CN105977074B - Arc extinguishing method based on relay - Google Patents
Arc extinguishing method based on relay Download PDFInfo
- Publication number
- CN105977074B CN105977074B CN201610494342.2A CN201610494342A CN105977074B CN 105977074 B CN105977074 B CN 105977074B CN 201610494342 A CN201610494342 A CN 201610494342A CN 105977074 B CN105977074 B CN 105977074B
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- CN
- China
- Prior art keywords
- relay
- delay time
- switch
- operating
- alternating current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H2009/307—Means for extinguishing or preventing arc between current-carrying parts with slow break, e.g. for AC current waiting for a zero crossing
Abstract
The present invention provides the arc extinguishing methods based on relay, belong to power domain.In the alternating current period including obtaining power circuit, the Active Delay time is determined in conjunction with the inherent delay time of relay, instruction of operating a switch is sent to relay after the Active Delay time, so that relay completes movement of operating a switch after the inherent delay time.The time for instruction of operating a switch is sent to relay by the adjustment of active, so that relay, which can execute movement of operating a switch in zero-acrross ing moment, realizes operating a switch for not arcing, contact impedance caused by making relay ablated because of arcing to reduction increases, and improves the safety of circuit locating for relay and relay.
Description
Technical field
The invention belongs to power domains, in particular to based on the arc extinguishing method of relay.
Background technique
The device for switching such as all kinds of switches, socket, breaker, A.C. contactor, relay are when closed or opened often
Phenomenon of arc discharge is generated, not only the contact of badly damaged device for switching, can also cause various accident potential to power circuit.
Maximum current is all in 60A in current civilian electrical energy meter electricity traffic specification, in maximum current in cutting customer power supply
In the process, relay can generate serious phenomenon of arc discharge during disconnection, during causing relay to pull open every time all
Meeting ablation relay contact, so that the contact impedance between contact can incrementally increase, to influence locating for relay and relay
The safety of circuit.
Summary of the invention
In order to solve shortcoming and defect existing in the prior art, the present invention provides for improving relay and relay
The arc extinguishing method based on relay of the safety of circuit locating for device.
In order to reach above-mentioned technical purpose, the present invention provides the arc extinguishing method based on relay, relay is mounted on
In power circuit, which comprises
When receive operate a switch instruct when, obtain the alternating current period of power circuit, in conjunction with relay inherent delay when
Between determine the Active Delay time；
The timing since at the time of detecting initial zero cross signal sends finger of operating a switch to relay after the Active Delay time
It enables, so that relay completes movement of operating a switch after the inherent delay time.
Optionally, the sampling A/D chip being electrically connected with the data register is additionally provided in the power circuit, it is described
Sampling A/D chip obtains the zero cross signal in the power circuit.
Optionally, the determining Active Delay time, comprising:
According to the alternating current period, the alternating current half period is determined；
The difference of alternating current half period and inherent delay time are obtained, the difference is the Active Delay time.
Optionally, further includes:
When sampling A/D chip detects initial zero cross signal, initial zero-acrross ing moment corresponding with initial zero cross signal is sent
To data register, the initial zero-acrross ing moment is obtained from data register by the first delay time
Optionally, it is determined according to the first delay time in conjunction with the inherent delay time and alternating current period of relay
The alternative delay time；
When getting zero-acrross ing moment from data register again, secondary drawing is sent to relay after the alternative delay time
Lock instruction, so that relay completes movement of operating a switch after the inherent delay time.
Optionally, obtain the first delay time and inherent delay time and value, and then obtain alternating current period and institute
The difference stated and be worth, the difference are the alternative delay time.
Optionally, the inherent delay time of the relay is 4-5ms.
Optionally, first delay time is 2-3ms.
Technical solution provided by the invention has the benefit that
The time for sending instruction of operating a switch to relay by the adjustment of active, so that relay can be in zero-acrross ing moment
It executes movement of operating a switch and realizes operating a switch for not arcing, so that contact impedance caused by reduction makes relay ablated because of arcing increases
Greatly, the safety of circuit locating for relay and relay is improved.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram of the arc extinguishing method provided by the invention based on relay；
Fig. 2 is the time shaft schematic diagram provided by the invention based on the Active Delay time；
Fig. 3 is the time shaft schematic diagram provided by the invention based on the alternative delay time.
Specific embodiment
To keep structure and advantage of the invention clearer, structure of the invention is made further below in conjunction with attached drawing
Description.
Embodiment one
The present invention provides the arc extinguishing method based on relay, relay is mounted in power circuit, the method packet
It includes:
When receive operate a switch instruct when, the alternating current period of power circuit is obtained, when according to the inherent delay of relay
Between, in conjunction with the alternating current period, determine the Active Delay time；
The timing since at the time of detecting zero cross signal sends instruction of operating a switch to relay after the Active Delay time,
So that relay completes movement of operating a switch after the inherent delay time.
In an implementation, as shown in Figure 1, occurring the phenomenon that arcing in power circuit to reduce, present applicant proposes bases
In the arc extinguishing method of relay, comprising:
11, when receive operate a switch instruct when, send request of data to the data register that is arranged in power circuit, obtain
The alternating current period of power circuit determines the Active Delay time in conjunction with the inherent delay time of relay.
Instruction of operating a switch in step 11 is issued by electric dispatching department, and effect is that controlling relay is receiving drawing
Electric brake is disconnected after lock instruction.If relay disconnects the time of electric brake at the time of just at electric current in power circuit be zero,
It is not in phenomenon of arc discharge；If the time that relay disconnects electric brake is in the time of electric current non-zero in power circuit, will go out
Existing phenomenon of arc discharge.But it is constrained to the material property and working principle of relay, relay operates a switch instruction to executing drawing from reception
There can be certain delay between lock movement, which is known as the inherent delay time of relay.
Therefore the thought of the application is according to the actual situation, dynamically adjust to relay send instruction of operating a switch when
Between, so that relay, which can be caught up with, executes movement of operating a switch in zero-acrross ing moment, to effectively avoid the appearance of phenomenon of arc discharge.
In order to realize said effect, need according to the acquisition Active Delay time, and then execute the content of step 12.In order to obtain
The step of taking the Active Delay time, needing the alternating current period according to circuit loop, determine the Active Delay time is hereinafter
It is described.
12, the timing since at the time of detecting initial zero cross signal sends to relay after the Active Delay time and draws
Lock instruction, so that relay completes movement of operating a switch after the inherent delay time.
In order to ensure relay can execute movement of operating a switch in zero-acrross ing moment, after detecting zero cross signal, using master
After dynamic delay time, instruction of operating a switch is sent to relay.
Optionally, the sampling A/D chip being electrically connected with the data register is additionally provided in the power circuit, it is described
Sampling A/D chip obtains the zero cross signal in the power circuit.
In an implementation, sampling A/D chip is equipped in power circuit, which is used to obtain the electric current in power circuit
Alternating cycles, and then will be at alternating current periodic transfer to the data register being electrically connected.Meanwhile sampling A/D chip also passes through
The variation tendency of monitoring current, at the time of generation to obtain zero cross signal.
Optionally, the determining Active Delay time, comprising:
According to the alternating current period, the alternating current half period is determined；
The difference of alternating current half period and inherent delay time are obtained, the difference is the Active Delay time.
In an implementation, it in order to obtain the Active Delay time, needs to obtain the alternating current half period according to the alternating current period,
And then the Active Delay time is determined according to the inherent delay time of alternating current half period and relay.Such as:
The frequency of current common alternating current is 50Hz, can learn that corresponding alternating current half period T/2 is 10ms.
Both according to the pattern detection of existing relay, determine that the inherent delay time T1 of relay is 4-5ms, therefore can learn
Difference, that is, Active Delay time T2 is 5-6ms, i.e., from a certain zero-acrross ing moment, sends letter of operating a switch to relay after delay 5-6ms
Number, operating a switch for not arcing can be realized in next zero-acrross ing moment, thus caused by reduction makes relay ablated because of arcing
Contact impedance increases, and improves the safety of circuit locating for relay and relay.Alternating current half period T/2 and solid at this time
There is the time relationship of delay time T1 as shown in Figure 2.
Optionally, further includes:
When sampling A/D chip detects initial zero cross signal, initial zero-acrross ing moment corresponding with initial zero cross signal is sent
To data register, the initial zero-acrross ing moment is obtained from data register by the first delay time
In an implementation, in addition to directly being obtained according to the inherent delay time T1 of alternating current half period T/2 and relay
Except Active Delay time T2, it can be combined with initial zero-acrross ing moment t0 and obtain alternative delay time T3, when passing through alternative delay
Between T3 Active Delay time T2 is modified, so as to auxiliary Active Delay time T2 more accurately control to relay
Transmission is operated a switch at the time of instruct.
Optionally, it is determined according to the first delay time in conjunction with the inherent delay time and alternating current period of relay
The alternative delay time；
When getting zero-acrross ing moment from data register again, secondary drawing is sent to relay after the alternative delay time
Lock instruction, so that relay completes movement of operating a switch after the inherent delay time.
In an implementation, obtain first the first delay time t1 and inherent delay time T1's and value, then obtain electric current friendship
Variable period T and described and value difference, the difference is alternative delay time T3.
When then from data register getting zero-acrross ing moment again, exist due to obtaining zero-acrross ing moment from data register
First delay time t1, so postponing alternative delay time T3 after getting zero-acrross ing moment and sending finger of operating a switch to relay again
It enables, relay can be enabled to realize operating a switch for not arcing in zero-acrross ing moment at this time, improve electricity locating for relay and relay
The safety on road.The time relationship of alternating current half period T/2 and inherent delay time T1 is as shown in Figure 3 at this time.
The frequency of current common alternating current is 50Hz, can learn that corresponding alternating current cycle T is 20ms.According to
The pattern detection of existing relay determines that the first delay time t1 is 2-3ms, and the inherent delay time T1 of relay is 4-5ms,
Therefore can learn difference i.e. alternative delay time T3 be 12-14ms, i.e., from a certain zero-acrross ing moment, delay 5-6ms backward after
Electric appliance sends signal of operating a switch.
It is because if practical active it is worth noting that, why proposing the scheme using the alternative delay time herein
Delay time does not enable relay when zero-acrross ing moment execution is operated a switch and acted, and can also pass through the method for implementation alternative delay time
The time for executing movement of operating a switch to relay again is adjusted.Even if relay is not being operated a switch in zero-acrross ing moment just,
It will can operate a switch as far as possible close to zero-acrross ing moment at the time of movement, because when operating a switch, if the electric current in power circuit
It is worth smaller, the phenomenon of arc discharge generated when operating a switch is also weaker, and it is also weaker to the ablation effect of relay contact, thus as far as possible
The safety for improving circuit locating for relay and relay.
The present invention provides the arc extinguishing methods based on relay, the alternating current period including obtaining power circuit, in conjunction with
The inherent delay time of relay determines the Active Delay time, sends instruction of operating a switch to relay after the Active Delay time, makes
It obtains relay and completes movement of operating a switch after the inherent delay time.By the adjustment of active to relay send instruction of operating a switch when
Between, so that relay, which can execute movement of operating a switch in zero-acrross ing moment, realizes operating a switch for not arcing, to reduce because of arcing
So that contact impedance caused by relay is ablated increases, the safety of circuit locating for relay and relay is improved.
Each serial number in above-described embodiment is for illustration only, the assembling for not representing each component or the elder generation in use process
Sequence afterwards.
The above description is only an embodiment of the present invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (5)
1. the arc extinguishing method based on relay, relay are mounted in power circuit, which is characterized in that the described method includes:
When receive operate a switch instruct when, obtain the alternating current period of power circuit, the inherent delay time in conjunction with relay is true
Determine the Active Delay time；
The timing since at the time of detecting initial zero cross signal sends instruction of operating a switch to relay after the Active Delay time,
So that relay completes movement of operating a switch after the inherent delay time；
The sampling A/D chip being electrically connected with data register is additionally provided in the power circuit, described in the sampling A/D chip obtains
Zero cross signal in power circuit；
When sampling A/D chip detects initial zero cross signal, number is sent by initial zero-acrross ing moment corresponding with initial zero cross signal
According to register, the initial zero-acrross ing moment is obtained from data register by the first delay time；
According to the first delay time, in conjunction with the inherent delay time and alternating current period of relay, when determining alternative delay
Between；
When getting zero-acrross ing moment from data register again, secondary finger of operating a switch is sent to relay after the alternative delay time
It enables, so that relay completes movement of operating a switch after the inherent delay time.
2. the arc extinguishing method according to claim 1 based on relay, which is characterized in that when the determining Active Delay
Between, comprising:
According to the alternating current period, the alternating current half period is determined；
The difference of alternating current half period and inherent delay time are obtained, the difference is the Active Delay time.
3. the arc extinguishing method according to claim 1 based on relay, it is characterised in that:
Obtain the first delay time and inherent delay time and value, and then obtain alternating current period and difference that is described and being worth
Value, the difference is the alternative delay time.
4. according to claim 1 to 2 described in any item arc extinguishing methods based on relay, which is characterized in that the relay
The inherent delay time be 4-5ms.
5. the arc extinguishing method according to claim 4 based on relay, which is characterized in that first delay time is 2-
3ms。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610494342.2A CN105977074B (en) | 2016-06-24 | 2016-06-24 | Arc extinguishing method based on relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610494342.2A CN105977074B (en) | 2016-06-24 | 2016-06-24 | Arc extinguishing method based on relay |
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| Publication Number | Publication Date |
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| CN105977074A CN105977074A (en) | 2016-09-28 |
| CN105977074B true CN105977074B (en) | 2019-03-26 |
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| CN201610494342.2A Active CN105977074B (en) | 2016-06-24 | 2016-06-24 | Arc extinguishing method based on relay |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019187001A (en) * | 2018-04-04 | 2019-10-24 | 三菱重工サーマルシステムズ株式会社 | Inrush current suppression circuit control device, voltage conversion system, inrush current suppression circuit control method and program |
| CN108962677A (en) * | 2018-07-11 | 2018-12-07 | 深圳拓邦股份有限公司 | A kind of means of relay controlling, system and relay |
| CN109585221B (en) * | 2018-12-19 | 2020-03-20 | 上海西阔电子科技有限公司 | Switch arc extinction control method |
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| CN101577192B (en) * | 2009-06-12 | 2011-05-04 | 百利通电子(上海)有限公司 | Method of zero passage switch of electromagnetic relay and circuit |
| US20130286528A1 (en) * | 2012-04-27 | 2013-10-31 | Hendon Semiconductors Pty Ltd | Electrical relay control arrangement for switching an electrical relay at zero crossing of an ac mains supply |
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| KR20070001415A (en) * | 2005-06-29 | 2007-01-04 | 삼성전자주식회사 | Relay driving device for power supply and control method thereof |
| CN101789334A (en) * | 2010-03-02 | 2010-07-28 | 罗静 | Relay zero crossing disconnection arc extinguishing method |
| CN203299594U (en) * | 2013-07-03 | 2013-11-20 | 珠海格力电器股份有限公司 | Sine-wave voltage based electric equipment control system |
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| CN105977074A (en) | 2016-09-28 |
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