CN201994214U - Combination switch with rectifying tube for arc extinction - Google Patents
Combination switch with rectifying tube for arc extinction Download PDFInfo
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- CN201994214U CN201994214U CN2011200752503U CN201120075250U CN201994214U CN 201994214 U CN201994214 U CN 201994214U CN 2011200752503 U CN2011200752503 U CN 2011200752503U CN 201120075250 U CN201120075250 U CN 201120075250U CN 201994214 U CN201994214 U CN 201994214U
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- switch
- rectifying tube
- control circuit
- switch element
- mechanical switch
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model relates to a combination switch with a rectifying tube for arc extinction, which is mainly used for solving the problem that standard sine waves can not be outputted due to impacts of conduction angle of a silicon controlled rectifier when the silicon controlled rectifier is used as a switch element. The combination switch comprises a control circuit (7), a mechanical switch driving circuit (8) and the switch element (9), wherein the control circuit (7) is sequentially connected with the mechanical switch driving circuit (8) and the switch element (9), the switch element (9) is connected with the control circuit (7), and the combination switch is characterized in that the switch element (9) is formed by connecting the rectifying tube (6) with a mechanical switch (5) in parallel. A single-chip microcomputer or a digital signal processing chip is taken as a core control element for performing analysis treatment on sampled signals from two ends of the switch element, when the rectifying tube (6) is in forward bias, the mechanical switch is closed. The combination switch utilizes the rectifying tube to replace the silicon controlled rectifier, thereby eliminating the impacts of the conduction angle of the silicon controlled rectifier, enabling output waveform to be closer to the standard sine waves, eliminating electric arc operation during switching and being simple in control way.
Description
Technical field
The utility model relates to used combination switch in a kind of low tension switch technical field, particularly a kind of combination switch that has the rectifying tube extinguishing arc.
Background technology
In the low tension switch technical field, reactive power factor compensation device generally adopts A.C. contactor, controllable silicon and combination switch as fling-cut switch.A.C. contactor is as mechanical switch, have stronger anti overvoltage, overcurrent capability, but its shortcoming is in closure and breaking course, can produce surge current and electric arc, and with the rising of voltage and the increasing of electric current, electric arc also can grow, can cause all or part of fusion in contact, reduce switch useful life, the safe operation that jeopardizes electric equipment.Controllable silicon is as electronic switch, has characteristics contactless, that the life-span is long, but because of controllable silicon is a kind of controlled rectification device of four layer of three knot, in the work knot pressure drop bigger, can produce bigger power dissipation, be required to be electronic switch and be equipped with good radiating condition.
In Chinese patent CN200710111270.X, a kind of intelligent compound switch that is used for reactive power compensation has been described, with the controllable silicon switch element.Zero cross detection circuit provides triggering signal for controllable silicon, after the controllable silicon conducting, provides control signal by current transformer for relay or contactor, makes relay or contactor closure; Utilize capacitor discharge time-delay, relay or the contactor branch controllable silicon of having no progeny is disconnected.The conducting of zero cross detection circuit control controllable silicon, weak point is that the silicon controlled angle of flow generally is no more than 176 °, therefore can not outputting standard sine wave.
Summary of the invention
The utility model be to overcome exist in the background technology be switch element with the controllable silicon because of the influence of the silicon controlled angle of flow cause can not outputting standard sine wave problem a kind of combination switch that has the rectifying tube extinguishing arc is provided, this device utilizes rectifying tube to replace controllable silicon, eliminated the influence of thyristor operating angle, the output waveform sine wave that more is near the mark, no electric arc operation in the switching, control mode is simple.
The invention for solving the technical problem can reach by following technical solution: this combination switch that has the rectifying tube extinguishing arc comprises control circuit, mechanical switch drive circuit, switch element, control circuit connects mechanical switch driving circuit, switch element successively, switch element connects control circuit, and described switch element constitutes by rectifying tube is in parallel with mechanical switch.
The utility model is compared with the above-mentioned background technology can have following beneficial effect: this has the combination switch of rectifying tube extinguishing arc owing to utilize rectifying tube in parallel with mechanical switch, be applied to power factor compensation device, replace existing switch executing element to carry out electric capacity input and excision, no electric arc operation in the switching; Utilize rectifying tube to replace controllable silicon, eliminated the influence of thyristor operating angle, the output waveform sine wave that more is near the mark has reduced circuit element quantity, and control mode is simple.
Description of drawings:
Accompanying drawing 1 is a control circuit theory diagram of the present utility model;
Among the figure: the instruction of 1-switching, 2-processing signals, 3-drive signal, 4-sampled signal, 5-mechanical switch, 6-rectifying tube, 7-control circuit, 8-mechanical switch drive circuit, 9-switch element.
Embodiment:
Below in conjunction with accompanying drawing will the utility model is described in further detail:
As shown in Figure 1, this combination switch that has the rectifying tube extinguishing arc comprises control circuit 7, mechanical switch drive circuit 8, switch element 9, control circuit 7 connects mechanical switch driving circuit 8, switch element 9 successively, switch element 9 connects control circuit 7, described switch element 9 constitutes by rectifying tube 6 and mechanical switch 5 are in parallel, and described mechanical switch 5 is relay or A.C. contactor.Described control circuit 7 comprises at least one digital signal processing chip and/or single-chip microcomputer.The switching instruction 1 of described control circuit 7 receiving systems, control circuit 7 obtains the sampled signal 4 of switch element 9, and control circuit 7 is to mechanical switch drive circuit 8 output processing signals 2, and drive circuit 8 is to switch element 9 output drive signals 3.
Fig. 1 is a control circuit theory diagram of the present utility model, and mechanical switch drive circuit 8 and switch element 9 constitute final controlling element of the present invention, and control circuit 7 is used to control final controlling element.Accompanying drawing 3 is electrical schematic diagrams of the control circuit shown in the accompanying drawing 1, accompanying drawing 2 is switch element electricity principle schematic, schematically show the electrical connection between mechanical switch 5 and the rectifying tube 6, and with the interaction of drive signal 3, sampled signal 4, mechanical switch 5 is relay or A.C. contactor.Described relay is the magnetic latching relay that Shanghai Wanjia Precision Components Co., Ltd. produces, and model is WJ308/DC9V.
As shown in Figure 3, described control circuit 7 comprises at least one digital signal processing chip or single-chip microcomputer, or at least one digital signal processing chip and single-chip microcomputer.When control circuit 7 is the core control element with the single-chip microcomputer, sampled signal 4 and preset threshold are compared, then send processing signals 2 when sampled signal 4 is not less than preset threshold to mechanical switch drive circuit 8 by the program of setting; Switch element 9 is made of mechanical switch 5 and rectifying tube 6 parallel connections, and mechanical switch 5 adopts known electric drive formula electromagnetic switch, can be relay or A.C. contactor; Mechanical switch drive circuit 8 adopts known electronic drive circuit, is used to control the closure or the disjunction of mechanical switch.The voltage drop of mechanical switch 5 closure states is very little, so preset threshold is generally several millivolts to tens millivolts.Described single-chip microcomputer is that 8 AVR microprocessors that special Mel semiconductor company produces are loved by the U.S., and model is ATmega48V-10PU.
When electric capacity need excise in system, control circuit 7 receives the switching instruction 1 of system, the both end voltage of 7 pairs of rectifying tubes 6 of control circuit is sampled, this sampled signal 4 is contact voltage drops of mechanical switch, then export processing signals 2 when rectifying tube 6 presents forward bias, this processing signals 2 can be voltage signal or current signal.Mechanical switch drive circuit 8 receives the processing signals 2 from control circuit 7, disconnects drive signal 3, mechanical switch 5 disjunctions.Because of rectifying tube 6 is in forward bias, during mechanical switch 5 disjunctions, rectifying tube 6 conductings make that voltage is no more than 1.5 V between mechanical switch 5 contacts, can not produce electric arc.
Claims (4)
1. combination switch that has the rectifying tube extinguishing arc, comprise control circuit (7), mechanical switch drive circuit (8), switch element (9), control circuit (7) connects mechanical switch driving circuit (8), switch element (9) successively, switch element (9) connects control circuit (7), and it is characterized in that: described switch element (9) is by rectifying tube (6) and mechanical switch (5) formation in parallel.
2. a kind of combination switch that has the rectifying tube extinguishing arc according to claim 1 is characterized in that: described mechanical switch (5) is relay or A.C. contactor.
3. a kind of combination switch that has the rectifying tube extinguishing arc according to claim 1, it is characterized in that: the switching instruction (1) of described control circuit (7) receiving system, control circuit (7) obtains the sampled signal (4) of switch element (9), control circuit (7) is to mechanical switch drive circuit (8) output processing signals (2), and drive circuit (8) is to switch element (9) output drive signal (3).
4. a kind of combination switch that has the rectifying tube extinguishing arc according to claim 1 is characterized in that: described control circuit (7) comprises at least one digital signal processing chip and/or single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200752503U CN201994214U (en) | 2011-03-21 | 2011-03-21 | Combination switch with rectifying tube for arc extinction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200752503U CN201994214U (en) | 2011-03-21 | 2011-03-21 | Combination switch with rectifying tube for arc extinction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201994214U true CN201994214U (en) | 2011-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200752503U Expired - Fee Related CN201994214U (en) | 2011-03-21 | 2011-03-21 | Combination switch with rectifying tube for arc extinction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201994214U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136380A (en) * | 2011-03-21 | 2011-07-27 | 齐齐哈尔齐力达电子有限公司 | Arc extinction combination switch with rectifier tube |
-
2011
- 2011-03-21 CN CN2011200752503U patent/CN201994214U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136380A (en) * | 2011-03-21 | 2011-07-27 | 齐齐哈尔齐力达电子有限公司 | Arc extinction combination switch with rectifier tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110928 Termination date: 20170321 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |