CN201000824Y - Circuit for eliminating spark in relay contact - Google Patents
Circuit for eliminating spark in relay contact Download PDFInfo
- Publication number
- CN201000824Y CN201000824Y CNU2007201185759U CN200720118575U CN201000824Y CN 201000824 Y CN201000824 Y CN 201000824Y CN U2007201185759 U CNU2007201185759 U CN U2007201185759U CN 200720118575 U CN200720118575 U CN 200720118575U CN 201000824 Y CN201000824 Y CN 201000824Y
- Authority
- CN
- China
- Prior art keywords
- relay
- connecting point
- sequence controller
- sequential device
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a circuit for removing relay connecting point sparks, which solves the technical problems to remove carbide induced by residual sparks on a connecting point. The utility model comprises a relay, a bidirectional brake fluid body, a detector, a time sequence control unit, and a trigger source, wherein the bidirectional brake fluid body is connected with the relay, in order to remove instant conduction sparks before an open circuit and after a close circuit of the electromagnetic switch connecting point of the relay, the detector is connected with the bidirectional brake fluid body, a first sequence controller is connected with the detector, a second sequence controller is connected with the relay, the trigger source is connected with the first sequence controller and the second sequence controller, the first sequence controller and the second sequence controller removes the instant sparks before an open circuit and after a close circuit of the electromagnetic switch connecting point of the relay, and delays the conduction time and the cut-off time of the electromagnetic switch connecting point of the relay through the first sequence controller and the second sequence controller, to make the sparks remained on electromagnetic switch connecting point of the relay to induce the carbide, and the conduction internal resistance of the connecting point can be not increased and changed, thereby the service life of the relay connecting point is prolonged.
Description
Technical field
The utility model relates to a kind of elimination spark in relay contact circuit, is particularly postponed by two-way thyristor by the first sequential device, eliminates relay in open circuit back moment spark, and the second sequential device postpones trigger relay, eliminates before open circuit the moment spark.
Background technology
In the prior art as No. 427541, the novel patent announcement in Taiwan " the elimination circuit of spark in relay contact ", it discloses by voltage zero crossover point and current zero crossover point, send voltage crossing signal and electric current crossing signal respectively to control unit, by control unit according to voltage and current phase state, and produce a relay controlling signal, make its relay tip coil excitation/loss of excitation, in acting on magnitude of voltage and current value is zero moment, yet, this relay tip switch on closed circuit and the open circuit between, make the residual spark of electromagnetic switch contact of its relay cause carbide easily, and increase the conducting internal resistance of contact.
Summary of the invention
The purpose of this utility model is to provide a kind of elimination spark in relay contact circuit, and the technical problem that solve is that residual spark causes carbide on the elimination contact, the problem that causes the contact internal resistance to change.
Elimination spark in relay contact circuit of the present utility model has relay, includes:
Relay, cording have the electromagnetic switch contact.
Two-way thyristor is to be linked to relay.
Detector is to be linked to two-way thyristor.
Timing control unit is to include the first sequential device and the second sequential device, and first sequential device system is linked to detector, and second sequential device system is linked to relay.
The triggering source is to be linked to the first sequential device and the second sequential device, for triggering the first sequential device and the second sequential device start signal.
Two-way thyristor of the present utility model is that cross-over connection has AC power.
Detector of the present utility model detects cross-over connection in the AC power zero potential of two-way thyristor, and controls two-way thyristor conducting start.
The utility model compared with prior art, the electromagnetic switch contact of eliminating relay by the first sequential device and the second sequential device before open circuit with open circuit after moment spark, pass through the conducting of electromagnetic switch contact and the deadline of the first sequential device and the second sequential device delayed relay again, make the electromagnetic switch contact of its relay can not cause carbide by residual spark, and can not increase the conducting internal resistance that changes contact, and then prolong the relay tip life-span.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is relay cut-off circuit figure of the present utility model.
Fig. 3 is relay turning circuit figure of the present utility model.
Fig. 4 is that sequential of the present utility model is made cardon.
[primary clustering symbol description]
(1) the two-way thyristor of relay (11) electromagnetic switch contact (2)
(3) detector (4) timing control unit (41) first sequential devices
(411) diode (412) transistor (413) resistor
(414) capacitor (415) resistor (42) second sequential devices
(421) diode (422) transistor (423) resistor
(424) capacitor (425) resistor (5) triggering source
Embodiment
As shown in Figure 1 and Figure 2, the utility model system includes relay 1, two-way thyristor 2, detector 3, timing control unit 4 and triggering source 5, wherein:
Two-way thyristor 2 is to be linked to relay 1, and in two-way thyristor 2 cross-over connections AC power is arranged, with the electromagnetic switch contact 11 of eliminating relay 1 before open circuit and the moment conducting spark of closed circuit back.
Triggering source 5 is to be linked to the first sequential device 41 and the second sequential device 42, for triggering the first sequential device 41 and 42 starts of the second sequential device in conducting and end.
During use, when triggering source 5 is the direct current positive potential, as Fig. 3, shown in Figure 4, then pass through the diode 411 of the first sequential device 41, and trigger transistor 412 starts and start detector 3 conductings, at this moment, when the AC power that detects two-way thyristor 2 by detector 3 is zero potential, 3 of detectors send the two-way thyristor 2 of a controlling signal triggering and conducting, simultaneously, the direct current positive potential in triggering source 5, then the resistor 423 by the second sequential device 42 carries out current limliting, and produces the turn on delay time by capacitor 424 and resistor 425 integrating networks, triggers transistor 422 starts and the excitatory sequential of turn-on relay 1 solenoid, the electromagnetic switch contact 11 that makes its relay 1 is eliminated the closed circuit spark that produces of moment by two-way thyristor 2 before closed circuit.When triggering source 5 is the direct current zero potential, as shown in Figure 2, then pass through the diode 421 of the second sequential device 42, and by diode 421 repid discharge "off" transistors 422 start voltages, and the excitatory sequential of slew relay 1 solenoid, make electromagnetic switch contact 11 open circuits of its relay 1, simultaneously, the direct current zero potential in triggering source 5, then the resistor 423 by the first sequential device 41 postpones to end, and postpones deadline by resistor 425, and the 412 start times of delay crystal pipe, the electromagnetic switch contact 11 that makes its relay 1 is eliminated the moment spark that produced of open circuit by two-way thyristor 2 behind open circuit.
The electromagnetic switch contact 11 of eliminating relays 1 by the first sequential device 41 and the second sequential device 42 before open circuit with open circuit after moment spark, again, by 11 conductings of electromagnetic switch contact and the deadline of the first sequential device 41 and the second sequential device, 42 delayed relays 1, make the electromagnetic switch contact 11 of its relay 1 can not cause carbide by residual spark, and can not increase the conducting internal resistance that changes contact, and then prolong the 1 contact life-span of relay.
Claims (3)
1. eliminate the spark in relay contact circuit for one kind, have relay, it is characterized in that it comprises:
Two-way thyristor is to be linked to relay;
Detector is to be linked to two-way thyristor;
Timing control unit is to include the first sequential device and the second sequential device, and first sequential device system is linked to detector, and second sequential device system is linked to relay;
The triggering source is to be linked to the first sequential device and the second sequential device, for triggering the first sequential device and the second sequential device start signal.
2. elimination spark in relay contact circuit according to claim 1 is characterized in that: described two-way thyristor is that cross-over connection has AC power.
3. elimination spark in relay contact circuit according to claim 1 is characterized in that: described detector detects cross-over connection in the AC power zero potential of two-way thyristor, and controls two-way thyristor conducting start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201185759U CN201000824Y (en) | 2007-02-07 | 2007-02-07 | Circuit for eliminating spark in relay contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201185759U CN201000824Y (en) | 2007-02-07 | 2007-02-07 | Circuit for eliminating spark in relay contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201000824Y true CN201000824Y (en) | 2008-01-02 |
Family
ID=39015228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201185759U Expired - Fee Related CN201000824Y (en) | 2007-02-07 | 2007-02-07 | Circuit for eliminating spark in relay contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201000824Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270546A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Drive circuit of relay |
| CN102693873A (en) * | 2011-03-21 | 2012-09-26 | 东硕资讯股份有限公司 | Time parameter acquiring method for adjusting alternating current electrical potential switching sequence of relay |
-
2007
- 2007-02-07 CN CNU2007201185759U patent/CN201000824Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270546A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Drive circuit of relay |
| CN102693873A (en) * | 2011-03-21 | 2012-09-26 | 东硕资讯股份有限公司 | Time parameter acquiring method for adjusting alternating current electrical potential switching sequence of relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080102 Termination date: 20100207 |