CN202041607U - Three-phase AC open-phase and anti-phase detection circuit - Google Patents
Three-phase AC open-phase and anti-phase detection circuit Download PDFInfo
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- CN202041607U CN202041607U CN2011201473362U CN201120147336U CN202041607U CN 202041607 U CN202041607 U CN 202041607U CN 2011201473362 U CN2011201473362 U CN 2011201473362U CN 201120147336 U CN201120147336 U CN 201120147336U CN 202041607 U CN202041607 U CN 202041607U
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- phase
- circuit
- comparer
- chip microcomputer
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Abstract
The utility model discloses a three-phase AC open-phase and anti-phase detection circuit which is characterized in that a triphase AC power supply is connected with respective resistance-voltage-dividing type sampling circuits; each resistance-voltage-dividing type sampling circuit and a corresponding reference voltage circuit are connected with a corresponding comparator at the same time; and each comparator is connected with a singlechip. The detection circuit can detect open-phase and anti-phase of a system and give an alarm so as to enhance the reliability and the safety of system operation, and has the advantages of high detection precision, full linear circuit, small volume, etc.
Description
Technical field:
The utility model relates to a kind of electric power system alternating current phase shortage, anti-phase testing circuit, belongs to the industrial detection field.
Background technology:
Use devices such as contactor, relay in present many power system devices, when phase shortage takes place, can cause the phase shortage voltage detecting inaccurate by their coil, thereby influence the judgement of system phase shortage, can not in time pinpoint the problems, directly influence the security of operation of electric system.
Summary of the invention:
The utility model provides a kind of accuracy of detection height at the above-mentioned deficiency of prior art, the three-phase alternating current phase shortage that volume is little, anti-phase testing circuit.
Technical solution of the present utility model is: a kind of three-phase alternating current phase shortage, anti-phase testing circuit, three-phase alternating-current supply is connected with separately electric resistance partial pressure type sample circuit respectively, each electric resistance partial pressure type sample circuit and corresponding reference voltage circuit are connected to corresponding comparer simultaneously, and each comparer is connected with single-chip microcomputer.
Described comparer adopts 2252 models, and single-chip microcomputer adopts P89LPC932A1 to strengthen model, pulse square wave ax, the bx of comparer output, P13, P14, the P12 pin that cx is input to single-chip microcomputer respectively.
The utility model detects, reports to the police system's phase shortage, anti-phase, thereby has strengthened reliability of system operation and security, has the accuracy of detection height; The full linear circuit, advantage such as volume is little.P89LPC932A1 enhancement mode single-chip microcomputer has adopted high performance processor structure, only needs 2 to 4 clock period instruction time, and 6 times to standard 80C51 device, has therefore improved arithmetic speed greatly, thereby has improved the precision of signals collecting.P89LPC932A1 adopts 4 interrupt priority level structures, and each interrupt source all can be set to one of 4 interrupt priority levels separately, has improved great dirigibility.Many system-level functions that it is integrated can reduce the area of component number and wiring board so in a large number and reduce system cost.The highly integrated reliability of system operation that improved.
The utility model inserts three-phase alternating-current supply 1A_IN, the 1B_IN that will detect, 1C_IN (zero line N with internally be connected), obtain sampled voltage 1A_VOL, 1B_VOL, 1C_VOL by electric resistance partial pressure respectively, the sampled voltage and the reference voltage that obtain are relatively exported by comparer, can obtain pulse square wave ax, bx, cx respectively in comparer output like this, again pulse square wave is delivered to single-chip microcomputer, utilize three interrupt source INT0, INT1 and the T0 of single-chip microcomputer, negative edge at pulse square wave produces interruption, when A interrupts mutually, with counter T
AbZero clearing when B interrupts mutually, is taken out the value T of counter
Ab, and with T
BcZero clearing when C interrupts mutually, is taken out the value T of counter
Bc, with T
CaZero clearing when A interrupts mutually, is taken out the value T of counter again
Ca, again with counter T
AbZero clearing, so circulation.If do not interrupt, then can directly judge this phase phase shortage.
But in the actual motion system, often have equipment such as contactor, relay, when system's phase shortage, can still can produce interruption, because three-phase alternating current differs 120 degree, as three-phase alternating current T just often because the effect of coil cause phase shortage one road that the voltage input is still arranged
Ab≈ T
Bc≈ T
Ca(be not 0, ignore error), on the contrary then be phase shortage.Illustrate: for example in the system contactor is arranged, its coil connects the AB two-phase, when A phase shortage wherein,, interrupt to introduce on the pin B phase voltage mutually at A and produce and interrupt by the cause of coil, what promptly three interrupt sources of single-chip microcomputer this moment connected is to interrupt 1:B phase (former A phase), interrupt the 2:B phase, interrupt the 3:C phase because interrupt 1 and interruption 2 be all B mutually, therefore will produce interruption, i.e. T simultaneously
Ab≈ 0,2T
Bc≈ T
Ca(ignoring error).When system lacks A the i.e. 1. T of two kinds of situations is arranged mutually as can be known by example
Ab≈ 0,2T
Bc≈ T
Ca(B encircles the phase into A mutually), 2. T
Ca≈ 0,2T
Ab≈ T
Bc(C encircles the phase into A mutually); Scarce B has the i.e. 1. T of two kinds of situations mutually
Ab≈ 0,2T
Ca≈ T
Bc(A encircles the phase into B mutually), 2. T
Bc≈ 0,2T
Ca≈ T
Ab(C encircles the phase into B mutually); Scarce C has the i.e. 1. T of two kinds of situations mutually
Ca≈ 0,2T
Ab≈ T
Bc(A encircles the phase into C mutually), 2. T
Bc≈ 0,2T
Ca≈ T
Ab(B encircles the phase into C mutually).
Phase sequence is judged.At first, period T can be drawn, under normal circumstances,, positive sequence can be judged as, if 2T/3 then is an anti-phase if the time between interruptions between the two-phase is T/3 according to the interval time of single-phase twice interruption.
Description of drawings:
Fig. 1 is a sample circuit of the present utility model.
Fig. 2 is a comparer connecting circuit of the present utility model.
Fig. 3 is a single-chip microcomputer connecting circuit of the present utility model.
Embodiment:
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Shown in Fig. 1～3, a kind of three-phase alternating current phase shortage, anti-phase testing circuit, three-phase alternating-current supply is connected with separately electric resistance partial pressure type sample circuit respectively, each electric resistance partial pressure type sample circuit and corresponding reference voltage circuit are connected to corresponding comparer simultaneously, comparer adopts 2252 models, each comparer is connected with single-chip microcomputer, and single-chip microcomputer adopts P89LPC932A1 to strengthen model, pulse square wave ax, the bx of comparer output, P13, P14, the P12 pin that cx is input to single-chip microcomputer respectively.
Claims (2)
1. a three-phase alternating current phase shortage, anti-phase testing circuit, it is characterized in that: three-phase alternating-current supply is connected with separately electric resistance partial pressure type sample circuit respectively, each electric resistance partial pressure type sample circuit and corresponding reference voltage circuit are connected to corresponding comparer simultaneously, and each comparer is connected with single-chip microcomputer.
2. three-phase alternating current phase shortage according to claim 1, anti-phase testing circuit, it is characterized in that: described comparer adopts 2252 models, single-chip microcomputer adopts P89LPC932A1 to strengthen model, pulse square wave ax, the bx of comparer output, P13, P14, the P12 pin that cx is input to single-chip microcomputer respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201473362U CN202041607U (en) | 2011-05-09 | 2011-05-09 | Three-phase AC open-phase and anti-phase detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201473362U CN202041607U (en) | 2011-05-09 | 2011-05-09 | Three-phase AC open-phase and anti-phase detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202041607U true CN202041607U (en) | 2011-11-16 |
Family
ID=44969045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201473362U Expired - Lifetime CN202041607U (en) | 2011-05-09 | 2011-05-09 | Three-phase AC open-phase and anti-phase detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202041607U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882073A (en) * | 2012-09-13 | 2013-01-16 | 华为技术有限公司 | Connecting piece and connection status detection method for same |
| CN104081656A (en) * | 2012-03-23 | 2014-10-01 | 株式会社日立产机系统 | Power conversion device |
| CN106546830A (en) * | 2016-10-27 | 2017-03-29 | 北京机械设备研究所 | A kind of N phase voltages phase shortage and negative phase sequence detection method |
| CN110289655A (en) * | 2019-07-04 | 2019-09-27 | 北京智芯微电子科技有限公司 | The recognition methods of input voltage mode |
-
2011
- 2011-05-09 CN CN2011201473362U patent/CN202041607U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104081656A (en) * | 2012-03-23 | 2014-10-01 | 株式会社日立产机系统 | Power conversion device |
| CN104081656B (en) * | 2012-03-23 | 2017-04-05 | 株式会社日立产机系统 | Power inverter |
| CN102882073A (en) * | 2012-09-13 | 2013-01-16 | 华为技术有限公司 | Connecting piece and connection status detection method for same |
| CN106546830A (en) * | 2016-10-27 | 2017-03-29 | 北京机械设备研究所 | A kind of N phase voltages phase shortage and negative phase sequence detection method |
| CN106546830B (en) * | 2016-10-27 | 2019-09-10 | 北京机械设备研究所 | A kind of N phase voltage phase shortage and negative phase sequence detection method |
| CN110289655A (en) * | 2019-07-04 | 2019-09-27 | 北京智芯微电子科技有限公司 | The recognition methods of input voltage mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |
|
| CX01 | Expiry of patent term |