CN105551886B - A kind of low-power relay drive circuit - Google Patents
A kind of low-power relay drive circuit Download PDFInfo
- Publication number
- CN105551886B CN105551886B CN201511028024.9A CN201511028024A CN105551886B CN 105551886 B CN105551886 B CN 105551886B CN 201511028024 A CN201511028024 A CN 201511028024A CN 105551886 B CN105551886 B CN 105551886B
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- China
- Prior art keywords
- resistance
- triode
- signal processing
- processing unit
- relay
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
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- Relay Circuits (AREA)
Abstract
The invention discloses a kind of low-power relay drive circuit, including signal processing unit and power amplification unit；Signal processing unit is connected by power amplification unit with relay coil.The present invention controls the power of the input signal of power amplification unit by signal processing unit, can significantly reduce the power consumption of relay coil, have the advantages that simple, reliability and low cost.
Description
Technical field
The present invention relates to a kind of low-power relay drive circuit.
Background technology
Electromagnetic relay is a kind of very widely used electric controling element.
What electromagnetic relay was typically made up of iron core, coil, armature, contact reed etc..Added necessarily at coil two ends
Certain electric current is will pass through in voltage, coil, so as to produce galvanomagnetic-effect, armature will be in the presence of electromagnetic attracting force gram
The pulling force for taking return spring is drawn to iron core, so that the movable contact with moving armature and stationary contact (normally opened contact) adhesive.When coil is disconnected
After electricity, the suction of electromagnetism also disappears therewith, and armature will return to original position in the reaction force of spring, make movable contact and original
Stationary contact (normally-closed contact) release come.So adhesive, release, so as to reach conducting in circuit, the purpose of cut-out.
The voltage that relay contact needs relay coil two ends to apply in action reaches the magnitude of voltage specified, and is referred to as
Pick-up voltage., it is necessary to maintain the position of contact after the completion of relay contact action, now need to apply at relay coil two ends
Minimum voltage be referred to as maintenance voltage.Therefore, in order to reduce the power consumption of relay coil, can relay contacts action after,
Reduce the voltage that coil two ends apply.
In the prior art, control the pick-up voltage of electromagnetic relay and safeguard that voltage is constant, therefore produce larger
Energy consumption.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of low-power relay drive circuit.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is, low-power relay drive circuit, including
Signal processing unit and power amplification unit；Signal processing unit is connected by power amplification unit with relay coil；
Signal processing unit includes resistance R1, R2, R3, electric capacity C1, diode D1 and triode Q1；
Diode D1 positive pole is connected with triode Q1 base stage；
Resistance R1 one end is relay drive signal input, and the resistance R1 other end is connected with resistance R2, R3 one end,
The resistance R2 other end is connected with diode D1 negative pole, and the resistance R3 other end is connected with triode Q1 colelctor electrode, electric capacity
C1 one end is connected to diode D1 negative pole, and the electric capacity C1 other ends are connected to triode Q1 emitter stage and this end is reference potential
End；
Power amplification unit includes resistance R4, R5, triode Q2, Q3；
Triode Q2 colelctor electrode is connected with positive source, base stage and the resistance R1 of the drive signal processing unit other end
Connection, emitter stage is connected with resistance R4, R5 one end, and the resistance R5 other end is connected to triode Q3 base stage, resistance R4's
The other end is connected to triode Q3 emitter stage and is connected simultaneously with reference potential end, triode Q3 colelctor electrode and relay
One end connection of driving coil.
Operation principle：
Signal processing unit, which is used to drive signal being divided into two stages, sends power amplification unit, power amplification list to
Member, the signal for signal processing unit to be sent is amplified, driving relay coil work.
Drive signal is directly delivered to power amplification unit by signal processing unit after drive signal is received；Treat after
After electrical equipment adhesive, the drive signal that signal processing unit output can be weaker to power amplification unit, reduction power amplification unit
Power output, so as to reduce the power consumption of relay coil.
Power amplification unit can drive relay coil to complete adhesive and the action kept according to the size of input signal.
The beneficial effects of the invention are as follows：
The power of the input signal of power amplification unit is controlled by signal processing unit, relay coil can be reduced
Power consumption.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation of low-power relay drive circuit embodiment of the present invention.
Fig. 2 is the key point voltage waveform diagram of low-power relay drive circuit embodiment of the present invention.
Embodiment
Fig. 1 is a kind of low-power relay drive circuit, and the 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, which is used to drive signal being divided into two stages, sends power amplification unit to；
Power amplification unit, the signal for signal processing unit to be sent is amplified, driving relay coil work.
As shown in Fig. 2 in signal processing unit, relay drive signal input is connected with resistance R1 one end, electricity
The resistance R1 other end is connected with resistance R2, R3 one end, and the resistance R2 other end is connected with electric capacity C1, diode D1, resistance R3's
The other end is connected with triode Q1 colelctor electrode, and the electric capacity C1 other end is connected with the reference potential of circuit, and diode D1 is just
Pole is connected with triode Q1 base stage, and triode Q1 emitter stage is connected with the reference potential of circuit.
In power amplification unit, triode Q2 colelctor electrodes are connected with power supply VCC；Triode Q2 base stages and signal transacting list
The output end of member is connected；Triode Q2 emitter stage is connected with resistance R4, R5 one end；The resistance R4 other end and the ginseng of circuit
Potential point is examined to be connected；The resistance R5 other end is connected with triode Q3 base stage；The reference of triode Q3 emitter stage and circuit
Potential point is connected；Triode Q3 emitter stage connects relay coil as the output port of circuit.
The course of work：
When relay drive signal input is low level, electric capacity C1 both end voltages are 0, triode Q1 base voltage
Turned off for 0, Q1, the output end output low potential of signal processing unit；When relay drive signal input is by low transition
During for high level, electric capacity C1 is slowly charged by resistance R1 and R2, and electric capacity C1 both end voltages slowly rise.In electric capacity C1 two ends electricity
Force down before diode D1 breakdown reverse voltage, the output end output voltage UA of signal processing unit is V1；As electric capacity C1
Both end voltage is risen above after diode D1 breakdown reverse voltage, and triode Q1 base stage obtains driving current, triode Q1
Begin to turn on, now the output end output voltage UA of signal processing unit is V2, wherein V2 is less than V1.
When signal processing unit output voltage UA is V1, power amplification circuit output end causes relay coil two ends electricity
Pressure UC is VC1, relay contact action.When the output voltage UA of signal processing unit is V2, power amplification circuit output end
So that relay coil both end voltage UC is VC2, VC2 is less than VC1, and now relay is in the holding phase, but coil power dissipation is reduced
(Fig. 3).
Invention described above embodiment, is not intended to limit the scope of the present invention..It is any in the present invention
Spirit and principle within modification, equivalent and the improvement made etc., should be included in the claim protection model of the present invention
Within enclosing.
Claims (1)
1. low-power relay drive circuit, it is characterised in that：Including signal processing unit and power amplification unit；The signal
Processing unit is connected by power amplification unit with relay coil；
The signal processing unit includes resistance R1, R2, R3, electric capacity C1, diode D1 and triode Q1；
Diode D1 positive pole is connected with triode Q1 base stage；
Resistance R1 one end is relay drive signal input, and the resistance R1 other end is connected with resistance R2, R3 one end, resistance
The R2 other end is connected with diode D1 negative pole, and the resistance R3 other end is connected with triode Q1 colelctor electrode, electric capacity C1 mono-
End is connected to diode D1 negative pole, and the electric capacity C1 other ends are connected to triode Q1 emitter stage and this end is reference potential end；
The power amplification unit includes resistance R4, R5, triode Q2, Q3；
Triode Q2 colelctor electrode is connected with positive source, and base stage and the resistance R1 of the drive signal processing unit other end connect
Connect, emitter stage is connected with resistance R4, R5 one end, the resistance R5 other end is connected to triode Q3 base stage, resistance R4's is another
One end is connected to triode Q3 emitter stage and is connected simultaneously with reference potential end, the drive of triode Q3 colelctor electrode and relay
One end connection of moving winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028024.9A CN105551886B (en) | 2015-12-30 | 2015-12-30 | A kind of low-power relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028024.9A CN105551886B (en) | 2015-12-30 | 2015-12-30 | A kind of low-power relay drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105551886A CN105551886A (en) | 2016-05-04 |
| CN105551886B true CN105551886B (en) | 2017-07-11 |
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ID=55831009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511028024.9A Active CN105551886B (en) | 2015-12-30 | 2015-12-30 | A kind of low-power relay drive circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN105551886B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252158A (en) * | 2016-09-19 | 2016-12-21 | 北京新能源汽车股份有限公司 | A kind of electromagnetic relay circuit |
| WO2021142705A1 (en) * | 2020-01-16 | 2021-07-22 | 深圳欣锐科技股份有限公司 | Circuit and method for controlling low power consumption of relay |
| CN113394053B (en) * | 2021-05-28 | 2024-02-23 | 联合汽车电子有限公司 | Low-side driving circuit of vehicle-mounted relay |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114218U (en) * | 1992-01-18 | 1992-08-26 | 张毓荪 | Electronic timing universal switch |
| CN2648580Y (en) * | 2003-10-10 | 2004-10-13 | 深圳市力量科技有限公司 | Intelligent contactless composite switch |
| US9310240B2 (en) * | 2011-03-22 | 2016-04-12 | Seiko Epson Corporation | Circuit device, integrated circuit and detection device |
| CN202712061U (en) * | 2012-07-10 | 2013-01-30 | 西安龙腾新能源科技发展有限公司 | Drive circuit of constant-current relay |
| CN104157477B (en) * | 2014-08-27 | 2016-06-08 | 西安华鑫电力设备有限责任公司 | A kind of electric motor operating mechanism |
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2015
- 2015-12-30 CN CN201511028024.9A patent/CN105551886B/en active Active
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| Publication number | Publication date |
|---|---|
| CN105551886A (en) | 2016-05-04 |
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