CN101980348A - Alternating current contact with soft-start and non-arc make-and-break functions - Google Patents
Alternating current contact with soft-start and non-arc make-and-break functions Download PDFInfo
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- CN101980348A CN101980348A CN 201010557400 CN201010557400A CN101980348A CN 101980348 A CN101980348 A CN 101980348A CN 201010557400 CN201010557400 CN 201010557400 CN 201010557400 A CN201010557400 A CN 201010557400A CN 101980348 A CN101980348 A CN 101980348A
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Abstract
The invention discloses a novel alternating current contact with soft-start and non-arc make-and-break functions instead of an ordinary alternating current contactor and a soft starter. In the novel alternating current contactor, a singlechip and high-power power electronic devices such as a silicon controlled rectifier and the like are combined to act on a contact arc extinguishing system of a contactor, which realizes the non-arc make-and-break of a circuit and has a soft-start function. The novel alternating current contactor has the advantages of: simple structure, low cost, more functions, no change of appearance and size of an original contactor, easily implemented process and the like, and can not only perform the non-arc make-and-break on the circuit, but also realize the soft-start function of a motor and simultaneously greatly prolong the service life of the contactor.
Description
Technical field:
The present invention relates to a kind of novel A.C. contactor, particularly relate to and a kind ofly can realize the no arc switching circuit, can realize by the novel A.C. contactor of controlled motor soft start function again, belong to electric power break-make control technology field.
Background technology:
When existing conventional AC contactor is worked, all will produce electric arc inevitably between probe of contactor in connection and the disjunction circuitry processes, the existence of electric arc greatly reduces the electric life of contactor.For many years, the electrical work person has carried out the work of a large amount of various performances of improvement contactor, when the contactor on-off circuit produces electric arc, many researchers have adopted the method for multiple extinguish arcs, as increase the magnetic field arc blow-out, adopt metal grating arc-extinguishing chamber etc., these methods all can not fundamentally be eliminated electric arc, just limit and help extinguish arcs, though there is noncontacting switch to occur in the market, belong to no arc product, exist and cost an arm and a leg, owing to there is not mechanical contact, the conduction loss height, shortcoming such as overload capacity is poor, and is bulky; In addition, for the high power motor load of power, generally all can not directly start above 10kW, its control section must be equipped with soft initiator or other reduced-voltage starting measure except contactor, element is many more, reliability is poor more, has so both increased cost, has reduced the reliability of control again.
Summary of the invention:
1, goal of the invention:
The invention provides a kind of A.C. contactor with soft start and no arc switching function, its objective is on the basis of existing A.C. contactor, by innovative design, make the A.C. contactor can the no arc switching circuit, the electric life of contactor is improved exponentially, prolong the useful life of contactor greatly, can realize the soft start function of high power motor load again.
2, technical scheme:
The present invention is achieved through the following technical solutions:
A kind of A.C. contactor with soft start and no arc switching function is characterized in that: comprise common contactor, inverse parallel controllable silicon SCR, photoelectricity coupling two-way scr triggering device OPTOTRIAC and intelligent controller; The a pair of inverse parallel controllable silicon in parallel at the every phase contact of common contactor two ends, pin of inverse parallel controllable silicon links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device by triggering current-limiting resistance, the bidirectional triode thyristor other end is linked on another pin of inverse parallel silicon controlled, the light-emitting diode positive pole of photoelectricity coupling two-way scr triggering device links to each other by the negative pole of resistance with diode D1, the light-emitting diode negative pole links to each other with capacitor C 1 one ends, capacitor C 1 other end connects an end of resistance R 4, resistance R 4 other ends link to each other with the negative pole of diode D1, the output of intelligent controller is linked the positive pole of diode D1, and the input of intelligent controller is connected with current transformer TA1, current transformer TA2, current transformer TA3 and voltage transformer TV1.
The a pair of inverse parallel controllable silicon U1 in parallel at described common probe of contactor KM1 two ends, the pin 1 of inverse parallel controllable silicon U1 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC1 by resistance R 5, this bidirectional triode thyristor other end is linked on the pin 2 of inverse parallel controllable silicon U1, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC1 is anodal to link to each other with the negative pole of diode D1 by resistance R 1, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends; The a pair of inverse parallel controllable silicon U2 in parallel at common probe of contactor KM2 two ends, the pin 3 of inverse parallel controllable silicon U2 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC2 by resistance R 6, this bidirectional triode thyristor other end is linked on the pin 4 of inverse parallel controllable silicon U2, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC2 is anodal to link to each other with the negative pole of diode D1 by resistance R 2, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends; The a pair of inverse parallel controllable silicon U3 in parallel at common probe of contactor KM3 two ends, the pin 5 of inverse parallel controllable silicon U3 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC3 by resistance R 7, this bidirectional triode thyristor other end is linked on the pin 6 of inverse parallel controllable silicon U3, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC3 is anodal to link to each other with the negative pole of diode D1 by resistance R 3, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends.
Described intelligent controller is the PIC single-chip microcomputer.
Bidirectional triode thyristor in parallel replaces described a pair of inverse parallel controllable silicon at the every phase contact of common contactor two ends.
3, advantage and effect:
The present invention has following advantage:
The present invention combines power electronic device first with the contactor mechanical contact, adopt single-chip microcomputer Based Intelligent Control means, realize that no arc switching and soft start function are in the conventional AC contactor, simple in structure, cost is low, function is many, do not change original contactor overall dimensions, technology realizes easily, can the no arc switching circuit, can realize the soft starter for motor function again, improve the electric life of contactor simultaneously greatly.
Description of drawings:
Fig. 1 is principle of the invention figure.
Embodiment:
The present invention adopts a pair of antiparallel controllable silicon in parallel or bidirectional triode thyristor in parallel at two ends, common contactor every phase contact, by adopting special control device control contact and the controllable silicon sequence of movement that strong and weak electricity is isolated that have, when connecting circuit, make the conducting of controllable silicon elder generation, and by the intelligent control unit control silicon controlled angle of flow, realize soft start function, after treating that motor is finished starting, probe of contactor is connected, controllable silicon negative and positive the two poles of the earth contactor contact short, transfer the state of quitting work to, finish the bearer circuit turn-on power loss by the mechanical contact of contactor; When dividing deenergizing, in like manner, disconnect earlier by control unit control contactor contact, silicon controlled is by the contact that lags behind contactor, the disjunction of circuit is ended by silicon controlled and realizes, owing to be contactless minute deenergizing, can not produce electric arc, so just both realize the function of no arc switching, not needing to have realized simultaneously the outer function that soft initiator just can be realized the high power motor soft start of joining again.
Below in conjunction with accompanying drawing the present invention is added and to be described further:
A kind of A.C. contactor with soft start and no arc switching function is characterized in that: as shown in fig. 1, comprise common contactor, inverse parallel controllable silicon SCR, photoelectricity coupling two-way scr triggering device OPTOTRIAC and intelligent controller 1; The a pair of inverse parallel controllable silicon in parallel at the every phase contact of common contactor two ends, pin of inverse parallel controllable silicon links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device by triggering current-limiting resistance, the bidirectional triode thyristor other end is linked on another pin of inverse parallel silicon controlled, the light-emitting diode positive pole of photoelectricity coupling two-way scr triggering device links to each other by the negative pole of resistance with diode D1, the light-emitting diode negative pole links to each other with capacitor C 1 one ends, capacitor C 1 other end connects an end of resistance R 4, resistance R 4 other ends link to each other with the negative pole of diode D1, the output of intelligent controller 1 is linked the positive pole of diode D1, and the input of intelligent controller 1 is connected with current transformer TA1 respectively, current transformer TA2, current transformer TA3 and voltage transformer TV1.
The a pair of inverse parallel controllable silicon U1 in parallel at described common probe of contactor KM1 two ends, the pin 1 of inverse parallel controllable silicon U1 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC1 by resistance R 5, this bidirectional triode thyristor other end is linked on the pin 2 of inverse parallel controllable silicon U1, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC1 is anodal to link to each other with the negative pole of diode D1 by resistance R 1, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends; The a pair of inverse parallel controllable silicon U2 in parallel at common probe of contactor KM2 two ends, the pin 3 of inverse parallel controllable silicon U2 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC2 by resistance R 6, this bidirectional triode thyristor other end is linked on the pin 4 of inverse parallel controllable silicon U2, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC2 is anodal to link to each other with the negative pole of diode D1 by resistance R 2, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends; The a pair of inverse parallel controllable silicon U3 in parallel at common probe of contactor KM3 two ends, the pin 5 of inverse parallel controllable silicon U3 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC3 by resistance R 7, this bidirectional triode thyristor other end is linked on the pin 6 of inverse parallel controllable silicon U3, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC3 is anodal to link to each other with the negative pole of diode D1 by resistance R 3, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends.
Described intelligent controller 1 is the PIC single-chip microcomputer.
Can also replace described a pair of inverse parallel controllable silicon by bidirectional triode thyristor in parallel at the every phase contact of common contactor two ends.
With the CJ20-400A A.C. contactor is example, at first its no arc switching and soft start function is described:
The coil manipulation voltage of former common contactor is for exchanging 380V, when this A.C. contactor with soft start and no arc switching function of the present invention is worked, as shown in fig. 1, a pair of antiparallel controllable silicon SCR that the every phase contact of contactor KM two ends are all in parallel, these three couples of inverse parallel controllable silicon U1, U2, the conducting of U3 with by by the control of special PIC single-chip microcomputer intelligent controller, in contact break-make moment, by intelligent controller control contactor contact and silicon controlled connection and ON time and sequence of movement, circuit is connected, starting and disjunction moment controllable silicon loaded current, At All Other Times by the mechanical contact loaded current of contactor, thereby realize the function of contactor no arc switching circuit and soft start.The operation principle of this circuit is as follows: when switching on to contactor coil, be about 20ms the intrinsic pickup time of this kind model contactor, intelligent control unit among the figure makes three pairs of antiparallel controllable silicon conductings when 10ms, controllable silicon is connected circuit prior to the contact of contactor like this, during to the 20ms contact closure, contact is just with the controllable silicon short circuit, because the silicon controlled tube voltage drop is not enough to produce electric arc, historical facts or anecdotes has showed no arc turn-on power loss, in the middle of this process,, need soft start function if controlled load is a high power motor, then intelligent control unit can be delayed time and be connected the control coil of contactor, and the silicon controlled angle of flow that control is in parallel with contacts of contactor makes the ascending increase gradually of supply voltage, realizes the soft start function of motor, after treating that electric motor starting finishes, make contactor coil energising again, contacts of contactor is connected, by the contactor mechanical contact with the two poles of the earth short circuit of controllable silicon negative and positive, controllable silicon quits work, and electric current imposes on load through the contactor mechanical contact; When contactor coil cuts off the power supply, be about 15ms the intrinsic release time of this contactor, and the controllable silicon intelligent control unit is because the electric current that has storage capacitor C1 to discharge makes intelligent control unit keep operating state before 20ms always, like this when nearly the 15ms probe of contactor is about to open, because the rapid increase of contact resistance, when the pressure drop of contact two ends is increased to the 8V left and right sides (less than giving birth to arc voltage), because triggering signal exists always, controllable silicon is by being become conducting state by the off position of contact short circuit, this transfer process is extremely lacked (microsecond level), before contact is not opened as yet, the electric current of contact of flowing through has forwarded on the controllable silicon, contact almost is to open under no-load is cut-off situation like this, and controllable silicon ends owing to triggering signal disappears when 20ms, thereby makes circuit realize that no arc cut-offs.
The present invention combines power electronic device first with the contactor mechanical contact, adopt single-chip microcomputer Based Intelligent Control means, realize that no arc switching and soft start function are in the conventional AC contactor, and scheme is simple, and the reliability height is on the overall dimensions that do not change original contactor, external characteristic basis, only need to change arc-extinguish chamber, control device, controllable silicon etc. is installed in the shell of new replacement arc-extinguish chamber, this shell adopts exotic material to make and gets final product, and is suitable for large-scale commercial Application.
Claims (4)
1. the A.C. contactor with soft start and no arc switching function is characterized in that: comprise common contactor, inverse parallel controllable silicon SCR, photoelectricity coupling two-way scr triggering device OPTOTRIAC and intelligent controller (1); The a pair of inverse parallel controllable silicon in parallel at the every phase contact of common contactor two ends, pin of inverse parallel controllable silicon links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device by triggering current-limiting resistance, the bidirectional triode thyristor other end is linked on another pin of inverse parallel silicon controlled, the light-emitting diode positive pole of photoelectricity coupling two-way scr triggering device links to each other by the negative pole of resistance with diode D1, the light-emitting diode negative pole links to each other with capacitor C 1 one ends, capacitor C 1 other end connects an end of resistance R 4, resistance R 4 other ends link to each other with the negative pole of diode D1, the output of intelligent controller (1) is linked the positive pole of diode D1, and the input of intelligent controller (1) is connected with current transformer TA1, current transformer TA2, current transformer TA3 and voltage transformer TV1.
2. a kind of A.C. contactor according to claim 1 with soft start and no arc switching function, it is characterized in that: a pair of inverse parallel controllable silicon U1 in parallel at described common probe of contactor KM1 two ends, the pin 1 of inverse parallel controllable silicon U1 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC1 by resistance R 5, this bidirectional triode thyristor other end is linked on the pin 2 of inverse parallel controllable silicon U1, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC1 is anodal to link to each other with the negative pole of diode D1 by resistance R 1, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends; The a pair of inverse parallel controllable silicon U2 in parallel at common probe of contactor KM2 two ends, the pin 3 of inverse parallel controllable silicon U2 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC2 by resistance R 6, this bidirectional triode thyristor other end is linked on the pin 4 of inverse parallel controllable silicon U2, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC2 is anodal to link to each other with the negative pole of diode D1 by resistance R 2, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends; The a pair of inverse parallel controllable silicon U3 in parallel at common probe of contactor KM3 two ends, the pin 5 of inverse parallel controllable silicon U3 links to each other with bidirectional triode thyristor one end of photoelectricity coupling two-way scr triggering device OPTOTRIAC3 by resistance R 7, this bidirectional triode thyristor other end is linked on the pin 6 of inverse parallel controllable silicon U3, the light-emitting diode of photoelectricity coupling two-way scr triggering device OPTOTRIAC3 is anodal to link to each other with the negative pole of diode D1 by resistance R 3, and this light-emitting diode negative pole links to each other with capacitor C 1 one ends.
3. a kind of A.C. contactor with soft start and no arc switching function according to claim 1 is characterized in that: described intelligent controller (1) is the PIC single-chip microcomputer.
4. according to claim 1,2 or 3 described a kind of A.C. contactors with soft start and no arc switching function, it is characterized in that: bidirectional triode thyristor in parallel replaces described a pair of inverse parallel controllable silicon at the every phase contact of common contactor two ends.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010557400 CN101980348A (en) | 2010-11-24 | 2010-11-24 | Alternating current contact with soft-start and non-arc make-and-break functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010557400 CN101980348A (en) | 2010-11-24 | 2010-11-24 | Alternating current contact with soft-start and non-arc make-and-break functions |
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| CN101980348A true CN101980348A (en) | 2011-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010557400 Pending CN101980348A (en) | 2010-11-24 | 2010-11-24 | Alternating current contact with soft-start and non-arc make-and-break functions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709899A (en) * | 2012-06-06 | 2012-10-03 | 淄博联诚电力科技有限公司 | Intelligent arc extinction and resonance extinction overvoltage protection integral optimization device |
| CN104333267A (en) * | 2014-10-20 | 2015-02-04 | 信阳师范学院 | Star triangle intelligent soft start controller based on PIC |
| CN108742102A (en) * | 2018-05-25 | 2018-11-06 | 九阳股份有限公司 | A kind of control method of food processor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158595Y (en) * | 1993-05-06 | 1994-03-09 | 赖宣芹 | Speed-adjusting device for pump motor |
| CN1988095A (en) * | 2006-11-30 | 2007-06-27 | 沈阳工业大学 | Permanent magnet non-arching AC contactor |
| CN201893292U (en) * | 2010-11-24 | 2011-07-06 | 沈阳工业大学 | Alternating current contactor with soft start and arcless on-off functions |
-
2010
- 2010-11-24 CN CN 201010557400 patent/CN101980348A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158595Y (en) * | 1993-05-06 | 1994-03-09 | 赖宣芹 | Speed-adjusting device for pump motor |
| CN1988095A (en) * | 2006-11-30 | 2007-06-27 | 沈阳工业大学 | Permanent magnet non-arching AC contactor |
| CN201893292U (en) * | 2010-11-24 | 2011-07-06 | 沈阳工业大学 | Alternating current contactor with soft start and arcless on-off functions |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709899A (en) * | 2012-06-06 | 2012-10-03 | 淄博联诚电力科技有限公司 | Intelligent arc extinction and resonance extinction overvoltage protection integral optimization device |
| CN104333267A (en) * | 2014-10-20 | 2015-02-04 | 信阳师范学院 | Star triangle intelligent soft start controller based on PIC |
| CN104333267B (en) * | 2014-10-20 | 2017-08-29 | 信阳师范学院 | Star triangle intelligent soft starting controller based on PIC |
| CN108742102A (en) * | 2018-05-25 | 2018-11-06 | 九阳股份有限公司 | A kind of control method of food processor |
| CN108742102B (en) * | 2018-05-25 | 2020-09-08 | 九阳股份有限公司 | Control method of food processing machine |
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Application publication date: 20110223 |