CN104330651A - Screening device for high-frequency transformer magnetic core and method thereof - Google Patents
Screening device for high-frequency transformer magnetic core and method thereof Download PDFInfo
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- CN104330651A CN104330651A CN201410519316.1A CN201410519316A CN104330651A CN 104330651 A CN104330651 A CN 104330651A CN 201410519316 A CN201410519316 A CN 201410519316A CN 104330651 A CN104330651 A CN 104330651A
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Abstract
The invention relates to the technical field of transformer magnetic core testing, and discloses a screening device for a high-frequency transformer magnetic core and a method thereof. The device adopted by the method comprises a first power field effect transistor V1, a second power field effect transistor V2 and a tested push-pull transformer T1. The drain electrode of the first power field effect transistor V1 is connected with the primary winding PS1 of the tested push-pull transformer T1, the source electrode is connected with the common ground, and the gate electrode is connected with a drive input signal. The drain electrode of the second power field effect transistor V2 is connected with the primary winding PS2 of the tested push-pull transformer T1, the source electrode is connected with the common ground and the gate electrode is connected with the drive input signal. The center tap PS3 of the T1 is connected with input voltage. Disqualified transformer magnetic cores are screened out before the transformer magnetic core is wound into the transformer so that yield rate of the transformer is enhanced.
Description
Technical field
The present invention relates to magnetic core of transformer technical field of measurement and test, particularly relate to a kind of screening plant and method of high frequency transformer magnetic core.
Background technology
Transformer is the critical component in power supply, is also vitals, and the height of its reliability also directly determines the reliability index of power supply.Magnetic core is as the important component part of transformer, and the height of its performance directly determines the performance index of transformer, such as no-load transformer electric current, load capacity etc.Therefore be necessary to reject in early days before coiling transformer the magnetic core of transformer that can not meet the demands, improve the yield rate of transformer, effectively save processing cost and the time of transformer, thus improve the quality of power supply.
Summary of the invention
In order to underproof high-tension transformer magnetic core can be filtered out, the invention provides a kind of screening plant and method of high frequency transformer magnetic core, before magnetic core of transformer turns to transformer, filter out underproof magnetic core of transformer, improve the yield rate of transformer.
In order to realize the object solved the problems of the technologies described above, present invention employs following technical scheme:
A kind of high frequency transformer magnetic core screening plant, comprises the first power field effect pipe V1, the second power field effect pipe V2, tested push-pull transformer T1; Wherein the drain electrode of the first power field effect pipe V1 connects the PS1 of tested push-pull transformer T1 former limit winding, and source electrode connects publicly, and grid connects drive input signal; The drain electrode of the second power field effect pipe V2 connects the PS2 of tested push-pull transformer T1 former limit winding, and source electrode connects publicly, and grid connects drive input signal; T1 center tap PS3 connects input voltage.
A kind of high frequency transformer magnetic core screening technique,
1) before magnetic core turns to transformer, magnetic core is carried out to the test of no-load current, after input voltage powers up, the electric current that tested push-pull transformer T1 center tap flows through equals the electric current that tested push-pull transformer T1 former limit winding PS1, PS2 flow through, and namely no-load current adds transformer secondary winding reflected current;
2) identical according to the turn ratio of every transformer, secondary vice-side winding load current is also identical, so secondary secondary reflected current also should be substantially identical; Therefore, the difference of the electric current that tested push-pull transformer T1 center tap flows through, should be caused by no-load transformer electric current difference, and by testing electric current on tested push-pull transformer T1 center tap, namely the no-load current of transformer filters out underproof transformer; When the no-load current of magnetic core exceedes the scope that qualified transformer limits, filter out underproof magnetic core of transformer.
By adopting technique scheme, the present invention has following superiority:
A kind of screening plant of high frequency transformer magnetic core and method, obtain in conjunction with the operating circuit of transformer reality and test of many times, can effectively filter out underproof magnetic core before magnetic core of transformer turns to transformer, and the screening of this screening technique is easy, improves the qualification rate of transformer.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the screening plant of high frequency transformer magnetic core.
In figure, V1-first power field effect pipe, V2-second power field effect pipe, T1-is tested transformer, and PS1-is the former limit winding of tested transformer T1, and PS2-is the former limit winding of tested transformer T1, and PS3-is the center tap of tested transformer T1.
Embodiment
Below in conjunction with accompanying drawing, further explanation is explained to this patent.But the protection domain of this patent is not limited to concrete embodiment.
Below by accompanying drawing, explanation is further explained to this patent.
Using the transformer of same magnetic material, due to the height of core flux density, the difference of magnetic field intensity and magnetization current and core-loss current in magnetic core can be caused, thus making the size of no-load transformer electric current also different; The difference of magnetic core manufacturing process in addition, such as, magnetic core band coiling tight, the neat degree of magnetic core end face, whether magnetic core is impaired, transformer core-loss current also can be made different, thus the size of no-load current is also different;
Whether transformer winding technique is reasonable, and such as coiling tightness degree, turn-to-turn distance, grade that layer insulation is withstand voltage also can affect the size of no-load current.Therefore the difference of magnetic core of transformer, no-load transformer size of current can be caused different, and the magnetic core input current made is beyond required value; And whether technique for coiling holds water and also can affect the size of no-load current;
Transformer imput current is that no-load current is with vice-side winding reflected current sum.Because the turn ratio of every transformer is identical, secondary vice-side winding load current is also identical, so secondary secondary reflected current also should be substantially identical.Therefore, the difference of transformer imput current, should be caused by no-load transformer electric current difference, and no-load current is an important performance indexes of transformer, and it contains magnetization current and the core-loss current of transformer, is the vector sum of magnetization current and core-loss current.It is the important indicator weighing transformer quality.
The no-load current of transformer needs to control in certain claimed range for this reason, and during transformer screening, reply no-load current makes specific requirement.Simultaneously, magnetic core is as one of the important component part of transformer, and in conjunction with the practical condition of transformer, need before magnetic core turns to transformer, magnetic core is carried out to the test of no-load current, the no-load current of magnetic core is limited in certain scope, filter out underproof magnetic core, improve the qualification rate of transformer, thus improve the quality of high-voltage power supply.
A kind of high frequency high voltage transformer cores measunng device, mainly comprises the first power field effect pipe V1, the second power field effect pipe V2, tested push-pull transformer T1 forms; Wherein the drain electrode of the first power field effect pipe V1 meets the PS1 of tested push-pull transformer T1 former limit winding, and source electrode connects publicly, and grid connects drive input signal; The drain electrode of the second power field effect pipe V2 meets the PS2 of tested push-pull transformer T1 former limit winding, and source electrode connects publicly, and grid connects drive input signal; T1 center tap PS3 connects input voltage.
A kind of high frequency transformer magnetic core screening technique, utilizes the high frequency high voltage transformer cores measunng device circuit screening that transformer imput current is arranged with vice-side winding reflected current sum principle for no-load current;
After input voltage powers up, the electric current that tested push-pull transformer T1 center tap flows through equals electric current that tested push-pull transformer T1 former limit winding PS1, PS2 flow through and no-load current adds transformer secondary winding reflected current.Because the turn ratio of every transformer is identical, secondary vice-side winding load current is also identical, so secondary secondary reflected current also should be substantially identical.Therefore, the difference of the electric current that tested push-pull transformer T1 center tap flows through, should be caused by no-load transformer electric current difference, filters out underproof transformer by the no-load current testing electric current and transformer on tested push-pull transformer T1 center tap.
The no-load current of transformer comprises magnetization current and the core-loss current of transformer, and wherein core-loss current is determined primarily of the magnetic core performance of transformer.Magnetic core is as one of the important component part of transformer, and in conjunction with the practical condition of transformer, need before magnetic core turns to transformer, coiling armature winding on magnetic core, magnetic core of transformer is carried out to the test of no-load current, the no-load current of magnetic core is limited in certain scope, filter out underproof magnetic core, improve the qualification rate of transformer, thus improve the quality of high-voltage power supply.
Claims (2)
1. a high frequency transformer magnetic core screening plant, is characterized in that: comprise the first power field effect pipe V1, the second power field effect pipe V2, tested push-pull transformer T1; Wherein the drain electrode of the first power field effect pipe V1 connects the PS1 of tested push-pull transformer T1 former limit winding, and source electrode connects publicly, and grid connects drive input signal; The drain electrode of the second power field effect pipe V2 connects the PS2 of tested push-pull transformer T1 former limit winding, and source electrode connects publicly, and grid connects drive input signal; T1 center tap PS3 connects input voltage.
2. a high frequency transformer magnetic core screening technique, is characterized in that: its step is as follows:
1) before magnetic core turns to transformer, magnetic core is carried out to the test of no-load current, after input voltage powers up, the electric current that tested push-pull transformer T1 center tap flows through equals the electric current that tested push-pull transformer T1 former limit winding PS1, PS2 flow through, and namely no-load current adds transformer secondary winding reflected current;
2) identical according to the turn ratio of every transformer, secondary vice-side winding load current is also identical, so secondary secondary reflected current also should be substantially identical; Therefore, the difference of the electric current that tested push-pull transformer T1 center tap flows through, should be caused by no-load transformer electric current difference, and by testing electric current on tested push-pull transformer T1 center tap, namely the no-load current of transformer filters out underproof transformer; When the no-load current of magnetic core exceedes the scope that qualified transformer limits, filter out underproof magnetic core of transformer.
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| CN201410519316.1A CN104330651B (en) | 2014-09-30 | 2014-09-30 | A kind of screening plant and method of high frequency transformer magnetic core |
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| CN201410519316.1A CN104330651B (en) | 2014-09-30 | 2014-09-30 | A kind of screening plant and method of high frequency transformer magnetic core |
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| CN104330651B CN104330651B (en) | 2018-09-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935667A (en) * | 2016-05-31 | 2016-09-14 | 广西电网有限责任公司电力科学研究院 | Quick sorting method for current transformer iron cores |
| CN107228984A (en) * | 2017-05-16 | 2017-10-03 | 浦北县富通电子科技有限公司 | The Incoming Quality Control method of magnetic core |
| CN113405446A (en) * | 2021-05-11 | 2021-09-17 | 联合汽车电子有限公司 | Method and device for detecting gap of magnetic core of transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001319815A (en) * | 2000-05-08 | 2001-11-16 | Sumitomo Electric Ind Ltd | Signal input and output device |
| WO2013010385A1 (en) * | 2011-07-18 | 2013-01-24 | 广州金升阳科技有限公司 | Self-excited push-pull converter |
| CN103091588A (en) * | 2013-01-24 | 2013-05-08 | 无锡市普天铁心有限公司 | Transformer iron core test winding wire device |
| CN203660873U (en) * | 2013-09-30 | 2014-06-18 | 洛阳隆盛科技有限责任公司 | Circuit for eliminating low-frequency oscillation of output ripples of high-voltage power supply |
| CN203759147U (en) * | 2013-12-26 | 2014-08-06 | 山东泰开变压器有限公司 | Detection and determination apparatus of transformer performance parameters |
| CN204166062U (en) * | 2014-09-30 | 2015-02-18 | 洛阳隆盛科技有限责任公司 | A kind of screening plant of high frequency transformer magnetic core |
-
2014
- 2014-09-30 CN CN201410519316.1A patent/CN104330651B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001319815A (en) * | 2000-05-08 | 2001-11-16 | Sumitomo Electric Ind Ltd | Signal input and output device |
| WO2013010385A1 (en) * | 2011-07-18 | 2013-01-24 | 广州金升阳科技有限公司 | Self-excited push-pull converter |
| CN103091588A (en) * | 2013-01-24 | 2013-05-08 | 无锡市普天铁心有限公司 | Transformer iron core test winding wire device |
| CN203660873U (en) * | 2013-09-30 | 2014-06-18 | 洛阳隆盛科技有限责任公司 | Circuit for eliminating low-frequency oscillation of output ripples of high-voltage power supply |
| CN203759147U (en) * | 2013-12-26 | 2014-08-06 | 山东泰开变压器有限公司 | Detection and determination apparatus of transformer performance parameters |
| CN204166062U (en) * | 2014-09-30 | 2015-02-18 | 洛阳隆盛科技有限责任公司 | A kind of screening plant of high frequency transformer magnetic core |
Non-Patent Citations (1)
| Title |
|---|
| 陈毓昌等: "变压器空载电流和空载损耗超标的解决措施", 《变压器》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935667A (en) * | 2016-05-31 | 2016-09-14 | 广西电网有限责任公司电力科学研究院 | Quick sorting method for current transformer iron cores |
| CN105935667B (en) * | 2016-05-31 | 2018-04-10 | 广西电网有限责任公司电力科学研究院 | A kind of quick method for separating of current transformer core |
| CN107228984A (en) * | 2017-05-16 | 2017-10-03 | 浦北县富通电子科技有限公司 | The Incoming Quality Control method of magnetic core |
| CN113405446A (en) * | 2021-05-11 | 2021-09-17 | 联合汽车电子有限公司 | Method and device for detecting gap of magnetic core of transformer |
| CN113405446B (en) * | 2021-05-11 | 2023-08-08 | 联合汽车电子有限公司 | Method and device for detecting gap of magnetic core of transformer |
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| CN104330651B (en) | 2018-09-21 |
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