
Deeper mechanisms, and then employ a kind of assessment side that coupled voltages measurement is carried out using signal generator 10, oscillograph 20,30
Method.This method effectively considers the influence of the Potential distribution of transformer coli winding, winding construction mode and screen layer copper foil.
The validity and feasibility of this method are demonstrated in experiment and actual production, so as to the electromagnetic compatibility characteristic research for transformer
And the common mode electromagnetic compatibility characteristic quality control of transformer provides a kind of simple and effective assessment and test in batch production
Method.
The technological merit of the method for testing of the present invention is, before being power supply common-mode noise and conduct radiation final test
Highly reliably method of testing and means, the management and control for high frequency transformer quality have great importance for end offer one, energy
Enough produce larger economic interests.The improvement of Front-end Design stage transformer process debugging and later stage volume production product can effectively be helped
Quality supervision control provides effective test foundation.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore any subtle modifications, equivalent variations and modifications that every technical spirit according to the present invention is made to above example, still
Belong in the range of technical solution of the present invention.
Claims (3)
1. a kind of high frequency transformer common-mode noise and conduct radiation method of testing, it is characterised in that：Comprise the following steps
（1）Setup test device：Including ready signal generator（10）, oscillograph first passage（20）, oscillograph second channel
（30）With connection line tool（40）, wherein, there are multiple binding posts on connection line tool：PIN 1、PIN 2、PIN 3、
PIN 4, PIN 6 and PIN FC, PIN FA, PIN FB；
（2）Wiring：
a）Signal generator（10）"+" end connect with PIN 4；
b）Oscillograph first passage（20）"+" termination signal generator（10）"+" end, for whether just monitoring input signal
Often；Oscillograph second channel（30）"+" termination PIN FB be used for detecting transformer to be measured（60）Coupled voltages size；
c）Signal generator（10）"-" end, oscillograph first passage（20）"-" end and oscillograph second channel（30）'s
"-" end connects with PIN 1, the short circuits of PIN 6, series resistance between PIN FB and PIN 6（50）,
（3）Prepare transformer to be measured（60）：The agent structure of transformer to be measured includes primary assists winding（61）, main coil
（62）, secondary windings（63）, multiple pins are stretched out in the bottom of transformer body structure, including
Pin 1：Primary assists winding non-same polarity pin；
Pin 2：Primary assists winding Center tap pins；
Pin 3：Primary assists winding Same Name of Ends pin；
Pin 4：Main coil Same Name of Ends pin；
Pin A：Main coil Center tap pins；
Pin 6：Main coil non-same polarity pin；
Pin FA：Secondary center tap pin；
Pin FB：Secondary windings non-same polarity pin；
Pin FC：Secondary windings Same Name of Ends pin；
（4）Start to test：
a）By transformer to be measured（60）Wherein the pin 1 of side inserts PIN 1, and pin 2 inserts PIN 2, and pin 3 inserts PIN 3,
Pin 4 inserts PIN4, and pin 6 inserts PIN 6, pin FA insertion PIN FA, pin FB the insertion PIN FB of transformer opposite side,
Pin FC insertion PIN FC；
Wherein, pin 1 and pin 6 cause primary assists winding non-same polarity and the short circuit of main coil non-same polarity, as oscillograph
First passage (20), oscillograph second channel (30) and signal generator（10）Publicly；
b）Signal generator（10）Signal, while oscillograph first passage are poured into from main winding Same Name of Ends pin 4（20）One, frame
Whether test pencil monitors this signal, correct as confirmation input contrast signal；
c）Secondary windings Same Name of Ends pin FC is hanging, due to secondary windings non-same polarity pin FB and publicly indirect resistance
（50）, directly use oscillograph second channel（30）One test pencil monitoring coupled voltages VPP value of frame, judges electricity as test result
Pressure；
（5）Data analysis：It is used as coupled voltages by system test common-mode noise and conduct radiation data and tests reference standard, or
Opened a way defective products and non-defective unit sample by making transformer inner shield winding by oneself, it is corresponding with defective products to formulate its VPP with reference to non-defective unit
Bound test scope, with oscillograph second channel（30）On obtained coupled voltages VPP values contrast, to sentence this change to be measured
Whether depressor is non-defective unit.
2. a kind of high frequency transformer common-mode noise according to claim 1 and conduct radiation method of testing, it is characterised in that：
The signal generator（10）Input condition：Triangular waveform, frequency 100KHz, voltage 20V.
3. a kind of high frequency transformer common-mode noise according to claim 1 and conduct radiation method of testing, it is characterised in that：
Series resistance between the PIN FB and PIN 6（50）Resistance is 10K Europe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710691607.2A CN107677897A (en) | 2017-08-14 | 2017-08-14 | A kind of high frequency transformer common-mode noise and conduct radiation method of testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710691607.2A CN107677897A (en) | 2017-08-14 | 2017-08-14 | A kind of high frequency transformer common-mode noise and conduct radiation method of testing |
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| Publication Number | Publication Date |
|---|---|
| CN107677897A true CN107677897A (en) | 2018-02-09 |
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ID=61135234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710691607.2A Pending CN107677897A (en) | 2017-08-14 | 2017-08-14 | A kind of high frequency transformer common-mode noise and conduct radiation method of testing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324234A (en) * | 2018-11-16 | 2019-02-12 | 华勤通讯技术有限公司 | A kind of detection device, system and method |
| CN109342840A (en) * | 2018-11-16 | 2019-02-15 | 东莞市博展机械科技有限公司 | Common mode test fixture and common mode test method with stitch contact detection function |
| CN109459623A (en) * | 2018-11-16 | 2019-03-12 | 东莞市博展机械科技有限公司 | High frequency transformer common-mode noise digital detecting system |
-
2017
- 2017-08-14 CN CN201710691607.2A patent/CN107677897A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324234A (en) * | 2018-11-16 | 2019-02-12 | 华勤通讯技术有限公司 | A kind of detection device, system and method |
| CN109342840A (en) * | 2018-11-16 | 2019-02-15 | 东莞市博展机械科技有限公司 | Common mode test fixture and common mode test method with stitch contact detection function |
| CN109459623A (en) * | 2018-11-16 | 2019-03-12 | 东莞市博展机械科技有限公司 | High frequency transformer common-mode noise digital detecting system |
| CN109324234B (en) * | 2018-11-16 | 2024-02-13 | 华勤技术股份有限公司 | Detection device, system and method |
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Application publication date: 20180209 |
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