CN202126969U - Relay driving circuit and device with same - Google Patents
Relay driving circuit and device with same Download PDFInfo
- Publication number
- CN202126969U CN202126969U CN2011202134178U CN201120213417U CN202126969U CN 202126969 U CN202126969 U CN 202126969U CN 2011202134178 U CN2011202134178 U CN 2011202134178U CN 201120213417 U CN201120213417 U CN 201120213417U CN 202126969 U CN202126969 U CN 202126969U
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- triode
- relay
- control signal
- signal interface
- capacitor
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Abstract
The utility model relates to a relay driving circuit, which comprises a second triode (TR2) electrically connected with a relay (RY1), a first control signal interface (I/O1) used for controlling communication and stopping of the second triode (TR2), a first triode (TR1), a second control signal interface (I/O2), a first capacitor (C1) and a second capacitor (C2). An emitting electrode of the first triode (TR1) is electrically connected with the second control signal interface (I/O2), a base electrode of the first triode (TR1) is connected with the first capacitor (C1) in series and then connected with the first control signal interface (I/O1), one end of the second capacitor (C2) is connected with a first circuit node (N1) between the first control signal interface (I/O1) and the base electrode of a first triode (TR1), and the other end of the second capacitor (C2) is connected with the ground. The relay driving circuit ensures that voltage of relay action driven by pulse can quickly mutate, thereby better improving safety of the relay driven by the pulse and prolonging service life of the pulse relay.
Description
Technical field
The utility model relates to a kind of drive circuit, especially a kind of pulse driving circuit of relay; The utility model also relates to a kind of device that comprises above-mentioned relay drive circuit.
Background technology
At present, the drive circuit of relay mainly is divided into two kinds of dc drive circuit and AC driving circuits (claim pulsed drive again, down with).Wherein, the DC driven mode is by high-low level control relay break-make, and after the relay adhesive, drive current still need be kept.The dc drive circuit of relay as shown in Figure 1; Comprise a triode (TR), a diode (D), a control signal interface (I/O)
, a feeder ear (Vcc) and two resistance; Wherein, The negative pole of diode (D) is electrically connected with the collector electrode of triode (RT), its plus earth, and relay (RY) is parallelly connected with diode (D).When control signal interface (I/O) inserted high level, triode (TR) blocked, relay (RY) outage, and when control signal interface (I/O) inserts low level, triode (TR) conducting, relay (RY) is opened.Pulse driving circuit needs the connection of the pulse control relay of certain frequency, loses pulse signal, no matter is that high level or low level direct current can break off relay.Especially the design of single-chip microcomputer with use because rugged environment interference, electromagnetic interference, space conducted interference, electrical network clutter, interference such as surge that cause of thundering all possibly cause SCM program to lose efficacy, and after the program inefficacy; Single-chip microcomputer is not then carried out normal statement; Cause normally control relay, for instance, the relay that drives when the dc drive circuit of conducting since SCM program lost efficacy and can't turn-off; And this relay that can't turn-off is exactly controlled when being heater element; Then can cause the heater element continuous operation and on fire, jeopardize Electrical Safety, the relay that adopts pulse driving circuit to drive then can be avoided the generation of above-mentioned situation.
The pulse driving circuit of relay as shown in Figure 2 comprises mainly that a triode (TR), negative pole are connected with triode (TR) collector electrode, the 3rd diode (D3) of plus earth, control signal interface (I/O) that one is connected with single-chip microcomputer, a feeder ear (Vcc), termination are gone into a node between control signal interface and the transistor base, second electric capacity (C2) of other end ground connection, be connected to first electric capacity (C1), first diode (D1) between control signal interface (I/O) and second electric capacity (C2) in turn.When the normal execute statement of single-chip microcomputer; Constantly generate pulse with high-low level, the formation alternating voltage makes first electric capacity (C1) thereby conducting drives relay (RY), when SCM program lost efficacy; Then no longer carry out the variation output of high-low level; Control signal interface (I/O) can only insert direct voltage so, and relay then can automatically shut down, and has played the effect of protection electrical equipment.So, be everlasting in the prior art and use pulse driving circuit between single-chip microcomputer and the relay, when the program that guarantees single-chip microcomputer receives from the interference of outside, can effectively turn-off the output of control signal.
But there is a shortcoming in the pulse driving circuit of relay shown in Figure 2, that is, its voltage that is added on the relay is slowly, and this just causes, and the strength of the actuating of relay also is slowly, and the contact of relay is burnt out because of sparking easily.
The utility model content
The purpose of the utility model is to overcome the existing shortcoming of prior art repeat circuit drive circuit; Proposing a kind of both can the assurance can effectively turn-off when control signal is unreliable; Can guarantee the relay pulse driving circuit that the voltage of control relay action can suddenly change fast again, have that fail safe is good, the advantage of long service life.The utility model also proposes a kind of device that has above-mentioned relay drive circuit.
For achieving the above object, first technical scheme that the utility model adopted is:
A kind of relay drive circuit; Comprise that second a triode TR2 who is electrically connected with relay R Y1, one are used to control the second triode TR2 conducting, the first control signal interface I/O1 that ends, first triode TR1, second control signal interface I/O2, one first capacitor C 1, second capacitor C 2; The emitter of the first triode TR1 is electrically connected with the second control signal interface I/O2, base stage is connected, and the first control signal interface I/O1 is inserted in described first electric capacity (C1) back; One termination of second capacitor C 2 is gone into one first circuit node N1 between the first control signal interface I/O1 and the first triode TR1 base stage, other end ground connection.
When the first control signal interface I/O1 inserted the pulse signal of certain frequency, 2 chargings of second capacitor C were in the charging process; The second control signal interface I/O2 keeps inserting high level; When second capacitor C 2 was accumulated to sufficiently high voltage, the second control signal interface I/O2 inserted low level, the then first triode TR1 moment conducting; And further drive the second triode TR2 conducting, relay power; Keep the first control signal interface I/O1 to insert the pulse signal of certain frequency, adjust the second control signal interface I/O2 and insert high level, then the voltage of relay can suddenly change to low fast; Be constant voltage if the first control signal interface I/O1 inserts, then no matter this voltage is height or low, because the 1 not conducting of first capacitor C, so the first not conducting of triode TR1, the relay no power.
Technique scheme can also further be optimized.
As preferably, relay drive circuit also comprises one the 3rd diode D3, and the negative pole of the 3rd diode D3 is electrically connected plus earth with the collector electrode of the second triode TR2.
As preferably, relay R Y1 is parallelly connected with the 3rd diode D3.
As preferably, be provided with one first resistance R 1 between the base stage of the first triode TR1 and the first circuit node N1.
As preferably, the collector electrode of the first triode TR1 inserts the base stage of the second triode TR2 through one the 3rd resistance R 3.
As preferably, the collector electrode of the first triode TR1 inserts feeder ear Vcc through one second resistance R 2.
As preferably, the second triode TR2 emitter inserts feeder ear Vcc.
As preferably, the first control signal interface (I/O1), the second control signal interface I/O2 are one-chip machine port.
Second technical scheme that the utility model adopted is:
A kind of device, comprise at least one relay, be used between the single-chip microcomputer of output relay control signal, the control signal delivery outlet that is arranged on single-chip microcomputer and the relay, make up described relay drive circuit like above-mentioned first technical scheme and with any one or more preferred versions.
Because the employing of technique scheme the utlity model has following advantage:
The utility model has increased by one second control signal interface I/O2 and has been mated on the basis of existing relay pulse driving circuit control circuit; The voltage that has guaranteed the actuating of relay can suddenly change fast; Better improve the fail safe of relay, prolonged the useful life of relay.
Description of drawings
Shown in Figure 1 is the circuit diagram of the dc drive circuit of a kind of relay of the prior art;
Shown in Figure 2 is the circuit diagram of the pulse driving circuit of a kind of relay of the prior art;
Fig. 3 is a kind of circuit diagram of the utility model;
Wherein: I/O1, the first control signal interface; I/O2, the second control signal interface; TR1, first triode; TR2, second triode; RY1, relay; Vcc, feeder ear; C1, first electric capacity; C2, second electric capacity; R1, first resistance; R2, second resistance; R3, the 3rd resistance; D1, first diode; D2, second diode; D3, the 3rd diode; N1, first circuit node; N2, second circuit node.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the utility model is further specified.
Relay drive circuit as shown in Figure 3; Comprise that second a triode TR2 who is electrically connected with relay R Y1, first triode TR1, one are used to control the second triode TR2 conducting, the first control signal interface I/O1 that ends, second a control signal interface I/O2; Wherein, the emitter of the first triode TR1 is electrically connected with the second control signal interface I/O2, base stage is connected, and the first control signal interface I/O1 is inserted in first capacitor C, 1 back, collector electrode inserts feeder ear Vcc through one second resistance R 2.
In the present embodiment, the first control signal interface I/O1, the second control signal interface I/O2 are one-chip machine port.The first control signal interface I/O1 is used for the pulse signal to drive circuit output certain frequency, and the second control signal interface I/O2 is used for to drive circuit output high level constant voltage signal and low level constant voltage signal.
Relay drive circuit comprises that also a termination of one second capacitor C, 2, the second capacitor C 2 goes into the first circuit node N1 between the first control signal interface I/O1 and the first triode TR1 base stage, other end ground connection.
Except that second capacitor C 2, also be provided with between the base stage of the first triode TR1 and the first control signal interface I/O1: first resistance R 1 between the base stage that is arranged on the first triode TR1 and the first circuit node N1, one are arranged on the first diode D1 between the first circuit node N1 and the second circuit node N2, second a diode D2 who is arranged between second circuit node N2 and the zero potential ground.The first diode D1 plays unidirectional conducting electro ultrafiltration, the second diode D2 is that voltage clamp effect, first resistance R 1 play the effect that filtering prevents interference signal for metering function, second capacitor C 2.
Relay drive circuit also comprises one the 3rd diode D3, and the negative pole of the 3rd diode D3 is electrically connected with the collector electrode of the second triode TR2, plus earth, and relay R Y1 is parallelly connected with the 3rd diode D3.
The collector electrode of the first triode TR1 inserts the base stage of the second triode TR2 through one the 3rd resistance R 3.The second triode TR2 emitter inserts feeder ear Vcc.
When the first control signal interface I/O1 inserted the pulse signal of certain frequency, 1 conducting of first capacitor C gave second capacitor C 2 chargings through the first diode D1; In the charging process, the second control signal interface I/O2 keeps inserting high level, when second capacitor C 2 is accumulated to sufficiently high voltage; The second control signal interface I/O2 inserts low level, the then first triode TR1 moment conducting, and further drive the second triode TR2 conducting; Relay power, and, guaranteed that the voltage of relay is enough high; Keep the first control signal interface I/O1 to insert the pulse signal of certain frequency, adjust the second control signal interface I/O2 and insert high level, then the voltage of relay can suddenly change to low fast; Be constant voltage if the first control signal interface I/O1 inserts, then no matter this voltage is height or low, first all not conductings of triode TR1, relay no power.
It is emphasized that; Single-chip microcomputer outputs to the first control signal interface I/O1 pulse signal and can not directly be generated by PWM, this be because, when single-chip microcomputer program occurs and lost efficacy; The setting of PWM still keeps original state; The PWM mouth still has pulse voltage output, and relay keeps conducting state, does not play the protective effect that program inefficacy relay cuts out automatically.
Should be understood that this embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should understand in addition; After the content of having read the utility model instruction; Those skilled in the art can do various changes or modification, be equal to replacement etc. the utility model, for example, and the type of drive of the PNP triode that the utility model is adopted; Replace with the type of drive of NPN triode, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (9)
1. relay drive circuit; Comprise that second triode (TR2) that is electrically connected with relay (RY1), one are used to the first control signal interface (I/O1) of controlling described second triode (TR2) conducting, ending; It is characterized in that: it also comprises one first triode (TR1), second control signal interface (I/O2), first electric capacity (C1), second electric capacity (C2); The emitter of described first triode (TR1) is electrically connected with the described second control signal interface (I/O2), base stage is connected, and the described first control signal interface (I/O1) is inserted in described first electric capacity (C1) back; One termination of described second electric capacity (C2) is gone into one first circuit node (N1) between described first control signal interface (I/O1) and described first triode (TR1) base stage, other end ground connection.
2. relay drive circuit according to claim 1 is characterized in that: it also comprises one the 3rd diode (D3), and the negative pole of described the 3rd diode (D3) is electrically connected plus earth with the collector electrode of second triode (TR2).
3. relay drive circuit according to claim 3 is characterized in that: described relay (RY1) is parallelly connected with described the 3rd diode (D3).
4. according to claim 1 or 2 or 3 described relay drive circuits, it is characterized in that: be provided with one first resistance (R1) between the base stage of described first triode (TR1) and described first circuit node (N1).
5. according to claim 1 or 2 or 3 described relay drive circuits, it is characterized in that: the collector electrode of described first triode (TR1) inserts the base stage of described second triode (TR2) through one the 3rd resistance (R3).
6. according to claim 1 or 2 or 3 described relay drive circuits, it is characterized in that: the collector electrode of described first triode (TR1) inserts feeder ear (Vcc) through one second resistance (R2).
7. according to claim 1 or 2 or 3 described relay drive circuits, it is characterized in that: described second triode (TR2) emitter inserts feeder ear (Vcc).
8. according to claim 1 or 2 or 3 described relay drive circuits, it is characterized in that: the described first control signal interface (I/O1), the second control signal interface (I/O2) are one-chip machine port.
9. device; Comprise at least one relay, be used for the single-chip microcomputer of output relay control signal, it is characterized in that: it also comprise between the control signal delivery outlet that is arranged on described single-chip microcomputer and the relay, like any described relay drive circuit in the claim 1～9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202134178U CN202126969U (en) | 2011-06-23 | 2011-06-23 | Relay driving circuit and device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202134178U CN202126969U (en) | 2011-06-23 | 2011-06-23 | Relay driving circuit and device with same |
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| Publication Number | Publication Date |
|---|---|
| CN202126969U true CN202126969U (en) | 2012-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202134178U Expired - Lifetime CN202126969U (en) | 2011-06-23 | 2011-06-23 | Relay driving circuit and device with same |
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| CN (1) | CN202126969U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247411A (en) * | 2013-05-21 | 2013-08-14 | 广州广电运通金融电子股份有限公司 | Electromagnet drive circuit |
| WO2014079007A1 (en) * | 2012-11-22 | 2014-05-30 | 李咏 | Charging device and charging control method therefor |
| CN104730969A (en) * | 2013-12-23 | 2015-06-24 | 重庆中科芯亿达电子有限公司 | Drive control integrated circuit special for microwave oven |
| WO2018006487A1 (en) * | 2016-07-05 | 2018-01-11 | 广州金升阳科技有限公司 | Contactor coil control circuit |
| CN108447734A (en) * | 2018-03-08 | 2018-08-24 | 厦门芯阳科技股份有限公司 | A kind of relay drive circuit and method of high reliability |
| CN109358294A (en) * | 2018-12-03 | 2019-02-19 | 国网新疆电力有限公司乌鲁木齐供电公司 | Cell batteries open circuit online monitoring system |
| CN109509680A (en) * | 2018-12-25 | 2019-03-22 | 深圳和而泰小家电智能科技有限公司 | Relay protection circuit |
| CN112039501A (en) * | 2020-08-28 | 2020-12-04 | 江苏徐工信息技术股份有限公司 | Pulse mode IO drive circuit |
-
2011
- 2011-06-23 CN CN2011202134178U patent/CN202126969U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079007A1 (en) * | 2012-11-22 | 2014-05-30 | 李咏 | Charging device and charging control method therefor |
| CN103247411A (en) * | 2013-05-21 | 2013-08-14 | 广州广电运通金融电子股份有限公司 | Electromagnet drive circuit |
| CN103247411B (en) * | 2013-05-21 | 2016-04-20 | 广州广电运通金融电子股份有限公司 | A kind of solenoid driver circuit |
| CN104730969A (en) * | 2013-12-23 | 2015-06-24 | 重庆中科芯亿达电子有限公司 | Drive control integrated circuit special for microwave oven |
| WO2018006487A1 (en) * | 2016-07-05 | 2018-01-11 | 广州金升阳科技有限公司 | Contactor coil control circuit |
| US10910182B2 (en) | 2016-07-05 | 2021-02-02 | Mornsun Guangzhou Science & Technology Co., Ltd. | Contactor coil control circuit |
| CN108447734A (en) * | 2018-03-08 | 2018-08-24 | 厦门芯阳科技股份有限公司 | A kind of relay drive circuit and method of high reliability |
| CN109358294A (en) * | 2018-12-03 | 2019-02-19 | 国网新疆电力有限公司乌鲁木齐供电公司 | Cell batteries open circuit online monitoring system |
| CN109509680A (en) * | 2018-12-25 | 2019-03-22 | 深圳和而泰小家电智能科技有限公司 | Relay protection circuit |
| CN112039501A (en) * | 2020-08-28 | 2020-12-04 | 江苏徐工信息技术股份有限公司 | Pulse mode IO drive circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |