CN205376403U - Undervoltage protection ware is crossed to relay drive circuit and self -resuming formula - Google Patents
Undervoltage protection ware is crossed to relay drive circuit and self -resuming formula Download PDFInfo
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- CN205376403U CN205376403U CN201620174332.6U CN201620174332U CN205376403U CN 205376403 U CN205376403 U CN 205376403U CN 201620174332 U CN201620174332 U CN 201620174332U CN 205376403 U CN205376403 U CN 205376403U
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Abstract
The utility model relates to an it includes signal connection point P1P2, relay coil RE1, resistance R1R4, electric capacity C1C2, triode Q1Q2 relay drive circuit, triode Q1's base is connected with relay coil RE1's port 5 through electric capacity C1, resistance R1 in proper order, and emitter ground is connected with relay coil RE1's port 1 to the collecting electrode, nodal connection between signal connection point P1 and resistance R1 and the electric capacity C1, the undervoltage protection ware is crossed to a self -resuming formula, sampling circuit is connected with the power supply circuit electricity, processing circuit is connected with the sampling circuit electricity, relay drive circuit and processing circuit electricity is connected, drives the relay according to processing circuit's result, when the relay maintains the stable state after, utilizes electric capacity C1C2's the characteristic that hinders the direct current, and drive circuit is at electric separation state, reliability height.
Description
Technical field
This utility model relates to a kind of electric product, particularly to a kind of relay drive circuit and self-recovering type overvoltage-undervoltage protector.
Background technology
Along with living standards of the people improve, user is to Electrical Safety pay attention to day by day.Self-recovering type overvoltage-undervoltage protector (hereinafter referred to as protector) suitable in the user of single-phase AC voltage 220V, frequency 50Hz and three-phase and four-line alternating voltage 400V, frequency 50Hz and load, protection to electrical equipment during as circuit generation overvoltage/undervoltage fault.
Main flow protector all adopts relay to complete, as defencive function execution unit, lower line disconnection of nonserviceabling in the market; but relay drive circuit now is complicated, component number is many, poor reliability, cost are high, it is unfavorable for that product promotion and user use.
For above-mentioned technical deficiency and use inconvenience, a relay drive circuit of ad hoc meter, simplify design, improve reliability and reduce cost.
Utility model content
In order to overcome the deficiency of background technology, this utility model provides a kind of relay drive circuit and self-recovering type overvoltage-undervoltage protector.
This utility model be the technical scheme is that a kind of relay drive circuit, it includes signal junction point P1/P2, relay coil RE1, resistance R1/R4, electric capacity C1/C2, audion Q1/Q2, the base stage of described audion Q1 is connected with the port 5 of relay coil RE1 through electric capacity C1, resistance R1 successively, colelctor electrode is connected with the port 1 of relay coil RE1, grounded emitter；The base stage of described audion Q2 is connected with the port 5 of relay coil RE1 through electric capacity C2, resistance R4 successively, and colelctor electrode is connected with the port 4 of relay coil RE1, grounded emitter；The port 5 of described relay coil RE1 is connected with VCC, and described signal junction point P1 is connected with the intermediate node of resistance R1 and electric capacity C1, and described signal junction point P2 is connected with the intermediate node of resistance R4 and electric capacity C2.
The base stage of described audion Q1 is connected with electric capacity C1 through resistance R2.
Being provided with resistance R3, the node between its one end with electric capacity C1 and resistance R2 is connected, and the other end is connected with the emitter stage of described audion Q1.
The base stage of described audion Q2 is connected with electric capacity C2 through resistance R5.
Being provided with resistance R6, the node between its one end with electric capacity C2 and resistance R5 is connected, and the other end is connected with the emitter stage of described audion Q2.
A kind of self-recovering type overvoltage-undervoltage protector, relay drive circuit, power circuit, sample circuit and signal processing circuit, described power circuit electrically connects with zero line N, live wire L respectively, and provides power supply for signal processing circuit；Described sample circuit electrically connects with power circuit, for signals collecting；Described signal processing circuit electrically connects with sample circuit, for signal processing；Described relay drive circuit electrically connects with signal processing circuit, according to the result of signal processing circuit, relay is driven.
The beneficial effects of the utility model are: signal junction point P2 described in the utility model is connected with the intermediate node of resistance R4 and electric capacity C2, initial setting signal junction point P1/P2, one of them is high level, one is low level, when low level is changed to high level, utilize the characteristic of the logical exchange of electric capacity C1/C2, corresponding triode ON, relay coil RE1 obtains electric, drive circuit drives relay switching main circuit state, after relay maintains stable state, utilize the characteristic of the resistance direct current of electric capacity C1/C2, drive circuit is in electrical isolation state, the electrical equipment that this kind of circuit relates to is few, simple in construction, it is provided simultaneously with electrical isolation function, reliability is high.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model embodiment is described further:
As shown in Figure 1, a kind of relay drive circuit, it includes signal junction point P1/P2, relay coil RE1, resistance R1/R4, electric capacity C1/C2, audion Q1/Q2, the base stage of described audion Q1 is connected with the port 5 of relay coil RE1 through electric capacity C1, resistance R1 successively, colelctor electrode is connected with the port 1 of relay coil RE1, grounded emitter；The base stage of described audion Q2 is connected with the port 5 of relay coil RE1 through electric capacity C2, resistance R4 successively, and colelctor electrode is connected with the port 4 of relay coil RE1, grounded emitter；The port 5 of described relay coil RE1 is connected with VCC, described signal junction point P1 is connected with the intermediate node of resistance R1 and electric capacity C1, described signal junction point P2 is connected with the intermediate node of resistance R4 and electric capacity C2, initial setting signal junction point P1/P2, one of them is high level, one is low level, when low level is changed to high level, utilize the characteristic of the logical exchange of electric capacity C1/C2, corresponding triode ON, relay coil RE1 obtains electric, drive circuit drives relay switching main circuit state, after relay maintains stable state, utilize the characteristic of the resistance direct current of electric capacity C1/C2, drive circuit is in electrical isolation state, the electrical equipment that this kind of circuit relates to is few, simple in construction, it is provided simultaneously with electrical isolation function, reliability is high.
Assuming that current steady state signal junction point P1 is high level (being called for short 1), signal junction point P2 is low level (being called for short 0), and owing to electric capacity C1/C2 has every straight effect, audion Q1/Q2 base stage is not high level, and audion Q1/Q2 is all not turned on, and relay maintains state；When signal junction point P2 is become 1 from 0, due to the characteristic of electric capacity C2, can be considered short circuit, audion Q2 base stage is applied in high level and turns on, relay switching main circuit state.
Assuming that current steady state signal junction point P1 is 0, signal junction point P2 is 1, and owing to electric capacity C1/C2 has every straight effect, audion Q1/Q2 base stage is not high level, and audion Q1/Q2 is all not turned on, and relay maintains state；When signal junction point P1 is become 1 from 0, due to the characteristic of electric capacity C1, can be considered short circuit, audion Q1 base stage is applied in high level and turns on, relay switching main circuit state.
Can pass through to regulate the value of resistance R1, the value of electric capacity C1 and/or resistance R3, electric capacity C2 simultaneously, change time constant, namely audion Q1 base stage and/or the pulsewidth of audion Q2 base stage high level signal it are applied to, namely it is applied to the pulsewidth on relay coil RE1, reliably switches main circuit state to relay.
The base stage of described audion Q1 is connected with electric capacity C1 through resistance R2, the base stage of described audion Q2 is connected with electric capacity C2 through resistance R5, resistance R2/R5 is used as current limliting, when electric capacity C1 or electric capacity C2 is considered as short circuit, the voltage of VCC is added on resistance R1/R2 or resistance R4/R5, the electric current being now added on audion Q1 or audion Q2 can be maintained in safety range, and base current can be prevented excessive.
Being provided with resistance R3/R6, resistance R3 one end to be connected with the node between electric capacity C1 and resistance R2, the other end is connected with the emitter stage of described audion Q1；Resistance R6 one end is connected with the node between electric capacity C2 and resistance R5, the other end is connected with the emitter stage of described audion Q2, it is used as when straight at electric capacity C1 or electric capacity C2, resistance R3 or resistance R6 does pull down resistor, by drop-down for the base voltage of the base stage or audion Q2 of stating audion Q1, it is ensured that the reliable turn-off of audion Q1 or audion Q2.
A kind of self-recovering type overvoltage-undervoltage protector, relay drive circuit, power circuit, sample circuit and signal processing circuit, described power circuit electrically connects with zero line N, live wire L respectively, and provides reliable source of power for signal processing circuit；Described sample circuit electrically connects with power circuit, by bleeder circuit, completes voltage real-time sampling；Described signal processing circuit electrically connects with sample circuit, carries out sampled voltage signal processing judgement and driving relay drive circuit by changing the level state of signal junction point P1 or signal junction point P2；Described relay drive circuit electrically connects with signal processing circuit, completes the driving of relay, display lamp or other execution units according to the result of signal processing circuit.
Being only preferred implementation of the present utility model above in association with the embodiment described by accompanying drawing, and not restriction to protection domain of the present utility model, any improvement done based on this utility model spirit all ought within this utility model protection domain.
Claims (6)
1. a relay drive circuit, it is characterized in that: it includes signal junction point P1/P2, relay coil RE1, resistance R1/R4, electric capacity C1/C2, audion Q1/Q2, the base stage of described audion Q1 is connected with the port 5 of relay coil RE1 through electric capacity C1, resistance R1 successively, colelctor electrode is connected with the port 1 of relay coil RE1, grounded emitter；The base stage of described audion Q2 is connected with the port 5 of relay coil RE1 through electric capacity C2, resistance R4 successively, and colelctor electrode is connected with the port 4 of relay coil RE1, grounded emitter；The port 5 of described relay coil RE1 is connected with VCC, and described signal junction point P1 is connected with the intermediate node of resistance R1 and electric capacity C1, and described signal junction point P2 is connected with the intermediate node of resistance R4 and electric capacity C2.
2. relay drive circuit according to claim 1, it is characterised in that: the base stage of described audion Q1 is connected with electric capacity C1 through resistance R2.
3. relay drive circuit according to claim 1, it is characterised in that: being provided with resistance R3, the node between its one end with electric capacity C1 and resistance R2 is connected, and the other end is connected with the emitter stage of described audion Q1.
4. relay drive circuit according to claim 1, it is characterised in that: the base stage of described audion Q2 is connected with electric capacity C2 through resistance R5.
5. relay drive circuit according to claim 1, it is characterised in that: being provided with resistance R6, the node between its one end with electric capacity C2 and resistance R5 is connected, and the other end is connected with the emitter stage of described audion Q2.
6. a self-recovering type overvoltage-undervoltage protector, it is characterised in that: it includes the relay drive circuit as described in claim 1-5, power circuit, sample circuit and signal processing circuit,
Described power circuit electrically connects with zero line N, live wire L respectively, and provides power supply for signal processing circuit；
Described sample circuit electrically connects with power circuit, for signals collecting；
Described signal processing circuit electrically connects with sample circuit, for signal processing；
Described relay drive circuit electrically connects with signal processing circuit, according to the result of signal processing circuit, relay is driven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174332.6U CN205376403U (en) | 2016-03-08 | 2016-03-08 | Undervoltage protection ware is crossed to relay drive circuit and self -resuming formula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174332.6U CN205376403U (en) | 2016-03-08 | 2016-03-08 | Undervoltage protection ware is crossed to relay drive circuit and self -resuming formula |
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| Publication Number | Publication Date |
|---|---|
| CN205376403U true CN205376403U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620174332.6U Active CN205376403U (en) | 2016-03-08 | 2016-03-08 | Undervoltage protection ware is crossed to relay drive circuit and self -resuming formula |
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| Country | Link |
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| CN (1) | CN205376403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590794A (en) * | 2016-03-08 | 2016-05-18 | 浙江天正电气股份有限公司 | Relay drive circuit and self-recovery overvoltage or undervoltage protector |
-
2016
- 2016-03-08 CN CN201620174332.6U patent/CN205376403U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590794A (en) * | 2016-03-08 | 2016-05-18 | 浙江天正电气股份有限公司 | Relay drive circuit and self-recovery overvoltage or undervoltage protector |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |