CN109596893A - A kind of high-frequency transformer coils the number of turns test method - Google Patents
A kind of high-frequency transformer coils the number of turns test method Download PDFInfo
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- CN109596893A CN109596893A CN201811421075.1A CN201811421075A CN109596893A CN 109596893 A CN109596893 A CN 109596893A CN 201811421075 A CN201811421075 A CN 201811421075A CN 109596893 A CN109596893 A CN 109596893A
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- 238000010998 test method Methods 0.000 title claims abstract 3
- 238000004804 winding Methods 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
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Abstract
The present invention provides a kind of high-frequency transformer coils the number of turns test method, belongs to high frequency transformer testing field.Following steps of the present invention: S1: the inductance of high-frequency transformer coils winding to be measured is obtained；S2: by non-damaging mode, the magnetic core of high frequency transformer to be measured is dismantled；S3: it finds one and loads onto magnetic core around a coil with the matched empty skeleton of magnetic core size, measure the coil windings inductance；S4: according to the step S3 coil turn obtained and the inductance of inductance and step S1, the number of turns of the coil windings coil inside high frequency transformer to be measured is obtained.The invention has the benefit that can achieve the lossless effect for measuring each coil-winding the number of turns of high frequency transformer, measuring accuracy is high, and method is simply at low cost.
Description
Technical Field
The invention relates to a high-frequency transformer testing method, in particular to a high-frequency transformer coil turn number testing method.
Background
The existing common method of the high-frequency transformer in the current power adapter, the charger and the LED drive is to measure the inductance of each winding by a digital bridge, then break the magnetic core of the transformer, remove the coil and the insulating tape for one circle and record the number.
The traditional test mode is long in time and can damage the transformer and the power supply, the high-frequency transformer cannot be restored after the line package is disassembled, and particularly when a customer only provides one high-frequency transformer sample, the only sample can be damaged and cannot be restored, and the function of reference comparison is lost.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for testing the number of turns of a high-frequency transformer coil.
The invention comprises the following steps:
s1: obtaining the inductance of a coil winding of a high-frequency transformer to be tested;
s2: disassembling a magnetic core of the high-frequency transformer to be tested in a non-damage mode;
s3: finding a hollow framework matched with the size of the magnetic core, winding a coil, installing the magnetic core, and measuring the inductance of a coil winding;
s4: and obtaining the number of turns of the coil in the coil winding in the high-frequency transformer to be tested according to the number of turns and the inductance obtained in the step S3 and the inductance obtained in the step S1.
The invention is further improved, in step S1, the number of coil windings of the high-frequency transformer to be tested is more than 2, and the method further comprises a step of obtaining a turn ratio: obtaining the inductance of each coil winding, and calculating a turn ratio according to the inductance of each winding, wherein the calculation formula of the turn ratio is as follows:wherein,in order to obtain the turn ratio of coil winding N1 to coil winding N2, L1 is the inductance of coil winding N1, and L2 is the inductance of coil winding N2.
Compared with the prior art, the invention has the beneficial effects that: the method solves the problem that the prior transformer has to be destructively disassembled after obtaining the detailed parameters of the transformer, can achieve the effect of nondestructively measuring the number of turns of each coil of the high-frequency transformer, and has the advantages of high measurement precision, simple method, low cost and wide application range.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
fig. 2 is a schematic diagram of a coil and a magnetic core of a high-frequency transformer according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention can rapidly measure the internal parameter specification of the high-frequency transformer without disassembling the original high-frequency transformer, and the error rate of the number of turns calculation is less than 2 percent. The effect is very ideal after repeated verification.
As shown in fig. 1, this example takes the measurement of 3 sets of coil windings of the high-frequency transformer to be measured in fig. 2 as an example, and the method steps of the present invention are explained in detail.
Step S1: and adjusting an LCR digital bridge tester (L: inductance, C: capacitance, R: resistance, the LCR digital bridge is the instrument capable of measuring inductance, capacitance, resistance and impedance) to a test inductance interface, setting the frequency at 50KHZ and the voltage at 0.3V, and then testing the inductance of the coil winding of the high-frequency transformer to be tested.
As shown in fig. 2, the high-frequency transformer to be tested in this example includes a magnetic core in the middle (two thickened vertical lines in the middle in fig. 2) and 3 sets of coil windings, which are respectively named as N1, N2 and N3, and the number of coil turns of the three coil windings is unknown.
After the inductance of each coil winding is measured, the turn ratio is calculated according to the inductance of each coil winding, and the calculation formula of the turn ratio is as follows:wherein,in order to obtain the turn ratio of coil winding N1 to coil winding N2, L1 is the inductance of coil winding N1, and L2 is the inductance of coil winding N2. Similarly, the turn ratio of the coil winding N2 to the winding with the number of turns N3 can also be obtained.
The inductance L1 of the coil winding N1 measured in this example is 1200 uH; inductance L2 ═ 5.3333uH of the coil winding N2; inductance L3 of coil winding N3 is 30.072 uH. Then, using the above formula, three coil turn ratios are calculated: N1/N2 is 15, N1/N3 is 6.25.
Step S2: the magnetic core is heated by electric blowing, hot air welding table and other modes, and the magnetic core of the high-frequency transformer is disassembled on the premise of not being damaged.
Step S3: a hollow framework matched with the size of the magnetic core is found, a coil winding of a coil with 100 turns is wound, the coil winding is named as N4, the number of turns of the coil winding N4 is known, the magnetic core is installed, and the coil inductance L of the coil winding N4 is 2133.33 uH.
Step S4: according to the calculation formula:in a clear view of the above, it is known that,
because inductance L1 of coil winding N1, inductance L4 of coil winding N4 and the number of turns of coil winding N4 are known, the number of turns of coil windings N1, N2 and N3 can be calculated conveniently and rapidly by using the formula, and the number of turns is respectively 75, 5 and 12.
The method solves the problem that the prior transformer has to be destructively disassembled after obtaining the detailed parameters of the transformer, can achieve the effect of nondestructively measuring the number of turns of each coil of the high-frequency transformer, and has the advantages of high measurement precision, simple method, low cost and wide application range.
The above-described embodiments are intended to be illustrative, and not restrictive, of the invention, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (2)
1. A high-frequency transformer coil turn number test method is characterized by comprising the following steps:
s1: obtaining the inductance of a coil winding of a high-frequency transformer to be tested;
s2: disassembling a magnetic core of the high-frequency transformer to be tested in a non-damage mode;
s3: finding a hollow framework matched with the size of the magnetic core, winding a coil, installing the magnetic core, and measuring the inductance of a coil winding;
s4: and obtaining the number of turns of the coil in the coil winding in the high-frequency transformer to be tested according to the number of turns and the inductance obtained in the step S3 and the inductance obtained in the step S1.
2. The high-frequency transformer coil turn number testing method according to claim 1, characterized in that: in step S1, the number of coil windings of the high-frequency transformer to be tested is more than 2, and the method further includes a turn ratio obtaining step: obtaining the inductance of each coil winding, and calculating a turn ratio according to the inductance of each winding, wherein the calculation formula of the turn ratio is as follows:wherein,in order to obtain the turn ratio of coil winding N1 to coil winding N2, L1 is the inductance of coil winding N1, and L2 is the inductance of coil winding N2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421075.1A CN109596893A (en) | 2018-11-27 | 2018-11-27 | A kind of high-frequency transformer coils the number of turns test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811421075.1A CN109596893A (en) | 2018-11-27 | 2018-11-27 | A kind of high-frequency transformer coils the number of turns test method |
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| CN109596893A true CN109596893A (en) | 2019-04-09 |
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| CN201811421075.1A Pending CN109596893A (en) | 2018-11-27 | 2018-11-27 | A kind of high-frequency transformer coils the number of turns test method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057872A (en) * | 2019-05-14 | 2019-07-26 | 重庆交通大学 | A kind of cable fracture of wire monitoring method based on detection self inductance effect inductance |
| CN110940702A (en) * | 2019-12-06 | 2020-03-31 | 陕西航空电气有限责任公司 | Insulation damage detection method in anodized aluminum foil winding process |
| CN114171315A (en) * | 2022-02-14 | 2022-03-11 | 上海隐冠半导体技术有限公司 | Inductance measuring system and method for coil winding and coil winding method |
| CN116359625A (en) * | 2023-04-03 | 2023-06-30 | 三变科技股份有限公司 | Production method of double-split transformer and method for detecting abnormal number of turns of high-voltage coil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235275A (en) * | 2013-04-25 | 2013-08-07 | 吴江龙硕金属制品有限公司 | Low-inductance annular magnetic core inductance sorting tool |
| CN108459212A (en) * | 2017-02-20 | 2018-08-28 | 武汉市欧睿科技有限公司 | Transformer voltage ratio group tester |
-
2018
- 2018-11-27 CN CN201811421075.1A patent/CN109596893A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235275A (en) * | 2013-04-25 | 2013-08-07 | 吴江龙硕金属制品有限公司 | Low-inductance annular magnetic core inductance sorting tool |
| CN108459212A (en) * | 2017-02-20 | 2018-08-28 | 武汉市欧睿科技有限公司 | Transformer voltage ratio group tester |
Non-Patent Citations (2)
| Title |
|---|
| 王年汉: ""松下RV645型DVD开关电源维修一例"", 《家电检修技术》 * |
| 高季荪: ""关于电感值的工程变通计算和测试法"", 《中国照明电器》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057872A (en) * | 2019-05-14 | 2019-07-26 | 重庆交通大学 | A kind of cable fracture of wire monitoring method based on detection self inductance effect inductance |
| CN110940702A (en) * | 2019-12-06 | 2020-03-31 | 陕西航空电气有限责任公司 | Insulation damage detection method in anodized aluminum foil winding process |
| CN114171315A (en) * | 2022-02-14 | 2022-03-11 | 上海隐冠半导体技术有限公司 | Inductance measuring system and method for coil winding and coil winding method |
| CN114171315B (en) * | 2022-02-14 | 2022-07-08 | 上海隐冠半导体技术有限公司 | Inductance measuring system and method for coil winding and coil winding method |
| CN116359625A (en) * | 2023-04-03 | 2023-06-30 | 三变科技股份有限公司 | Production method of double-split transformer and method for detecting abnormal number of turns of high-voltage coil |
| CN116359625B (en) * | 2023-04-03 | 2024-01-02 | 三变科技股份有限公司 | Production method of double-split transformer and method for detecting abnormal number of turns of high-voltage coil |
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