CN204374351U - A kind of Transformer Winding short-circuit detecting circuit - Google Patents
A kind of Transformer Winding short-circuit detecting circuit Download PDFInfo
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- CN204374351U CN204374351U CN201520086689.4U CN201520086689U CN204374351U CN 204374351 U CN204374351 U CN 204374351U CN 201520086689 U CN201520086689 U CN 201520086689U CN 204374351 U CN204374351 U CN 204374351U
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- 238000004804 winding Methods 0.000 title claims abstract description 51
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 abstract description 3
- 230000003534 oscillatory effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a kind of Transformer Winding short-circuit detecting circuit, comprises power circuit and testing circuit; It is characterized in that, described power circuit comprises transformer W, rectifier bridge T, electric capacity C1 and chip IC 1, and described testing circuit comprises diode D2, potentiometer RP2, chip IC 2 and voltage table A.The utility model Transformer Winding testing circuit structure is simple, components and parts are few, detected by the short-circuit conditions of oscillation frequency to Transformer Winding detecting LC oscillatory circuit, also can prepare to detect under powering-off state, can measure the short circuit in winding situation of the multiple transformers such as line output transformer, switch transformer, row driving transformer simply, exactly, the Transformer Winding short-circuit detecting device therefore using this circuit to make has that structure is simple, easy-to-operate, advantage applied widely.
Description
Technical field
The utility model relates to a kind of testing circuit, specifically the Transformer Winding short-circuit detecting circuit of simple, the easy-to-operate of a kind of structure.
Background technology
Transformer is one of equipment of most critical in electric system, and it carries voltage transformation, power distribution and transmission, and provides electrical power services.Therefore, the normal operation of transformer is the important guarantee to power system security, reliable, high-quality, economical operation, transformer is in Long-Time Service and the short circuit easily causing coil winding after suffering external force, thus affect the transformation performance of transformer, output voltage is caused to change, have a strong impact on the normal operation of load, if investigation can cause serious consequence not in time, the most complex structure of the existing device to Transformer Winding short-circuit detecting in the market, operation inconvenience, and the work that must be energized, easily cause electric shock accidents.
Utility model content
The purpose of this utility model is to provide that a kind of structure is simple, the Transformer Winding short-circuit detecting circuit of easy-to-operate, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of Transformer Winding short-circuit detecting circuit, comprise power circuit and testing circuit, described power circuit comprises transformer W, rectifier bridge T, electric capacity C1 and chip IC 1, and described testing circuit comprises diode D2, potentiometer RP2, chip IC 2 and voltage table A;
The two ends of the winding N1 of described transformer W connect the two ends of 220V line voltage respectively, one end connecting valve S1 of the winding N2 of transformer W, the other end of switch S 1 connects 1 port of rectifier bridge T, the other end of the winding N2 of transformer W connects 3 ports of rectifier bridge T, 2 ports of rectifier bridge T connect electric capacity C1, the negative electrode of diode D1 and 1 pin of chip IC 1, the other end of electric capacity C1 connects electric capacity C2, electric capacity C3, the anode of diode D1, 4 ports of rectifier bridge T, 1 pin of chip IC 2, voltage table A and winding L to be measured, 2 pins of chip IC 2 connect a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, 4 pins of chip IC 2 and 8 pins of chip IC 2, 3 pin ground connection of chip IC 1, another stiff end contact resistance R1 of potentiometer RP1, the other end contact resistance R2 of resistance R1, the anode of diode D2 and 7 pins of chip IC 2, the other end of resistance R2 connects the other end of electric capacity C2, the negative electrode of diode D2, 2 pins of chip IC 2 and 6 pins of chip IC 2, 5 pins of chip IC 2 connect the other end of electric capacity C3, the other end of chip IC 2 connects electric capacity C4, the other end of electric capacity C4 connects the other end of voltage table A and the other end of winding L to be measured.
As preferred version of the present utility model: described chip IC 1 is LM7805 type circuit of three-terminal voltage-stabilizing integrated, described chip IC 2 is 555 timer chips.
As preferred version of the present utility model: 220V voltage is become 9V voltage by winding N1 and N2 of described transformer W.
As preferred version of the present utility model: described electric capacity C4 is radioceramic chip capacitor.
Compared with prior art, the beneficial effects of the utility model are: the utility model Transformer Winding testing circuit structure is simple, components and parts are few, detected by the short-circuit conditions of oscillation frequency to Transformer Winding detecting LC oscillatory circuit, also can prepare to detect under powering-off state, can measure the short circuit in winding situation of the multiple transformers such as line output transformer, switch transformer, row driving transformer simply, exactly, the Transformer Winding short-circuit detecting device therefore using this circuit to make has that structure is simple, easy-to-operate, advantage applied widely.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of Transformer Winding short-circuit detecting circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of Transformer Winding short-circuit detecting circuit, comprise power circuit and testing circuit, described power circuit comprises transformer W, rectifier bridge T, electric capacity C1 and chip IC 1, and described testing circuit comprises diode D2, potentiometer RP2, chip IC 2 and voltage table A;
The two ends of the winding N1 of described transformer W connect the two ends of 220V line voltage respectively, one end connecting valve S1 of the winding N2 of transformer W, the other end of switch S 1 connects 1 port of rectifier bridge T, the other end of the winding N2 of transformer W connects 3 ports of rectifier bridge T, 2 ports of rectifier bridge T connect electric capacity C1, the negative electrode of diode D1 and 1 pin of chip IC 1, the other end of electric capacity C1 connects electric capacity C2, electric capacity C3, the anode of diode D1, 4 ports of rectifier bridge T, 1 pin of chip IC 2, voltage table A and winding L to be measured, 2 pins of chip IC 2 connect a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, 4 pins of chip IC 2 and 8 pins of chip IC 2, 3 pin ground connection of chip IC 1, another stiff end contact resistance R1 of potentiometer RP1, the other end contact resistance R2 of resistance R1, the anode of diode D2 and 7 pins of chip IC 2, the other end of resistance R2 connects the other end of electric capacity C2, the negative electrode of diode D2, 2 pins of chip IC 2 and 6 pins of chip IC 2, 5 pins of chip IC 2 connect the other end of electric capacity C3, the other end of chip IC 2 connects electric capacity C4, the other end of electric capacity C4 connects the other end of voltage table A and the other end of winding L to be measured.
Described chip IC 1 is LM7805 type circuit of three-terminal voltage-stabilizing integrated, and described chip IC 2 is 555 timer chips.
220V voltage is become 9V voltage by winding N1 and N2 of described transformer W.
Described electric capacity C4 is radioceramic chip capacitor.
Principle of work of the present utility model is: circuit access 220V line voltage, Closing Switch S1,220V alternating current is become 9V voltage by step-down transformer W, direct current is become by rectifier bridge T, then become stable 9V direct current by filter capacitor C1 and three section of voltage stabilizer IC1 to power to control circuit, time metering circuit zero load (namely winding L to be measured disconnects), the registration of A.C. voltmeter is about 1V, during measurement, by the winding L place in circuit to be measured of transformer, inductance L and the output coupling capacitor C4 of tested winding form LC series circuit.Regulator potentiometer RP1, when the frequency of the output square-wave pulse of 555 timers equals the natural frequency of LC series circuit, the registration of voltage table A is maximum.If the inductance value of winding L to be measured comparatively large (winding as line output transformer), when winding is without turn-to-turn short circuit.The registration of voltage table can reach 30V.If by the inductance value of test coil less (winding as row driving transformer), the maximum registration of voltage table is about 16V, and when being there is turn-to-turn short circuit by test coil, the Q value of coil significantly declines, at this moment the registration of voltage table can reduce greatly, represents Transformer Winding short circuit.Testing circuit is detected by the short-circuit conditions of oscillation frequency to Transformer Winding detecting LC oscillatory circuit, also can prepare to detect under powering-off state, can measure the short circuit in winding situation of the multiple transformers such as line output transformer, switch transformer, row driving transformer simply, exactly, the Transformer Winding short-circuit detecting device therefore using this circuit to make has that structure is simple, easy-to-operate, advantage applied widely.
Claims (4)
1. a Transformer Winding short-circuit detecting circuit, comprises power circuit and testing circuit; It is characterized in that, described power circuit comprises transformer W, rectifier bridge T, electric capacity C1 and chip IC 1, and described testing circuit comprises diode D2, potentiometer RP2, chip IC 2 and voltage table A;
The two ends of the winding N1 of described transformer W connect the two ends of 220V line voltage respectively, one end connecting valve S1 of the winding N2 of transformer W, the other end of switch S 1 connects 1 port of rectifier bridge T, the other end of the winding N2 of transformer W connects 3 ports of rectifier bridge T, 2 ports of rectifier bridge T connect electric capacity C1, the negative electrode of diode D1 and 1 pin of chip IC 1, the other end of electric capacity C1 connects electric capacity C2, electric capacity C3, the anode of diode D1, 4 ports of rectifier bridge T, 1 pin of chip IC 2, voltage table A and winding L to be measured, 2 pins of chip IC 2 connect a stiff end of potentiometer RP1, the sliding end of potentiometer RP1, 4 pins of chip IC 2 and 8 pins of chip IC 2, 3 pin ground connection of chip IC 1, another stiff end contact resistance R1 of potentiometer RP1, the other end contact resistance R2 of resistance R1, the anode of diode D2 and 7 pins of chip IC 2, the other end of resistance R2 connects the other end of electric capacity C2, the negative electrode of diode D2, 2 pins of chip IC 2 and 6 pins of chip IC 2, 5 pins of chip IC 2 connect the other end of electric capacity C3, the other end of chip IC 2 connects electric capacity C4, the other end of electric capacity C4 connects the other end of voltage table A and the other end of winding L to be measured.
2. a kind of Transformer Winding short-circuit detecting circuit according to claim 1, is characterized in that, described chip IC 1 is LM7805 type circuit of three-terminal voltage-stabilizing integrated, and described chip IC 2 is 555 timer chips.
3. a kind of Transformer Winding short-circuit detecting circuit according to claim 1, is characterized in that, 220V voltage is become 9V voltage by winding N1 and N2 of described transformer W.
4. a kind of Transformer Winding short-circuit detecting circuit according to claim 1, is characterized in that, described electric capacity C4 is radioceramic chip capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086689.4U CN204374351U (en) | 2015-01-29 | 2015-01-29 | A kind of Transformer Winding short-circuit detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086689.4U CN204374351U (en) | 2015-01-29 | 2015-01-29 | A kind of Transformer Winding short-circuit detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204374351U true CN204374351U (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520086689.4U Expired - Fee Related CN204374351U (en) | 2015-01-29 | 2015-01-29 | A kind of Transformer Winding short-circuit detecting circuit |
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| Country | Link |
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| CN (1) | CN204374351U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203906A (en) * | 2015-09-21 | 2015-12-30 | 吴建堂 | Coil interturn short-circuit tester |
| CN105527522A (en) * | 2016-01-14 | 2016-04-27 | 苏州成科自控设备有限公司 | Transformer detection device |
| 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 |
-
2015
- 2015-01-29 CN CN201520086689.4U patent/CN204374351U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203906A (en) * | 2015-09-21 | 2015-12-30 | 吴建堂 | Coil interturn short-circuit tester |
| CN105527522A (en) * | 2016-01-14 | 2016-04-27 | 苏州成科自控设备有限公司 | Transformer detection device |
| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20160129 |
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| EXPY | Termination of patent right or utility model |