CN203659753U - Driving circuit of relay - Google Patents
Driving circuit of relay Download PDFInfo
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- CN203659753U CN203659753U CN201320838494.1U CN201320838494U CN203659753U CN 203659753 U CN203659753 U CN 203659753U CN 201320838494 U CN201320838494 U CN 201320838494U CN 203659753 U CN203659753 U CN 203659753U
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- 238000007796 conventional method Methods 0.000 description 1
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Abstract
The utility model discloses a driving circuit of a relay. The driving circuit of the relay comprises a time control circuit, a first control switch and a second control switch, an input terminal of the time control circuit, which is a control signal input terminal of the driving circuit, is connected with a control terminal of the first control switch, an output terminal of the time control circuit is connected with a control terminal of the second control switch so that the conduction time of the second control switch is controlled, and a voltage output terminal of the second control switch is respectively connected with a voltage output terminal of the first control switch and a control coil of the relay. According to the driving circuit of the relay, when the control coil is switched on, the threshold voltage is employed to supply power for the control coil, and after a certain time is delayed, a conduction voltage much lower than the rated voltage supplies power for the coil in an operating state so that the reliable switching-on of the coil is guaranteed, and the loss of the relay in the operating state is reduced.
Description
Technical field
The utility model relates to electric equipment control field, relates in particular to a kind of drive circuit of relay.
Background technology
Relay is used in electronic product in a large number as a kind of device of light current control forceful electric power, such as just adopting multiple relays as grid-connected and control device suspension between photovoltaic combining inverter output and electrical network.Conventional control method is the anode that relay control coil one end is connected to the DC power supply of a rated voltage, the other end is connected to the negative terminal of DC power supply by a NPN triode, carry out the break-make of control coil by controlling the base stage of triode, and then control relay switch.While adopting rated voltage power supply, can guarantee that relay is closed reliably, but in the time of on-state, relay coil will produce larger loss.Conventionally after relay closes, control coil only needs the half of rated voltage just can make relay in normal attracting state.But while adopting conventional method, coil power supply voltage maintains rated voltage always, and coil loss is very large.
Utility model content
The purpose of this utility model is to propose a kind of drive circuit of relay, solves above technical problem.
For reaching this object, the utility model by the following technical solutions:
A drive circuit for relay, comprising: time control circuit, the first control switch and the second control switch;
The input of described time control circuit connects the control end of described the first control switch, is the control signal input of drive circuit; The output of described time control circuit connects the control end of described the second control switch, for controlling the ON time of described the second control switch; The voltage output end of described the second control switch connects respectively one end of the voltage output end of described the first control switch and the control coil of relay, the other end ground connection of described control coil;
Wherein, the voltage input end of the voltage input end of described the first control switch and described the second control switch is respectively conducting voltage input and the cut-in voltage input of described drive circuit, the voltage output end that the voltage output end of described the second control switch is described drive circuit;
When work, the conducting voltage input of described drive circuit and cut-in voltage input be the first power output end and the second source output of connecting valve working power respectively; The control signal input of described drive circuit is connected with the controller that is used to described drive circuit to provide closed or disconnects the control signal of relay.
As a kind of preferred version, described the first control switch comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, switching tube Q1 and switching tube Q2; Described the second control switch comprises resistance R 5, resistance R 6, resistance R 8, switching tube Q3 and switching tube Q4;
The first end of resistance R 3 connects the input of described time control circuit, the control end of the second end difference connecting valve pipe Q2 of resistance R 3 and the first end of resistance R 4, the second end of the second end connecting valve pipe Q2 of resistance R 4, the second end ground connection of switching tube Q2, the first end of the first end contact resistance R2 of switching tube Q2, the first end of the second end difference contact resistance R1 of resistance R 2 and the control end of switching tube Q1, the second end of resistance R 1 is first end and described the first power output end of connecting valve pipe Q1 respectively;
The first end of resistance R 8 connects respectively the output of described time control circuit and the control end of switching tube Q4, the second end of the second end connecting valve pipe Q4 of resistance R 8, the second end ground connection of switching tube Q4, the first end of the first end contact resistance R6 of switching tube Q4, the first end of the second end difference contact resistance R5 of resistance R 6 and the control end of switching tube Q3, the second end of resistance R 5 is first end and the described second source output of connecting valve pipe Q3 respectively.
