CN103076528B - Breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning - Google Patents
Breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning Download PDFInfo
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- CN103076528B CN103076528B CN201210579206.5A CN201210579206A CN103076528B CN 103076528 B CN103076528 B CN 103076528B CN 201210579206 A CN201210579206 A CN 201210579206A CN 103076528 B CN103076528 B CN 103076528B
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Abstract
The invention belongs to coil insulation resistance firing point location technology, relate to a kind of breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning.The both positive and negative polarity that the head of the present invention's two groups of enameled wires is connected on megohmmeter respectively ceaselessly tests insulation, the afterbody simultaneously holding two groups of enameled wires slowly returns coil, moving back the coil initial stage, insulation resistance is 0, along with coil is constantly backed off, two groups of enameled wires are separated, and cause firing point open circuit, insulation resistance rises to ∞, thus the firing point of edge resistance is locked in a less scope; Then the positive pole of megohmmeter is connected on the end of one group of enameled wire of coil, the negative pole of megohmmeter does the touching slip of reciprocation cycle slowly on locked enameled wire, megohmmeter ceaselessly tests insulation simultaneously, when the negative pole of megohmmeter is once touch the firing point of insulation resistance, megohmmeter pointer can put 0 place at once, thus accurate lock firing point.The present invention is simple to operate, and precision is high, has larger actual application value.
Description
Technical field
The invention belongs to coil insulation resistance firing point location technology, relate to a kind of breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning.
Background technology
For instruments such as speed probe, vibration transducer and transformers, the core of its induction test is coil.Can export two groups of test signals due to Double-wire parallel wound coil simultaneously and be transferred to different controllers, therefore it is widely used at instrument field.Namely Double-wire parallel wound coil is wound around two groups of enameled wires on same skeleton simultaneously, finally draws four wires and receives on connector.
But, in process of the test, often can there is insulation resistance conducting, cause occurring short circuit phenomenon between two groups of coils.Analyzed by investigation, can conclude be coil two groups of enameled wires between conducting, but accurately cannot locate firing point.Because enameled wire diameter only has 0.07mm, and coil turn reaches thousands of circle usually, several meters even enameled wire of ten several meters find micron-sized firing point to be tantamount to look for a needle in a haystack, and do not knowing in face of why conducting, how several queries such as conducting and firing point quantity, have to coil to be removed again be wound around, this brings hidden danger to later production efficiency and product reliability.Therefore, how to decompose coil, how accurately to locate enameled wire firing point, this problem for the conducting of analysis and solve intercoil insulation resistance is most important.
Summary of the invention
The object of the invention is: a kind of breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning is provided, thus accurately locate firing point fast, effectively improve reliability and the security of intercoil insulation.
Technical scheme of the present invention is: a kind of breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning, it comprises the steps:
Step 1: firing point preliminary latch
The coil of Double-wire parallel wound has four lead ends, i.e. the head and tail of two groups of enameled wires, wherein the head of two groups of enameled wires be connected on megohmmeter respectively positive and negative electrode on and ceaselessly test insulation, the afterbody simultaneously holding two groups of enameled wires slowly returns coil,
Moving back the coil initial stage, because the firing point of two groups of coils also connects together, insulation resistance is 0, along with coil is constantly backed off, two groups of enameled wires are separated, and cause firing point open circuit, insulation resistance rises to ∞, thus the firing point of insulation resistance is locked in a less scope;
Step 2: firing point is accurately determined
The positive pole of megohmmeter is connected on the end of one group of enameled wire of coil, the negative pole of megohmmeter does the touching slip of reciprocation cycle slowly on locked enameled wire, megohmmeter ceaselessly tests insulation simultaneously, because previous step insulation resistance rises to ∞, when the negative pole of megohmmeter is once touch the firing point of insulation resistance, megohmmeter pointer can put 0 place at once, thus accurate lock firing point.
On the positive and negative electrode that the head of two groups of enameled wires is connected on megohmmeter respectively and the speed of ceaselessly testing insulation is 120r/min.
Technique effect of the present invention is: breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning walks method of testing by " shaking while move back ", " shaking while sliding " two steps, quick and precisely locate breakover point of insulation resistance of bifilar parallel wound coil, it is simple to operate, efficiency is high, has larger actual application value.
Accompanying drawing explanation
Fig. 1 is enameled wire pass range of the present invention locking schematic diagram;
Fig. 2 is enameled wire firing point of the present invention locking schematic diagram,
Wherein, 1,2 two terminations representing one group of enameled wire; 3,4 two terminations that another organizes enameled wire are represented; 5 coils, 6 megohmmeters.
Embodiment
Below by specific embodiment, the present invention is described in detail:
The present invention adopts the testing tool that insulation resistance is conventional, with the Double-wire parallel wound coil of insulation resistance conducting for sample, is next divided into " two steps are walked " to decompose and locate the firing point of magnet wire insulation resistance.Walk method of testing by " shaking while move back ", " shaking while sliding " two steps, quick and precisely locate breakover point of insulation resistance of bifilar parallel wound coil.
Detailed process
Step 1
Refer to Fig. 1, adopt the way of " shaking while move back " to decompose coil, " shaking " refers to the speed of 120r/min shake megohmmeter test insulation resistance, and " moving back " refers to and return coil.Detailed process is, the coil of Double-wire parallel wound has four lead ends, the i.e. head and tail of two groups of enameled wires, wherein the head of two groups of enameled wires be connected on megohmmeter respectively both positive and negative polarity on and ceaselessly test insulation (namely ceaselessly shaking megohmmeter), while two groups of enameled wires afterbody slowly return coil.Moving back the coil initial stage, because the firing point of two groups of coils also connects together, insulation resistance is 0, and along with coil is constantly backed off, two groups of enameled wires are separated, and cause firing point open circuit, insulation resistance rises to ∞.Now, just the firing point of insulation resistance can be locked in a less scope (be specifically one in the scope of several coil girth).
Step 2
Refer to Fig. 2, adopt the method for " shake while sliding " to carry out the firing point of accurate lock insulation resistance, " shaking " still refers to and ceaselessly tests insulation resistance, and the test cap that " cunning " refers to megohmmeter does slowly on enameled wire back and forth touches slip.Detailed process is, the positive pole of megohmmeter is connected on the end of one group of enameled wire of coil, and the negative pole of megohmmeter does the touching slip of reciprocation cycle slowly on locked enameled wire, and megohmmeter ceaselessly tests insulation simultaneously.Because previous step insulation resistance rises to ∞, when the negative pole of megohmmeter is once touch the firing point of insulation resistance, megohmmeter pointer can put 0 place at once, now just can accurate lock firing point.
The present invention is with the Double-wire parallel wound coil of insulation resistance conducting for sample in sum, is next divided into " two steps are walked " to decompose and locate the firing point of magnet wire insulation resistance.Walk method of testing by " shaking while move back ", " shaking while sliding " two steps, quick and precisely locate breakover point of insulation resistance of bifilar parallel wound coil, for subsequent analysis and improvement provide Research foundation.
Claims (2)
1. a breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning, is characterized in that, comprises the steps:
Step 1: firing point preliminary latch
The coil of Double-wire parallel wound has four lead ends, i.e. the head and tail of two groups of enameled wires, wherein the head of two groups of enameled wires be connected on megohmmeter respectively positive and negative electrode on and ceaselessly test insulation, the afterbody simultaneously holding two groups of enameled wires slowly returns coil,
Moving back the coil initial stage, because the firing point of two groups of coils also connects together, insulation resistance is 0, along with coil is constantly backed off, two groups of enameled wires are separated, and cause firing point open circuit, insulation resistance rises to ∞, thus the firing point of insulation resistance is locked in a less scope;
Step 2: firing point is accurately determined
The positive pole of megohmmeter is connected on the end of one group of enameled wire of coil, the negative pole of megohmmeter does the touching slip of reciprocation cycle slowly on locked enameled wire, megohmmeter ceaselessly tests insulation simultaneously, because previous step insulation resistance rises to ∞, when the negative pole of megohmmeter is once touch the firing point of insulation resistance, megohmmeter pointer can put 0 place at once, thus accurate lock firing point.
2. breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning according to claim 1, is characterized in that, on the positive and negative electrode that the head of two groups of enameled wires is connected on megohmmeter respectively and the speed of ceaselessly testing insulation is 120r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579206.5A CN103076528B (en) | 2012-12-27 | 2012-12-27 | Breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210579206.5A CN103076528B (en) | 2012-12-27 | 2012-12-27 | Breakover point of insulation resistance of bifilar parallel wound coil method for rapidly positioning |
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| Publication Number | Publication Date |
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| CN103076528A CN103076528A (en) | 2013-05-01 |
| CN103076528B true CN103076528B (en) | 2015-11-11 |
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| CN106199325A (en) * | 2016-06-23 | 2016-12-07 | 安徽金帅洗衣机有限公司 | A kind of motor for washer coil measurement technique |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133925Y (en) * | 2007-09-19 | 2008-10-15 | 郑役军 | Turn-to-turn short circuit test device |
| CN101915885A (en) * | 2010-06-30 | 2010-12-15 | 上海电气电站设备有限公司 | Method for positioning intra-bundle short circuit of stator gelled coil |
| CN102360055A (en) * | 2011-10-13 | 2012-02-22 | 保定天威集团有限公司 | Paper insulation winding wire and paper covered transposed lead short circuit detection restoration method and device thereof |
| CN102707189A (en) * | 2012-05-31 | 2012-10-03 | 卧龙电气集团股份有限公司 | Method for determining short-circuit position of parallel-wound wires of transformer coil |
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2012
- 2012-12-27 CN CN201210579206.5A patent/CN103076528B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133925Y (en) * | 2007-09-19 | 2008-10-15 | 郑役军 | Turn-to-turn short circuit test device |
| CN101915885A (en) * | 2010-06-30 | 2010-12-15 | 上海电气电站设备有限公司 | Method for positioning intra-bundle short circuit of stator gelled coil |
| CN102360055A (en) * | 2011-10-13 | 2012-02-22 | 保定天威集团有限公司 | Paper insulation winding wire and paper covered transposed lead short circuit detection restoration method and device thereof |
| CN102707189A (en) * | 2012-05-31 | 2012-10-03 | 卧龙电气集团股份有限公司 | Method for determining short-circuit position of parallel-wound wires of transformer coil |
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