CN202948050U - Alarm device of abnormal transformer current - Google Patents
Alarm device of abnormal transformer current Download PDFInfo
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- CN202948050U CN202948050U CN 201220643894 CN201220643894U CN202948050U CN 202948050 U CN202948050 U CN 202948050U CN 201220643894 CN201220643894 CN 201220643894 CN 201220643894 U CN201220643894 U CN 201220643894U CN 202948050 U CN202948050 U CN 202948050U
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Abstract
The utility model relates to the technical field of transformers and particularly relates to an alarm device of abnormal transformer current. The alarm device of the abnormal transformer current comprises a mutual inductor for sampling current signals of a secondary coil of a transformer, an auxiliary transformer for collecting voltage signals at the output end of the transformer, a rectification circuit for rectifying the current signals sampled by the mutual inductor from the transformer and the voltage signals collected by the auxiliary transformer from the transformer, a filter circuit for filtering the rectified current signals, a voltage stabilizing circuit for stabilizing the voltage signals, a comparison circuit for comparing the filtered current signals with a set value and transmitting a comparing result to an alarm circuit and the alarm circuit for responding an alarm result transmitted by the comparison circuit. When the transformer current is abnormal, the alarm circuit gives an alarm, and the alarm device of the abnormal transformer current detect faults conveniently and rapidly, improves working efficiency, and avoids great influences on normal operation of a device.
Description
Technical field
The utility model relates to the transformer technology field, is specifically related to the transformer current anomaly alarming device.
Background technology
Transformer is one of device crucial in electronic equipment, is also the higher link of failure rate in electronic equipment, and its normal operation is the important guarantee of electronic equipments safety, reliability service.But at present, the current anomaly alarm free device of electronic equipment to transformer, after the electric current of transformer occurs extremely, might directly cause the operation paralysis of whole electronic equipment, but because transformer does not have independent warning device, thereby need to carry out trouble shooting to whole equipment, reduce work efficiency, bring considerable influence for the normal operation of equipment.
Summary of the invention
The purpose of this utility model is to overcome shortcoming of the prior art, and the transformer current anomaly alarming device is provided;
to achieve these goals, the utility model adopts following technical scheme: the transformer current anomaly alarming device, comprise the mutual inductor of sampling for to the current signal of the secondary coil of transformer, for the auxiliary transformer that transformer output end voltage signal is gathered, be used for current signal and auxiliary transformer that mutual inductor is sampled from transformer are carried out the rectification circuit of rectification from the voltage signal of transformer collection, for the filtering circuit that the current signal after rectification is carried out filtering, for the mu balanced circuit that voltage signal is carried out voltage stabilizing, be used for filtered current signal and setting value are compared, and comparative result is sent to the comparator circuit of warning circuit, for the warning circuit that the alarming result that compares the circuit transmission is responded,
The current signal output end of mutual inductor connects the current signal input end of rectification circuit, the voltage signal output end of auxiliary transformer connects the voltage signal input end of rectification circuit, the current signal output end of rectification circuit connects the current signal input end of filtering circuit, the voltage signal output end of rectification circuit connects respectively comparator circuit voltage input end and warning circuit voltage input end, the current signal output end of filtering circuit connects the current signal input end of comparator circuit, and the signal output part of comparator circuit connects the signal output part of warning circuit.
Wherein, described rectification circuit comprises diode D1, D2, D3, D4, D7, D8, D9, D10;
D1 is anodal, the anodal equal ground connection of D3,
The D1 negative pole is connected with mutual inductor one end, D2 positive pole,
The D2 negative pole is connected with the current signal input end of D4 negative pole, filtering circuit,
The D3 negative pole is connected with the mutual inductor other end, D4 positive pole;
D7 is anodal, the anodal equal ground connection of D9,
The D7 negative pole is connected with an end, the D8 positive pole of auxiliary transformer secondary coil,
The D8 negative pole is connected with the voltage signal input end of D10 negative pole, mu balanced circuit,
The D9 negative pole is connected with the other end, the D10 positive pole of auxiliary transformer secondary coil.
Wherein, described filtering circuit comprises resistance R 1, capacitor C 1, C2;
R1 one end is anodal with C1, the current signal output end of rectification circuit is connected,
The R1 other end is connected with C2 is anodal,
C1 negative pole, the equal ground connection of the C2 other end.
Wherein, described mu balanced circuit comprises voltage stabilizing chip U2, capacitor C 4, C5;
The first pin of U2 is anodal with C4, the voltage signal output end of rectification circuit is connected,
The three-prong of U2 is anodal with C5, stabilized power source end VCC is connected,
The second pin of U2, C4 negative pole, the equal ground connection of C5 negative pole.
Wherein, described comparator circuit comprises integrated transporting discharging U1, potentiometer RP1, resistance R 2, R3, R6, R7, R10, R11, diode D6;
The first pin of U1 is connected with R6 one end, R7 one end,
The second pin of U1 is connected with the second pin, R3 one end of the first pin of RP1, RP1,
The three-prong of U1 is connected with the R2 other end,
The 4th pin of U1 is connected with the signal input part of warning circuit,
The 5th pin of U1 is connected with R10 one end,
The 6th pin of U1 is connected with the R7 other end, D6 positive pole,
The D6 negative pole is connected with the R6 other end,
The R3 other end is connected with the stabilized power source end VCC of mu balanced circuit,
The R2 other end is connected with the current signal output end of R11 one end, filtering circuit,
The three-prong of RP1, R10, R11 other end ground connection.
Wherein, described warning circuit comprises triode Q1, Q2, light emitting diode D11, diode D5, relay QF1, hummer BP1, resistance R 4, R5, R8, R9, R12, capacitor C 3, connection terminal CN1;
The first pin of Q1 is connected with the negative pole of D11,
The second pin of Q1 is connected with R5 one end;
The three-prong ground connection of Q1;
The R5 other end is connected with the first pin, the R4 other end of U1;
R4 one end is connected with stabilized power source end VCC,
The positive pole of D11 is connected with R9 one end,
The R9 other end is connected with stabilized power source end VCC,
The first pin of Q2 is connected with the second pin of QF1, D5 positive pole, C3 negative pole, BP1 negative pole,
The second pin of Q2 is connected with R1 one end;
The three-prong ground connection of Q2;
The R12 other end is connected with the signal output part of R8 one end, amplifying circuit;
The R8 other end is connected with stabilized power source end VCC,
The first pin of QF1 and D5 negative pole, C3 is anodal, BP1 is anodal, stabilized power source end VCC is connected,
The three-prong of QF1, the 4th pin, the 5th pin are respectively used to be connected with the first terminal, the second terminal, the 3rd terminal of CN1.
Wherein, the described integrated transporting discharging U1 integrated transporting discharging chip that is model LM393.
Wherein, the described voltage stabilizing chip U2 voltage stabilizing chip that is model L7812.
Beneficial effect: the utility model connection transformer, after system signal enters transformer, the secondary coil output signal of transformer; Mutual inductor is sampled to the current signal of the secondary coil of transformer, and auxiliary transformer gathers transformer output end voltage signal; The voltage signal of mutual inductor from the current signal of transformer sampling and auxiliary transformer from the transformer collection carried out rectification; Again the current signal after rectification is carried out filtering; Simultaneously the voltage signal after rectification is carried out voltage stabilizing, the burning voltage that obtains is supplied with comparator circuit and warning circuit; Filtered current signal and setting value are compared, and send comparative result to warning circuit; Comparative result to relatively circuit transmission responds; During the transformer current abnormal, warning circuit can be reported to the police, and is convenient to the Rapid Detection of fault, increases work efficiency, and avoids bringing larger impact to the normal operation of equipment.
Description of drawings
Fig. 1 is the circuit diagram of embodiment.
Fig. 1 comprises following Reference numeral:
The first rectification branch road-11; The second rectification branch road-12; Filtering circuit-2; Mu balanced circuit-3; Comparator circuit-4; Warning circuit-5.
Embodiment
Referring to Fig. 1, below in conjunction with accompanying drawing, the utility model is described in detail.
the utility model comprises the mutual inductor of sampling for to the current signal of the secondary coil of transformer, for the auxiliary transformer that transformer output end voltage signal is gathered, be used for current signal and auxiliary transformer that mutual inductor is sampled from transformer are carried out the rectification circuit of rectification from the voltage signal of transformer collection, for the filtering circuit 2 that the current signal after rectification is carried out filtering, for the mu balanced circuit 3 that voltage signal is carried out voltage stabilizing, be used for filtered current signal and setting value are compared, and comparative result is sent to the comparator circuit 4 of warning circuit 5, for the warning circuit 5 that the alarming result that compares circuit 4 transmission is responded.
The current signal output end of mutual inductor connects the current signal input end of rectification circuit, the voltage signal output end of auxiliary transformer connects the voltage signal input end of rectification circuit, the current signal output end of rectification circuit connects the current signal input end of filtering circuit 2, the voltage signal output end of rectification circuit connects respectively comparator circuit 4 voltage input ends and warning circuit 5 voltage input ends, the current signal output end of filtering circuit 2 connects the current signal input end of comparator circuit 4, and the signal output part of comparator circuit 4 connects the signal output part of warning circuit 5.
In the present embodiment, rectification circuit is made of the first rectification branch road 11 and the second rectification branch road 12.The first rectification branch road 11 comprises diode D1, D2, D3, D4, and the second rectification branch road 12 comprises D7, D8, D9, D10.D1 is anodal, the anodal equal ground connection of D3, the D1 negative pole is connected with mutual inductor one end, D2 positive pole, the D2 negative pole is connected with the current signal input end of D4 negative pole, filtering circuit 2, and the D3 negative pole is connected with the mutual inductor other end, D4 positive pole, and the first 11 pairs of rectification branch roads sample rate current carries out rectification; D7 is anodal, the anodal equal ground connection of D9, the D7 negative pole is connected with an end, the D8 positive pole of auxiliary transformer secondary coil, the D8 negative pole is connected with the voltage signal input end of D10 negative pole, mu balanced circuit 3, the D9 negative pole is connected with the other end, the D10 positive pole of auxiliary transformer secondary coil, and the second 12 pairs of rectification branch roads 7V voltage carries out rectification.
Warning circuit 5 comprises triode Q1, Q2, light emitting diode D11, diode D5, relay QF1, hummer BP1, resistance R 4, R5, R8, R9, R12, capacitor C 3, connection terminal CN1; The first pin of Q1 is connected with the negative pole of D11, and the second pin of Q1 is connected with R5 one end; The three-prong ground connection of Q1; The R5 other end is connected with the first pin, the R4 other end of U1; R4 one end is connected with stabilized power source end VCC, and the positive pole of D11 is connected with R9 one end, and the R9 other end is connected with stabilized power source end VCC, and the first pin of Q2 is connected with the second pin of QF1, D5 positive pole, C3 negative pole, BP1 negative pole, and the second pin of Q2 is connected with R1 one end; The three-prong ground connection of Q2; The R12 other end is connected with the signal output part of R8 one end, amplifying circuit; The R8 other end is connected with stabilized power source end VCC, the first pin of QF1 and D5 negative pole, C3 is anodal, BP1 is anodal, stabilized power source end VCC is connected, and the three-prong of QF1, the 4th pin, the 5th pin are respectively used to be connected with the first terminal, the second terminal, the 3rd terminal of CN1.
Be preferred embodiment that integrated transporting discharging U1 is the integrated transporting discharging chip of model LM393.Voltage stabilizing chip U2 is the voltage stabilizing chip of model L7812.
The utility model connection transformer, after system signal enters transformer, the secondary coil output signal of transformer; Mutual inductor is sampled to the current signal of the secondary coil of transformer, and auxiliary transformer gathers transformer output end voltage signal; The voltage signal of mutual inductor from the current signal of transformer sampling and auxiliary transformer from the transformer collection carried out rectification; Again the current signal after rectification is carried out filtering; Simultaneously the voltage signal after rectification is carried out voltage stabilizing, the burning voltage that obtains is supplied with comparator circuit 4 and warning circuit 5; Filtered current signal and setting value are compared, and send comparative result to warning circuit 5; Comparative result to relatively circuit 4 transmission responds; During the transformer current abnormal, warning circuit 5 can be reported to the police, and is convenient to the Rapid Detection of fault, increases work efficiency, and avoids bringing larger impact to the normal operation of equipment.
Result of the present utility model is simple, and is convenient and practical, and cost is low, is suitable for extensive popularization.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (8)
1. transformer current anomaly alarming device, it is characterized in that: comprise the mutual inductor of sampling for to the current signal of the secondary coil of transformer, for the auxiliary transformer that transformer output end voltage signal is gathered, be used for current signal and auxiliary transformer that mutual inductor is sampled from transformer are carried out the rectification circuit of rectification from the voltage signal of transformer collection, for the filtering circuit that the current signal after rectification is carried out filtering, for the mu balanced circuit that voltage signal is carried out voltage stabilizing, be used for filtered current signal and setting value are compared, and comparative result is sent to the comparator circuit of warning circuit, for the warning circuit that the alarming result that compares the circuit transmission is responded,
The current signal output end of mutual inductor connects the current signal input end of rectification circuit, the voltage signal output end of auxiliary transformer connects the voltage signal input end of rectification circuit, the current signal output end of rectification circuit connects the current signal input end of filtering circuit, the voltage signal output end of rectification circuit connects respectively comparator circuit voltage input end and warning circuit voltage input end, the current signal output end of filtering circuit connects the current signal input end of comparator circuit, and the signal output part of comparator circuit connects the signal output part of warning circuit.
2. transformer current anomaly alarming device according to claim 1, is characterized in that: described
Rectification circuit comprises diode D1, D2, D3, D4, D7, D8, D9, D10;
D1 is anodal, the anodal equal ground connection of D3,
The D1 negative pole is connected with mutual inductor one end, D2 positive pole,
The D2 negative pole is connected with the current signal input end of D4 negative pole, filtering circuit,
The D3 negative pole is connected with the mutual inductor other end, D4 positive pole;
D7 is anodal, the anodal equal ground connection of D9,
The D7 negative pole is connected with an end, the D8 positive pole of auxiliary transformer secondary coil,
The D8 negative pole is connected with the voltage signal input end of D10 negative pole, mu balanced circuit,
The D9 negative pole is connected with the other end, the D10 positive pole of auxiliary transformer secondary coil.
3. electric voltage exception warning device according to claim 1, it is characterized in that: described filtering circuit comprises resistance R 1, capacitor C 1, C2;
R1 one end is anodal with C1, the current signal output end of rectification circuit is connected,
The R1 other end is connected with C2 is anodal,
C1 negative pole, the equal ground connection of the C2 other end.
4. electric voltage exception warning device according to claim 1, it is characterized in that: described mu balanced circuit comprises voltage stabilizing chip U2, capacitor C 4, C5;
The first pin of U2 is anodal with C4, the voltage signal output end of rectification circuit is connected,
The three-prong of U2 is anodal with C5, stabilized power source end VCC is connected,
The second pin of U2, C4 negative pole, the equal ground connection of C5 negative pole.
5. electric voltage exception warning device according to claim 1, it is characterized in that: described comparator circuit comprises integrated transporting discharging U1, potentiometer RP1, resistance R 2, R3, R6, R7, R10, R11, diode D6;
The first pin of U1 is connected with R6 one end, R7 one end,
The second pin of U1 is connected with the second pin, R3 one end of the first pin of RP1, RP1,
The three-prong of U1 is connected with the R2 other end,
The 4th pin of U1 is connected with the signal input part of warning circuit,
The 5th pin of U1 is connected with R10 one end,
The 6th pin of U1 is connected with the R7 other end, D6 positive pole,
The D6 negative pole is connected with the R6 other end,
The R3 other end is connected with the stabilized power source end VCC of mu balanced circuit,
The R2 other end is connected with the current signal output end of R11 one end, filtering circuit,
The three-prong of RP1, R10, R11 other end ground connection.
6. electric voltage exception warning device according to claim 1, it is characterized in that: described warning circuit comprises triode Q1, Q2, light emitting diode D11, diode D5, relay QF1, hummer BP1, resistance R 4, R5, R8, R9, R12, capacitor C 3, connection terminal CN1;
The first pin of Q1 is connected with the negative pole of D11,
The second pin of Q1 is connected with R5 one end;
The three-prong ground connection of Q1;
The R5 other end is connected with the first pin, the R4 other end of U1;
R4 one end is connected with stabilized power source end VCC,
The positive pole of D11 is connected with R9 one end,
The R9 other end is connected with stabilized power source end VCC,
The first pin of Q2 is connected with the second pin of QF1, D5 positive pole, C3 negative pole, BP1 negative pole,
The second pin of Q2 is connected with R1 one end;
The three-prong ground connection of Q2;
The R12 other end is connected with the signal output part of R8 one end, amplifying circuit;
The R8 other end is connected with stabilized power source end VCC,
The first pin of QF1 and D5 negative pole, C3 is anodal, BP1 is anodal, stabilized power source end VCC is connected,
The three-prong of QF1, the 4th pin, the 5th pin are respectively used to be connected with the first terminal, the second terminal, the 3rd terminal of CN1.
7. electric voltage exception warning device according to claim 5, is characterized in that: the integrated transporting discharging chip that described integrated transporting discharging U1 is model LM393.
8. electric voltage exception warning device according to claim 4, it is characterized in that: described voltage stabilizing chip U2 is the voltage stabilizing chip of model L7812.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643894 CN202948050U (en) | 2012-11-29 | 2012-11-29 | Alarm device of abnormal transformer current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643894 CN202948050U (en) | 2012-11-29 | 2012-11-29 | Alarm device of abnormal transformer current |
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|---|---|
| CN202948050U true CN202948050U (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220643894 Expired - Fee Related CN202948050U (en) | 2012-11-29 | 2012-11-29 | Alarm device of abnormal transformer current |
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| CN (1) | CN202948050U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181381A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Input undervoltage alarm circuit |
| CN104991114A (en) * | 2015-07-13 | 2015-10-21 | 吕铝淼 | Overvoltage/under-voltage alarm |
| CN109708831A (en) * | 2018-12-29 | 2019-05-03 | 桂林金鹰乳胶技术有限公司 | A kind of dry method electric-examination new equipment suitable for sheath detection |
-
2012
- 2012-11-29 CN CN 201220643894 patent/CN202948050U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181381A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Input undervoltage alarm circuit |
| CN104991114A (en) * | 2015-07-13 | 2015-10-21 | 吕铝淼 | Overvoltage/under-voltage alarm |
| CN109708831A (en) * | 2018-12-29 | 2019-05-03 | 桂林金鹰乳胶技术有限公司 | A kind of dry method electric-examination new equipment suitable for sheath detection |
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Legal Events
| Date | Code | Title | Description |
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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: 20130522 Termination date: 20141129 |
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| EXPY | Termination of patent right or utility model |