CN105590794A - Relay drive circuit and self-recovery overvoltage or undervoltage protector - Google Patents
Relay drive circuit and self-recovery overvoltage or undervoltage protector Download PDFInfo
- Publication number
- CN105590794A CN105590794A CN201610129289.6A CN201610129289A CN105590794A CN 105590794 A CN105590794 A CN 105590794A CN 201610129289 A CN201610129289 A CN 201610129289A CN 105590794 A CN105590794 A CN 105590794A
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- Prior art keywords
- capacitor
- resistance
- relay
- circuit
- drive circuit
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
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- Relay Circuits (AREA)
Abstract
The invention relates to a relay drive circuit which comprises the components of signal connecting points P1 and P2, a relay coil RE1, resistors R1 and R4, capacitors C1 and C2, and triodes Q1 and Q2. The base electrode of the triodes Q1 is connected with the port 5 of the relay coil RE1 through the capacitor C1 and the resistor R1 successively; the collector electrode is connected with the port 1 of the relay coil RE1; and the emitter electrode is grounded. A signal connecting point P1 is connected between the resistor R1 and the capacitor C1 in a node connection manner. The invention further provides a self-recovery overvoltage or undervoltage protector. A sampling circuit is electrically connected with a power circuit. A signal processing circuit is electrically connected with the sampling circuit. The relay drive circuit is electrically connected with the signal processing circuit. The relay is driven according to the processing result of the signal processing circuit. After the relay is kept in a stable state, by means of a DC blocking characteristic of the capacitors C1 and C2, the relay drive circuit is in an electrical isolated state, and high reliability is realized.
Description
Technical field
The present invention relates to a kind of electric product, particularly 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 to be referred as protector) is applicable to single phase ac voltage 220V, frequency 50Hz and three-phase and four-line alternating voltage 400V, the user of frequency 50Hz and load, the protection to consumer during as circuit generation overvoltage/undervoltage fault.
Main flow protector all adopts relay to complete as defencive function execution unit the lower line disconnection of nonserviceabling in the market; but relay drive circuit complexity now, component number are many, poor reliability, cost are high, are unfavorable for that product promotion and user use.
For above-mentioned technical deficiency and use inconvenience, a relay drive circuit of ad hoc meter, simplified design, raising reliability also reduce costs.
Summary of the invention
In order to overcome the deficiency of background technology, the invention provides a kind of relay drive circuit and self-recovering type overvoltage-undervoltage protector.
The technical solution adopted in the present invention is: a kind of relay drive circuit, it comprises signal tie point P1/P2, relay coil RE1, resistance R 1/R4, capacitor C 1/C2, triode Q1/Q2, the base stage of described triode Q1 is connected with the port 5 of relay coil RE1 through capacitor C 1, resistance R 1 successively, colelctor electrode is connected with the port one of relay coil RE1, grounded emitter; The base stage of described triode Q2 is connected with the port 5 of relay coil RE1 through capacitor C 2, resistance R 4 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 between described signal tie point P1 and resistance R 1 and capacitor C 1, node is connected, and between described signal tie point P2 and resistance R 4 and capacitor C 2, node is connected.
The base stage of described triode Q1 is connected with capacitor C 1 through resistance R 2.
Be provided with resistance R 3, its one end is connected with the node between capacitor C 1 and resistance R 2, and the other end is connected with the emitter stage of described triode Q1.
The base stage of described triode Q2 is connected with capacitor C 2 through resistance R 5.
Be provided with resistance R 6, its one end is connected with the node between capacitor C 2 and resistance R 5, and the other end is connected with the emitter stage of described triode Q2.
A kind of self-recovering type overvoltage-undervoltage protector, relay drive circuit, power circuit, sample circuit and signal processing circuit, described power circuit is electrically connected with zero line N, live wire L respectively, and provides power supply for signal processing circuit; Described sample circuit is electrically connected with power circuit, for signals collecting; Described signal processing circuit is electrically connected with sample circuit, for signal processing; Described relay drive circuit is electrically connected with signal processing circuit, according to the result of signal processing circuit, relay is driven.
The invention has the beneficial effects as follows: between signal tie point P2 of the present invention and resistance R 4 and capacitor C 2, node is connected, initial setting signal tie point P1/P2, one of them is high level, one is low level, in the time that low level is changed to high level, utilize the characteristic of the logical interchange of capacitor C 1/C2, corresponding triode conducting, relay coil RE1 obtains electric, drive circuit drives relay switch main circuit state, when relay maintains after stable state, utilize the characteristic of the resistance direct current of capacitor C 1/C2, drive circuit is in electrical isolation state, the electrical equipment that this kind of circuit relates to is few, simple in structure, possesses electrical isolation function simultaneously, reliability is high.
Brief description of the drawings
Fig. 1 is circuit diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated:
As shown in Figure 1, a kind of relay drive circuit, it comprises signal tie point P1/P2, relay coil RE1, resistance R 1/R4, capacitor C 1/C2, triode Q1/Q2, the base stage of described triode Q1 is connected with the port 5 of relay coil RE1 through capacitor C 1, resistance R 1 successively, colelctor electrode is connected with the port one of relay coil RE1, grounded emitter, the base stage of described triode Q2 is connected with the port 5 of relay coil RE1 through capacitor C 2, resistance R 4 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, between described signal tie point P1 and resistance R 1 and capacitor C 1, node is connected, between described signal tie point P2 and resistance R 4 and capacitor C 2, node is connected, initial setting signal tie point P1/P2, one of them is high level, one is low level, in the time that low level is changed to high level, utilize the characteristic of the logical interchange of capacitor C 1/C2, corresponding triode conducting, relay coil RE1 obtains electric, drive circuit drives relay switch main circuit state, when relay maintains after stable state, utilize the characteristic of the resistance direct current of capacitor C 1/C2, drive circuit is in electrical isolation state, the electrical equipment that this kind of circuit relates to is few, simple in structure, possesses electrical isolation function simultaneously, reliability is high.
Suppose that current steady-state signal tie point P1 is high level (being called for short 1), signal tie point P2 is low level (being called for short 0), and because capacitor C 1/C2 has every straight effect, triode Q1/Q2 base stage is not high level, all not conductings of triode Q1/Q2, and relay maintains state; When signal tie point P2 is when 0 becomes 1, due to the characteristic of capacitor C 2, can be considered short circuit, triode Q2 base stage is applied in high level and conducting, relay switch main circuit state.
Suppose that current steady-state signal tie point P1 is 0, signal tie point P2 is 1, and because capacitor C 1/C2 has every straight effect, triode Q1/Q2 base stage is not high level, all not conductings of triode Q1/Q2, and relay maintains state; When signal tie point P1 is when 0 becomes 1, due to the characteristic of capacitor C 1, can be considered short circuit, triode Q1 base stage is applied in high level and conducting, relay switch main circuit state.
Can pass through the value of the value of regulating resistance R1, capacitor C 1 and/or resistance R 3, capacitor C 2 simultaneously, change time constant, be applied to the pulsewidth of triode Q1 base stage and/or triode Q2 base stage high level signal, be applied to the pulsewidth on relay coil RE1, reliably switch main circuit state to relay.
The base stage of described triode Q1 is connected with capacitor C 1 through resistance R 2, the base stage of described triode Q2 is connected with capacitor C 2 through resistance R 5, resistance R 2/R5 is as current limliting, in the time that capacitor C 1 or capacitor C 2 are considered as short circuit, the voltage of VCC is added on resistance R 1/R2 or resistance R 4/R5, the electric current being now added on triode Q1 or triode Q2 can remain in safe range, can prevent that base current is excessive.
Be provided with resistance R 3/R6, resistance R 3 one end are connected with the node between capacitor C 1 and resistance R 2, and the other end is connected with the emitter stage of described triode Q1; Resistance R 6 one end are connected with the node between capacitor C 2 and resistance R 5, the other end is connected with the emitter stage of described triode Q2, be used as when straight in capacitor C 1 or capacitor C 2, resistance R 3 or resistance R 6 are done pull down resistor, to state the base stage of triode Q1 or the base voltage of triode Q2 is drop-down, ensure the reliable turn-off of triode Q1 or triode Q2.
A kind of self-recovering type overvoltage-undervoltage protector, relay drive circuit, power circuit, sample circuit and signal processing circuit, described power circuit is electrically connected with zero line N, live wire L respectively, and provides reliable source of power for signal processing circuit; Described sample circuit is electrically connected with power circuit, by bleeder circuit, completes voltage real-time sampling; Described signal processing circuit is electrically connected with sample circuit, and sampled voltage signal is processed judgement and driven relay drive circuit by the level state that changes signal tie point P1 or signal tie point P2; Described relay drive circuit is electrically connected with signal processing circuit, completes the driving of relay, indicator lamp or other execution units according to the result of signal processing circuit.
Below described embodiment is only the preferred embodiment of the present invention by reference to the accompanying drawings, and the not restriction to protection scope of the present invention, any improvement of doing based on spirit of the present invention all ought to be within protection domain of the present invention.
Claims (6)
1. a relay drive circuit, it is characterized in that: it comprises signal tie point P1/P2, relay coil RE1, resistance R 1/R4, capacitor C 1/C2, triode Q1/Q2, the base stage of described triode Q1 is connected with the port 5 of relay coil RE1 through capacitor C 1, resistance R 1 successively, colelctor electrode is connected with the port one of relay coil RE1, grounded emitter; The base stage of described triode Q2 is connected with the port 5 of relay coil RE1 through capacitor C 2, resistance R 4 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 between described signal tie point P1 and resistance R 1 and capacitor C 1, node is connected, and between described signal tie point P2 and resistance R 4 and capacitor C 2, node is connected.
2. relay drive circuit according to claim 1, is characterized in that: the base stage of described triode Q1 is connected with capacitor C 1 through resistance R 2.
3. relay drive circuit according to claim 1, is characterized in that: be provided with resistance R 3, its one end is connected with the node between capacitor C 1 and resistance R 2, and the other end is connected with the emitter stage of described triode Q1.
4. relay drive circuit according to claim 1, is characterized in that: the base stage of described triode Q2 is connected with capacitor C 2 through resistance R 5.
5. relay drive circuit according to claim 1, is characterized in that: be provided with resistance R 6, its one end is connected with the node between capacitor C 2 and resistance R 5, and the other end is connected with the emitter stage of described triode Q2.
6. a self-recovering type overvoltage-undervoltage protector, is characterized in that: it comprises relay drive circuit, power circuit, sample circuit and signal processing circuit as described in claim 1-5,
Described power circuit is electrically connected with zero line N, live wire L respectively, and provides power supply for signal processing circuit;
Described sample circuit is electrically connected with power circuit, for signals collecting;
Described signal processing circuit is electrically connected with sample circuit, for signal processing;
Described relay drive circuit is electrically connected 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 |
|---|---|---|---|
| CN201610129289.6A CN105590794A (en) | 2016-03-08 | 2016-03-08 | Relay drive circuit and self-recovery overvoltage or undervoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610129289.6A CN105590794A (en) | 2016-03-08 | 2016-03-08 | Relay drive circuit and self-recovery overvoltage or undervoltage protector |
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| Publication Number | Publication Date |
|---|---|
| CN105590794A true CN105590794A (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610129289.6A Pending CN105590794A (en) | 2016-03-08 | 2016-03-08 | Relay drive circuit and self-recovery overvoltage or undervoltage protector |
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| CN (1) | CN105590794A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201146364Y (en) * | 2008-01-28 | 2008-11-05 | 薛小平 | Self-recovering type voltage deviation protector |
| WO2014050060A1 (en) * | 2012-09-25 | 2014-04-03 | パナソニック株式会社 | Relay drive device |
| CN104021986A (en) * | 2014-05-27 | 2014-09-03 | 国网新疆伊犁供电有限责任公司 | Energy-saving double-coil magnetic latching relay device with differential driving circuit |
| CN204215966U (en) * | 2014-09-26 | 2015-03-18 | 艾默生电气公司 | Relay drive circuit and relay |
| CN205376403U (en) * | 2016-03-08 | 2016-07-06 | 浙江天正电气股份有限公司 | Undervoltage protection ware is crossed to relay drive circuit and self -resuming formula |
-
2016
- 2016-03-08 CN CN201610129289.6A patent/CN105590794A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201146364Y (en) * | 2008-01-28 | 2008-11-05 | 薛小平 | Self-recovering type voltage deviation protector |
| WO2014050060A1 (en) * | 2012-09-25 | 2014-04-03 | パナソニック株式会社 | Relay drive device |
| CN104021986A (en) * | 2014-05-27 | 2014-09-03 | 国网新疆伊犁供电有限责任公司 | Energy-saving double-coil magnetic latching relay device with differential driving circuit |
| CN204215966U (en) * | 2014-09-26 | 2015-03-18 | 艾默生电气公司 | Relay drive circuit and relay |
| CN205376403U (en) * | 2016-03-08 | 2016-07-06 | 浙江天正电气股份有限公司 | Undervoltage protection ware is crossed to relay drive circuit and self -resuming formula |
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Application publication date: 20160518 |