The second end of the second end difference connecting valve pipe Q1 of switching tube Q3 and one end of described control coil;
Wherein, when switching tube conducting, the first end of switching tube and the second end conducting; When switching tube disconnects, the first end of switching tube and the second not conducting of end.
As a kind of preferred version, described time control circuit comprises capacitor C 1, diode D2 and resistance R 7;
The first end of capacitor C 1 connects respectively the control signal output of described controller and the first end of resistance R 3, the second end of capacitor C 1 connects respectively the negative pole of diode D2 and the first end of resistance R 7, the first end of the second end contact resistance R8 of resistance R 7, the plus earth of diode D2;
Wherein, the input that the first end of capacitor C 1 is described time control circuit, the output that the second end of resistance R 7 is described time control circuit.
As a kind of preferred version, also comprise diode D1, the second end of the anodal connecting valve pipe Q1 of diode D1, the second end of the negative pole connecting valve pipe Q3 of diode D1.
Described switch power supply comprises power supply adaptor, and the power output end of this power supply adaptor provides respectively the first power output end and second source output.
As a kind of preferred version, switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are metal-oxide-semiconductor, IGBT pipe or triode.
As a kind of preferred version, switching tube Q1 and switching tube Q3 are positive-negative-positive triode, and switching tube Q2 and switching tube Q4 are NPN type triode;
The base stage of switching tube Q1 is the control end of switching tube Q1, and the transmitting of switching tube Q1 is the first end of switching tube Q1 very, and the current collection of switching tube Q1 is the second end of switching tube Q1 very; The base stage of switching tube Q3 is the control end of switching tube Q3, and the transmitting of switching tube Q3 is the first end of switching tube Q3 very, and the current collection of switching tube Q3 is the second end of switching tube Q3 very;
The base stage of switching tube Q2 is the control end of switching tube Q2, and the transmitting of switching tube Q2 is the second end of switching tube Q2 very, and the current collection of switching tube Q2 is the first end of switching tube Q2 very; The base stage of switching tube Q4 is the control end of switching tube Q4, and the transmitting of switching tube Q4 is the second end of switching tube Q4 very, and the current collection of switching tube Q4 is the first end of switching tube Q4 very.
As a kind of preferred version, the conducting voltage of described conducting voltage input input is less than the cut-in voltage of described cut-in voltage input input.
As more preferably scheme of one, the conducting voltage of described conducting voltage input input be described cut-in voltage input input cut-in voltage 1/2.
As one preferred version again, described cut-in voltage is 12V, and described conducting voltage is 6V.
The beneficial effects of the utility model: the method that adopts time sharing power supply is relay coil power supply, when online trap is closed, adopting cut-in voltage is control coil power supply, after time control circuit time delay certain hour, relay is in the time of normal attracting state, at this moment stop exporting cut-in voltage, be the control coil power supply in attracting state by another conducting voltage more much lower than cut-in voltage, so both guaranteed the reliable closure of control coil, reduce again the loss of relay in the time of attracting state, there is practical value widely, particularly using multiple relays and needing the occasion of controlling separately to have more advantage.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the drive circuit of the relay of embodiment.
Fig. 2 is the circuit structure diagram of the drive circuit of the relay of embodiment.
In figure: 10, the first control switch; 20, the second control switch; 30, time control circuit; 40, controller; 50, relay; 60, switch power supply.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.Be understandable that, specific embodiment described herein is only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, in accompanying drawing, only show the part relevant to the utility model but not full content.
Please refer to Fig. 1, Fig. 1 is the circuit theory diagrams of the drive circuit of the relay 50 of embodiment.The drive circuit that the present embodiment proposes, comprising: time control circuit 30, the first control switch 10 and the second control switch 20.
Drive circuit provides voltage input end, voltage output end and control signal input, the voltage input end of drive circuit comprises conducting voltage input and cut-in voltage input, and the voltage output end of drive circuit comprises the first power output end and second source output.
When work, the conducting voltage input of drive circuit and cut-in voltage input be the first power output end and the second source output of connecting valve working power 60 respectively; The control signal input of drive circuit connects the control signal output of controller 40, and controller 40 is used to drive circuit to provide closed or disconnects the control signal of relay 50.
In the time that drive circuit receives the control signal of closing relay 50, control drive circuit output cut-in voltage, after relay 50 closures, control drive circuit output conducting voltage by time control circuit 30; In the time that drive circuit receives the control signal that disconnects relay, now, drive circuit is output voltage not.
Concrete, please refer to Fig. 2, Fig. 2 is the circuit structure diagram of the drive circuit of the relay 50 of the first embodiment.
The first control switch 10 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, PNP triode Q1 and NPN triode Q2; The second control switch 20 comprises resistance R 5, resistance R 6, resistance R 8, PNP triode Q3 and NPN triode Q4.
The first end of resistance R 3 connects the input of time control circuit 30, the second end of resistance R 3 connects respectively the first end of base stage and the resistance R 4 of NPN triode Q2, the second end of resistance R 4 connects the emitter of NPN triode Q2, the grounded emitter of NPN triode Q2, the first end of the collector electrode contact resistance R2 of NPN triode Q2, the first end of the second end difference contact resistance R1 of resistance R 2 and the base stage of PNP triode Q1, the second end of resistance R 1 connects respectively the emitter of PNP triode Q1 and the first power output end of switch power supply 60, the first power output end is VCC1 end.
The first end of resistance R 8 connects respectively the base stage of output and the NPN triode Q4 of time control circuit 30, the second end of resistance R 8 connects the emitter of NPN triode Q4, the grounded emitter of NPN triode Q4, the first end of the collector electrode contact resistance R6 of NPN triode Q4, the first end of the second end difference contact resistance R5 of resistance R 6 and the base stage of PNP triode Q3, the second end of resistance R 5 connects respectively the emitter of PNP triode Q3 and the second source output of switch power supply 30, and second source output is VCC2 end.
The collector electrode of PNP triode Q3 connects respectively one end of the collector electrode of PNP triode Q1 and the control coil of relay 50;
When work, in the time that controller 40 is wanted closing relay 50, the control signal output output high level of controller 40, now, the input of the first end of resistance R 3 or time control circuit 30 is high level, control signal is added to NPN triode Q4 base stage by capacitor C 1 and resistance R 7, NPN triode Q4 conducting, after capacitor C 1 is full of, no longer includes electric current C1, the base potential of NPN triode Q4 will be drawn as electronegative potential by resistance R 8, and NPN triode Q4 closes or not conducting.Concrete delay time is determined by the parameter of capacitor C 1 and resistance R 7.In the time of closed relay, the control signal output output low level of controller 40, NPN triode Q4 is because the effect of resistance R 7 will keep closed condition, and electric energy in capacitor C 1 will discharge by diode D2 branch road.
Wherein, when NPN triode or the conducting of PNP triode, collector and emitter conducting; When NPN triode or the disconnection of PNP triode or not conducting, collector and emitter disconnects or not conducting.
Concrete, between PNP triode Q3 and PNP triode Q1, be also connected with diode D1.The positive pole of diode D1 connects the collector electrode of PNP triode Q1, and the negative pole of diode D1 connects the collector electrode of PNP triode Q3.
In the time that controller 40 is wanted closing relay 50, the control signal output output high level of controller 40, NPN triode Q4 and NPN triode Q2 conducting, move the base stage of NPN triode Q4 and NPN triode Q2 to electronegative potential respectively, now, PNP triode Q1 and PNP triode Q3 conducting, the collector voltage of PNP triode Q3 is cut-in voltage, the collector voltage of PNP triode Q1 is conducting voltage, because cut-in voltage is greater than conducting voltage, diode D1 is in cut-off state, only has cut-in voltage to be added to the control coil of relay 50, relay 50 closures.Postpone after certain hour by time control circuit 30, NPN triode Q4 will be in cut-off state, and PNP triode Q3 disconnects, now, PNP triode Q1 conducting, diode D1 conducting, conducting voltage replaces the control coil power supply that cut-in voltage is relay 50, makes control coil keep attracting state.
Concrete, switch power supply 60 comprises power supply adaptor, power supply adaptor provides the first power output end and second source output, is respectively drive circuit conducting voltage and cut-in voltage are provided.
In general, the conducting voltage of conducting voltage input input is less than the cut-in voltage of cut-in voltage input input, preferably, the value of the conducting voltage of relay 50 is 1/2 left and right of the value of cut-in voltage, the rated voltage of relay coil has multiple, such as having 24V, 12V, 6V, 9V equal-specification, preferred, it is 12V that the present embodiment can be selected cut-in voltage, and conducting voltage is 6V.
In common use of multiple relays 50, multiple relays 50 can common switch working power 60, just just can control the operating state of multiple relays with an adapter, but also reduce relay coil power consumption, a large amount of elements are not only saved, reduce industrial cost, also greatly increased the useful life of relay.
In the present embodiment, what switching tube Q1, Q2, Q3 and Q4 adopted is triode, is understandable that, switching tube Q1, Q2, Q3 and Q4 can also use the switching tube of metal-oxide-semiconductor, IGBT pipe or other types to replace, within should being included in protection range of the present utility model.
In the present embodiment, controller 30 can add by a DC power supply circuit mode realization of an ordinary tap, a resistance, also can provide control signal with signal generator.
In addition, as the inferior scheme of selecting of the present embodiment, the first control switch 10 and the first control switch 20 can be respectively by different control signal controls, now, and without using time control circuit 30, the conducting voltage that also can realize relay 50 is less than cut-in voltage, but the control signal of relay increases to two by one, the output policy of control signal is comparatively complicated, relates to the control problem of delay time, some also needs increase to realize as devices such as single-chip microcomputers, has increased design cost.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (9)
1. a drive circuit for relay, is characterized in that, comprising: time control circuit, the first control switch and the second control switch;
The input of described time control circuit connects the control end of described the first control switch, is the control signal input of drive circuit; The output of described time control circuit connects the control end of described the second control switch, for controlling the ON time of described the second control switch; The voltage output end of described the second control switch connects respectively one end of the voltage output end of described the first control switch and the control coil of relay, the other end ground connection of described control coil;
Wherein, the voltage input end of the voltage input end of described the first control switch and described the second control switch is respectively conducting voltage input and the cut-in voltage input of described drive circuit, the voltage output end that the voltage output end of described the second control switch is described drive circuit;
When work, the conducting voltage input of described drive circuit and cut-in voltage input be the first power output end and the second source output of connecting valve working power respectively; The control signal input of described drive circuit is connected with the controller that is used to described drive circuit to provide closed or disconnects the control signal of relay.
2. drive circuit according to claim 1, is characterized in that, described the first control switch comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, switching tube Q1 and switching tube Q2; Described the second control switch comprises resistance R 5, resistance R 6, resistance R 8, switching tube Q3 and switching tube Q4;
The first end of resistance R 3 connects the input of described time control circuit, the control end of the second end difference connecting valve pipe Q2 of resistance R 3 and the first end of resistance R 4, the second end of the second end connecting valve pipe Q2 of resistance R 4, the second end ground connection of switching tube Q2, the first end of the first end contact resistance R2 of switching tube Q2, the first end of the second end difference contact resistance R1 of resistance R 2 and the control end of switching tube Q1, the second end of resistance R 1 is first end and described the first power output end of connecting valve pipe Q1 respectively;
The first end of resistance R 8 connects respectively the output of described time control circuit and the control end of switching tube Q4, the second end of the second end connecting valve pipe Q4 of resistance R 8, the second end ground connection of switching tube Q4, the first end of the first end contact resistance R6 of switching tube Q4, the first end of the second end difference contact resistance R5 of resistance R 6 and the control end of switching tube Q3, the second end of resistance R 5 is first end and the described second source output of connecting valve pipe Q3 respectively
The second end of the second end difference connecting valve pipe Q1 of switching tube Q3 and one end of described control coil;
Wherein, when switching tube conducting, the first end of switching tube and the second end conducting; When switching tube disconnects, the first end of switching tube and the second not conducting of end.
3. drive circuit according to claim 2, is characterized in that, described time control circuit comprises capacitor C 1, diode D2 and resistance R 7;
The first end of capacitor C 1 connects respectively the control signal output of described controller and the first end of resistance R 3, the second end of capacitor C 1 connects respectively the negative pole of diode D2 and the first end of resistance R 7, the first end of the second end contact resistance R8 of resistance R 7, the plus earth of diode D2;
Wherein, the input that the first end of capacitor C 1 is described time control circuit, the output that the second end of resistance R 7 is described time control circuit.
4. drive circuit according to claim 3, is characterized in that, also comprises diode D1, the second end of the anodal connecting valve pipe Q1 of diode D1, the second end of the negative pole connecting valve pipe Q3 of diode D1.
5. drive circuit according to claim 4, is characterized in that, switching tube Q1, switching tube Q2, switching tube Q3 and switching tube Q4 are metal-oxide-semiconductor, IGBT pipe or triode.
6. drive circuit according to claim 5, is characterized in that, switching tube Q1 and switching tube Q3 are positive-negative-positive triode, and switching tube Q2 and switching tube Q4 are NPN type triode;
The base stage of switching tube Q1 is the control end of switching tube Q1, and the transmitting of switching tube Q1 is the first end of switching tube Q1 very, and the current collection of switching tube Q1 is the second end of switching tube Q1 very; The base stage of switching tube Q3 is the control end of switching tube Q3, and the transmitting of switching tube Q3 is the first end of switching tube Q3 very, and the current collection of switching tube Q3 is the second end of switching tube Q3 very;
The base stage of switching tube Q2 is the control end of switching tube Q2, and the transmitting of switching tube Q2 is the second end of switching tube Q2 very, and the current collection of switching tube Q2 is the first end of switching tube Q2 very; The base stage of switching tube Q4 is the control end of switching tube Q4, and the transmitting of switching tube Q4 is the second end of switching tube Q4 very, and the current collection of switching tube Q4 is the first end of switching tube Q4 very.
7. drive circuit according to claim 6, is characterized in that, the conducting voltage of described conducting voltage input input is less than the cut-in voltage of described cut-in voltage input input.
8. drive circuit according to claim 7, is characterized in that, the conducting voltage of described conducting voltage input input be described cut-in voltage input input cut-in voltage 1/2.
9. drive circuit according to claim 8, is characterized in that, described cut-in voltage is 12V, and described conducting voltage is 6V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838494.1U CN203659753U (en) | 2013-12-17 | 2013-12-17 | Driving circuit of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838494.1U CN203659753U (en) | 2013-12-17 | 2013-12-17 | Driving circuit of relay |
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| Publication Number | Publication Date |
|---|---|
| CN203659753U true CN203659753U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320838494.1U Expired - Lifetime CN203659753U (en) | 2013-12-17 | 2013-12-17 | Driving circuit of relay |
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| CN (1) | CN203659753U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946139A (en) * | 2017-12-20 | 2018-04-20 | 广汽丰田汽车有限公司 | The relay control system and method and vehicle of vehicle |
| CN108183048A (en) * | 2018-02-05 | 2018-06-19 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN108183049A (en) * | 2018-02-05 | 2018-06-19 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN108321019A (en) * | 2018-04-13 | 2018-07-24 | 深圳鹏城新能科技有限公司 | A kind of relay accelerates three level driving circuits of folding |
| CN109798630A (en) * | 2019-01-25 | 2019-05-24 | 青岛海信日立空调系统有限公司 | A kind of air-conditioning main control loop and air conditioner |
| CN110265260A (en) * | 2019-06-26 | 2019-09-20 | 浙江阿尔法电气有限公司 | A kind of frequency converter soft start contactor drive circuit |
| CN113394053A (en) * | 2021-05-28 | 2021-09-14 | 联合汽车电子有限公司 | Low-side drive circuit of vehicle-mounted relay |
-
2013
- 2013-12-17 CN CN201320838494.1U patent/CN203659753U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946139A (en) * | 2017-12-20 | 2018-04-20 | 广汽丰田汽车有限公司 | The relay control system and method and vehicle of vehicle |
| CN107946139B (en) * | 2017-12-20 | 2020-01-10 | 广汽丰田汽车有限公司 | Relay control system and method of vehicle and vehicle |
| CN108183048A (en) * | 2018-02-05 | 2018-06-19 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN108183049A (en) * | 2018-02-05 | 2018-06-19 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN108183049B (en) * | 2018-02-05 | 2019-07-30 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN108183048B (en) * | 2018-02-05 | 2019-08-16 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN108321019A (en) * | 2018-04-13 | 2018-07-24 | 深圳鹏城新能科技有限公司 | A kind of relay accelerates three level driving circuits of folding |
| CN109798630A (en) * | 2019-01-25 | 2019-05-24 | 青岛海信日立空调系统有限公司 | A kind of air-conditioning main control loop and air conditioner |
| CN110265260A (en) * | 2019-06-26 | 2019-09-20 | 浙江阿尔法电气有限公司 | A kind of frequency converter soft start contactor drive circuit |
| CN113394053A (en) * | 2021-05-28 | 2021-09-14 | 联合汽车电子有限公司 | Low-side drive circuit of vehicle-mounted relay |
| CN113394053B (en) * | 2021-05-28 | 2024-02-23 | 联合汽车电子有限公司 | Low-side driving circuit of vehicle-mounted relay |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20140618 |