CN206742152U - A kind of relay drive circuit - Google Patents
A kind of relay drive circuit Download PDFInfo
- Publication number
- CN206742152U CN206742152U CN201720543990.2U CN201720543990U CN206742152U CN 206742152 U CN206742152 U CN 206742152U CN 201720543990 U CN201720543990 U CN 201720543990U CN 206742152 U CN206742152 U CN 206742152U
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- CN
- China
- Prior art keywords
- electric capacity
- relay
- triode
- drive circuit
- switch
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of relay drive circuit.A kind of relay drive circuit includes switch S, first resistor R1, second resistance R2, the first electric capacity C1, the second electric capacity C2, diode D, triode Q, relay JK.The beneficial effect that the utility model is reached is, switch S, which opens moment, can carry out protection to the base stage of triode and will not be damaged；After switching S disconnections, counter electromotive force release can be accelerated, be unlikely to damage triode.
Description
Technical field
The utility model is related to relay driving field, more particularly to can quick release coil counter electromotive force cause
The relay drive circuit of the elevated adverse effect of voltage between NPN collector and emitter.
Background technology
It is the circuit diagram by Control motor movement of prior art as shown in Figure 1, when switch S presses conducting
When, it is with the presence of moment large impact electric current to triode Q base stage that power supply, which is, is easily damaged triode Q；On the other hand when switch
After S disconnects, relay KA coil has counter electromotive force, there is two current collections for being superimposed upon triode Q of supply voltage and counter electromotive force
Between pole and emitter stage, it is necessary to counter electromotive force is discharged as early as possible.
The content of the invention
Technical problem to be solved in the utility model is：On the one hand it is to open moment to be easily damaged triode；Separately
On the one hand after switching off, because relay JK coil has counter electromotive force, supply voltage and counter electromotive force two are superimposed upon
Between NPN pipes Q collector and emitter, triode can be also damaged.
In order to solve the above technical problems, the utility model provides a kind of relay drive circuit, including switch S, the first electricity
Hinder R1, second resistance R2, the first electric capacity C1, the second electric capacity C2, diode D, triode Q, relay JK：
Switch a S termination power 12V, another termination first resistor R1 one end；First resistor R1 another termination
The base stage of two resistance R2 one end, the first electric capacity C1 one end and triode Q, second resistance R2 other end ground connection, the first electricity
Hold C1 other end ground connection；Triode Q grounded emitter, colelctor electrode connect the second electric capacity C2 one end, diode D P poles and
Relay JK coil one end；Second electric capacity C2 another termination power 12V, diode D N poles meet power supply 12V, relay JK
Coil another termination power 12V, relay JK switch contacts part connect motor and alternating current 22V loops.
The beneficial effect that the utility model is reached is, switch S, which opens moment, to be protected to the base stage of triode
Shield will not be damaged；After switching S disconnections, counter electromotive force release can be accelerated, be unlikely to damage triode.
Brief description of the drawings
Fig. 1 is the relay drive circuit figure of prior art.
Fig. 2 is relay drive circuit figure of the present utility model.
Embodiment
The utility model content is further illustrated below in conjunction with drawings and examples.
A kind of relay drive circuit, as shown in Fig. 2 including switch S, first resistor R1, second resistance R2, the first electric capacity
C1, the second electric capacity C2, diode D, triode Q, relay JK：
Switch a S termination power 12V, another termination first resistor R1 one end；First resistor R1 another termination
The base stage of two resistance R2 one end, the first electric capacity C1 one end and triode Q, second resistance R2 other end ground connection, the first electricity
Hold C1 other end ground connection；Triode Q grounded emitter, colelctor electrode connect the second electric capacity C2 one end, diode D P poles and
Relay JK coil one end；Second electric capacity C2 another termination power 12V, diode D N poles meet power supply 12V, relay JK
Coil another termination power 12V, relay JK switch contacts part connect motor and alternating current 22V loops.
On the one hand due to having second resistance R2 and the first electric capacity C1, moment is opened in switch, the first electric capacity C1 is charged, filled
Triode ON when electricity arrives 0.7V, it is effectively protected the base stage of triode；On the other hand after switching off, due to relay JK
Coil there is counter electromotive force and diode to form a path to be discharged；The second electric capacity C2 is filled when switch is opened simultaneously
Electricity, connection power supply 12V ends are positive charges, and the second electric capacity C2 other ends are negative electrical charges, so just can be with counter electromotive force electric charge
Flowing can quickly eliminate counter electromotive force on the contrary, progress neutralization；Also because the first electric capacity C1 is after switch S disconnects, the
One electric capacity C1 is discharged, and continues to triode Q conducting states, until triode ends, relay coil out of power, contact is broken
Open, motor stops.
Element as shown in Figure 2, give a design parameter value or model：First resistor parameter is 47k Ω, second resistance
Parameter is 3k Ω, and the first electric capacity C1 parameters are 220 μ F/25V, the second electric capacity C2 parameters are 220 μ F/25V, diode is
1N4007, triode 9014, relay model use DELIXI JQX-13F.
Only it is the explanation of preferred embodiment of the present utility model, to this to the explanation of above-mentioned provided embodiment
It can be realized from the description above or using the present invention for those skilled in the art.It should be pointed out that for this skill
For the technical staff in art field, on the premise of the utility model technical principle is not departed from, can also make it is some improvement and
Deformation, any innovation and creation without departing from the range of true spirit, should be regarded as the scope of protection of the utility model.
Claims (1)
- A kind of 1. relay drive circuit, it is characterised in that：Including switch S, first resistor R1, second resistance R2, the first electric capacity C1, the second electric capacity C2, diode D, triode Q, relay JK；Switch a S termination power 12V, another termination first resistor R1 one end；The first resistor R1 electricity of another termination second Hinder R2 one end, the first electric capacity C1 one end and triode Q base stage, second resistance R2 other end ground connection, the first electric capacity C1 The other end ground connection；Triode Q grounded emitter, colelctor electrode connect the second electric capacity C2 one end, diode D P poles and relay Device JK coil one end；Second electric capacity C2 another termination power 12V, diode D N poles connect power supply 12V, relay JK line Another termination power 12V is enclosed, relay JK switch contacts part connects motor and alternating current 22V loops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720543990.2U CN206742152U (en) | 2017-05-16 | 2017-05-16 | A kind of relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720543990.2U CN206742152U (en) | 2017-05-16 | 2017-05-16 | A kind of relay drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206742152U true CN206742152U (en) | 2017-12-12 |
Family
ID=60564724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720543990.2U Expired - Fee Related CN206742152U (en) | 2017-05-16 | 2017-05-16 | A kind of relay drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206742152U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323812A (en) * | 2019-04-11 | 2019-10-11 | 郑州旭洲电子科技有限公司 | A kind of electric automobile charging pile driving circuit |
-
2017
- 2017-05-16 CN CN201720543990.2U patent/CN206742152U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323812A (en) * | 2019-04-11 | 2019-10-11 | 郑州旭洲电子科技有限公司 | A kind of electric automobile charging pile driving circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20180516 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |