CN106300251B - device and method for relay - Google Patents
device and method for relay Download PDFInfo
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- CN106300251B CN106300251B CN201510272219.1A CN201510272219A CN106300251B CN 106300251 B CN106300251 B CN 106300251B CN 201510272219 A CN201510272219 A CN 201510272219A CN 106300251 B CN106300251 B CN 106300251B
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Abstract
Embodiment of the disclosure provides a kind of device for relay, including logic unit, the logic unit has first input end and the second input terminal, fault detection unit, the fault detection unit is configured to respond to the fault-signal detected, the first signal is inputted to the first input end, tripping energy unit, the tripping energy unit is connected to the relay, and it is configured as when the voltage of the tripping energy unit is more than predetermined threshold, second signal is inputted to second input terminal, and switch unit, the switch unit is configured to respond to the output signal of the logic unit and makes the actuating of relay.Additionally provide a kind of method for relay.By the device and method of disclosure embodiment, relay can accurately and timely thread off, and avoid when leaking electricity, and electromagnetic relay causes the loss of personal safety and equipment property because tripping energy not enough can not cut off loop of electric leakage in time.
Description
Technical field
Each embodiment of the disclosure relates generally to a kind of device and method for relay, and more particularly to one
Device and method of the kind for the electromagnetic relay in earth leakage protective device.
Background technique
When earth leakage protective device is usually used in leaking electricity in equipment or route due to failure, timely line disconnection electric current
Circuit avoids human electric shock.Earth leakage protective device can also be used for the overload or short-circuit protection of equipment, be common in electrical system set
It is standby.In using earth leakage protective device of the electromagnetic relay as buckle releaser, it is necessary to assure have sufficiently large energy to ensure when hair
When raw electric leakage, electromagnetic relay can accurately and timely thread off.In circuit design, electromagnetic relay tripping is by storage capacitor
It discharges when circuit of threading off is connected the Inside coil of electromagnetic relay, breaks the dynamic balance inside electromagnetic relay, armature is released
It puts so that thimble is quickly got, drives mechanical component and thread off to cut off the power.
For electromagnetic relay, the tripping energy for successfully threading off required is divided into size, in general, electromagnetism relay
The tripping energy of device is bigger, lower to its cost and manufacturing technique requirent etc., and the tripping energy of electromagnetic relay is smaller, right
Its cost and manufacturing technique requirent etc. are higher.Meanwhile the tripping principle mandates of electromagnetic relay must be in sufficiently large energy
It successfully acts next time, otherwise, even if the tripping constantly on DC current in circuit, electromagnetic relay can not also thread off again.
In the prior art, the electromagnetic relay used is all by specific capacitor, voltage-stabiliser tube and specific electromagnetism
Relay type selecting guarantees that electromagnetic relay can accurately and timely act.But have significant limitation in this way, it often results in
Electromagnetic relay cannot select relatively large tripping energy, lead to the increased costs of relay in this way.Also, it is all due to meet
Multi-product standard, it is possible to occur the situation of electromagnetic relay akinesia in extreme circumstances, such as in equipment initial power-up
And at the same time, to meet product requirements of the national standard of leaking electricity, requiring relay trip action at this time, still when there is electric leakage signal
It may not yet be full of energy due to capacitor, and cause electromagnetic relay that can not act.
Therefore, it is intended that electromagnetic relay can accurately and timely thread off, while allowing again using the higher electromagnetism of cost performance
Relay is as buckle releaser.It avoids when leaking electricity, electromagnetic relay is because tripping energy not enough can not cut off leakage in time
Electrical circuit causes the loss of personal safety and equipment property.
Summary of the invention
In view of this, providing a kind of device and method for electromagnetic relay, it can ensure that electromagnetic relay is accurate
It acts in time.
Disclosure embodiment provides a kind of device for relay, including logic unit, the logic unit tool
There are a first input end and the second input terminal, fault detection unit, what the fault detection unit was configured to respond to detect
Fault-signal inputs the first signal to the first input end, and energy unit of threading off, the tripping energy unit is connected to described
Relay, and be configured as when the voltage of the tripping energy unit is more than predetermined threshold, it is defeated to second input terminal
Enter second signal and switch unit, the switch unit is configured to respond to the output signal of the logic unit and makes
Obtain the actuating of relay.
In accordance with one embodiment of the present disclosure, wherein the logic unit is logical AND unit.
In accordance with one embodiment of the present disclosure, wherein the fault-signal is formed in response to leakage current.
In accordance with one embodiment of the present disclosure, wherein first signal is high level.
In accordance with one embodiment of the present disclosure, wherein the tripping energy unit includes capacitor and voltage detector.
In accordance with one embodiment of the present disclosure, wherein the voltage detector is configured as detecting the electricity of the capacitor
Pressure, and when the voltage detected is more than the predetermined threshold, the second signal is inputted to second input terminal.
In accordance with one embodiment of the present disclosure, wherein the second signal is high level.
In accordance with one embodiment of the present disclosure, wherein the switch unit includes being connected between the relay and ground
Switching component.
In accordance with one embodiment of the present disclosure, wherein the switching component is configured to respond to the logic unit
The output signal and connect so that the actuating of relay.
Embodiment of the present disclosure provides a kind of earth leakage protective device, including being used for according to disclosure embodiment
The device of relay.
Embodiment of the present disclosure provides a kind of method for relay, including believing in response to the failure detected
Number, the first signal, the voltage of detection tripping energy unit, when the tripping energy list are inputted to the first input end of logic unit
When the voltage of member is more than predetermined threshold, second signal is inputted to the second input terminal of the logic unit, to first signal
Logical operation is carried out with the second signal, and in response to the logical operation as a result, making the actuating of relay.
In accordance with one embodiment of the present disclosure, wherein the logical operation is logic and operation.
In accordance with one embodiment of the present disclosure, wherein fault-signal is leakage current signal.
In accordance with one embodiment of the present disclosure, wherein first signal is high level.
In accordance with one embodiment of the present disclosure, wherein the tripping energy unit includes capacitor and voltage detector.
In accordance with one embodiment of the present disclosure, wherein when the voltage of the tripping energy unit is more than predetermined threshold,
Second signal is inputted to the second input terminal of the logic unit further include: detects the capacitor using the voltage detector
Voltage, and when the voltage detected be more than the predetermined threshold when, to second input terminal input described second
Signal.
In accordance with one embodiment of the present disclosure, wherein the second signal is high level.
In accordance with one embodiment of the present disclosure, wherein the switch unit includes being connected between the relay and ground
Switching component.
In accordance with one embodiment of the present disclosure, wherein in response to the logical operation as a result, making the relay
Movement further include: in response to the logical operation as a result, the switching component is connected, so that the actuating of relay.
By the device and method of disclosure embodiment, electromagnetic relay can accurately and timely thread off, and allow simultaneously
Use the higher electromagnetic relay of cost performance as buckle releaser.It avoids when leaking electricity, electromagnetic relay is because of tripping energy
Loop of electric leakage not enough can not be cut off in time, cause the loss of personal safety and equipment property.
Detailed description of the invention
It refers to the following detailed description in conjunction with the accompanying drawings, the feature, advantage and other aspects of each embodiment of the disclosure will become
Must be more obvious, show several embodiments of the disclosure by way of example rather than limitation herein.Wherein:
Fig. 1 schematically illustrates the block diagram of the device for relay according to disclosure embodiment；
Fig. 2 schematically illustrates the illustrative circuitry of the device for relay according to one embodiment of the disclosure
Figure；
Fig. 3 schematically illustrates the illustrative circuitry of the device for relay according to one embodiment of the disclosure
Figure；And
Fig. 4 schematically illustrates the flow chart of the method for relay according to disclosure embodiment.
Specific embodiment
Below with reference to each illustrative embodiments of the attached drawing detailed description disclosure.Block diagram and process diagram in attached drawing
The architectural framework in the cards of the device and method of the various embodiments according to the disclosure is gone out.It should be appreciated that providing this
A little illustrative embodiments are used for the purpose of making those skilled in the art can better understand that realizing the disclosure in turn, and be not
It limits the scope of the present disclosure in any way.
It will be understood by those skilled in the art that the device and method for relay of disclosure embodiment, Ke Yiyong
It, can also be with other kinds of relay in electromagnetic relay.The device and method of disclosure embodiment can be not only used for leaking
Non-electricity protector can be used in the other kinds of equipment using relay, it is ensured that relay is threaded off accurately and timely.
Referring to the schematic block diagram of Fig. 1, the device for relay according to disclosure embodiment is described.
As shown in Figure 1, a kind of device 100 for relay according to disclosure embodiment include logic unit 10,
Fault detection unit 20, tripping energy unit 30 and switch unit 40.Wherein, logic unit 10 is configured with first
Input terminal 11, the second input terminal 12 and output end 14.Fault detection unit 20 is connected to first input end 11, and inputs to it
First signal, tripping energy unit 30 connects the second input terminal 12, and inputs second signal to it.The output end of logic unit 10
It is connected to switch unit 40.Switch unit 40 is connected between relay 60 and ground connection.Relay 60 is connected to tripping energy list
Between member 30 and switch unit 40.
Hereinafter, will illustrate to be used for according to disclosure embodiment by taking failure situation in circuit as an example, in conjunction with Fig. 2
How the device of relay operates.
Fig. 2 shows the schematic circuits according to the device for relay of disclosure embodiment.Such as Fig. 2 institute
Show, in one embodiment, fault detection unit 20 is detected using the Current Transmit being connected in protected route
Fault-signal in route.Specifically, when occurring leakage current in circuit, current transformer senses leakage current if, and transmit
To processor chips ASIC, when processor chips ASIC receives leakage current ifWhen, to 21 output current signal of current amplifier
And keep the current signal, current amplifier 21 amplifies the current signal, to obtain the high level with suitable voltage
The first signal, with to first input end 11 input.
Alternatively, it will be understood by those skilled in the art that in addition to leakage current signal, the fault-signal is also possible to it
The fault-signal of his type, such as overvoltage signal or overcurrent signal.
In one embodiment, tripping energy unit 30 is connected to relay 60, and is configured as when the tripping energy
When measuring the voltage of unit more than predetermined threshold, second signal is inputted to the second input terminal 12.Specifically, which is high electricity
It is flat.As shown in Fig. 2, tripping energy unit 30 includes zener diode D1, diode D2, capacitor C1 and voltage detector 32.
When capacitor C1 completes to charge, and stores the energy that the success of relay 60 can be made to thread off, voltage detector 32 detects electricity
The voltage of container C1 meets or exceeds predetermined threshold, then to the second signal of 12 input high level of the second input terminal.That is,
When second signal is high level, it is meant that, capacitor C1 stores the energy for ensuring that relay 60 is threaded off.
Logic unit 10 is, for example, logical AND gate, for carrying out logical AND gate to first signal and the second signal
Operation.That is, the output signal of logic unit 10 is just high electricity only when the first signal and the second signal are high level
It is flat.In one embodiment, switch unit 40 is switching component, for example, transistor T3.The gate terminal of transistor T3 connects
It is connected to the output end 14 of logic unit 10, source terminal is connected to relay 60, drain terminal ground connection.When logic unit 10
Output end 14 be high level when, transistor T3 is switched on, at this time transistor T3 be connected so that tripping energy unit 30 with
Relay 60 forms the circuit of conducting, so that the capacitor C1 in tripping energy unit 30 discharges to relay 60.Due to electricity
The voltage of container C1 is more than predetermined threshold, and illustrated capacitor C1 stores enough energy and relay 60 is successfully taken off
Button, in this way it is ensured that relay 60 can accurately and timely thread off.
In some extreme environments, for example, in the initial stage of equipment power-on, capacitor is still in charging process
In, wherein the energy stored is not possible to that relay is made successfully to thread off, that is, when threshold voltage has not yet been reached in the voltage of capacitor, if
Occurs leakage current in circuit at this time, the capacitor for not yet completing charging will be unable to that relay is made successfully to thread off, in the prior art
This is to expect to solve the problems, such as.In the case where using the device of disclosure embodiment, leakage current signal at this moment will make
Obtaining the first signal is high level, and is kept by fault detection unit 20, until voltage detector 32 detects capacitor C1
Threshold voltage is had reached, at this moment just connects transistor T3, so that it is guaranteed that relay 60 can accurately and timely thread off.
Alternatively or optionally, Fig. 3 is schematically illustrated according to one embodiment of the disclosure for relay
The schematic circuit of the device of device.As shown in figure 3, in one embodiment, fault detection unit 20 is utilized to be connected on and be protected
Current Transmit in the route of shield carrys out the fault-signal in measure loop.Specifically, when occurring leakage current in circuit, electricity
Current transformer senses leakage current if, when processor chips ASIC receives leakage current ifWhen, there is electric current on resistor R5,
Transistor T1 is switched on, so that transistor T2 is turned off, since the effect of power source voltage Vcc will be at the source terminal of transistor T2
Level draw high, to form the first signal of high level, and be input to first input end 11.When fault detection unit 20 is to
When the first signal of one input terminal, 11 input high level, it is meant that there is leakage current in protected route, need to make in time after
Electric appliance 60 acts.
In another embodiment, tripping energy unit 30 may include capacitor C1, voltage detector 32, two pole of pressure stabilizing
Pipe D1, D3, general-purpose diode D2, resistor R1 and R2.In the initial stage powered to equipment, filled by Vcc to capacitor C1
Electricity, zener diode D1 are, for example, Zener diode, are used for protective condenser C1, voltage instability is prevented to be set to Capacitor Strap to damage
It is bad.Due to the voltage drop very little on general-purpose diode D2, ignore, the electricity when capacitor C1 charging complete, on capacitor
Press VC1It can be considered as equal to Vcc.Resistor R1 and R2 form bleeder circuit, by selecting the resistance value of resistor R1 and R2, example
Resistance value such as R1 and R2 is equal, so that V2 is equal to the half of Vcc.In this way, voltage V2 represents the voltage V of capacitorC1It is big
It is small.Voltage detector 32 can be, for example, voltage comparator, be configured as when voltage V2 is more than predetermined threshold, to logic list
Second input terminal of member 10 inputs second signal.The predetermined threshold, which corresponds to, enables relay 60 successfully to thread off required electricity
The energy of container.The bleeder circuit formed using resistor R1 and R2, is the overtension in order to avoid second signal, so as not to it is right
Logic unit 10 damages.It will be understood by those skilled in the art that voltage sensing means commonly used in the art also can be used,
Carry out the voltage V of capacitor sensorC1Size, and detecting VC1The second input when more than predetermined threshold, to logic unit 10
Hold the second signal of 12 input high levels.
In Fig. 2 and embodiment shown in Fig. 3, switch unit 40 is transistor T3, and those skilled in the art can also manage
Solution, switch unit 40 can be other suitable switching components, to realize when the output result of logic unit 10 is high level
When, by the function of circuit conducting.
Fig. 4 schematically illustrates the flow chart of the method for relay according to disclosure embodiment.According to one
A embodiment, in step 410, in response to the fault-signal detected, such as leakage current signal, first to logic unit is defeated
Enter the first signal of end input.At step 420, the voltage of detection tripping energy unit, such as providing tripping for relay
The voltage of the capacitor of energy.In step 430, when the voltage of the tripping energy unit is more than predetermined threshold, it is meant that
Capacitor C1 charging complete in tripping energy unit at this time, wherein storing the energy for enabling to relay successfully to thread off
Amount.At this point, inputting second signal to the second input terminal of the logic unit.In step 440, to first signal and institute
It states second signal and carries out logical operation.It specifically, is logical AND gate operation, that is, when the first signal and the second signal are high electricity
Usually, the result of logical operation is output high level.In step 450, in response to the logical operation as a result, making described
The actuating of relay.When the result of the logical operation is high level, so that relay is threaded off.
When the equipment of such as earth leakage protective device starts power supply, start to fill the capacitor C1 in tripping energy unit
Electricity, the voltage V of capacitor C1 as shown in Figure 3C1Start rising of starting from scratch, is input to the second letter of the second input terminal 12 at this time
Number be low level.When capacitor C1 charging complete, voltage VC1Equal to Vcc (ignore diode D2 conducting when voltage drop),
At this moment the voltage V2 that voltage detector 32 detects is more than predetermined threshold, and voltage detector 32 exports the second signal of high level.
In other words, when protected circuit works normally, without fault-signal, the first signal is low level.Work as appearance
Such as electric leakage failure situations when, fault detection unit 20 to logic unit 10 export high level the first signal.When tripping energy
When measuring the capacitor C1 completion charging in unit 30, the first signal and the second signal are high level, the logic of logic unit 10
Operation result is high level, and in response to the output signal of the high level, switch unit 40 is connected, so that relay 60 acts, at
Function tripping.
Below for the various situations of the input and output signal of logic element 10, to application according to disclosure embodiment
The circuits of device and method explained one by one.
When the first signal is low level, second signal is low level, and the equipment for representing such as earth leakage protective device is not powered,
And the fault-signal of such as leakage current is not detected in protected route yet, the at this moment output of logic unit 10 is low electricity
Flat, relay 60 does not act.
When the first signal be low level, second signal is high level, represent such as earth leakage protective device equipment in for after
Electric appliance tripping capacitor completed to charge, but do not detected in protected route any fault-signal (such as
Leakage current signal), the at this moment output of logic unit 10 is low level, and relay 60 does not act.
When the first signal is high level, second signal is low level, and representing fault detection unit 20 detects protected
There are fault-signal (such as leakage current signals) in circuit, but for relay tripping in the equipment of such as earth leakage protective device
Capacitor is not yet completed to charge, and the at this moment output of logic unit 10 is low level, and relay 60 does not act.But high level
The first signal kept by fault detection unit 20, wait capacitor complete charging.
When the first signal is high level, second signal is high level, and representing fault detection unit 20 detects protected
There are fault-signal (such as leakage current signals) in route, and for threading off for relay in the equipment of such as earth leakage protective device
The capacitor for providing energy has been completed to charge, and the at this moment output of logic unit 10 is high level, and relay 60 is successfully threaded off.
By the device and method of disclosure embodiment, electromagnetic relay can accurately and timely thread off, even if leaking
Occur the egregious cases of such as leakage current failure when the non-electricity protector equipment power supply initial stage, fault message can also be kept,
Until capacitor completes charging, enough energy are stored to ensure that relay is accurately successfully threaded off.It avoids when leaking electricity,
Electromagnetic relay may be because that tripping energy not enough can not cut off loop of electric leakage in time, cause personal safety and equipment property
Loss.
The disclosure is described referring to some embodiments.However, as one of ordinary skill in the art are easy to know, on
The other embodiments other than the embodiment having disclosed are stated equally to fall within the scope of this disclosure, such as by appended claims
Defined by.
Claims (19)
1. one kind is used for the device (100) of relay (60), including
Logic unit (10), the logic unit have first input end and the second input terminal,
Fault detection unit (20), the fault detection unit are configured to respond to the fault-signal detected, to described
One input terminal inputs the first signal,
It threads off energy unit (30), the tripping energy unit is connected to the relay, and is configured as when the tripping
When the voltage of energy unit is more than predetermined threshold, second signal is inputted to second input terminal, and
Switch unit (40), the switch unit be configured to respond to the output signal of the logic unit and make it is described after
Electric appliance movement.
2. the apparatus according to claim 1, wherein the logic unit is logical AND unit.
3. device according to claim 1 or 2, wherein the fault-signal is formed in response to leakage current.
4. device according to claim 1 or 2, wherein first signal is high level.
5. device according to claim 1 or 2, wherein the tripping energy unit includes capacitor (C1) and voltage detecting
Device (32).
6. device according to claim 5, wherein the voltage detector is configured as detecting the voltage of the capacitor,
And when the voltage detected is more than the predetermined threshold, the second signal is inputted to second input terminal.
7. according to claim 1, device described in 2 or 6, wherein the second signal is high level.
8. device according to claim 1 or 2, wherein the switch unit includes being connected between the relay and ground
Switching component.
9. device according to claim 8, wherein the switching component is configured to respond to the logic unit
The output signal and connect so that the actuating of relay.
10. a kind of earth leakage protective device, including the device according to claim 1 to 9 for relay.
11. a kind of method for relay, including
In response to the fault-signal detected, the first signal is inputted to the first input end of logic unit,
The voltage of detection tripping energy unit,
When the voltage of the tripping energy unit is more than predetermined threshold, to the second input terminal of logic unit input second
Signal,
Logical operation is carried out to first signal and the second signal, and
In response to the logical operation as a result, making the actuating of relay.
12. according to the method for claim 11, wherein the logical operation is logic and operation.
13. method according to claim 11 or 12, wherein fault-signal is leakage current signal.
14. method according to claim 11 or 12, wherein first signal is high level.
15. method according to claim 11 or 12, wherein the tripping energy unit includes capacitor and voltage detecting
Device.
16. according to the method for claim 15, wherein when the voltage of the tripping energy unit is more than predetermined threshold, to
Second input terminal of the logic unit inputs second signal further include:
The voltage of the capacitor is detected using the voltage detector, and when the voltage detected is more than described predetermined
When threshold value, the second signal is inputted to second input terminal.
17. method described in 1,12 or 16 according to claim 1, wherein the second signal is high level.
18. method according to claim 11 or 12, wherein the switch unit includes being connected to the relay and ground
Between switching component.
19. according to the method for claim 18, wherein in response to the logical operation as a result, making the relay dynamic
Make further include:
In response to the logical operation as a result, the switching component is connected, so that the actuating of relay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510272219.1A CN106300251B (en) | 2015-05-25 | 2015-05-25 | device and method for relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510272219.1A CN106300251B (en) | 2015-05-25 | 2015-05-25 | device and method for relay |
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| Publication Number | Publication Date |
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| CN106300251A CN106300251A (en) | 2017-01-04 |
| CN106300251B true CN106300251B (en) | 2018-12-04 |
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| CN201510272219.1A Active CN106300251B (en) | 2015-05-25 | 2015-05-25 | device and method for relay |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556777Y (en) * | 2002-07-05 | 2003-06-18 | 北京通力环电气股份有限公司 | DC controller for oscillating AC contactor |
| CN204928086U (en) * | 2015-05-25 | 2015-12-30 | 施耐德电气工业公司 | A device and earth -leakage protector for relay |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6724591B2 (en) * | 2001-11-15 | 2004-04-20 | Eaton Corporation | Circuit interrupter employing a mechanism to open a power circuit in response to a resistor body burning open |
| JP4572677B2 (en) * | 2004-12-21 | 2010-11-04 | サンケン電気株式会社 | Relay drive circuit |
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2015
- 2015-05-25 CN CN201510272219.1A patent/CN106300251B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556777Y (en) * | 2002-07-05 | 2003-06-18 | 北京通力环电气股份有限公司 | DC controller for oscillating AC contactor |
| CN204928086U (en) * | 2015-05-25 | 2015-12-30 | 施耐德电气工业公司 | A device and earth -leakage protector for relay |
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| CN106300251A (en) | 2017-01-04 |
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