CN204632671U - A kind of control relay circuit - Google Patents
A kind of control relay circuit Download PDFInfo
- Publication number
- CN204632671U CN204632671U CN201520247893.XU CN201520247893U CN204632671U CN 204632671 U CN204632671 U CN 204632671U CN 201520247893 U CN201520247893 U CN 201520247893U CN 204632671 U CN204632671 U CN 204632671U
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- Prior art keywords
- triode
- resistance
- relay
- voltage
- electric capacity
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Abstract
The utility model discloses a kind of control relay circuit, comprise resistance R1, resistance R2, electric capacity C1, triode VT1, diode D1 and relay K.The utility model utilizes the half of the maintenance voltage ratio pick-up voltage of relay also low, in the moment that relay is triggered, a sufficiently high instantaneous voltage is provided at the two ends of its control coil, thus make it reliablely and stablely work when low supply voltage is powered, save cost, be applicable to promoting the use of.
Description
Technical field
The utility model relates to a kind of control circuit, specifically a kind of control relay circuit.
Background technology
Relay requires that the control voltage be added on its coil can reliablely and stablely work higher than its pick-up voltage usually, therefore, in the control relay circuit that low supply voltage is powered, limit the use of high pick-up voltage relay, so, one group of high-voltage power supply have to be added separately for relay control circuit in addition, to meet the requirement of relay pick-up voltage, volume and cost can be increased like this.
Utility model content
The purpose of this utility model is to provide the control relay circuit under a kind of low-voltage, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of control relay circuit, comprise resistance R1, resistance R2, electric capacity C1, triode VT1, diode D1 and relay K, described resistance R1 one end connects input signal Ui, the resistance R1 other end is contact resistance R2 respectively, resistance R3 and ground capacity C1, the resistance R2 other end is contact resistance R4 respectively, resistance R6, resistance R7, switch S and triode VT4 emitter, described resistance R3 other end connecting triode VT1 base stage, triode VT1 collector electrode is the contact resistance R4 other end and triode VT2 base stage respectively, triode VT1 emitter connects earth resistance R5 and triode VT2 emitter respectively, triode VT2 collector electrode is the contact resistance R6 other end and diode D1 negative pole respectively, diode D1 positive pole connecting triode VT3 base stage, triode VT3 grounded emitter, triode VT3 collector electrode is the contact resistance R7 other end respectively, electric capacity C2 and resistance R8, the electric capacity C2 other end connects relay K coil and ground connection diode D2 positive pole respectively, relay K coil other end connecting triode VT4 collector electrode, the triode VT4 base stage contact resistance R8 other end, the described switch S other end connects power supply VCC.
As the utility model further scheme: described power supply VCC voltage is 12V.
Compared with prior art, the beneficial effects of the utility model are: the utility model utilizes the half of the maintenance voltage ratio pick-up voltage of relay also low, in the moment that relay is triggered, a sufficiently high instantaneous voltage is provided at the two ends of its control coil, thus make it reliablely and stablely work when low supply voltage is powered, save cost, be applicable to promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of control relay circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of control relay circuit, comprise resistance R1, resistance R2, electric capacity C1, triode VT1, diode D1 and relay K, resistance R1 one end connects input signal Ui, the resistance R1 other end is contact resistance R2 respectively, resistance R3 and ground capacity C1, the resistance R2 other end is contact resistance R4 respectively, resistance R6, resistance R7, switch S and triode VT4 emitter, described resistance R3 other end connecting triode VT1 base stage, triode VT1 collector electrode is the contact resistance R4 other end and triode VT2 base stage respectively, triode VT1 emitter connects earth resistance R5 and triode VT2 emitter respectively, triode VT2 collector electrode is the contact resistance R6 other end and diode D1 negative pole respectively, diode D1 positive pole connecting triode VT3 base stage, triode VT3 grounded emitter, triode VT3 collector electrode is the contact resistance R7 other end respectively, electric capacity C2 and resistance R8, the electric capacity C2 other end connects relay K coil and ground connection diode D2 positive pole respectively, relay K coil other end connecting triode VT4 collector electrode, the triode VT4 base stage contact resistance R8 other end, the described switch S other end connects power supply VCC.
Power supply VCC voltage is 12V.
Operation principle of the present utility model is: refer to Fig. 1, resistance R1 ~ R6, electric capacity C1, triode VT1 and triode VT2 forms Schmidt trigger testing circuit, for the various control signal shapings by input, produce a high level signal risen rapidly, resistance R7, triode VT5 and triode VT3 forms an electronic switch, resistance R8, electric capacity C2, triode VT6 and triode VT4 forms the drive circuit of high pick-up voltage relay, when the moment that switch S switches on power, electric capacity C1 is charged by resistance R2, because electric capacity C1 both end voltage can not be suddenlyd change, triode VT1 is ended because of base stage transient earthing, triode VT2 conducting, triode VT3 is in cut-off state, so, electric capacity C2 by resistance R7 and triode VT2 quick charge to supply voltage, triode VT4 ends, relay K coil no current passes through, when electric capacity C1 charges to triggering level (about the 3.67V) of Schmidt trigger, triode VT1 conducting, triode VT2 ends, the collector electrode of triode VT2 exports the precipitous high level signal voltage in a forward position, puncture triode VT5, make the rapid saturation conduction of triode VT3, the base stage of triode VT4 ties near short circuit to ground by the CE of resistance R8 and triode VT3, make triode VT4 saturation conduction, its collector voltage is close to supply voltage, simultaneously, the positive pole of electrochemical capacitor C2 is also tied near short circuit to ground by the CE of triode VT3.Owing to electric capacity C2 being filled with the supply voltage of positive polarity, so time its negative pole on current potential be negative potential, therefore the voltage being added to relay K coil two ends is approximately equal to the supply voltage (about about 24V) of twice, thus makes relay K reliably adhesive.Subsequently; electric capacity C2 is discharged to zero by the CE knot of triode VT3; after circuit start is stable; the voltage be added on relay K coil two ends is about about 12V; relay K is made to keep attracting state; inputting a negative voltage by R1 to Schmidt trigger testing circuit when controlled circuit breaks down makes triode VT1 end; triode VT2 conducting; triode VT3 ends; electric capacity C2 by resistance R7 and triode VT6 quick charge to supply voltage; triode VT4 ends, relay K coil losing electricity, and the action of relay K contact makes controlled circuit protected.After controlled circuit fault is eliminated, triode VT1 conducting, triode VT2 ends, triode VT3 and triode VT4 conducting, and relay K obtains electric adhesive, and relay contact makes controlled circuit recover normal operating conditions.
Claims (2)
1. a control relay circuit, comprise resistance R1, resistance R2, electric capacity C1, triode VT1, diode D1 and relay K, it is characterized in that, described resistance R1 one end connects input signal Ui, the resistance R1 other end is contact resistance R2 respectively, resistance R3 and ground capacity C1, the resistance R2 other end is contact resistance R4 respectively, resistance R6, resistance R7, switch S and triode VT4 emitter, described resistance R3 other end connecting triode VT1 base stage, triode VT1 collector electrode is the contact resistance R4 other end and triode VT2 base stage respectively, triode VT1 emitter connects earth resistance R5 and triode VT2 emitter respectively, triode VT2 collector electrode is the contact resistance R6 other end and diode D1 negative pole respectively, diode D1 positive pole connecting triode VT3 base stage, triode VT3 grounded emitter, triode VT3 collector electrode is the contact resistance R7 other end respectively, electric capacity C2 and resistance R8, the electric capacity C2 other end connects relay K coil and ground connection diode D2 positive pole respectively, relay K coil other end connecting triode VT4 collector electrode, the triode VT4 base stage contact resistance R8 other end, the described switch S other end connects power supply VCC.
2. control relay circuit according to claim 1, is characterized in that, described power supply VCC voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520247893.XU CN204632671U (en) | 2015-04-22 | 2015-04-22 | A kind of control relay circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520247893.XU CN204632671U (en) | 2015-04-22 | 2015-04-22 | A kind of control relay circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204632671U true CN204632671U (en) | 2015-09-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520247893.XU Expired - Fee Related CN204632671U (en) | 2015-04-22 | 2015-04-22 | A kind of control relay circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204632671U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104022A (en) * | 2017-05-04 | 2017-08-29 | 安徽庆恒信息科技有限公司 | Novel intelligent electric cooker |
-
2015
- 2015-04-22 CN CN201520247893.XU patent/CN204632671U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104022A (en) * | 2017-05-04 | 2017-08-29 | 安徽庆恒信息科技有限公司 | Novel intelligent electric cooker |
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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: 20150909 Termination date: 20160422 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |