CN104316848A - Magnet ring coating withstand voltage detection method - Google Patents
Magnet ring coating withstand voltage detection method Download PDFInfo
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- CN104316848A CN104316848A CN201410483684.5A CN201410483684A CN104316848A CN 104316848 A CN104316848 A CN 104316848A CN 201410483684 A CN201410483684 A CN 201410483684A CN 104316848 A CN104316848 A CN 104316848A
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- magnet ring
- withstand voltage
- copper foil
- test
- pot tester
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Abstract
The invention discloses a magnet ring coating withstand voltage detection method comprising a step of selecting AC or DC as the output current on a withstand voltage tester and adjusting the values of test time, test voltage and leakage current, and a step of placing a coated magnet ring on a copper foil board, placing one probe of the withstand voltage tester on the inner circle of the magnet ring, electrically connecting the other probe of the withstand voltage tester with the copper foil board, and driving the magnet ring to roll on the copper foil board for one circle. By arranging the copper foil board and placing a to-be-detected magnet ring on the copper foil board to roll for one circle, the coating of the entire magnet ring can be detected without the need to damage the coating of the magnet ring, and magnet ring winding is not needed. Therefore, the speed of detection is accelerated, and the efficiency of detection is improved.
Description
Technical field
The present invention relates to manganese-zinc ferrite magnet ring and manufacture production field, particularly, relate to a kind of magnet ring coating resistance test method.
Background technology
At present, magnet ring product, in preparation process, has one coat operation.Namely resistant epoxy paint even application is surperficial at magnet ring, play the effect of insulation.This coating procedure general operation flow process is typesetting-preheating, and---spraying paint,---dry------spray paint turn-over---dry---inspection---finished product; In a lot of environment for use, all there is requirement of withstand voltage.
Conventional requirement of withstand voltage be under DC1500V voltage 1 second do not puncture.Testing tool is Hi-pot Tester.Traditional test methods has two kinds.
Individual layer voltage-withstand test (using at most): paint outside magnet ring is scratched, Hi-pot Tester earth terminal connects paint breakage, and high-pressure side is in magnetic core surface migration; Voltage resistant instrument is not reported to the police.The shortcoming of this method: 1) destructive testing, after test, product is waste product; 2) because be destructive testing, sample size is few, without representative.3) testing efficiency is low, and every test duration, from coating removal, approximately needs 15 minutes.
Double-deck voltage-withstand test: be wrapped in magnetic core both sides with iron wire and use Hi-pot Tester to carry out applied voltage test.
Shortcoming: the withstand voltage situation of coating can only testing winding position, does not have representativeness.Efficiency is low, and speed is slow.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose a kind of magnet ring coating resistance test method, to realize that detection efficiency is high, speed is fast and detect comprehensive advantage.
For achieving the above object, the technical solution used in the present invention is:
A kind of magnet ring coating resistance test method, is included on Hi-pot Tester and selects output current to be AC or DC, and adjusts the step of test duration, test voltage and leakage current numerical value respectively;
The magnet ring sprayed is placed on copper foil plate, Hi-pot Tester probe is put into magnet ring inner ring, another probe of Hi-pot Tester is electrically connected with copper foil plate, drive magnet ring rolls on copper foil plate one enclose step.
Preferably, described Hi-pot Tester detects the withstand voltage test voltage of individual layer is detect double-deck withstand voltage twice.
Technical scheme of the present invention has following beneficial effect:
Technical scheme of the present invention, by arranging the method for copper foil plate, is placed on a circle that copper foil plate rolls by magnet ring to be measured, do not needing, under the condition destroying magnet ring coating, to test to the coating of whole magnet ring, and need not magnet ring coiling again, accelerate detection speed, improve the efficiency of detection.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the magnet ring coating resistance test method flow diagram described in the embodiment of the present invention;
Fig. 2 specifically implements reference diagram for the magnet ring coating resistance test method described in the embodiment of the present invention.
By reference to the accompanying drawings, in the embodiment of the present invention, Reference numeral is as follows:
1-copper foil plate; 2-magnet ring; 3-probe.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Figure 1, a kind of magnet ring coating resistance test method, is included on Hi-pot Tester and selects output current to be AC or DC, and adjusts the step of test duration, test voltage and leakage current numerical value respectively;
The magnet ring sprayed is placed on copper foil plate, Hi-pot Tester probe is put into magnet ring inner ring, another probe of Hi-pot Tester is electrically connected with copper foil plate, drive magnet ring rolls on copper foil plate one enclose step.
Preferably, Hi-pot Tester detects the withstand voltage test voltage of individual layer is detect double-deck withstand voltage twice.
On Hi-pot Tester, wherein select output current to be AC or DC, adjust the test duration simultaneously respectively, (what check in this technical scheme is double-deck withstand voltage to test voltage, if customer requirement is that individual layer is withstand voltage, numerically 2 must be multiplied by customer requirement) and leakage current numerical value, set by customer requirement.
Test philosophy is: spray painting operation generally uses high-pressure spray gun, angledly above magnet ring after row's plate sprays, and is painted with one side and is coated with one side in addition again.Therefore the upper and lower surface paint of magnet ring is the thickest, and center, magnet ring inner and outer is due to process technology limit, and general paint can be thinner.Thickness can be had an appointment the difference of 0.1mm.Therefore test withstand voltage and need the position that test paint is the thinnest.Through long-term test result, demonstrate this phenomenon, the point of low voltage is all on the inner and outer round surface of magnet ring, and upper and lower surface does not have withstand voltage bad problem.
This method of testing, withstand voltage is double-deck withstand voltage, is placed on copper foil plate, the probe of Hi-pot Tester is put into magnet ring inner ring by magnet ring spray, and drive magnet ring rolls and one to enclose on copper foil plate.No matter inner side or outside, any one position paint partially thin cause withstand voltage bad, all can detect.
This method service advantages are as follows:
Bad recall rate 100%, because not being destructive test, can detect examination entirely.
Test speed is fast, and manual test, every test duration only needs 5 seconds.
Simple to operate, can design automation proving installation.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a magnet ring coating resistance test method, is characterized in that, is included on Hi-pot Tester and selects output current to be AC or DC, and adjusts the step of test duration, test voltage and leakage current numerical value respectively;
The magnet ring sprayed is placed on copper foil plate, Hi-pot Tester probe is put into magnet ring inner ring, another probe of Hi-pot Tester is electrically connected with copper foil plate, drive magnet ring rolls on copper foil plate one enclose step.
2. magnet ring coating resistance test method according to claim 1, is characterized in that, it is detect double-deck withstand voltage twice that described Hi-pot Tester detects the withstand voltage test voltage of individual layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410483684.5A CN104316848A (en) | 2014-09-22 | 2014-09-22 | Magnet ring coating withstand voltage detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410483684.5A CN104316848A (en) | 2014-09-22 | 2014-09-22 | Magnet ring coating withstand voltage detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104316848A true CN104316848A (en) | 2015-01-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410483684.5A Pending CN104316848A (en) | 2014-09-22 | 2014-09-22 | Magnet ring coating withstand voltage detection method |
Country Status (1)
| Country | Link |
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| CN (1) | CN104316848A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575926A (en) * | 2015-02-11 | 2015-04-29 | 海安县巨力磁材有限责任公司 | Corrosion-resistance radial heterogenous magnetic ring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2807423Y (en) * | 2005-07-15 | 2006-08-16 | 广州金升阳科技有限公司 | Ring-shaped magnetic core structure |
| CN202189115U (en) * | 2011-06-29 | 2012-04-11 | 刘中阳 | Portable frequency conversion induction high-voltage tester |
-
2014
- 2014-09-22 CN CN201410483684.5A patent/CN104316848A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2807423Y (en) * | 2005-07-15 | 2006-08-16 | 广州金升阳科技有限公司 | Ring-shaped magnetic core structure |
| CN202189115U (en) * | 2011-06-29 | 2012-04-11 | 刘中阳 | Portable frequency conversion induction high-voltage tester |
Non-Patent Citations (1)
| Title |
|---|
| 陈丽莉 等: "环型磁心涂层的耐压及检测方法", 《电力监测与故障诊断技术全书（二）变压器、电抗器、互感器卷（上）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575926A (en) * | 2015-02-11 | 2015-04-29 | 海安县巨力磁材有限责任公司 | Corrosion-resistance radial heterogenous magnetic ring |
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Application publication date: 20150128 |
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| RJ01 | Rejection of invention patent application after publication |