CN202159630U - Arc extinction circuit of electromagnetic relay - Google Patents
Arc extinction circuit of electromagnetic relay Download PDFInfo
- Publication number
- CN202159630U CN202159630U CN2011202515521U CN201120251552U CN202159630U CN 202159630 U CN202159630 U CN 202159630U CN 2011202515521 U CN2011202515521 U CN 2011202515521U CN 201120251552 U CN201120251552 U CN 201120251552U CN 202159630 U CN202159630 U CN 202159630U
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- electromagnetic relay
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- diode
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Abstract
The utility model discloses an arc extinction circuit of an electromagnetic relay, wherein a first connection wire and a second connection wire are respectively extracted from the input end. The first connection wire is sequentially connected with a voltage converter D2, a resistor R6, a diode V3 and a capacitor C2, and further the first connection wire is sequentially connected with an optical coupler V4, a phase inverter D3, a voltage stabilizing diode V6 and a triode V7 and then connected with a grid electrode of an insulated gate bipolar transistor (IGBT) V9. The second connection wire is connected with a resistor R3 and a capacitor C1 which are connected in parallel and connected with the positive input end of a comparator D1 through a wire, the output end of the comparator D1 is connected with the input end of an electromagnetic relay K1, the input end of the electromagnetic relay K1 is connected with a diode V1 in parallel, and the output end of the electromagnetic relay K1 and a collector electrode and an emitter electrode of the IGBT V9 are respectively converged in one position to serve as the output end. The arc extinction circuit is reasonable in structure, effectively achieves arc extinction of the electromagnetic relay under large voltage, avoids arcing of contacts of the electromagnetic relay in the pull-in and release states, and is reliable in work.
Description
Technical field
The utility model relates to electromagnetic relay, relates in particular to a kind of electromagnetic relay crowbar circuit.
Background technology
The contact of electromagnetic relay is prone to produce the electric arc electric spark in course of action; Electric arc electric spark ablation contact; Cause the loose contact of contact; The loose contact of contact further produces the electric arc electric spark, amplifies so repeatedly to make electromagnetic relay short useful life, and the arc extinguishing problem is the subject matter that electromagnetic relay will solve always.Implementation structure is oversimplified, the volume miniaturization and electromagnetic relay is promptly wanted, and is operated in again under the high voltage loading condition, and contact arcing phenomenon (descending) is even more serious, is difficult to solve.
The utility model content
The purpose of the utility model provides a kind of electromagnetic relay crowbar circuit; Reach and eliminate the arcing phenomenon of small size electromagnetic relay in the high voltage load is switched; It is parallelly connected with semiconductor switch to be about to the electromagnetic relay contact switch, the connection, shutoff of controlling both through control circuit in proper order, after input powers up; Semiconductor switch is connected earlier, connects behind the electromagnetic relay; After the input outage, the electromagnetic relay contact discharges immediately, and semiconductor switch turn-offed after time-delay a period of time.Guarantee the action under the state of semiconductor power switch conducting all the time of electromagnetic relay contact, thereby through reducing the purpose that electromagnetic relay contact operation voltage has reached extinguishing arc.Because the semiconductor power switch operating time is short, can not bring common power consumption of semiconductor power device and heat dissipation problem simultaneously yet.
The technical scheme of the utility model is following:
A kind of electromagnetic relay crowbar circuit; Include input; Be added with direct voltage on the described input; It is characterized in that: from described input, draw first and second road wiring respectively, be connected to voltage changer D2, resistance R 6, diode V3 and capacitor C 2 successively in the first via wiring on the one hand; Be connected to the grid that inserts insulated gate bipolar transistor V9 behind optocoupler V4, inverter D3, voltage stabilizing didoe V6 and the triode V7 on the other hand in the first via wiring successively;
Be connected to resistance R parallel with one another 3 and capacitor C 1 in second tunnel wiring; Resistance R 3 and the positive input of capacitor C 1 through lead access comparator D1; The output of comparator D1 is connected to the input of electromagnetic relay K1; The input of electromagnetic relay K1 is parallel with diode V1, and the output of electromagnetic relay K1 is compiled in a place with the collector and emitter of insulated gate bipolar transistor V9 respectively, and as output.
Described electromagnetic relay crowbar circuit is characterized in that: described inverter D3 is made up of through the lead connection in series-parallel a plurality of not gates together.
The parallel connection of electromagnetic relay contact switch and semiconductor power switch, when input powers up, it is after electric capacity charging time-delay that electromagnetic relay coil powers up, and semiconductor power switch is directly connected, and has so just realized that semiconductor switch connects adhesive behind the contact switch earlier.Need the electromagnetic relay contact to discharge earlier during shutoff, break off behind the semiconductor power switch, do not having under the situation of bias supply, this circuit adopts electric capacity to carry out energy storage.
Utilize capacitance energy storage just to have following problem: the driving voltage of IGBT is determined by storage capacitor voltage in the circuit; Moment capacitance voltage in that IGBT switches on and off is not the voltage of stable state; But the transient process that capacitor charge and discharge changes; A process is from low to high arranged during charging, a process is from high to low arranged during discharge.On the low side when driving voltage, can cause IGBT at a critical conduction mode, tube voltage drop is raise, device loss is big, burns device easily.
The circuit of the utility model is suitably chosen storage capacitor, and the voltage stabilizing didoe of in the drive circuit of semiconductor power switch circuit, connecting utilizes voltage stabilizing didoe filtering to guarantee the range of safety operation of the voltage of drive circuit at IGBT.
The beneficial effect of the utility model:
The mode that the utility model effectively combines through semiconductor switch and electromagnetic relay contact; Circuit structure is reasonable; Effectively realize the extinguishing arc of electromagnetic relay under big voltage, avoided the arcing problem of contact under adhesive and release condition of electromagnetic relay, reliable operation.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Referring to Fig. 1; A kind of electromagnetic relay crowbar circuit includes input, is added with direct voltage on the input; From input, draw first and second road wiring respectively, be connected to voltage changer D2, resistance R 6, diode V3 and capacitor C 2 successively in the first via wiring on the one hand; Be connected to the grid that inserts insulated gate bipolar transistor V9 behind optocoupler V4, inverter D3, voltage stabilizing didoe V6 and the triode V7 on the other hand in the first via wiring successively;
Be connected to resistance R parallel with one another 3 and capacitor C 1 in second tunnel wiring; Resistance R 3 and the positive input of capacitor C 1 through lead access comparator D1; The output of comparator D1 is connected to the input of electromagnetic relay K1; The input of electromagnetic relay K1 is parallel with diode V1, and the output of electromagnetic relay K1 is compiled in a place with the collector and emitter of insulated gate bipolar transistor V9 respectively, and as output.
Inverter D3 is made up of through the lead connection in series-parallel 6 not gates together.
Below in conjunction with accompanying drawing the utility model is further described:
After input powers up, boost through voltage changer D2, then through diode V3, resistance R 10 gives capacitor C 2 chargings, and charging interval T1, capacitor C 2 voltages provide power supply for the drive circuit of whole semiconductor power device.V4 time grade of conducting of optocoupler simultaneously, 1 pin of inverter D3 is a low level, and 8 pin voltages are high level, and when this high level voltage during less than the voltage of voltage regulation of voltage-stabiliser tube V6, not conducting of triode V7, insulated gate bipolar transistor (IGBT) V9 does not work.
Along with the continuation charging of capacitor C 2, the high level of 8 pin of inverter D3 also continues to raise.When this high level voltage during, triode V7 conducting greater than the voltage of voltage regulation of voltage-stabiliser tube V6, insulated gate bipolar transistor (IGBT) V9 conducting work, this section charging interval that capacitor C 2 is charged to the voltage stabilizing value of voltage-stabiliser tube V6 is T2, and T2＜T1.
Input charges to C1 through R3 in addition, through comparator D1 upset behind the charging interval T3, diode V1 conducting, the coil of electromagnetic relay K1 powers up, electromagnetic relay K1 adhesive, pickup time T4.The driving power voltage of insulated gate bipolar transistor (IGBT) V9 is the charging voltage on the capacitor C 2 at this moment, has guaranteed that insulated gate bipolar transistor (IGBT) V9 reasonably working under the driving power voltage, has reduced switching loss.Make electromagnetic relay turn-on time greater than turn-on time of insulated gate bipolar transistor (IGBT) V9 through designing and calculating, promptly T3+T4＞T2 realizes connecting after semiconductor switch is connected electromagnetic relay earlier.
After the input outage, electromagnetic relay K1 coil directly cuts off the power supply, and the contact load of electromagnetic relay K1 is broken off T5 release time that has a contact.Capacitor C 2 begins discharge simultaneously; 1 pin of inverter D3 becomes high level from low level, and 4 pin of inverter D3 also become high level from low level, and this voltage passes through R8; R9 charges to C3; The time that is charged to the high-low level of inverter D3 is T6, and 5 pin of inverter D3 are low level always in the T6 time range, and 8 pin of inverter D3 are high level always like this.This high level is along with the discharge process of capacitor C 3 is reducing; When this high level is reduced to still the voltage stabilizing value greater than voltage-stabiliser tube V6; Triode V7 still keeps conducting; Insulated gate bipolar transistor (IGBT) V9 still connects work, and be T7 this section discharge time that capacitor C 2 discharges into the voltage stabilizing value of voltage-stabiliser tube V6.The driving power voltage of insulated gate bipolar transistor (IGBT) V9 is the discharge voltage on the capacitor C 2 at this moment, has guaranteed that insulated gate bipolar transistor (IGBT) reasonably working under the driving power voltage, has reduced switching loss.Through designing and calculating, make and realize T6＞T7＞T5 breaking off after the electromagnetic relay contact discharges insulated gate bipolar transistor (IGBT) switch earlier.
When capacitor C 2 discharged into the voltage stabilizing value less than voltage-stabiliser tube V6, triode V7 ended, and insulated gate bipolar transistor (IGBT) V9 breaks off.
Claims (2)
1. electromagnetic relay crowbar circuit; Include input; Be added with direct voltage on the described input; It is characterized in that: from described input, draw first and second road wiring respectively, be connected to voltage changer D2, resistance R 6, diode V3 and capacitor C 2 successively in the first via wiring on the one hand; Be connected to the grid that inserts insulated gate bipolar transistor V9 behind optocoupler V4, inverter D3, voltage stabilizing didoe V6 and the triode V7 on the other hand in the first via wiring successively;
Be connected to resistance R parallel with one another 3 and capacitor C 1 in second tunnel wiring; Resistance R 3 and the positive input of capacitor C 1 through lead access comparator D1; The output of comparator D1 is connected to the input of electromagnetic relay K1; The input of electromagnetic relay K1 is parallel with diode V1, and the output of electromagnetic relay K1 is compiled in a place with the collector and emitter of insulated gate bipolar transistor V9 respectively, and as output.
2. electromagnetic relay crowbar circuit according to claim 1 is characterized in that: described inverter D3 is made up of through the lead connection in series-parallel a plurality of not gates together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202515521U CN202159630U (en) | 2011-07-16 | 2011-07-16 | Arc extinction circuit of electromagnetic relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202515521U CN202159630U (en) | 2011-07-16 | 2011-07-16 | Arc extinction circuit of electromagnetic relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202159630U true CN202159630U (en) | 2012-03-07 |
Family
ID=45767256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202515521U Withdrawn - After Issue CN202159630U (en) | 2011-07-16 | 2011-07-16 | Arc extinction circuit of electromagnetic relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202159630U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254746A (en) * | 2011-07-16 | 2011-11-23 | 中国电子科技集团公司第四十研究所 | Electromagnetic relay arc extinguishing circuit |
-
2011
- 2011-07-16 CN CN2011202515521U patent/CN202159630U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254746A (en) * | 2011-07-16 | 2011-11-23 | 中国电子科技集团公司第四十研究所 | Electromagnetic relay arc extinguishing circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120307 Effective date of abandoning: 20130814 |
|
| RGAV | Abandon patent right to avoid regrant |