CN201976078U - Relay pulse signal driving circuit with turnoff protection - Google Patents
Relay pulse signal driving circuit with turnoff protection Download PDFInfo
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- CN201976078U CN201976078U CN2010206376896U CN201020637689U CN201976078U CN 201976078 U CN201976078 U CN 201976078U CN 2010206376896 U CN2010206376896 U CN 2010206376896U CN 201020637689 U CN201020637689 U CN 201020637689U CN 201976078 U CN201976078 U CN 201976078U
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Abstract
The utility model relates to a relay pulse signal driving circuit with turnoff protection, which comprises an alternating current coupled input circuit, a rectification circuit, a filtering circuit and a driving circuit, wherein the input end of the alternating current coupled input circuit is connected with the input end of the pulse signal; and the output end of the alternating current coupled input circuit is connected with the first input end of the driving circuit successively through the rectification circuit and the filtering circuit. The structural characteristics are as follows: the input end 2 of the driving circuit is provided with a protective circuit; the input end of the protective circuit is connected with a protection control port; and the output end of the protective circuit is connected with the input end 2 of the driving circuit. The utility model provides a turnoff protection circuit of the pulse signal driving relay for solving the problem of time delay turnoff of the pulse signal driving relay. The circuit has the characteristics of few elements, few control ports, simple circuit, low cost, high reliability and the like. The relay pulse signal driving circuit can be widely applied to water heaters, electrical appliances with electrical leakage detection, and electrical appliances, equipment and the like which need to be quickly protected.
Description
Technical field:
The utility model relates to relay pulse signal drive circuit, particularly a kind of relay pulse signal drive circuit with turn-off protection.Belong to the application electric technology field.
Background technology:
At present, the electrical equipment that a lot of quality requirements are higher or the electron plate of equipment, its relay drive circuit generally all is to adopt the pulse signal type of drive, mainly form, when control port input pulse signal, pulse signal is coupled to rectification circuit by the AC coupled input circuit by AC coupled input circuit, rectification circuit, filter circuit and drive circuit, behind over commutation, be input to filter circuit and carry out filtering, obtain a direct voltage, the input of drive current to drive circuit is provided.The characteristics of this pulse signal drive circuit are: the relay adhesive is to be driven by pulse signal; when pulse input signal unusual (as the signal control circuit fault; or the MCU deadlock etc.); when being in high level, low level or high-impedance state,, make in the drive circuit that triode can conducting because coupling capacitance has logical AC signal and cut off the effect of direct current signal; remain off; relay unclamps, and load is closed, thus protection electrical equipment.But there is following shortcoming in sort circuit: because filter capacitor discharge time-delay influence is arranged, the triode late release causes the turn-off time of relay to prolong; Like this needs immediately (or fast) turn off on the electrical equipment or equipment of load (electrical equipment of protecting fast as water heater, band electric apparatus of electric leakage protection or needs etc.), can not meet the demands.
The utility model content:
The purpose of this utility model; be to drive relay time delayed turn-off problem in order to solve pulse signal; a kind of relay pulse signal drive circuit with turn-off protection is provided; this circuit can be realized quick switching off load, has characteristics such as element is few, control port is few, circuit is succinct, cost is low, reliability height.
The purpose of this utility model can reach by taking following technical scheme:
The relay pulse signal drive circuit of band turn-off protection comprises AC coupled input circuit, rectification circuit, filter circuit and drive circuit; The input of AC coupled input circuit connects the input of pulse signal, and the output of AC coupled input circuit one of input by rectification circuit, filter circuit and drive circuit successively is connected; Its design feature is: two places at the input of drive circuit are provided with protective circuit, and the input of described protective circuit connects the protection control port, and two of the input of its output and drive circuit is connected.
The purpose of this utility model can reach by taking following technical scheme:
A kind of execution mode of the present utility model is: described AC coupled input circuit is formed by connecting by input resistance R1, coupling capacitance C1.
A kind of execution mode of the present utility model is: described rectification circuit is formed by connecting by diode D1, D2.
A kind of execution mode of the present utility model is: described filter circuit is made up of electrochemical capacitor EC1.
A kind of execution mode of the present utility model is: described drive circuit is by input resistance R2, R3, and pull down resistor R4 drives triode Q1, relay R EL1, and diode D4, load LOAD1 is formed by connecting.
A kind of execution mode of the present utility model is: described protective circuit is made up of diode D3; The junction that the end of diode D3 connects between input resistance R2, the R3 in protection control port, its other end and the described drive circuit is connected.
The beneficial effects of the utility model are:
The utility model is by being provided with a protective circuit; an i.e. protection of a diode and input control signal; overcome filter capacitor discharge time-delay influence; the problem that the relay turn-off time is long; realize quick switching off load function; this circuit have element few, need that control port is few, circuit is succinct, cost is low, the reliability advantages of higher, be specially adapted to the household electrical appliances control board.Can be widely used in that the electrical equipment, needs of water heater, band detection of electrical leakage protects fast etc. electrical equipment and equipment.
Description of drawings:
Fig. 1 is the circuit theory diagrams of a specific embodiment of the utility model.
Embodiment:
Specific embodiment:
With reference to Fig. 1, present embodiment comprises AC coupled input circuit 1, rectification circuit 2, filter circuit 3 and drive circuit 4; The input of AC coupled input circuit 1 connects the input of pulse signal, and the output of AC coupled input circuit 1 one of input by rectification circuit 2, filter circuit 3 and drive circuit 4 successively is connected; Two places at the input of drive circuit 4 are provided with protective circuit 5, and the input of described protective circuit 5 connects protection control port 51, and two of the input of its output and drive circuit 4 is connected.
In the present embodiment:
Described AC coupled input circuit 1 is formed by connecting by input resistance R1, coupling capacitance C1.Described rectification circuit 2 is formed by connecting by diode D1, D2.Described filter circuit 3 is made up of electrochemical capacitor EC1.Described drive circuit 4 is by input resistance R2, R3, and pull down resistor R4 drives triode Q1, relay R EL1, and diode D4, load LOAD1 is formed by connecting.Described protective circuit 5 is made up of diode D3; The end of diode D3 connects protection control port 51, and the junction between input resistance R2, the R3 in the other end and the described drive circuit 4 is connected.
The operation principle of present embodiment:
With reference to Fig. 1; in actual applications, the output of drive circuit 4 connects the control input end of relay, and the input of AC coupled input circuit 1 connects the input of pulse signal; be the control port 11 of external control device, the input of described protective circuit 5 connects protection control port 51.
When described control port 11 output pulse signals are given the input of AC coupled input circuit 1; by coupling capacitance C1 the alternating-current pulse signal is coupled to rectification circuit 2; after D1, D2 rectification; be input to filter circuit 3; after EC1 filtering; obtain a d. c. voltage signal; the input 41 of drive current to drive circuit 4 is provided; protecting control port 51 ends simultaneously is high-impedance state, does not influence drive circuit, and then input current is through behind R2, the R3; enter the Q1 base stage; the Q1 conducting, the relay adhesive, load LOAD1 connects.The characteristics of this pulse signal drive circuit are; the relay adhesive is driven by pulse signal, when pulse input signal unusual (as the signal control circuit fault, or MCU crashes etc.); when often being high level or low level or high-impedance state; because C1 has logical AC signal, cut off the effect of direct current signal, so Q1 can conducting; remain off; relay unclamps, and load is closed, thus protection electrical equipment.But sort circuit influences owing to there being the filter capacitor discharge to delay time, the triode late release, and the relay turn-off time is long, and this example increases by one and protects diode D3, realizes quick shutoff triode Q1, overcomes this problem.When needs unclamp relay immediately; when closing load; control port 11, protection control port 51 are low level simultaneously; then port 51 terminal voltages are 0V, and then the cathode voltage of diode is 0.7V immediately, and promptly 42 ends of drive circuit also are 0.7V; thereby triode Q1 ends immediately; relay unclamps immediately, closes load, plays protective effect immediately.
In sum, present embodiment can provide a kind of pulse signal to drive the relay cut-off protection circuit, solves pulse signal and drives relay time delayed turn-off problem, and this circuit has that element is few, control port is few, circuit is succinct, cost is low, the reliability advantages of higher.Can be widely used in water heater, the electrical equipment of band detection of electrical leakage, the quick electrical equipment of protecting of needs and equipment etc.
The above; it only is the preferable specific embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, all belonged to protection range of the present utility model.
Claims (6)
1. the relay pulse signal drive circuit of band turn-off protection comprises AC coupled input circuit (1), rectification circuit (2), filter circuit (3) and drive circuit (4); The input of AC coupled input circuit (1) connects the input of pulse signal, and the output of AC coupled input circuit (1) one of input by rectification circuit (2), filter circuit (3) and drive circuit (4) successively is connected; It is characterized in that: two places at the input of drive circuit (4) are provided with protective circuit (5), and the input of described protective circuit (5) connects protection control port (51), and two of the input of its output and drive circuit (4) is connected.
2. the relay pulse signal drive circuit of band turn-off protection according to claim 1 is characterized in that: described AC coupled input circuit (1) is formed by connecting by input resistance R1, coupling capacitance C1.
3. the relay pulse signal drive circuit of a kind of turn-off protection according to claim 1, it is characterized in that: described rectification circuit (2) is formed by connecting by diode D1, D2.
4. the relay pulse signal drive circuit of band turn-off protection according to claim 1 is characterized in that: described filter circuit (3) is made up of electrochemical capacitor EC1.
5. the relay pulse signal drive circuit of band turn-off protection according to claim 1 is characterized in that: described drive circuit (4) is by input resistance R2, R3, pull down resistor R4; drive triode Q1; relay R EL1, diode D4, load LOAD1 is formed by connecting.
6. the relay pulse signal drive circuit of band turn-off protection according to claim 1 is characterized in that: described protective circuit (5) is made up of diode D3; The junction that the end of diode D3 connects between input resistance R2, the R3 in protection control port (51), its other end and the described drive circuit (4) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206376896U CN201976078U (en) | 2010-11-30 | 2010-11-30 | Relay pulse signal driving circuit with turnoff protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206376896U CN201976078U (en) | 2010-11-30 | 2010-11-30 | Relay pulse signal driving circuit with turnoff protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201976078U true CN201976078U (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206376896U Expired - Fee Related CN201976078U (en) | 2010-11-30 | 2010-11-30 | Relay pulse signal driving circuit with turnoff protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201976078U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103034132A (en) * | 2011-10-09 | 2013-04-10 | 重庆中科芯亿达电子有限公司 | Three-channel driving circuit |
| CN111712146A (en) * | 2018-12-13 | 2020-09-25 | 韩国烟草人参公社 | Aerosol generating device and method for cutting off heater heating caused by abnormal operation |
-
2010
- 2010-11-30 CN CN2010206376896U patent/CN201976078U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103034132A (en) * | 2011-10-09 | 2013-04-10 | 重庆中科芯亿达电子有限公司 | Three-channel driving circuit |
| CN111712146A (en) * | 2018-12-13 | 2020-09-25 | 韩国烟草人参公社 | Aerosol generating device and method for cutting off heater heating caused by abnormal operation |
| US12096801B2 (en) | 2018-12-13 | 2024-09-24 | Kt&G Corporation | Aerosol-generating device and method for blocking heater heat caused by erroneous operation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY CO., Free format text: FORMER NAME: FOSHAN SHUNDE REALDESIGN ELECTRONICS INDUSTRY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528300 Shunde, Guangdong, Daliang Industrial Park, Fengxiang, Xiang Xiang Road, No. 1 Patentee after: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY CO., LTD. Address before: 528300 Guangdong province Foshan city Shunde District Daliang Industrial Park Fengxiang Huaye Road No. 1 Patentee before: Foshan Shunde Realdesign Electronics Industry Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20171130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |