CN205881816U - Low voltage driving circuit - Google Patents
Low voltage driving circuit Download PDFInfo
- Publication number
- CN205881816U CN205881816U CN201620798415.2U CN201620798415U CN205881816U CN 205881816 U CN205881816 U CN 205881816U CN 201620798415 U CN201620798415 U CN 201620798415U CN 205881816 U CN205881816 U CN 205881816U
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- CN
- China
- Prior art keywords
- resistance
- electric capacity
- relay
- triode
- audion
- 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 low voltage driving circuit, including resistance R1, electric capacity C1, relay K, diode D1, triode VT1 and triode VT2, the triode VT1 projecting pole VCC that connects respectively, resistance R1 and resistance R3, triode VT1 base connecting resistance R2, electric capacity C1 is connected respectively to the resistance R2 other end, the resistance R1 other end and triode VT2 collecting electrode, triode VT2 base is the connecting resistance R3 other end and electric capacity C2 respectively, diode D1 negative pole and ground connection are connected to the electric capacity C2 other end, the electric capacity C1 other end and relay K coil are connected respectively to diode D1 positive pole, triode VT2 collecting electrode is connected to the relay K coil other end. The utility model discloses the sustain voltage that utilizes the relay still will hang down than half of actuation voltage, is triggered in the twinkling of an eye at the relay, provides enough high instantaneous voltage at the both ends of its control coil to make it reliablely and stablely work under the condition of low mains voltage power supply, practiced thrift the electric energy, be fit for using widely.
Description
Technical field
This utility model relates to a kind of drive circuit, specifically a kind of low voltage drive circuit.
Background technology
Relay as the control element in electrical control, range widely, but the driving electric current of relay
More much bigger than its operating current, it is true that relay once adhesive, just can about the half of rated voltage reliably work
Make, but often to use unnecessary big power supply to power to it, waste electric energy greatly.
Utility model content
The purpose of this utility model is the low voltage drive circuit provided under a kind of low-voltage, to solve above-mentioned background skill
The problem proposed in art.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of low voltage drive circuit, including resistance R1, electric capacity C1, relay K, diode D1, audion VT1 and three poles
Pipe VT2, described audion VT1 emitter stage connects power supply VCC, resistance R1 and resistance R3 respectively, and audion VT1 base stage connects resistance
R2, the resistance R2 other end connects electric capacity C1, the resistance R1 other end and audion VT2 colelctor electrode respectively, and audion VT2 base stage is respectively
Connecting the resistance R3 other end and electric capacity C2, the electric capacity C2 other end connects diode D1 negative pole ground connection, and diode D1 positive pole is respectively
Connect the electric capacity C1 other end and relay K coil, relay K coil other end connecting triode VT2 colelctor electrode.
As further program of the utility model: described power supply VCC voltage is 6V.
As further program of the utility model: described audion VT1 is PNP triode.
As this utility model further scheme: described audion VT2 is NPN audion.
Compared with prior art, the beneficial effects of the utility model are: this utility model utilizes the holding voltage of relay
Lower than the half of pick-up voltage, in the moment that relay is triggered, provide one at the two ends of its control coil enough
High instantaneous voltage, so that it reliablely and stablely works in the case of low supply voltage is powered, has saved electric energy, is suitable for
Promote the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of low voltage drive circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
Refer to Fig. 1, in this utility model embodiment, a kind of low voltage drive circuit, including resistance R1, electric capacity C1, continues
Electrical equipment K, diode D1, audion VT1 and audion VT2, described audion VT1 emitter stage connects power supply VCC, resistance R1 respectively
With resistance R3, audion VT1 base stage connects resistance R2, and the resistance R2 other end connects electric capacity C1, the resistance R1 other end and three respectively
Pole pipe VT2 colelctor electrode, audion VT2 base stage connects the resistance R3 other end and electric capacity C2 respectively, and the electric capacity C2 other end connects two poles
Pipe D1 negative pole ground connection, diode D1 positive pole connects the electric capacity C1 other end and relay K coil respectively, relay K coil another
End connecting triode VT2 colelctor electrode；Described power supply VCC voltage is 6V；Described audion VT1 is PNP triode；Described audion
VT2 is NPN audion.
Operation principle of the present utility model is: refer to Fig. 1, and switch on power VCC, and electric capacity C1 passes through resistance R1, diode
D1 charges, and electric capacity C2 is charged by resistance R3, owing to electric capacity both end voltage can not be suddenlyd change, so, audion VT1 base stage and three poles
Pipe VT2 base stage all obtains a low level biasing, and audion VT1 turns on, and audion VT2 ends, and relay K obtains electric, but this
Time voltage do not reach the pick-up voltage of relay K coil, afterwards along with the charging of electric capacity C2, audion VT2 turns on, electric capacity C1's
Positive pole also by audion VT2 CE tie near short circuit to, (be approximately equal to electricity owing to having been charged with the voltage of positive polarity on electric capacity C1
Source VCC voltage), so time its negative pole on current potential be nagative potential, the voltage being therefore added to relay K coil two ends is approximately equal to
The power supply VCC voltage of twice, so that relay K reliably adhesive.
Claims (4)
1. a low voltage drive circuit, including resistance R1, electric capacity C1, relay K, diode D1, audion VT1 and audion
VT2, it is characterised in that described audion VT1 emitter stage connects power supply VCC, resistance R1 and resistance R3, audion VT1 base respectively
Pole connects resistance R2, and the resistance R2 other end connects electric capacity C1, the resistance R1 other end and audion VT2 colelctor electrode, audion respectively
VT2 base stage connects the resistance R3 other end and electric capacity C2 respectively, and the electric capacity C2 other end connects diode D1 negative pole ground connection, diode
D1 positive pole connects the electric capacity C1 other end and relay K coil, relay K coil other end connecting triode VT2 colelctor electrode respectively.
Low voltage drive circuit the most according to claim 1, it is characterised in that described power supply VCC voltage is 6V.
Low voltage drive circuit the most according to claim 1, it is characterised in that described audion VT1 is PNP triode.
Low voltage drive circuit the most according to claim 1, it is characterised in that described audion VT2 is NPN audion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620798415.2U CN205881816U (en) | 2016-07-22 | 2016-07-22 | Low voltage driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620798415.2U CN205881816U (en) | 2016-07-22 | 2016-07-22 | Low voltage driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205881816U true CN205881816U (en) | 2017-01-11 |
Family
ID=57698824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620798415.2U Expired - Fee Related CN205881816U (en) | 2016-07-22 | 2016-07-22 | Low voltage driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205881816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447734A (en) * | 2018-03-08 | 2018-08-24 | 厦门芯阳科技股份有限公司 | A kind of relay drive circuit and method of high reliability |
-
2016
- 2016-07-22 CN CN201620798415.2U patent/CN205881816U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447734A (en) * | 2018-03-08 | 2018-08-24 | 厦门芯阳科技股份有限公司 | A kind of relay drive circuit and method of high reliability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20170722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |