CN109799436A - Electromagnetic wire voltage-withstand test method and test device, conduction liquid - Google Patents
Electromagnetic wire voltage-withstand test method and test device, conduction liquid Download PDFInfo
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- CN109799436A CN109799436A CN201910185922.7A CN201910185922A CN109799436A CN 109799436 A CN109799436 A CN 109799436A CN 201910185922 A CN201910185922 A CN 201910185922A CN 109799436 A CN109799436 A CN 109799436A
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Abstract
The present invention provides a kind of electromagnetic wire voltage-withstand test method and test device, conduction liquid, which includes placing step and testing procedure, and electromagnetic wire includes conductor and insulating layer, and conductor is wrapped up outside insulating layer；Placing step includes that electric-magnetic wire sample is placed in conduction liquid, and respectively outside conduction liquid, conduction liquid includes water and glycine betaine for the electric connecting terminal of electric-magnetic wire sample and idle end, and the volume ratio of water and glycine betaine is 2:1~7:1；Testing procedure includes the voltage input end connection electromagnetic wire of voltage tester；It is powered by the voltage output end of voltage tester to conduction liquid, voltage tester obtains detection voltage；The test device includes insulating vessel, electric conductor, ultrasonic cleaning equipment and voltage tester, electric conductor and ultrasonic cleaning equipment are placed in insulating vessel, the voltage output end of voltage tester connects electric conductor, the voltage input end of voltage tester can accurately test electromagnetic wire pressure resistance performance for connecting electric-magnetic wire sample in all directions.
Description
Technical field
The present invention relates to insulating layer breakdown voltage testing equipment fields, are specifically related to a kind of electromagnetic wire voltage-withstand test method
And test device, conduction liquid.
Background technique
With electronics, the development of technical field of electricity, it is desirable that the electromagnetic wire in coil windings line used in each product
Standard and wish the quality reached also be constantly occurring variation.In order to adapt to its variation, for the electromagnetism after the completion of production
The insulating layer coating continuity and the corresponding proof voltage of insulating layer of line can requirement also more want harsh, thus in electromagnetic wire institute
In some electric performance test projects, the test for the dielectric strength that can accurately feed back its insulating layer is particularly important.
In existing electromagnetic wire processing technology, the conductor coated by insulating layer is drawing molding process, is frequently present of
The problems such as surface contamination, size fluctuation and metal burr, with current conventional machining techniques be all difficult 100% be avoided or
Removal, and these problems directly affect subsequent insulating layer coating continuity, so that insulating layer coating is uneven, so as to cause exhausted
The pressure-resistant performance of edge layer is bad.
On the other hand, in order to improve few dosage brought by the plot ratio of coil, low resistance, low-power consumption and improvement
Corresponding heat radiation and thermal resistance and other effects, such as have the abnormity such as flat electromagnetic wire, rectangular or square electromagnetic wire, hexagon electromagnetic wire
Electromagnetic wire, but influenced by typical round section electromagnetism line insulating layer paint-on technique, the paint-on technique of special-shaped wire section is not yet
Enough abilities guarantee the continuity and uniformity of insulating layer coating, such as rectangular or square wire rod is four in coating procedure
It is just difficult to be coated or be not coated at the connected angle in side at the connected angle in six sides of phenomenon or hexagon and is more difficult to guarantee it
The coating continuity of insulating layer and uniformity etc., these phenomenons all can cause insulating layer uneven, to directly result in electromagnetic wire
Pressure-resistant bad phenomenon.
The test method of existing insulating layer breakdown voltage includes metal ball method, metal cylinder method and twisting method etc..But
Be, due to electromagnetic wire by its processing technology and cross sectional shape are changed influence when, existing defects in existing test method
Position have problem be not allowed by test leakage or test value.
Referring to Fig. 1, metal cylinder method of testing are as follows: electric-magnetic wire sample 11 is wrapped in call through test voltage (test electrode)
On metal cylinder 14.The electric connecting terminal of electric-magnetic wire sample 11 removes insulating layer, exposes conductor, and conductor and connection have test voltage
Fixture 13 connect, the other end of sample 11 installs load drop-down additional, to prevent the relaxation of sample 11 and be unable to test.Metal cylinder
It 14 and connects the fixture 13 of another test voltage and is horizontally fixed on above fixed plate 12.In metal cylinder method of testing test process
In, if the section of sample 11 is circle, sample 11 can only also have the contact in a line or a face with metal cylinder, if
The section of sample 11 is special-shaped wire section, such as flat, rectangular or hexagon, also can only there are faces between metal cylinder
Contact range comprehensive can not also detect insulating layer pressure resistance performance or numerical value that wire rod complete cycle is enclosed.Further, Yi Xie electricity
Son, the pressure-resistant performance that some position may be only focused on after electrically turning to line coil with electromagnetic wire, and received by electromagnetic wire in production
The influence of lineal travel is entirely walked when line and coiling, wire rod can commutate or change therewith completely face, only survey a line or one at this time
The insulating layer pressure resistance performance in face equally exists the quality risk of test leakage or numerical value distortion.
Referring to fig. 2, the test method of metal ball method (stainless shot method) are as follows: using with metal ball 22 and test voltage
It is powered, one end removal insulating layer of sample 21 is connected into another test voltage and curves ' U ' type, and fills and is powered in metal ball 22
It is tested.Although this test method improves to some extent in the contact area of insulating layer, referring to Fig. 3, metal ball section is circle
Shape will necessarily generate certain spacing when contacting sample, these spacing will lead to the contact area between sample
It reduces and sample can not be covered all around.Further, metal ball is generally using being steel material, can be powered during the test with
Sample contacts, surface can accumulate certain dirt and influence conductive effect to influence voltage-withstand test in breakdown or use process
The result of numerical value.Further, the device for containing metal ball 22 is generally adopted by plastic cement cup body, there is regulation sample 21 in method
It is maintained a certain distance (≤5mm) with cup body wall surface, purpose does not contact and shadow also for guarantee sample 21 with insulation cup body
Metal ball 22 is rung with the contact surface of sample 21 to influence test result or numerical value, and then sample 21 is by 22 own wt of metal ball
And the influence of pressure, there are certain pliability (for example itself having certain softness after conductor annealing) again for itself, it is difficult to guarantee
It is not contacted with cup body wall surface and influences test result.
Referring to fig. 4, the test method of hinge method are as follows: be exactly to hang over 33 doubling of sample above device 32, remove electromagnetic wire
The insulating layer at the both ends of sample.Tension load is applied to sample 33 downward vertically by the subsequent guide wheel 4 of conical device 31, so
After rotate clockwise device 32, sample 33 is twisted into the line pair of twisted shape, wherein sample 33 can be applied according to different specifications
The tension load and twisting revolution added has different regulations, will cut, guarantees by the 33 doubling end of sample after the completion of regulation twisting
Separated distance and length after cutting prevent from forming the inaccuracy for being powered and causing result when test, then 33 both ends of sample
The conductor of exposing is respectively turned on test voltage (test electrode) to measure the pressure-resistant performance and numerical value of electromagnetism line insulating layer.The method
Be also part face or the contact of point property in electromagnetic wire twisting, can not comprehensive contact detection, and just in circular cross-section
Electromagnetic wire be more applicable in, and when political reform occurs for section, such as flat or square-section is then not suitable for applicable the method and carries out
Test.
In electromagnetic wire production process, to the damage of the insulating layer of electromagnetic wire when to adapt to tell coiling and by hand insertion
It is bad, after the insulating layer of electromagnetic wire is cured, one layer of lubricating oil is also coated in insulating layer outer surface, to guarantee that coil winding is completed
Insulation performance and quality afterwards.On the other hand, the electromagnetic wire finished product after insulated paint coats baking-curing is being wound up into spool
When upper, in order to guarantee that electromagnetic wire marshalling is smooth, most electromagnetic wire production firms can be applied receiving around preceding installation lubricating oil
Coating device guarantees its winding displacement exterior quality.Lubricating oil itself belongs to the oily matter of insulating properties, has stronger waterproofness,
When testing the breakdown voltage of electromagnetic wire, the breakdown voltage numerical value of actual test is the breakdown voltage number of one layer of lubricating oil and insulating layer
Value, rather than the only breakdown voltage numerical value of insulating layer, therefore cannot accurately feed back electromagnetic wire insulating layer pressure resistance performance and
Effect.
Summary of the invention
The first object of the present invention is to provide one kind and can be accurate and comprehensive tests out electromagnetism line insulating layer pressure resistance numerical value
Electromagnetic wire voltage-withstand test method.
The second object of the present invention is to provide one kind and can be accurate and comprehensive tests out electromagnetism line insulating layer pressure resistance numerical value
Electromagnetic wire pressure resistant testing device.
The third object of the present invention is to provide a kind of conduction liquid that can accurately test out electromagnetism line insulating layer pressure resistance numerical value.
In order to realize that the first above-mentioned purpose, electromagnetic wire voltage-withstand test method provided by the invention, test method include putting
Step and testing procedure are set, the electromagnetic wire includes conductor and insulating layer, and insulating layer wraps up conductor；
Placing step includes:
Electric-magnetic wire sample is placed in conduction liquid, the electric connecting terminal and idle end of electric-magnetic wire sample are respectively in conduction liquid
Outside, conduction liquid includes water and glycine betaine, and the volume ratio of water and glycine betaine is 2:1~7:1；
Testing procedure includes:
The voltage input end of voltage tester connects electromagnetic wire；
It is powered by the voltage output end of voltage tester to conduction liquid,
Voltage tester obtains detection voltage.
It can be seen that electric-magnetic wire sample to be tested is placed in conduction liquid, so that electric-magnetic wire sample is completely conductive
Liquid cladding, so that there is no spacing between the conduction liquid and electric-magnetic wire sample of connection voltage tester, it, can when being powered to conduction liquid
The breakdown voltage of the insulating layer of electromagnetic wire everywhere is accurately tested out, realizes the comprehensive voltage-withstand test to electric-magnetic wire sample；And
And conduction liquid includes water and glycine betaine, glycine betaine is soluble easily in water, and permeance property is good, and glycine betaine belongs to amophoteric surface active
Agent has stronger oil removing performance, the glycine betaine removal electromagnetic wire examination when electric-magnetic wire sample is placed in conduction liquid, in conduction liquid
The lubricating oil of sample outer surface, so that during the test, capableing of the pressure-resistant performance of insulating layer of the more acurrate test to electromagnetic wire.
Further embodiment is that electromagnetic wire voltage-withstand test method further includes ultrasonic wave placing between step and testing procedure
Decontamination step；
Ultrasonic wave decontamination step includes:
Electric-magnetic wire sample is decontaminated in conduction liquid by ultrasonic wave.
As it can be seen that the penetrability and cavitation shock wave when being propagated in conduction liquid by ultrasonic wave can cooperate conduction liquid to electromagnetism
The lubricating oil of line outer surface is removed and cleans, and more accurately can carry out voltage-withstand test by the insulating layer to electromagnetic wire.
Further embodiment is, the volume ratio inverse relationship of water and the glycine betaine in the insulating layer electromagnetic wire width
Spend the outer peripheral perimeter in the section in direction.
Further embodiment is to obtain benchmark perimeter value and the corresponding base volume ratio of benchmark perimeter value, confirmation insulation
When outer peripheral perimeter of the layer in the section in the width direction of electromagnetic wire is greater than benchmark perimeter value, the body of water and glycine betaine is adjusted
Product is than being less than base volume ratio.
As it can be seen that the volume ratio of water and glycine betaine is smaller, the concentration of glycine betaine is higher, and oil removing ability is stronger, can be directed to width
The bigger electromagnetic wire of the outer edge perimeter of insulating layer in section on direction.
To realize the second above-mentioned purpose, electromagnetic wire pressure resistant testing device provided by the invention includes: insulating vessel, conduction
Body, ultrasonic cleaning equipment and voltage tester, for insulating vessel for loading conduction liquid, conduction liquid includes water and glycine betaine, water
Volume ratio with glycine betaine is 2:1~7:1；Electric conductor is placed in insulating vessel, and the electric connecting terminal of electric conductor is located at conduction liquid
Outside；Ultrasonic cleaning equipment is arranged in insulating vessel, and conduction liquid covers ultrasonic cleaning equipment；The voltage of voltage tester is defeated
Outlet connects electric conductor, and the voltage input end of voltage tester is for connecting electric-magnetic wire sample.
It can be seen that electromagnetic wire to be tested is placed on equipped with the exhausted of conduction liquid by insulating vessel for placing conduction liquid
In edge container, so that conduction liquid coats electromagnetic wire to be tested completely, electric conductor is placed in insulating vessel, and voltage tester
Voltage output end connect electric conductor, the voltage input end of voltage tester connects electric-magnetic wire sample, and electric conductor is used for conduction
Liquid is powered so that voltage tester, electric conductor and electromagnetic wire form an electrical circuit in the conduction liquid medium, convenient for into
The test of the pressure-resistant performance of row electric-magnetic wire sample.
Further embodiment is that electric conductor is sieve, and plummer is provided on electric conductor, and plummer and ultrasonic cleaning fill
It is provided with spacing between setting, is provided with spacing between plummer and the inner wall of insulating vessel.
As it can be seen that electric-magnetic wire sample can be placed in the carrying of electric conductor when electric-magnetic wire sample to be placed in insulating vessel
On platform, and electric conductor is sieve, reduces the contact area between electric-magnetic wire sample and plummer, and plummer respectively with insulation
There are spacing between container, ultrasonic cleaning equipment, to also reduce electromagnetic wire and insulating vessel inner wall, ultrasonic cleaning equipment
Between contact area so that conduction liquid more completely touches electric-magnetic wire sample.
Further embodiment is that electromagnetic wire pressure resistant testing device includes fixation kit, and fixation kit includes conductive fixed station
And lower lock block, lower lock block is mobile towards conductive fixed station, and the voltage input end of voltage tester connects conductive fixed station.
As it can be seen that fixation kit is used to compress the electric connecting terminal of electromagnetic wire, convenient for by voltage tester, leading in test
Electric body and the electrical circuit that electric-magnetic wire sample is formed are more firm, can accurately test the breakdown voltage of electromagnetic wire.
Further embodiment is to be provided with screw thread tapping, screw thread tapping mating connection metal in setting on conductive fixed station
Screw.
As it can be seen that when metal screws are screwed towards screw thread tapping, it can be by the electricity between metal screws and screw thread tapping
The electric connecting terminal of magnet-wire compresses.
Further embodiment is that electric conductor includes that bottom plate, the first side plate, the second side plate and conductive connection plates, bottom plate are located at
Between first side plate and the second side plate, the bottom of bottom plate and insulating vessel is oppositely arranged, and the first side plate hangs down respectively with the second side plate
The extension end of the side of straight bottom of the connecting bottom board far from insulating vessel, the first side plate is stretched out outside conduction liquid, and conductive connection plates connect
The extension end of the first side plate is connect, conductive connection plates are erected on insulating vessel, and the voltage input end of voltage tester connects conductive
Connecting plate.
To realize above-mentioned third purpose, conduction liquid provided by the invention includes water and glycine betaine, the body of water and glycine betaine
Product is than being 2:1~7:1.
Detailed description of the invention
Fig. 1 is the test schematic diagram of metal cylinder method in background technique.
Fig. 2 is the test schematic diagram of metal ball method in background technique.
Fig. 3 is the enlarged drawing at Fig. 2A.
Fig. 4 is the test schematic diagram of twisting method in background technique.
Fig. 5 is the test schematic diagram of another angle of hinge method in background technique.
Fig. 6 is the test schematic diagram of electromagnetic wire pressure resistant testing device embodiment of the present invention.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Existing electromagnetic wire in process of production, is influenced by production technology, and the insulating layer of electromagnetic wire is unevenly distributed,
And pressure-resistant performance test methods in the prior art also can not comprehensive test electromagnetic wire insulating layer pressure-resistant performance, can not yet
Test obtains the most accurate pressure-resistant numerical value of the electromagnetism line insulating layer.Electromagnetic wire voltage-withstand test mode of the invention is suitable for any
A kind of electromagnetic wire of cross sectional shape, it can also be used to resin, glue, mica and its product, fibre, laminated product, plastic film
Meet the test of the breakdown voltage of the materials such as product, ceramics and glass.Electromagnetic wire in the present embodiment includes conductor and insulation
Layer, insulating layer wrap up conductor.
Electromagnetic wire voltage-withstand test method of the invention, test method include placing step, ultrasonic wave decontamination step and test
Step successively carries out placement step, ultrasonic wave decontamination step and testing procedure during the test.
Placing step includes:
Electric-magnetic wire sample is placed in conduction liquid, the electric connecting terminal and idle end of electric-magnetic wire sample are respectively in conduction liquid
Outside, conduction liquid includes water and glycine betaine, and the volume ratio of water and glycine betaine is 2:1~7:1, wherein preferably, water and glycine betaine
The optimal volume ratio 3:1 of volume ratio 2:1~5:1, water and glycine betaine.
When placing electric-magnetic wire sample, the electric connecting terminal of electric-magnetic wire sample can be removed about 2.5cm insulating layer, exposing is led
Body connect convenient for conductor with voltage tester.The idle end of electromagnetic wire can stay the length of about 10cm outside conduction liquid, prevent from testing
When electromagnetic wire broken end conductor leaky is generated by the air effect of relatively short distance, guarantee the accuracy of test result, electricity
The remainder of magnet-wire should be all placed in conduction liquid.
Electromagnetic wire voltage-withstand test method further includes ultrasonic wave decontamination step placing between step and testing procedure.
Ultrasonic wave decontamination step includes:
Electric-magnetic wire sample is decontaminated in conduction liquid by ultrasonic wave.
Testing procedure includes:
The voltage input end of voltage tester connects electromagnetic wire；
It is powered by the voltage output end of voltage tester to conduction liquid；
Voltage tester obtains detection voltage, and the detection voltage of acquisition is breakdown voltage.
Electric-magnetic wire sample to be tested is placed in conduction liquid, so that electromagnetic wire is coated by conduction liquid completely, so that leading
It is electro-hydraulic there is no spacing between electric-magnetic wire sample, the breakdown voltage of the insulating layer of electromagnetic wire everywhere can be accurately tested out, and
Conduction liquid includes water and glycine betaine, and glycine betaine is soluble easily in water, and permeance property is good, and glycine betaine belongs to amphoteric surfactant,
There is stronger oil removing performance, when electric-magnetic wire sample is placed in conduction liquid, the glycine betaine in conduction liquid removes electric-magnetic wire sample
The lubricating oil of outer surface, so that during the test, can accurately test the pressure-resistant performance of the insulating layer of electromagnetic wire.By super
Penetrability when sound wave is propagated in conduction liquid and cavitation shock wave can cooperate conduction liquid to the lubricating oil of electromagnetic wire outer surface into
Row removal and cleaning more accurately can carry out voltage-withstand test by the insulating layer to electromagnetic wire.
The volume ratio inverse relationship of water and glycine betaine is in insulating layer in the outer peripheral of the section of the width direction of electromagnetic wire
Perimeter obtains benchmark perimeter value and the corresponding base volume ratio of benchmark perimeter value in the present embodiment, confirms insulating layer in electricity
When the outer peripheral perimeter in the section in the width direction of magnet-wire is greater than benchmark perimeter value, the volume ratio for adjusting water and glycine betaine is small
In base volume ratio.First electromagnetic wire of one section of certain length is taken, insulating layer in the section of the first electromagnetic wire in the width direction
With a thickness of 0.004mm, in the conduction liquid of corresponding first electromagnetic wire, the volume ratio of water and glycine betaine can be 3:1.It is another when taking
When kind cross sectional shape the second electromagnetic wire identical with the cross sectional shape of the first electromagnetic wire is tested, in two kinds of electromagnetic wires
Under the area of section of conductor is identical, the insulating layer of the second electromagnetic wire with a thickness of 0.0057mm, it is opposite with the first electromagnetic wire, second
The thickness of insulating layer of electromagnetic wire increases, and the outer edge perimeter of insulating layer is with respect to first in the section of the second electromagnetic wire in the width direction
The outer edge perimeter of insulating layer increased in the section in the width direction of electromagnetic wire, the lubrication coated in insulating layer outer surface
Oil coating range also increases, at this point, the volume ratio of water and glycine betaine should reduce in the corresponding conduction liquid of the second electromagnetic wire, so that
The concentration of glycine betaine increases, and increases the oil removing ability of conduction liquid.
Different electric-magnetic wire samples is tested below
Comparative experiments group 1
In this group of comparative experiments group, the section of electric-magnetic wire sample is circular cross-section, and the conductor diameter of electromagnetic wire is
0.06mm ± 0.003mm, after applying insulating layer coating, the maximum outside diameter of electric-magnetic wire sample is 0.081mm；Minimum insulation thickness degree
0.004mm coats 180 grades of polyurethane (UEW/180) of insulating layer model.During the test, use frequency for 50HZ~
60HZ sinusoidal waveform alternating voltage tests breakdown voltage with the rate of rise of 20~100V/s, and the detection electric current of insulation breakdown is set
It is set to 2~5mA, test carries out at room temperature.
Comparative example group 1
In comparative example group 1 include four groups of comparative examples, wherein respectively metal cylinder method, metal ball method, twisting method and with
The test group that water is tested as conducting liquid, wherein in using water as the comparative example of conducting liquid, water be deionized water (i.e.
The chloride ion in water removal is removed).
Embodiment group 1:
Embodiment group 1 includes 7 groups of embodiments, and it is 1:1~7:1 that 1 group of embodiment, which respectively corresponds water and the volume ratio of glycine betaine,
Comparative example group is identical as the test environment that embodiment group carries out, and contrast test data are referring to table one:
Table one:
As seen from the above table, the test result in relative contrast's example group 1, embodiment group 1, which is better able to accurately test, obtains electricity
The pressure-resistant performance of magnet-wire sample, and as the volume ratio of glycine betaine and water gradually decreases, the concentration of glycine betaine reduces, conduction liquid
Oil removing ability is also declined, and deviation occurs in the breakdown voltage numerical value tested.
Comparative experiments group 2
Electric-magnetic wire sample uses width section for flat pattern, and the conductor width of electromagnetic wire is 1.00mm ± 0.005mm,
With a thickness of 0.13mm ± 0.005mm；After the completion of insulating layer coating, the maximum outside diameter of electromagnetic wire is width 1.043mm, thickness
0.168mm；Minimum insulation thickness degree wide 0.027mm, thickness 0.027mm；Painting insulating layer coating type is 180 grades of polyurethane (UEW/
180)。
Comparative example group 2
Comparative example group 2 includes 2 groups of comparative examples, respectively uses metal ball method and is tested using water as conducting liquid
Test group, wherein water is deionized water (removing the chloride ion in water removal) in using water as the comparative example of conducting liquid.
Embodiment group 2
Embodiment group 1 includes 7 groups of embodiments, and it is 1:1~7:1 that 1 group of embodiment, which respectively corresponds water and the volume ratio of glycine betaine,
Comparative example group is identical as the test environment that embodiment group carries out, and contrast test data are referring to table two:
Table two
It as seen from the above table, is being in flat electric-magnetic wire sample for cross sectional shape, relative contrast's example organizes the test in 2
As a result, embodiment group 2, which is better able to accurately test, obtains the pressure-resistant performance of electric-magnetic wire sample, and with the body of glycine betaine and water
Product ratio gradually decreases, and the concentration of glycine betaine reduces, and conduction liquid oil removing ability is also declined, the breakdown voltage numerical value tested
There is deviation.
Compare implementation group 3
Electric-magnetic wire sample is square shape using width section, and conductor width 0.21mm ± 0.005mm of electromagnetic wire is thick
Spend 0.21mm ± 0.005mm；After the completion of insulating layer coating, the maximum outside diameter width of electromagnetic wire is 0.260mm, with a thickness of
0.260mm；Minimum insulation thickness degree wide 0.045mm, thickness 0.045mm；Applying insulating layer coating type is that 200 grades of polyamide acyls are sub-
Amine (AIW/200).
Comparative example group 3
Comparative example group 3 includes two groups of comparative examples, and metal ball method is respectively adopted and is tested using water as conducting liquid
Test group, wherein in using water as the comparative example of conducting liquid, water is deionized water (removing the chloride ion in water removal).
Embodiment group 3
Embodiment group 3 includes 7 groups of embodiments, and it is 1:1~7:1 that 1 group of embodiment, which respectively corresponds water and the volume ratio of glycine betaine,
Comparative example group is identical as the test environment that embodiment group carries out, and contrast test data are referring to table three:
Table three
It as seen from the above table, is being in rectangular electric-magnetic wire sample for cross sectional shape, relative contrast's example organizes the test knot in 3
Fruit, embodiment group 3, which is better able to accurately test, obtains the pressure-resistant performance of electric-magnetic wire sample, and with the volume of glycine betaine and water
Than gradually decreasing, the concentration of glycine betaine is reduced, and conduction liquid oil removing ability is also declined, and the breakdown voltage numerical value tested goes out
Existing deviation.
Conduction liquid of the invention includes water and glycine betaine, and the volume ratio of water and glycine betaine is 2:1~7:1, wherein it is preferred that
The optimal volume ratio 3:1 of volume ratio 2:1~5:1 of ground, water and glycine betaine, water and glycine betaine.
Referring to Fig. 6, electromagnetic wire pressure resistant testing device of the invention includes insulating vessel 41, electric conductor 42, ultrasonic cleaning
The bottom of insulating vessel 41 is arranged in device 43 and voltage tester, ultrasonic cleaning equipment 43, and insulating vessel 41 is for loading
Conduction liquid 46, electric conductor 42 are placed in insulating vessel 41, and electric conductor 42 is used to be powered to the conduction liquid 46 in insulating vessel 41.
In the present embodiment, the electric connecting terminal of electric conductor 42 is located at outside conduction liquid 46, and conduction liquid 46 covers ultrasonic cleaning equipment 43.
The voltage output end of voltage tester connects electric conductor 42, and the voltage input end of voltage tester is for connecting electric-magnetic wire sample
45.Electric-magnetic wire sample 45 to be tested is placed in the insulating vessel 41 equipped with conduction liquid 46, wherein the electricity of electric-magnetic wire sample 5
Connecting pin 452 and unloaded section 451 are respectively at outside conduction liquid 46, so that conduction liquid 46 is completed to coat electric-magnetic wire sample to be tested
45, electric conductor 42 is placed in insulating vessel 41, and the voltage output end of voltage tester connects electric conductor 42, voltage tester
Voltage input end connect electric-magnetic wire sample 45, electric conductor 42 is for being powered to conduction liquid 46, so that voltage tester, leading
Electric body 42 and electric-magnetic wire sample 45 form an electrical circuit in the medium of conduction liquid 46, are convenient for the resistance to of electric-magnetic wire sample 45
Press the test of performance.
In the present embodiment, electric conductor 42 is sieve, and plummer 420, plummer 420 and ultrasound are provided on electric conductor 42
It is provided with spacing between wave cleaning device 43, is provided with spacing between plummer 420 and the inner wall of insulating vessel 41.Electromagnetic wire examination
Sample 45 is placed on the plummer 420 of electric conductor 42, and in the present embodiment, electric conductor 42 is sieve, reduces electric-magnetic wire sample 45
With the contact area between plummer 420, and plummer 420 is respectively between insulating vessel 41, ultrasonic cleaning equipment 43
There are spacing, to also reduce the contact surface between electric-magnetic wire sample 45 and 41 inner wall of insulating vessel, ultrasonic cleaning equipment 43
Product, so that conduction liquid 46 more completely touches electric-magnetic wire sample 45.In the present embodiment, electric conductor 42 includes bottom plate 421, the
Side plate 422, the second side plate 423 and conductive connection plates 424, bottom plate 421 between the first side plate 422 and the second side plate 423,
Bottom plate 421 and the bottom of insulating vessel 41 are oppositely arranged, and the first side plate 422 and the second side plate 423 are respectively perpendicular connecting bottom board 421
The side of bottom far from insulating vessel 41.In the present embodiment, 423 shape of bottom plate 421, the first side plate 422 and the second side plate
At plummer 420, the bottom of insulating vessel 41, the bottom of bottom plate 421 and insulating vessel 41 is arranged in ultrasonic cleaning equipment 43
It is oppositely arranged, the spacing between bottom plate 421 and ultrasonic cleaning equipment 43 may be configured as 5cm.First side plate 422, the second side plate
423 and the inner wall of insulating vessel 41 be arranged in parallel, between the first side plate 422, the second side plate 423 and the inner wall of insulating vessel 41
Spacing may be alternatively provided as 5cm.
Ultrasonic cleaning equipment 43 includes supersonic generator and ultrasonic transducer, and super refreshing wave producer issues high frequency
Oscillator signal is converted into high frequency machinery oscillation two by ultrasonic transducer and travels in conduction liquid 46, and ultrasonic wave is in cleaning solution
Middle forward directed radiation.
The extension end of first side plate 422 is stretched out outside conduction liquid 46, and conductive connection plates 424 connect the stretching of the first side plate 422
End, conductive connection plates 424 are erected on insulating vessel 41, and the voltage input end of voltage tester connects conductive connection plates 424, just
It is powered in voltage tester to electric conductor 42.Electric conductor 42 further includes insulation connecting plate 425, the stretching of the second side plate 423
End is stretched out outside conduction liquid 46, and insulation connecting plate 425 connects the extension end of the second side plate 423, and insulation connecting plate 425 is erected at insulation
On container 41.The connector that second side plate 423 is erected on insulating vessel 41 is also electrically conductive.
Electromagnetic wire pressure resistant testing device includes fixation kit 44, and fixation kit 44 includes conductive fixed station 441 and lower lock block
442, lower lock block 442 is mobile towards conductive fixed station 441, and the voltage input end of voltage tester connects conductive fixed station 441.Gu
Component 44 is determined for compressing the electric connecting terminal of electric-magnetic wire sample 45, is convenient in test, by voltage tester, electric conductor 42
The electrical circuit formed with electric-magnetic wire sample 45 is more firm, can accurately test the breakdown voltage of electric-magnetic wire sample 45.In this implementation
In example, screw thread tapping, screw thread tapping mating connection metal screws 442, when metal screws 442 are provided on conductive fixed station 441
It, can be by the electric connecting terminal of the electric-magnetic wire sample 45 between metal screws 442 and screw thread tapping when being screwed towards screw thread tapping
It compresses, in the present embodiment, metal screws 442 are compact heap 442.
Finally it is emphasized that the above description is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is right
For those skilled in the art, the present invention can have various change and change, all within the spirits and principles of the present invention,
Any modification, equivalent substitution, improvement and etc. done, should all be included in the protection scope of the present invention.
Claims (10)
1. electromagnetic wire voltage-withstand test method, it is characterised in that: the test method includes placing step and testing procedure, the electricity
Magnet-wire includes conductor and insulating layer, and the insulating layer wraps up the conductor；
The placement step includes:
The electromagnetic wire is placed in conduction liquid, the electric connecting terminal and idle end of the electromagnetic wire are respectively in the conduction liquid
Outside, the conduction liquid includes water and glycine betaine, and the volume ratio of the water and the glycine betaine is 2:1~7:1；
The testing procedure includes:
The voltage input end of voltage tester connects the electromagnetic wire；
It is powered by the voltage output end of the voltage tester to the conduction liquid；
The voltage tester obtains detection voltage.
2. electromagnetic wire voltage-withstand test method according to claim 1, it is characterised in that:
The electromagnetic wire voltage-withstand test method further includes ultrasonic wave decontamination step between the placement step and the testing procedure
Suddenly；
The ultrasonic wave decontamination step includes:
The electromagnetic wire is decontaminated in the conduction liquid by ultrasonic wave.
3. electromagnetic wire voltage-withstand test method according to claim 1 or 2, it is characterised in that:
The volume ratio inverse relationship of the water and the glycine betaine is in the insulating layer in the width direction of the electromagnetic wire
The outer peripheral perimeter in section.
4. electromagnetic wire voltage-withstand test method according to claim 3, it is characterised in that:
Benchmark perimeter value and the corresponding base volume ratio of the benchmark perimeter value are obtained, confirms the insulating layer in the electromagnetism
When the outer peripheral perimeter in the section in the width direction of line is greater than the benchmark perimeter value, the water and the glycine betaine are adjusted
Volume ratio be less than the base volume ratio.
5. electromagnetic wire pressure resistant testing device characterized by comprising
Insulating vessel, for the insulating vessel for loading conduction liquid, the conduction liquid includes water and glycine betaine, the water and described
The volume ratio of glycine betaine is 2:1~7:1；
Electric conductor, the electric conductor are placed in the insulating vessel, and the electric connecting terminal of the electric conductor is located at the conduction liquid
Outside；
Ultrasonic cleaning equipment, the ultrasonic cleaning equipment are arranged in the insulating vessel, described in the conduction liquid covering
Ultrasonic cleaning equipment；
The voltage output end of voltage tester, the voltage tester connects the electric conductor, the voltage of the voltage tester
Input terminal is for connecting the electromagnetic wire.
6. electromagnetic wire pressure resistant testing device according to claim 5, it is characterised in that:
The electric conductor is sieve, and plummer, the plummer and the ultrasonic cleaning equipment are provided on the electric conductor
Between be provided with spacing, be provided with spacing between the plummer and the inner wall of the insulating vessel.
7. electromagnetic wire pressure resistant testing device according to claim 5, it is characterised in that:
The electromagnetic wire pressure resistant testing device includes fixation kit, and the fixation kit includes conductive fixed station and lower lock block, institute
It is mobile towards the conductive fixed station to state lower lock block, the voltage input end of the voltage tester connects the conductive fixed station.
8. electromagnetic wire pressure resistant testing device according to claim 7, it is characterised in that:
Screw thread tapping, the screw thread tapping mating connection metal screws are provided on the conduction fixed station.
9. according to the described in any item electromagnetic wire pressure resistant testing devices of claim 5 to 8, it is characterised in that:
The electric conductor includes bottom plate, the first side plate, the second side plate and conductive connection plates, and the bottom plate is located at first side plate
Between second side plate, the bottom of the bottom plate and the insulating vessel is oppositely arranged, first side plate and described the
Two side plates are respectively perpendicular the side for connecting the bottom of the bottom plate far from the insulating vessel, and the extension end of first side plate is stretched
Out outside the conduction liquid, the conductive connection plates connect the extension end of first side plate, and the conductive connection plates are erected at institute
It states on insulating vessel, the voltage input end of the voltage tester connects the conductive connection plates.
10. conduction liquid, it is characterised in that: the conduction liquid includes water and glycine betaine, the volume ratio of the water and the glycine betaine
For 2:1~7:1.
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