CN1181650A - Intelligent three-phase protection solid-state relay - Google Patents
Intelligent three-phase protection solid-state relay Download PDFInfo
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- CN1181650A CN1181650A CN 96120400 CN96120400A CN1181650A CN 1181650 A CN1181650 A CN 1181650A CN 96120400 CN96120400 CN 96120400 CN 96120400 A CN96120400 A CN 96120400A CN 1181650 A CN1181650 A CN 1181650A
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- phase
- relay
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- auxiliary contact
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- 230000002441 reversible effect Effects 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims 1
- 230000006870 function Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 206010063385 Intellectualisation Diseases 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 230000007123 defense Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
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Abstract
An intelligent three-phase protection solid-state relay belongs to the technical field of realizing automatic control of power electronic elements by applying a microcontroller technology. The existing three-phase solid-state relay has poor anti-interference capability, can not measure the phase loss caused by the fault of the relay, and has no auxiliary contact and reversible operation function. The invention adopts the microprocessor and computer software technology to realize intellectualization, improves the anti-interference capability and reliability, has the functions of auxiliary contacts and reversible operation, carries out open-phase detection at the output end and realizes the three-phase protection function. The invention is used for controlling three-phase electric appliances, in particular to the unidirectional or reversible operation control of a three-phase alternating current motor.
Description
The invention belongs to and use the technical field that the microcontroller technology realizes that the power electronics original paper is controlled automatically.
A kind of three-phase protective solid relay is arranged in the prior art; see " the defense-related science and technology achievement promotion project guide " 46th～47 page of technical foundation office of Commission of Science, Technology and Industry for National Defence in December, 1994 establishment; it mainly is made up of small-scale logical circuit and reverse-blocking tetrode thyristor circuit, realizes three-phase solid-state relay function.
Because what existing this relay adopted is general small-scale logical circuit, sees accompanying drawing 1, when outside or internal interference signals, misoperation usually appears in relay, for example frequent start-stop.Its open-phase protection circuit is to receive input in addition, and the phase shortage for producing owing to the fault of relay own then can not realize the three-phase protective function.Because this relay global design specificity makes this relay not possess auxiliary contact, do not have contrary operation function in addition yet.In order to overcome above-mentioned two shortcomings, make simultaneously this relay set up auxiliary contact and have contrary operation function that we have invented intelligent three-phase protective solid relay.
The present invention realizes like this, replace former small-scale logical circuit with microcontroller and corresponding computer program, this part is an intelligent cell, by inquiry scan, can export respectively and be with auxiliary contact control signal, reversible control signal, cut-off signals and alarm signal the input signal of the preset unit that constitutes by the input unit formed of input button, by initialize switch and the phase shortage detecting unit generation mainly formed by Hall element and magnetic coil.When preset unit was chosen in auxiliary contact, relay was also exported several single phase poaer supplies except that output 380V three phase mains; When preset unit was chosen in reversible state, this relay was exported two groups of interchangeable 380V three phase mains of phase line; When the phase shortage detecting unit after intelligent cell input default phase signal, relay cuts out automatically, and is reported to the police by alarm unit.Driver element, photoelectricity coupling unit and control unit after the intelligent cell are more than three groups, and the part that exceeds three groups is auxiliary contact, wherein two groups respectively with first three groups in the middle of two groups is connected, relay is in against operating condition.Phase shortage detecting unit one relay termination 380V three-phase output end, another termination intelligent cell input.Computer program directly towards detecting and controlling object, realize various input signal cycle detection by the circulation main program.
Because the present invention replaces former small-scale logical circuit with intelligent cell, has overcome the interference of external noise signal and relay itself.Because the phase shortage detecting unit is received the output of relay, thereby can realize protection to the phase shortage that the fault of relay own causes.Because auxiliary contact are set, make this relay that the single phase poaer supply relevant with the 380V three-phase electricity can be provided simultaneously, it is reversible to make that also this relay can possess
Fig. 1 is a relay circuit block diagram of the prior art, and Fig. 2 is the theory diagram of hardware components of the present invention, and Fig. 3 is a hardware circuit diagram of the present invention, and Fig. 4 is the principle flow chart of software section of the present invention.
Now in conjunction with example explanation the present invention, see accompanying drawing 2,3,4, input unit is by key K
1, K
2, K
3, K
4Form, respectively with intelligent cell, the input P of microcontroller 8751 just
1.0～P
1.3Link to each other, preset unit is key K
5, with the input P of microcontroller
1.4Link to each other; 5 output P of microprocessor
3.0～P
3.45 driver Q ' with driver element
1～Q '
5(model is 7406) links to each other, and subsequent is 5 photoelectrical coupler M of photoelectricity coupling unit
1～M
5, model is M0C3041, through current-limiting resistance R
6～R
10, insert the 380V three-phase electricity, A phase and R
8Link to each other B phase and R
7, R
9Link to each other C phase and R
6, R
10Link to each other, subsequent is 5 groups of switch blocks, i.e. T of control unit
1, R
1, C
1～T
5, R
5, C
5, T
1～T
5Be BTA41.6 00B, output is respectively Q
5～Q
1, against operating condition the time, Q
5With Q
2, Q
4With Q
1Link to each other.Magnetic coil in the phase shortage detecting unit is to remove on the same magnetic core around on the contrary, two groups of coils that other is all identical, it and Q
1, Q
3, Q
3Link to each other the input P of Hall element and microprocessor
1.5Link to each other.Output end of microprocessor P
3.5The indicator light of unit taking alarm.Software reset mode is from power on started working, and at first each parameter in the microprocessor is carried out initialization operation, inquires about K then
1～K
4Situation after inquiring push button signalling, is carried out jitter elimination with the software delay mode to push button signalling.After determining this push button signalling, according to inquiry K
5Normally closed is contrary running, K
5Often open and be the auxiliary contact state, all carry out the key function and loose and change, forward the key handling procedure of this key to, send corresponding signal, promptly reversible control signal or auxiliary contact signal, relay output end Q afterwards
5～Q
1Output signal will be arranged, immediately to Q
3～Q
1Carry out phase shortage and detect, send cut-off signals immediately after detecting phase shortage, slew relay work, and send alarm signal.If phase shortage does not then forward the inlet of bonded state inquiry next time to, circulation is carried out.This software adopts the establishment of 51 single-chip microcomputer assembler languages, is assembled into the microcontroller machine code by composing software, carries out artificial debugging by 51 microcomputer development instruments, is directly fixed among the inside ROM of 8751 microcontrollers, carries with relay itself.
Claims (6)
1. a three-phase protective solid relay partly is made of driver element, photoelectricity coupling unit, control unit, phase shortage detecting unit etc., it is characterized in that:
(1) it is equipped with an intelligent cell, and this intelligent cell is made up of microprocessor and correspondent computer software, to the input signal inquiry scan, can export band auxiliary contact control signal, reversible control signal, cut-off signals and alarm signal respectively,
(2) driver element, photoelectricity coupling unit and the control unit after the intelligent cell is 5 groups, and wherein 2 groups is auxiliary contact, when it joins with other in 3 groups 2 groups respectively, but and after microcontroller inquired inverse signal, this relay was in the reversible operation state,
(3) phase shortage detecting unit and this relay three-phase electricity output join, as long as relay output phase shortage, microcontroller can detect, and sends cut-off signals and alarm signal.
2. according to claim 1, described three-phase protective solid relay is characterized in that; computer program is directly towards detecting and controlling object; by cyclic program, realize real-time detection and control output to various input signals, realized the intellectuality of three-phase solid-state relay.
3. three-phase protective solid relay according to claim 1 is characterized in that, the phase shortage detecting unit mainly by same core, around forming to opposite two groups of coils and a Hall element.
4. three-phase protective solid relay according to claim 1 is characterized in that, shake interference and the external noise of eliminating input key signal by software delay disturb.
5. three-phase protective solid relay according to claim 1 is characterized in that, the three-phase electricity input A R that joins
8And T
3Between the input, meet R when B is identical
7And T
2Between the input, R
9And T
4Between the input, meet R when C is identical
6And T
1Between the input, R
10And T
5Between the input.
6. three-phase protective solid relay according to claim 1 is characterized in that, during the reversible operation state, and initialize switch K
5Normally closed, relay auxiliary contact Q
5With three-phase electricity output Q
2Link to each other auxiliary contact Q
4With output Q
1Link to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96120400 CN1181650A (en) | 1996-11-05 | 1996-11-05 | Intelligent three-phase protection solid-state relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96120400 CN1181650A (en) | 1996-11-05 | 1996-11-05 | Intelligent three-phase protection solid-state relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1181650A true CN1181650A (en) | 1998-05-13 |
Family
ID=5126296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96120400 Pending CN1181650A (en) | 1996-11-05 | 1996-11-05 | Intelligent three-phase protection solid-state relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1181650A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664568A (en) * | 2012-04-23 | 2012-09-12 | 库顿电子科技(上海)有限公司 | Novel solid-state relay aiming at running direction control of three-phase alternating current motor and method |
-
1996
- 1996-11-05 CN CN 96120400 patent/CN1181650A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664568A (en) * | 2012-04-23 | 2012-09-12 | 库顿电子科技(上海)有限公司 | Novel solid-state relay aiming at running direction control of three-phase alternating current motor and method |
| CN102664568B (en) * | 2012-04-23 | 2014-12-24 | 库顿电子科技(上海)有限公司 | Novel solid-state relay aiming at running direction control of three-phase alternating current motor and method |
| US9559625B2 (en) | 2012-04-23 | 2017-01-31 | Kudom Electronics Technology (Shanghai) Co., Ltd. | Solid-state relay for running direction control of three-phase alternating current motor and method thereof |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |