CN105203906A - Coil interturn short-circuit tester - Google Patents
Coil interturn short-circuit tester Download PDFInfo
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- CN105203906A CN105203906A CN201510608879.2A CN201510608879A CN105203906A CN 105203906 A CN105203906 A CN 105203906A CN 201510608879 A CN201510608879 A CN 201510608879A CN 105203906 A CN105203906 A CN 105203906A
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Abstract
The invention provides a coil interturn short-circuit tester. The coil interturn short-circuit tester is characterized by comprising a 5V direct current power, a multivibrator and frequency adjustment circuit and an inductive coil test and alternating voltage indicating circuit; the multivibrator and frequency adjustment circuit is composed of a time-base circuit IC1, a resistor R1, a linearity potentiometer RP, a resistor R2, a switch diode D1 and a timing capacitor C1, and the time-base circuit IC1 adopts a type of NE555. By means of traditional simple methods, judgment on whether an interturn short-circuit exists in products such as inductive coils or not is not accurate, and specialized instruments are not prone to popularization. In order to solve the realistic problems, the coil interturn short-circuit tester which is practical, convenient and economical is provided according to the technical scheme.
Description
Technical field
The invention belongs to electronic technology and telefault field of measuring technique, is about a kind of coil turn-to-turn short circuit tester.
Background technology
The products such as various motor, stator, transformer, relay, A.C. contactor, telefault, do you how to judge its whether turn-to-turn short circuit? someone says can measuring resistance, but the actual resistance surveying short-circuited coil, its result and good coil resistance are almost similar, and coil resistance under normal circumstances how much has no way of detecting.
Certainly inductance measuring can be passed through, the inductance shelves inductance measuring that available secohmmeter or multimeter carry, as: the coil of inductance value compared with normal is much little, then can judge that turn-to-turn has short trouble; By measuring electric current, by test coil string alternating current ammeter or multimeter alternating current shelves, access specified alternating voltage, as: the coil of current value compared with normal is much larger, then judge that turn-to-turn has short circuit phenomenon.But the easy method of these tradition is directly perceived, also not accurate enough not, uses special instrument Meteorological too high and not easily popularizes.In order to solve these realistic problems, coil turn-to-turn short circuit tester of the present invention, its core parts adopts time base circuit (NE555), and it is a kind of practicality, convenience, economic technical scheme.
Below describe coil turn-to-turn short circuit tester of the present invention involved necessary, critical technology contents in implementation process in detail.
Summary of the invention
Goal of the invention and beneficial effect: how to judge whether the products such as various telefaults exist turn-to-turn short circuit, the inductance shelves inductance measuring that general available secohmmeter or multimeter carry, the coil as inductance value compared with normal is much little, then can judge that turn-to-turn has short trouble; Also by measuring electric current, by test coil incoming transport reometer or multimeter alternating current shelves, access specified alternating voltage, the coil as current value compared with normal is much larger, then judge that turn-to-turn has short circuit phenomenon.But the easy method of these tradition is not accurate enough, special instrument is used not easily to popularize again.In order to solve these realistic problems, coil turn-to-turn short circuit tester of the present invention is a kind of practicality, convenience, economic technical scheme.
Circuit working principle: coil turn-to-turn short circuit tester is connected into the multivibrator of frequency-adjustable by time base circuit IC1, frequency size is regulated by linear potentiometer RP, and pulsed frequency is about 100Hz.The timing capacitor C1 duration of charging determines primarily of the first half of resistance R1, linear potentiometer RP and resistance R2 and the time constant of timing capacitor C1, discharge time is then determined by the latter half of linear potentiometer RP, the time constant of resistance R2 and timing capacitor C1, and the 3rd pin of time base circuit IC1 exports square-wave pulse through coupling capacitance C2.Use and export square-wave pulse, and the telefault assembly such as various transformer, television line driving transformer can be measured quickly, exactly in conjunction with alternating voltage Table V and whether there is shorted-turn fault.
Technical characteristic: coil turn-to-turn short circuit tester, it comprises 5V direct supply, multivibrator and frequency adjustment circuit, telefault test and alternating voltage indicating circuit, it is characterized in that:
Multivibrator and frequency adjustment circuit: it is by time base circuit IC1, resistance R1, linear potentiometer RP, resistance R2, switching diode D1 and timing capacitor C1 composition, the model that time base circuit IC1 selects is NE555, 4th pin of time base circuit IC1 and the 8th pin connection circuit positive pole VCC, 7th pin of time base circuit IC1 connects the positive pole of switching diode D1 and the sliding end of linear potentiometer RP, one end of linear potentiometer RP is by resistance R1 connection circuit positive pole VCC, one end of the other end connecting resistance R2 of linear potentiometer RP, 2nd pin of time base circuit IC1 and the 6th pin connect the negative pole of switching diode D1 and the other end of resistance R2 and one end of timing capacitor C1, 1st pin of time base circuit IC1 and the other end connection circuit ground GND of timing capacitor C1,
Telefault test and alternating voltage indicating circuit: it is made up of coupling capacitance C2, alternating voltage Table V and tested telefault LX, alternating voltage Table V selects miniature 30V A.C. voltmeter, 3rd pin of time base circuit IC1 connects one end of alternating voltage Table V and one end of tested telefault LX by coupling capacitance C2, the other end of alternating voltage Table V and the other end connection circuit ground GND of tested telefault LX;
5V DC power anode is connected with circuit anode VCC, and 5V DC power cathode is connected with circuit ground GND.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit working schematic diagram of a coil turn-to-turn short circuit tester provided by the invention embodiment.
Embodiment
According to the coil turn-to-turn short circuit tester circuitry fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.
The technical parameter of components and parts and selection requirement thereof
IC1 is time base circuit, and model is NE555, and it is encapsulated as 8 pin DIP, each pin function: the 1st pin connection circuit ground GND; 2nd pin is trigger end; 3rd pin output terminal; 4th pin preset end; 5th pin is control voltage; 6th pin thresholding (threshold value); 7th pin is discharge end; 8th pin meets positive source VCC.
D1 is switching diode, and the model selected is 1N4148;
Resistance R1 is metalfilmresistor, and its resistance is 1.2K Ω, and resistance R2 is metalfilmresistor, and its resistance is 5.1K Ω;
RP is linear potentiometer, and its resistance is 6.2K Ω;
Electric capacity in circuit, the radioceramic chip capacitor that requirement selects high frequency characteristics good or thin-film capacitor, C1 is timing capacitor, and its capacity is 0.01 μ F/40V; C2 is coupling capacitance, and its capacity is 0.047 μ F/63V;
V is A.C. voltmeter, miniature 30V A.C. voltmeter can be selected, or use Miniature alternating-current voltage table repacking conventional in refrigerator delay valtage stabilizer, scrape off 100V, 200V, 300V tri-numerals rearmost " 0 " on former scale panel during repacking respectively, need in addition to change the 1N4007 silicon rectifier diode in original A.C. voltmeter into high-frequency rectification diode;
DC is 5V direct supply, can use 1A/5V D.C. regulated power supply or 1A/5V Switching Power Supply.
Circuit production main points, circuit debugging and using method
Because the circuit structure of coil turn-to-turn short circuit tester is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present invention does not substantially need to carry out debugging and can normally work;
It is in the plastic casing of 65 × 50 × 40mm that coil turn-to-turn short circuit tester circuitry is arranged on a volume; Change 1N4007 commutation diode original for A.C. voltmeter into high-frequency rectification diode, the alternating voltage of access 30V/50Hz, suitably reduces and adjusts former divider resistance resistance, pointer is referred on 30V scale mark.
Circuit components layout of the present invention, circuit structure design, its shape and size etc. thereof of outward appearance are not all gordian techniquies of the present invention; neither application claims protection technology contents; because not affecting specific implementation process of the present invention, therefore do not illustrate one by one in the description.
Using method
When coil turn-to-turn short circuit tester is unloaded: the reading of A.C. voltmeter is about 1V, is about 5Vpp with the square-wave pulse of oscilloscope measurement output terminal, linear adjustment potentiometer RP, makes the frequency of square-wave pulse change between 12.5 ~ 25KHz;
When coil turn-to-turn short circuit tester is tested, two output terminals of tester connect the two ends of tested telefault LX respectively, and tested telefault LX and output coupling capacitor C2 forms series circuit.Linear adjustment potentiometer RP, when the frequency exporting square-wave pulse equals the natural frequency of LC series circuit, the reading of A.C. voltmeter is maximum.If the inductance value of tested telefault is comparatively large, as: the inductance of " FBT " primary coil of colour television set is 3.26mH, and when winding is without turn-to-turn short circuit, alternating voltage Table V reading can reach 30V;
When tested telefault turn-to-turn exists short-circuit conditions, the Q value of telefault significantly declines, and at this moment the reading of alternating voltage Table V can reduce greatly.
To the explanation of testing result
For different telefaults, because the degree of coupling between telefault inductance value, Q value and winding is different, with coil turn-to-turn short circuit tester record parameter discrete larger.Comparatively large for line output transformer, switch transformer and this kind of inductance value of row driving transformer, adopt tightly coupled telefault between the high and telefault of Q value, can judge whether winding exists turn-to-turn short circuit simply, exactly.For the telefault adopting loose coupling between this kind of winding of line deflector coil, without line deflector coil and the inclined coil of row that there is turn-to-turn short circuit of turn-to-turn short circuit, only in detection at ordinary times by comparing, constantly accumulate experience, just can judge whether be there is shorted-turn fault by test coil more exactly.
Claims (1)
1. a coil turn-to-turn short circuit tester, it comprises 5V direct supply, multivibrator and frequency adjustment circuit, telefault test and alternating voltage indicating circuit, it is characterized in that:
Described multivibrator and frequency adjustment circuit are by time base circuit IC1, resistance R1, linear potentiometer RP, resistance R2, switching diode D1 and timing capacitor C1 composition, the model that time base circuit IC1 selects is NE555, 4th pin of time base circuit IC1 and the 8th pin connection circuit positive pole VCC, 7th pin of time base circuit IC1 connects the positive pole of switching diode D1 and the sliding end of linear potentiometer RP, one end of linear potentiometer RP is by resistance R1 connection circuit positive pole VCC, one end of the other end connecting resistance R2 of linear potentiometer RP, 2nd pin of time base circuit IC1 and the 6th pin connect the negative pole of switching diode D1 and the other end of resistance R2 and one end of timing capacitor C1, 1st pin of time base circuit IC1 and the other end connection circuit ground GND of timing capacitor C1,
Described telefault test and alternating voltage indicating circuit are made up of coupling capacitance C2, alternating voltage Table V and tested telefault LX, alternating voltage Table V selects miniature 30V A.C. voltmeter, 3rd pin of time base circuit IC1 connects one end of alternating voltage Table V and one end of tested telefault LX by coupling capacitance C2, the other end of alternating voltage Table V and the other end connection circuit ground GND of tested telefault LX;
Described 5V DC power anode is connected with circuit anode VCC, and 5V DC power cathode is connected with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608879.2A CN105203906A (en) | 2015-09-21 | 2015-09-21 | Coil interturn short-circuit tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608879.2A CN105203906A (en) | 2015-09-21 | 2015-09-21 | Coil interturn short-circuit tester |
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| Publication Number | Publication Date |
|---|---|
| CN105203906A true CN105203906A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510608879.2A Pending CN105203906A (en) | 2015-09-21 | 2015-09-21 | Coil interturn short-circuit tester |
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| Country | Link |
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| CN (1) | CN105203906A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940935A (en) * | 2019-12-13 | 2020-03-31 | 西安锐驰电器有限公司 | Transformer short circuit detection system and detection method |
| CN112858950A (en) * | 2021-01-21 | 2021-05-28 | 深圳市创新云网络科技有限公司 | Short circuit and open circuit detection method for anti-disassembly winding wire of touch screen |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2344782Y (en) * | 1998-10-23 | 1999-10-20 | 杨理柱 | Circuit fault detector |
| CN202256572U (en) * | 2011-06-08 | 2012-05-30 | 张新安 | FBT coil turn-to-turn short circuit tester |
| CN202649454U (en) * | 2012-06-25 | 2013-01-02 | 傅梨花 | Mutual inductor coil testing device |
| JP2013185889A (en) * | 2012-03-07 | 2013-09-19 | Denso Corp | Short circuit detection device |
| CN203324417U (en) * | 2013-05-21 | 2013-12-04 | 商丘市电业局永城分局 | Turn-to-turn short circuit tester of distribution transformer coil |
| CN204374351U (en) * | 2015-01-29 | 2015-06-03 | 国家电网公司 | A kind of Transformer Winding short-circuit detecting circuit |
| CN204964673U (en) * | 2015-09-21 | 2016-01-13 | 吴建堂 | Coil turn -to -turn short circuit tester |
-
2015
- 2015-09-21 CN CN201510608879.2A patent/CN105203906A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2344782Y (en) * | 1998-10-23 | 1999-10-20 | 杨理柱 | Circuit fault detector |
| CN202256572U (en) * | 2011-06-08 | 2012-05-30 | 张新安 | FBT coil turn-to-turn short circuit tester |
| JP2013185889A (en) * | 2012-03-07 | 2013-09-19 | Denso Corp | Short circuit detection device |
| CN202649454U (en) * | 2012-06-25 | 2013-01-02 | 傅梨花 | Mutual inductor coil testing device |
| CN203324417U (en) * | 2013-05-21 | 2013-12-04 | 商丘市电业局永城分局 | Turn-to-turn short circuit tester of distribution transformer coil |
| CN204374351U (en) * | 2015-01-29 | 2015-06-03 | 国家电网公司 | A kind of Transformer Winding short-circuit detecting circuit |
| CN204964673U (en) * | 2015-09-21 | 2016-01-13 | 吴建堂 | Coil turn -to -turn short circuit tester |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940935A (en) * | 2019-12-13 | 2020-03-31 | 西安锐驰电器有限公司 | Transformer short circuit detection system and detection method |
| CN112858950A (en) * | 2021-01-21 | 2021-05-28 | 深圳市创新云网络科技有限公司 | Short circuit and open circuit detection method for anti-disassembly winding wire of touch screen |
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Application publication date: 20151230 |