CN205376402U - Low -power consumption relay drive circuit - Google Patents
Low -power consumption relay drive circuit Download PDFInfo
- Publication number
- CN205376402U CN205376402U CN201521136637.XU CN201521136637U CN205376402U CN 205376402 U CN205376402 U CN 205376402U CN 201521136637 U CN201521136637 U CN 201521136637U CN 205376402 U CN205376402 U CN 205376402U
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- China
- Prior art keywords
- resistance
- audion
- signal processing
- processing unit
- relay
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- Withdrawn - After Issue
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Abstract
The utility model discloses a low -power consumption relay drive circuit, including signal processing unit and power amplifier unit, signal processing unit passes through power amplifier unit and is connected with relay coil, signal processing unit includes resistance R1, R2, R3, electric capacity C1, diode D1 and triode Q1, diode D1's positive pole and triode, resistance R5's the other end are connected to triode Q3's base, and resistance R4's the other end is connected to triode Q3's projecting pole and is connected with the reference potential end simultaneously, and triode Q3's collecting electrode is connected with the one end of the drive line chart of relay. The utility model discloses an incoming signal's of signal processing unit control power amplifying unit power can show the consumption that reduces relay coil, has advantage simple, reliable and with low costs.
Description
Technical field
This utility model relates to a kind of low-power relay drive circuit.
Background technology
Electromagnetic relay is very widely used a kind of electric controling element.
Electromagnetic relay is generally made up of iron core, coil, armature, contact reed etc..At coil two ends plus certain voltage, coil will pass through certain electric current, thus producing galvanomagnetic-effect, armature will overcome the pulling force of return spring to be drawn to iron core under the effect of electromagnetic attracting force, thus the movable contact with moving armature and stationary contact (normally opened contact) adhesive.When, after coil blackout, the suction of electromagnetism also disappears therewith, armature will return to original position at the counteracting force of spring, makes movable contact and the release of original stationary contact (normally-closed contact).Such adhesive, release, thus having reached the purpose of conducting in circuit, cut-out.
Relay contact needs the voltage that relay coil two ends apply to reach the magnitude of voltage specified when action, is referred to as pick-up voltage.After relay contact action completes, it is necessary to maintain the position of contact, the minimum voltage applied at relay coil two ends is now needed to be called maintenance voltage.Therefore, in order to reduce the power consumption of relay coil, it is possible to after relay contacts action, the voltage that coil two ends apply is reduced.
In the prior art, control the pick-up voltage of electromagnetic relay and safeguard that voltage is constant, therefore producing bigger energy consumption.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of low-power relay drive circuit.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is, low-power relay drive circuit, including signal processing unit and power amplification unit；Signal processing unit is connected with relay coil by power amplification unit；
Signal processing unit includes resistance R1, R2, R3, electric capacity C1, diode D1 and audion Q1；
The positive pole of diode D1 is connected with the base stage of audion；
Resistance R1 one end is relay drive signal input, the other end of resistance R is connected with one end of resistance R2, R3, the other end of resistance R2 is connected with the negative pole of diode D1, the other end of resistance R3 is connected with the colelctor electrode of audion Q1, electric capacity C1 one end is connected to the negative pole of diode D1, and the electric capacity C1 other end is connected to the emitter stage of audion Q1 and this end is reference potential end；
Power amplification unit includes resistance R4, R5, audion Q2, Q3；
The colelctor electrode of audion Q2 is connected with positive source, base stage is connected with the other end of the resistance R1 driving signal processing unit, emitter stage is connected with one end of resistance R4, R5, the other end of resistance R5 is connected to the base stage of audion Q3, the other end of resistance R4 is connected to the emitter stage of audion Q3 and is connected with reference potential end simultaneously, and the colelctor electrode of audion Q3 is connected with one end driving line chart of relay.
Operation principle:
Signal processing unit, for driving signal is divided into two stages send power amplification unit, power amplification unit to, is amplified for the signal sent here by signal processing unit, drives relay coil work.
Driving signal, after receiving driving signal, is directly delivered to power amplification unit by signal processing unit；After relay adhesive, the driving signal that signal processing unit output can be more weak, to power amplification unit, reduces the output of power amplification unit, thus reducing the power consumption of relay coil.
Power amplification unit can drive relay coil to complete the action of adhesive and maintenance according to the size of input signal.
The beneficial effects of the utility model are:
The power of the input signal of power amplification unit is controlled, it is possible to reduce the power consumption of relay coil by signal processing unit.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail.
Fig. 1 is the structured flowchart of this utility model low-power relay drive circuit embodiment.
Fig. 2 is the circuit diagram of this utility model low-power relay drive circuit embodiment.
Fig. 3 is the key point voltage waveform diagram of this utility model low-power relay drive circuit embodiment.
Detailed description of the invention
Fig. 1 is the block diagram of a kind of low-power relay drive circuit, and this circuit is made up of signal processing unit and power amplification unit.Wherein signal processing unit is connected with power amplification unit, and power amplification unit is connected with relay coil.
Signal processing unit is for being divided into two stages to send power amplification unit to driving signal；
Power amplification unit, is amplified for the signal sent here by signal processing unit, drives relay coil work.
In the circuit diagram of Fig. 2, in signal processing unit, relay drive signal input is connected with one end of resistance R1, the other end of resistance R1 is connected with resistance R2, R3 one end, the other end of resistance R2 is connected with electric capacity C1, diode D1, and the other end of resistance R3 is connected with the colelctor electrode of audion Q1, and the other end of electric capacity C1 is connected with the reference potential of circuit, the positive pole of diode D1 is connected with the base stage of audion Q1, and the emitter stage of audion Q1 is connected with the reference potential of circuit.
In power amplification unit, audion Q2 colelctor electrode is connected with power supply VCC；Audion Q2 base stage is connected with the outfan of signal processing unit；The emitter stage of audion Q2 is connected with one end of resistance R4, R5；The other end of resistance R4 is connected with the reference point of potential of circuit；The other end of resistance R5 is connected with the base stage of audion Q3；The emitter stage of audion Q3 is connected with the reference point of potential of circuit；The emitter stage of audion Q3, as the output port of circuit, connects relay coil.
Work process:
When relay drive signal input is low level, electric capacity C1 both end voltage is 0, and the base voltage of audion Q1 is 0, Q1 shutoff, the outfan output electronegative potential of signal processing unit；When relay drive signal input is high level by low transition, electric capacity C1 is slowly charged by resistance R1 and R2, and electric capacity C1 both end voltage slowly rises.Before the electric capacity C1 both end voltage breakdown reverse voltage lower than diode D1, the outfan output voltage UA of signal processing unit is V1；After electric capacity C1 both end voltage rises above the breakdown reverse voltage of diode D1, the base stage of audion Q1 obtains and drives electric current, and audion Q1 begins to turn on, and now the outfan output voltage UA of signal processing unit is V2, and wherein V2 is lower than V1.
When signal processing unit output voltage UA is V1, power amplification circuit outfan makes relay coil both end voltage UC be VC1, relay contact action.When the output voltage UA of signal processing unit is V2, power amplification circuit outfan make relay coil both end voltage UC be VC2, VC2 less than VC1, now relay is in the maintenance phase, but coil power dissipation reduces (Fig. 3).
Above-described this utility model embodiment, is not intended that the restriction to this utility model protection domain.Any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within claims of the present utility model.
Claims (1)
1. a low-power relay drive circuit, it is characterised in that: include signal processing unit and power amplification unit；Described signal processing unit is connected with relay coil by power amplification unit；
Described signal processing unit includes resistance R1, R2, R3, electric capacity C1, diode D1 and audion Q1；
The positive pole of diode D1 is connected with the base stage of audion；
Resistance R1 one end is relay drive signal input, the other end of resistance R is connected with one end of resistance R2, R3, the other end of resistance R2 is connected with the negative pole of diode D1, the other end of resistance R3 is connected with the colelctor electrode of audion Q1, electric capacity C1 one end is connected to the negative pole of diode D1, and the electric capacity C1 other end is connected to the emitter stage of audion Q1 and this end is reference potential end；
Described power amplification unit includes resistance R4, R5, audion Q2, Q3；
The colelctor electrode of audion Q2 is connected with positive source, base stage is connected with the other end of the resistance R1 driving signal processing unit, emitter stage is connected with one end of resistance R4, R5, the other end of resistance R5 is connected to the base stage of audion Q3, the other end of resistance R4 is connected to the emitter stage of audion Q3 and is connected with reference potential end simultaneously, and the colelctor electrode of audion Q3 is connected with one end driving line chart of relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136637.XU CN205376402U (en) | 2015-12-30 | 2015-12-30 | Low -power consumption relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136637.XU CN205376402U (en) | 2015-12-30 | 2015-12-30 | Low -power consumption relay drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205376402U true CN205376402U (en) | 2016-07-06 |
Family
ID=56275724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521136637.XU Withdrawn - After Issue CN205376402U (en) | 2015-12-30 | 2015-12-30 | Low -power consumption relay drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205376402U (en) |
-
2015
- 2015-12-30 CN CN201521136637.XU patent/CN205376402U/en not_active Withdrawn - After Issue
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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: 20160706 Effective date of abandoning: 20170711 |
|
| AV01 | Patent right actively abandoned |