CN203942264U - There is rapid detection three-phase and export unbalanced protective circuit - Google Patents
There is rapid detection three-phase and export unbalanced protective circuit Download PDFInfo
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- CN203942264U CN203942264U CN201420323805.5U CN201420323805U CN203942264U CN 203942264 U CN203942264 U CN 203942264U CN 201420323805 U CN201420323805 U CN 201420323805U CN 203942264 U CN203942264 U CN 203942264U
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- 230000001681 protective effect Effects 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 title claims abstract description 8
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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Abstract
The utility model discloses and a kind ofly there is rapid detection three-phase and export unbalanced protective circuit, three-phase electricity exchanges output and presses the inverting input that connects amplifier after series resistance respectively, the in-phase input end connecting analog ground of amplifier, the output of amplifier connects the inverting input of the first comparator; Connect+15V and connecing in analog after the in-phase input end series resistance of the first comparator; After the inverting input series resistance of the second comparator, connect-15V and end in analog, connect the inverting input of the first comparator after the in-phase input end series resistance of the second comparator; 1 pin connecting analog ground end of clamped pipe, 2 pin connecting analog power ends, between 1 pin and 3 pin, connect electric capacity, contact resistance between 2 pin and 3 pin, connect+15V after two resistance of 3 pin series connection, the common port of two resistance connects the output of the first comparator and the second comparator, after 3 pin series resistances of clamped pipe, connects GFL signal output part.The utility model can be good at the circuit that protection has three-phase alternating current output.
Description
Technical field
The utility model relates to protective circuit technology, relates in particular to a kind ofly to have rapid detection three-phase and export unbalanced protective circuit.
Background technology
For three-phase output circuit, for guaranteeing three-phase alternating current output vector and being zero, play the effect of protective circuit, be badly in need of a kind ofly thering is rapid detection three-phase and exporting unbalanced circuit.
Utility model content
The utility model aims to provide a kind ofly to be had rapid detection three-phase and exports unbalanced protective circuit, guarantees three-phase alternating current output vector and is zero, plays the effect of protective circuit.
The technical solution of the utility model is as follows:
A kind of have rapid detection three-phase and export unbalanced protective circuit, three-phase electricity exchanges output and presses IU, IV, IW to connect respectively to connect the inverting input of amplifier after the first resistance, the second resistance, the 3rd resistance, the in-phase input end connecting analog ground end of amplifier, the first electric capacity and the 4th resistance are connected between the inverting input and output of amplifier, and the output of amplifier connects the inverting input of the first comparator; After in-phase input end series connection the 5th resistance of the first comparator, after connect+15V the 6th resistance of connecting, connect end in analog, the second electric capacity is connected between the inverting input and in-phase input end of the first comparator, and the 7th resistance is connected after the first diode and is connected between the in-phase input end and output of the first comparator; After inverting input series connection the 8th resistance of the second comparator, after connect-15V the 9th resistance of connecting, connect end in analog, the inverting input that connects the first comparator after in-phase input end series connection the tenth resistance of the second comparator, after connect respectively+15V of positive-negative power the end ,-15V of the second comparator connect respectively the 3rd electric capacity, the 4th electric capacity, hold connecting analog, the 5th electric capacity is connected between the inverting input and in-phase input end of the second comparator, and the 11 resistance is connected after the second diode and is connected between the in-phase input end and output of the second comparator; 1 pin connecting analog ground end of clamped pipe, 2 pin connecting analog power ends, the 6th electric capacity is connected between 1 pin and 3 pin of clamped pipe, the 12 resistance is connected between 2 pin and 3 pin of clamped pipe, connect+15V after 3 pin series connection the 13 resistance of clamped pipe and the 14 resistance, the common port of the 13 resistance and the 14 resistance is connected the output of the first comparator and the output of the second comparator, and 3 pin of clamped pipe are connected after the 15 resistance simultaneously and connected GFL signal output part.
Useful technique effect of the present utility model is:
Detecting three-phase output unbalanced circuit of the present utility model, can be good at protecting this type of to have the circuit of three-phase alternating current output, shows after tested well to be applied in practice.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is current-to-voltage converting circuit figure.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
Fig. 1 shows circuit of the present utility model, circuit structure is as follows: three-phase electricity exchanges output and presses IU, IV, IW to connect respectively the inverting input of amplifier IC12C after series resistance R342, R343, R344, the in-phase input end connecting analog ground AGND of amplifier IC12C, capacitor C 180 and resistance R 345 are connected between the inverting input and output of amplifier IC12C, and the output of amplifier IC12C connects the inverting input of comparator IC29B.After the in-phase input end series resistance R346 of comparator IC29B, after connect+15V series resistance R347, meet AGND in analog, capacitor C 181 is connected between the inverting input and in-phase input end of comparator IC29B, after resistance R 348 series diode D43, is connected between the in-phase input end and output of comparator IC29B.After the inverting input series resistance R351 of comparator IC29A, after connect-15V series resistance R352, meet AGND in analog, the inverting input that connects comparator IC29B after the in-phase input end series resistance R349 of comparator IC29A, connecting analog ground AGND after connect respectively+15V of positive-negative power the end ,-15V of comparator IC29A respectively series capacitance C182, C184, capacitor C 183 is connected between the inverting input and in-phase input end of comparator IC29A, after resistance R 350 series diode D44, is connected between the in-phase input end and output of comparator IC29A.The 1 pin connecting analog ground AGND of clamped pipe D42,2 pin connecting analog power supply AVCC, capacitor C 185 is connected between 1 pin and 3 pin of clamped pipe D42, resistance R 350 is connected between 2 pin and 3 pin of clamped pipe D42, connect+15V after 3 pin series resistance R354, the R353 of clamped pipe D42, the common port of resistance R 354 and R353 is connected the output of comparator IC29B and the output of comparator IC29A, and 3 pin of clamped pipe D42 connect GFL signal output part after series resistance R356 simultaneously.
Above-mentioned three-phase electricity exchange output press IU, IV, IW be current sensor CT202B as shown in Figure 2 through scaleover than transforming and obtain by electric current, the scale of current sensor is than being 25A/4V, i.e. IV=4/25*I.
The components and parts that form above circuit are commercial goods.
Principle explanation of the present utility model:
IU, IV, IW is three-phase alternating current output voltage, this three-phase alternating voltage vector output expression formula is IU=IUmaxSinwt, IV=IVmaxSin (wt+120 °), IW=IWmaxSin (wt-120 °).
If three-phase voltage output balance, the vector of three-phase alternating voltage is zero.The model of comparator IC29A, IC29B is LM393, and the 5 pin voltages of comparator IC29B are V=+15*R347/ (R347+R346)=0.714V, if three-phase output balance, the 5 pin voltages of comparator IC29B are higher than 6 pin voltages, and 7 pin are high-impedance state.In like manner, the 2 pin voltages of comparator IC29A are V=-15*R352/ (R351+R352)=-0.714V, if three-phase output balance, the 3 pin voltages of comparator IC29A are higher than 2 pin voltages, and 1 pin is high-impedance state.GFL signal by+15V through the clamped input high level of clamped pipe D42.The model of clamped pipe D42 is 1SS226, and effect is protection CPU, prevents that large voltage from causing damage to CPU.
If three-phase voltage output is uneven; when three-phase alternating voltage vector (being the 6 pin voltages of comparator IC29B) is during higher than the 5 pin voltage 0.714V of comparator IC29B; with 3 pin voltages that should comparator IC29A during lower than 2 pin voltage-0.714V; the three-phase output current that can obtain now according to the scale of current sensor is I=+-(0.714*25/4) * (10/5.1)=+-9A); comparator IC29B upset; 7 pin transfer low level to by high-impedance state; GFL signal transfers low level to from high level, jumps GF protection.
Above-described is only preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate under the prerequisite that does not depart from spirit of the present utility model and design, within all should thinking and being included in protection range of the present utility model.
Claims (1)
1. one kind has rapid detection three-phase and exports unbalanced protective circuit, it is characterized in that: three-phase electricity exchanges output and presses IU, IV, IW to connect respectively to connect the inverting input of amplifier (IC12C) after the first resistance (R342), the second resistance (R343), the 3rd resistance (R344), the in-phase input end connecting analog ground end of amplifier (IC12C), the first electric capacity (C180) and the 4th resistance (R345) are connected between the inverting input and output of amplifier (IC12C), and the output of amplifier (IC12C) connects the inverting input of the first comparator (IC29B), after in-phase input end series connection the 5th resistance (R346) of the first comparator (IC29B), after connect+15V the 6th resistance (R347) of connecting, connect end in analog, the second electric capacity (C181) is connected between the inverting input and in-phase input end of the first comparator (IC29B), after the 7th resistance (R348) series connection the first diode (D43), is connected between the in-phase input end and output of the first comparator (IC29B), after inverting input series connection the 8th resistance (R351) of the second comparator (IC29A), after connect-15V the 9th resistance (R352) of connecting, connect end in analog, the inverting input that connects the first comparator (IC29B) after in-phase input end series connection the tenth resistance (R349) of the second comparator (IC29A), the connect respectively+15V of positive-negative power end of the second comparator (IC29A),-15V the 3rd electric capacity (C182) of connecting respectively, connecting analog ground end after the 4th electric capacity (C184), the 5th electric capacity (C183) is connected between the inverting input and in-phase input end of the second comparator (IC29A), after the 11 resistance (R350) series connection the second diode (D44), be connected between the in-phase input end and output of the second comparator (IC29A), 1 pin connecting analog ground end of clamped pipe (D42), 2 pin connecting analog power ends, the 6th electric capacity (C185) is connected between 1 pin and 3 pin of clamped pipe (D42), the 12 resistance (R350) is connected between 2 pin and 3 pin of clamped pipe (D42), connect+15V after 3 pin series connection the 13 resistance (R354) of clamped pipe (D42) and the 14 resistance (R353), the common port of the 13 resistance (R354) and the 14 resistance (R353) is connected the output of the first comparator (IC29B) and the output of the second comparator (IC29A), 3 pin of clamped pipe (D42) are connected simultaneously and are connected GFL signal output part after the 15 resistance (R356).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420323805.5U CN203942264U (en) | 2014-06-17 | 2014-06-17 | There is rapid detection three-phase and export unbalanced protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420323805.5U CN203942264U (en) | 2014-06-17 | 2014-06-17 | There is rapid detection three-phase and export unbalanced protective circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203942264U true CN203942264U (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420323805.5U Expired - Lifetime CN203942264U (en) | 2014-06-17 | 2014-06-17 | There is rapid detection three-phase and export unbalanced protective circuit |
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| CN (1) | CN203942264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917403A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Automatic switching circuit in power supply applicable to 220V and 110V power grids |
-
2014
- 2014-06-17 CN CN201420323805.5U patent/CN203942264U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917403A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Automatic switching circuit in power supply applicable to 220V and 110V power grids |
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