CN208796909U - One kind is for the small signal isolation control circuit of relay in number DC converter - Google Patents
One kind is for the small signal isolation control circuit of relay in number DC converter Download PDFInfo
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Abstract
One kind is connect for the small signal isolation control circuit of relay in number DC converter, including isolation coupling module, the input terminal of the isolation coupling module with the output end of level-one amplifying circuit, and the input terminal of the level-one amplifying circuit is control signal input；The output end of the isolation coupling module and the input terminal of second amplifying circuit connect, and the output end of the second amplifying circuit and the input terminal of voltage regulator circuit connect, and the output end of the voltage regulator circuit is relay control signal output end.The utility model integrated circuit is simple, realizes and is easy, low in cost；It is amplified using input information of the level-one amplifying circuit to optocoupler, increase input power, the output end of optocoupler is subjected to second level amplification again, prevent because optocoupler signal it is weak caused by control it is unstable, enhance the stability of entire circuit, the control voltage for finally providing standard after voltage regulator circuit pressure stabilizing for relay ensures that relay will not be damaged because of enabled change range of input voltage width, securely and reliably.
Description
Technical field
The utility model relates to electronic technology fields, and in particular to one kind is for the small signal of relay in number DC converter
Isolation control circuit.
Background technique
Mainly there is relay control mode in existing number DC converter: 1. relay enable signals and primary high pressure end
Altogether, this mode is at low cost, and control mode is simple；Disadvantage: digital DC converter and load communication be CAN communication, load end without
Method provides and the enable signal of primary high pressure end altogether, therefore can not be applied to number DC converter；
2. relay enable signal is provided by the master control IC of digital power, by light-coupled isolation control relay output；This
Mode advantage: circuit is simpler, and cost is relatively low；Disadvantage: control signal is directly provided by master control IC, and master control IC calorific value is big, right
DC converter reliability has an impact；In addition the case where input terminal is without voltage regulator circuit, damages relay there are overtension.
Utility model content
One, the technical issues of solving
It proposes a kind of using enabled small signal amplification circuit and relay input stabilizing circuit, it is ensured that the small signal of control loop
It can be effectively controlled, realize master control IC low-power consumption, generate heat small, relay driving voltage stabilization, improves the reliability of DC converter
For the small signal isolation control circuit of relay in number DC converter.
Two, specific technical solution
One kind is described for the small signal isolation control circuit of relay in number DC converter, including isolation coupling module
The input terminal of isolation coupling module is connect with the output end of level-one amplifying circuit, and the input terminal of the level-one amplifying circuit is control letter
Number input terminal；The output end of the isolation coupling module and the input terminal of second amplifying circuit connect, the second amplifying circuit
The connection of the input terminal of output end and voltage regulator circuit, the output end of the voltage regulator circuit are relay control signal output end.
The utility model is realized in this way: control signal voltage is smaller, controls after level-one amplifying circuit amplifies and expands stream
The input of isolation coupling module processed, the control signal after overcoupling is again after second amplifying circuit amplifies and expands stream by pressure stabilizing
The folding of relay is controlled after circuit pressure stabilizing shaping.
Preferably to realize the utility model, as optimization:
Filter circuit is also connected on the output end of the voltage regulator circuit.Guarantee the stability of output signal.
The level-one amplifying circuit is provided with triode Q3, and the base stage of triode Q3 connects after resistance R7 with control signal
It connects, emitter ground connection, collector is connect with the second input terminal of the isolation coupling module, and the first of the isolation coupling module is defeated
Enter end to connect with power end；Also bridging has resistance R8 between the base stage and emitter of the triode Q3.
Triode Q2 is provided in the second amplifying circuit, the base stage of triode Q2 after resistance R4 all the way
It is connect with first output end of isolation coupling module, another way is connect after resistance R1 with power end, the triode Q2's
Emitter ground connection, collector is connect with the input terminal of the voltage regulator circuit, between the base stage and emitter of the triode Q2
Bridging has resistance R6；The isolation coupling module second output terminal ground connection.
The voltage regulator circuit is provided with zener diode Z1, the plus earth of zener diode Z1, cathode and triode
The base stage of Q1 connects, and the zener diode Z1 cathode is the input terminal of voltage regulator circuit；
The collector of the triode Q1 is connect with power end, the output end of transmitting extremely voltage regulator circuit, in three pole
Also bridging has resistance R2 between the base stage and collector of pipe Q1.
The filter circuit is provided with filter capacitor C1, the output of voltage regulator circuit described in an end Jie of filter capacitor C1
On end, other end ground connection.
The isolation coupling module is photoelectrical coupler.
The utility model has the following beneficial effects: integrated circuit is simple, realizes and be easy, it is low in cost；Electricity is amplified using level-one
Road amplifies the input information of optocoupler, increases input power, then the output end of optocoupler is carried out second level amplification, prevents because of light
Coupling signal is weak to be caused to control unstable, is enhanced the stability of entire circuit, is finally relay after voltage regulator circuit pressure stabilizing
The control voltage of offer standard ensures that relay will not be damaged because of enabled change range of input voltage width, securely and reliably；It is whole
The control signal power that a circuit needs is low, can greatly reduce the power of main control chip, main control chip is effectively prevent to generate heat, and improves
Stability.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model
It can be easier to be readily appreciated by one skilled in the art with feature, to make the protection scope of the utility model apparent clear
Define.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
It is a kind of for the small signal isolation control circuit of relay in number DC converter, including isolation coupling as shown in Figure 1:
The input terminal of module, the isolation coupling module is connect with the output end of level-one amplifying circuit, the input of the level-one amplifying circuit
End is control signal input；The output end of the isolation coupling module and the input terminal of second amplifying circuit connect, the second level
The output end of amplifying circuit and the input terminal of voltage regulator circuit connect, and the output end of the voltage regulator circuit is relay control signal output
End；Filter circuit is also connected on the output end of the voltage regulator circuit.
As shown in Figure 2: wherein level-one amplifying circuit is provided with triode Q3, the base stage of triode Q3 after resistance R7 with
Signal connection is controlled, which has main control chip offer, emitter ground connection, the second input of collector and photoelectrical coupler
End connection, the first input end of the photoelectrical coupler is connect after resistance R3 with 12V power end, the first of photoelectrical coupler
Bridging has resistance R5 between input terminal and the second input terminal；Also bridging has resistance between the base stage and emitter of triode Q3
R8。
Triode Q2 is provided in second amplifying circuit, the base stage of triode Q2 after resistance R4 all the way with photoelectricity
First output end of coupler connects, and another way is connect after resistance R1 with 12V power end, the emitter ground connection of triode Q2,
The input terminal of collector and voltage regulator circuit connects, and is also grounded after capacitor C2 on the collector, in the base stage of the triode Q2
Bridging has resistance R6 between emitter；The isolation coupling module second output terminal ground connection.
The voltage regulator circuit is provided with zener diode Z1, the plus earth of zener diode Z1, cathode and triode
The base stage of Q1 connects, and the zener diode Z1 cathode is also connect with the emitter of triode；
The collector of the triode Q1 is connect with 12V power end, the output end of transmitting extremely circuit, triode Q1's
Emitter also connect with the anode of filter capacitor C1, the cathode of filter capacitor C1 ground connection, the triode Q1 base stage with
Also bridging has resistance R2 between collector.
Circuit theory: main control chip issues control signal, the control photoelectric coupling input after triode Q3 amplifies and expands stream
The switch of power supply is held, the output end of photoelectrical coupler filters, then by pressure stabilizing after triode Q2 amplifies and expands stream by capacitor C2
Diode Z1 pressure stabilizing, then through filter capacitor C1 filtering after outputting standard relay control signal, it is ensured that relay will not be because making
Energy change range of input voltage width damages；It realizes that the small signal of master control IC, low-power consumption are effectively isolated control relay, improves
The reliability of DC converter.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, subject to the scope of the utility model is defined by the following claims.
Claims (7)
1. one kind is for the small signal isolation control circuit of relay in number DC converter, including isolation coupling module, feature
Be: the input terminal of the isolation coupling module is connect with the output end of level-one amplifying circuit, the input of the level-one amplifying circuit
End is control signal input；
The output end of the isolation coupling module and the input terminal of second amplifying circuit connect, the output end of the second amplifying circuit
It is connect with the input terminal of voltage regulator circuit, the output end of the voltage regulator circuit is relay control signal output end.
2. according to claim 1 for the small signal isolation control circuit of relay in number DC converter, it is characterised in that:
Filter circuit is also connected on the output end of the voltage regulator circuit.
3. according to claim 1 for the small signal isolation control circuit of relay in number DC converter, it is characterised in that:
The level-one amplifying circuit is provided with triode Q3, and the base stage of triode Q3 is connect after resistance R7 with control signal, emits
Pole ground connection, collector connect with the second input terminal of the isolation coupling module, the first input end of the isolation coupling module and
Power end connection；Also bridging has resistance R8 between the base stage and emitter of the triode Q3.
4. according to claim 1 for the small signal isolation control circuit of relay in number DC converter, it is characterised in that:
Triode Q2 is provided in the second amplifying circuit, the base stage of triode Q2 is isolated with described all the way after resistance R4
The connection of the first output end of coupling module, another way are connect after resistance R1 with power end, the emitter ground connection of the triode Q2,
Collector is connect with the input terminal of the voltage regulator circuit, and bridging has resistance between the base stage and emitter of the triode Q2
R6；The isolation coupling module second output terminal ground connection.
5. according to claim 1 for the small signal isolation control circuit of relay in number DC converter, it is characterised in that:
The voltage regulator circuit is provided with zener diode Z1, the plus earth of zener diode Z1, the base stage of cathode and triode Q1
Connection, the zener diode Z1 cathode are the input terminal of voltage regulator circuit；
The collector of the triode Q1 is connect with power end, the output end of transmitting extremely voltage regulator circuit, in the triode Q1
Base stage and collector between also bridging have resistance R2.
6. according to claim 2 for the small signal isolation control circuit of relay in number DC converter, it is characterised in that:
The filter circuit is provided with filter capacitor C1, on the output end of voltage regulator circuit described in an end Jie of filter capacitor C1, separately
One end ground connection.
7. according to claim 1 for the small signal isolation control circuit of relay in number DC converter, it is characterised in that:
The isolation coupling module is photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635628.9U CN208796909U (en) | 2018-10-09 | 2018-10-09 | One kind is for the small signal isolation control circuit of relay in number DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821635628.9U CN208796909U (en) | 2018-10-09 | 2018-10-09 | One kind is for the small signal isolation control circuit of relay in number DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208796909U true CN208796909U (en) | 2019-04-26 |
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ID=66211658
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821635628.9U Active CN208796909U (en) | 2018-10-09 | 2018-10-09 | One kind is for the small signal isolation control circuit of relay in number DC converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729884A (en) * | 2019-10-09 | 2020-01-24 | 中国航空工业集团公司洛阳电光设备研究所 | Low-voltage switch control circuit |
| TWI753570B (en) * | 2019-09-13 | 2022-01-21 | 日商田中貴金屬工業股份有限公司 | Dc high voltage relay and contact material for dc high voltage relay |
-
2018
- 2018-10-09 CN CN201821635628.9U patent/CN208796909U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI753570B (en) * | 2019-09-13 | 2022-01-21 | 日商田中貴金屬工業股份有限公司 | Dc high voltage relay and contact material for dc high voltage relay |
| CN110729884A (en) * | 2019-10-09 | 2020-01-24 | 中国航空工业集团公司洛阳电光设备研究所 | Low-voltage switch control circuit |
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