CN201425921Y - Electromagnetic relay zero-crossing switch circuit - Google Patents

Electromagnetic relay zero-crossing switch circuit Download PDF

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Publication number
CN201425921Y
CN201425921Y CN2009200761967U CN200920076196U CN201425921Y CN 201425921 Y CN201425921 Y CN 201425921Y CN 2009200761967 U CN2009200761967 U CN 2009200761967U CN 200920076196 U CN200920076196 U CN 200920076196U CN 201425921 Y CN201425921 Y CN 201425921Y
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CN
China
Prior art keywords
circuit
electromagnetic relay
relay
resistor
switch
Prior art date
Application number
CN2009200761967U
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Chinese (zh)
Inventor
姚利
黄德松
卫勇
Original Assignee
百利通电子(上海)有限公司
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Publication date
Application filed by 百利通电子(上海)有限公司 filed Critical 百利通电子(上海)有限公司
Priority to CN2009200761967U priority Critical patent/CN201425921Y/en
Application granted granted Critical
Publication of CN201425921Y publication Critical patent/CN201425921Y/en

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Abstract

The utility model discloses an electromagnetic relay zero-crossing switch circuit, which is characterized by comprising an intelligent control chip, a trace detection circuit and an AC sampling circuit, wherein the intelligent control chip is respectively connected with the outputs of the trace detection circuit and the AC sampling circuit and controls the output of the electromagnetic relay; theAC sampling circuit is used for detecting the input AC voltage signal, the trace detection circuit is used for detecting the contact switch signal of the electromagnetic relay, and the intelligent control chip is used for collecting, storing and computing the input AC voltage signal and the contact switch signal of the electromagnetic relay and for controlling the switch of the electromagnetic relay. The utility model solves the problems of the sparking and EMI of the electromagnetic relay through the circuit self-learning, improves the service life of the relay, and reduces the production cost of the circuit design.

Description

A kind of zero passage switch of electromagnetic relay circuit

Technical field

The utility model belongs to the electronic circuit technology field, relates in particular to a kind of electromagnetic appliance zero passage switch circuit.

Background technology

In the control circuit of high-power household electrical appliances such as electric iron, electric heater, roaster, air-conditioning, refrigerator, adopt electromagnetic relay control mostly, sparking in the relay switch process then is the fatal killer of relay contact, significantly reduce the relay life-span, and brought the EMI interference problem simultaneously.

And the applicant had submitted the patent application of the relevant zero-cross triggering circuit that addresses this problem with regard to the sparking problem of relay, specifically can be referring to patent ZL 200620039011.1, the application improves on the basis of last patent, removed controllable silicon, reduced cost, not only same purpose can be reached, more relay can also be adapted to simultaneously.

The utility model content

The purpose of this utility model is to disclose a kind of raising electromagnetic relay useful life, solves the zero passage switch of electromagnetic relay circuit of EMI interference problem.

The technical solution of the utility model is, a kind of zero passage switch of electromagnetic relay circuit, comprise intelligent control chip, follow the tracks of testing circuit and alternating current sampling circuit, described intelligent control chip connects the output of described tracking testing circuit and described alternating current sampling circuit respectively, control the output of described electromagnetic relay, wherein:

Described alternating current sampling circuit is used for the detection to the input ac voltage signal;

Described tracking testing circuit is used for the detection to electromagnetic relay contact switch signal;

Described intelligent control chip is used for controlling to collection, storage and the calculating of described input ac voltage signal and described electromagnetic relay contact switch signal with for the switch of described electromagnetic relay.

Described alternating current sampling circuit is become with a string joint group of resistor by the parallel circuits of resistor three and capacitor two.

Described resistor three value 10K Ω, capacitor two values 0.01 μ F, resistor one value 1M Ω.

Described tracking testing circuit is composed in series by the parallel circuits and the resistor two of resistor four and capacitor three.

Described resistor four value 10K Ω, capacitor three values 0.01 μ F, resistor two value 1M Ω.

Do a simple declaration with regard to the principle of the technical scheme of stupid utility model below.

Electromagnetic relay is exactly the electromagnetic switch of a machinery, its basic principle is when powering up to coil, the magnetic field of its generation can be inhaled armature and be forwarded on the normally opened contact from a normally-closed contact, because be hard contact, so relay has the very little characteristics of conducting resistance, can be applied in the occasion of high-power control.

Also because the break-make of electromagnetic relay is mechanical action, so switch is from needing the regular hour in addition while moving to when powering up to relay, Here it is pull up time, the operate time of general power relay is about 5-30mS, and has a bigger individual difference, this time does not generally have any influence to electrical work, voltage over zero is opened and switching off load but so just cause can't going to aim at, the surge current that switch brings will cause interference to electrical network, this is the insurmountable always problem of relay, some is the average pickup time of calculating a relay substantially in the product of the control of the use relay of research and development, shift to an earlier date the regular hour at zero crossing then and remove to open relay, it is basic like this that can to make the part switch motion be near zero-crossing point, but the consideration individual difference is not still really dealt with problems.

Electromagnetic relay tends to occur the arcing phenomenon in the moment of switch on switch contact when the control high-voltage great-current in addition, the spark phenomenon of just generally seeing, electrical wear will appear in this moment, and this wearing and tearing will be considerably beyond mechanical wear, so cause the electrical endurance of relay to be far smaller than its mechanical endurance, general electrical endurance is all about 5-10 is ten thousand times, and generally can reach more than 1,000,000 times pure mechanical endurance, the a lot of people of industry generally can use arc-extinguish chamber in the research of being devoted to the electronics arc extinguishing for this reason, capacitance-resistance extinguishing arc or electronics arc arrester are eliminated electric arc.

At the problems referred to above, the technical solution of the utility model is carried the previous time and is powered up to electromagnetic relay coil in the zero crossing front, if this time just in time equals pull up time, then the contact of relay just can be just in time in the zero crossing adhesive.For dissimilar electromagnetic relays, perhaps with a kind of Different Individual of relay, even external conditions such as the different driving voltage of same individuality or temperature, the difference of bigger operate time is arranged all.Because can't give all the same leads of relay, the technical solution of the utility model is followed the tracks of the time of detecting real adhesive in contact or disconnection in each relay adhesive or disconnection, data are sent into IC inside, store, calculate, with adjust for lead, just in time allow lead equal operate time thereby reach, realized zero cross fired.Simultaneously, circuit of the present utility model does not need extra arc-control device yet.

The utility model has solved the problem and the EMI problem of electromagnetic relay sparking in a kind of mode of circuit self study, in the useful life of having improved relay, has reduced the circuit design manufacturing cost.

Description of drawings

Fig. 1 is a zero passage switch of electromagnetic relay circuit module theory diagram among the utility model one embodiment

Fig. 2 is zero passage switch of electromagnetic relay circuit theory diagrams among the utility model one embodiment

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.

The utility model has an acquiescence initial value of opening the relay lead first in the circuit storage inside, after receiving the unlatching relay signal first, open relay according to the acquiescence lead, then detect the real pickup time of contact of relay subsequently, if be just in time at zero crossing, then continue next time to control with this lead, and general relay all can have any to shift to an earlier date or hysteresis a burst of pickup time, then IC can with this in advance and the time that lags behind deposit IC in, be used for adjust for lead through weighted calculation, then subtract in advance, lagging behind then adds, and just opens relay with the revised time for the second time, it is same if just in time zero passage does not then deal with, if have in advance or the adjust for lead again that lags behind then, can finish tracking so several times, later relay all can be in the zero crossing adhesive.

The process of closing is identical with unlatching.

As shown in Figure 1, the zero passage switch of electromagnetic relay circuit module, comprise intelligent control chip, follow the tracks of testing circuit and alternating current sampling circuit, wherein, alternating current sampling circuit is used for the detection to the input ac voltage signal, the tracking testing circuit is used for the detection to electromagnetic relay contact switch signal, and intelligent control chip is used for controlling to collection, storage and the calculating of described input ac voltage signal and described electromagnetic relay contact switch signal with for the switch of described electromagnetic relay.Control circuit is mainly finished collection, storage, calculating, the output of relay signal and is handled, alternating current sampling circuit only needs a resistance to get final product, can increase a resistance and an electric capacity for safe and reliable, and the tracking sampling circuit can have same structure with alternating current sampling circuit, and relay can be all DC driven relays that use present market.

As shown in Figure 2, U1 is the PTI special integrated circuit among the figure, is the core of control circuit, and the work of other circuit is coordinated in control; R1, R3 and C2 are used for gathering the zero crossing information of AC power, R2, R4 and C3 are the relay contact Working state checking circuits, whether detect relay in zero crossing adhesive or disconnection, IC according to these information to carry out the adjustment of adhesive control; R5, Q1 and D1 then are the relay coil drive circuits, in order to control relay adhesive or disconnection.C1 is the power filtering capacitor of IC.Described alternating current sampling circuit is composed in series by parallel circuits and the resistor R 1 of resistor R 3 and capacitor C2, resistor R 3 value 10K Ω, capacitor C2 value 0.01 μ F, resistor R 1 value 1M Ω.The tracking testing circuit is composed in series resistor R 4 value 10K Ω, capacitor C3 value 0.01 μ F, resistor R 2 value 1M Ω by parallel circuits and the resistor R 2 of resistor R 4 and capacitor C3.

In a word, the technical solution of the utility model mainly is a kind of implementation method of self study type relay zero-crossing switch, circuit is made up of Based Intelligent Control IC, alternating current sampling circuit, tracking testing circuit, relay and load etc., wherein intelligence control circuit is the some or all of circuit of our company's special chip, it is the core of system, meeting provides a drive signal according to phase of ac signal and after the state of relay judge at present after receiving control command, goes to open or closed relay.Alternating current sampling circuit is responsible for sampling and is exchanged phase place; Follow the tracks of then the sample operating state of relay contact of testing circuit, confirming to have does not have real adhesive.The principle of adhesive operate time of relay is followed the tracks of in this programme utilization study automatically, according to the switching delay of relay itself, gives the method for corresponding lead, has realized zero passage switch of electromagnetic relay.Technical solutions of the utility model need not other annex device, adapt to various relays automatically, and the individual difference of relay no longer becomes problem.

Claims (5)

1, a kind of zero passage switch of electromagnetic relay circuit, it is characterized in that, comprise intelligent control chip, follow the tracks of testing circuit and alternating current sampling circuit, described intelligent control chip connects the output of described tracking testing circuit and described alternating current sampling circuit respectively, control the output of described electromagnetic relay, wherein:
Described alternating current sampling circuit is used for the detection to the input ac voltage signal;
Described tracking testing circuit is used for the detection to electromagnetic relay contact switch signal;
Described intelligent control chip is used for controlling to collection, storage and the calculating of described input ac voltage signal and described electromagnetic relay contact switch signal with for the switch of described electromagnetic relay.
2, the zero passage switch of electromagnetic relay circuit shown in claim 1 is characterized in that, described alternating current sampling circuit is become with a string joint group of resistor by the parallel circuits of resistor three and capacitor two.
3, the zero passage switch of electromagnetic relay circuit shown in claim 2 is characterized in that, described resistor three value 10K Ω, capacitor two values 0.01 μ F, resistor one value 1M Ω.
4, the zero passage switch of electromagnetic relay circuit shown in claim 1 is characterized in that, described tracking testing circuit is composed in series by the parallel circuits and the resistor two of resistor four and capacitor three.
5, the zero passage switch of electromagnetic relay circuit shown in claim 4 is characterized in that, described resistor four value 10K Ω, capacitor three values 0.01 μ F, resistor two value 1M Ω.
CN2009200761967U 2009-06-12 2009-06-12 Electromagnetic relay zero-crossing switch circuit CN201425921Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009200761967U CN201425921Y (en) 2009-06-12 2009-06-12 Electromagnetic relay zero-crossing switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009200761967U CN201425921Y (en) 2009-06-12 2009-06-12 Electromagnetic relay zero-crossing switch circuit

Publications (1)

Publication Number Publication Date
CN201425921Y true CN201425921Y (en) 2010-03-17

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Application Number Title Priority Date Filing Date
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102419562A (en) * 2011-12-14 2012-04-18 海信(山东)空调有限公司 Control method of relay with inductive load, and household appliance
CN102956398A (en) * 2011-08-26 2013-03-06 Ls产电株式会社 Electromagnetic contactor control method and electromagnetic contactor using the same
CN104576206A (en) * 2015-01-19 2015-04-29 国家电网公司 Spark control device of alternating current contactor
CN105098792A (en) * 2014-12-18 2015-11-25 华北电力大学 Intelligent capacitor capable of realizing on-line self-adaptive zero-crossing switching correction
CN105679606A (en) * 2016-01-28 2016-06-15 福州大学 Electromagnetic relay based wireless zero-crossing on-off switch and control method
US10240597B2 (en) 2012-02-03 2019-03-26 S.P.M. Flow Control, Inc. Pump assembly including fluid cylinder and tapered valve seats
USD856498S1 (en) 2013-01-31 2019-08-13 S.P.M. Flow Control, Inc. Valve seat

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102956398A (en) * 2011-08-26 2013-03-06 Ls产电株式会社 Electromagnetic contactor control method and electromagnetic contactor using the same
CN102419562A (en) * 2011-12-14 2012-04-18 海信(山东)空调有限公司 Control method of relay with inductive load, and household appliance
CN102419562B (en) * 2011-12-14 2013-08-21 海信(山东)空调有限公司 Control method of relay with inductive load, and household appliance
US10240597B2 (en) 2012-02-03 2019-03-26 S.P.M. Flow Control, Inc. Pump assembly including fluid cylinder and tapered valve seats
USD856498S1 (en) 2013-01-31 2019-08-13 S.P.M. Flow Control, Inc. Valve seat
CN105098792A (en) * 2014-12-18 2015-11-25 华北电力大学 Intelligent capacitor capable of realizing on-line self-adaptive zero-crossing switching correction
CN105098792B (en) * 2014-12-18 2018-01-16 华北电力大学 The intelligent capacitor of online adaptive operating passing zero correction
CN104576206A (en) * 2015-01-19 2015-04-29 国家电网公司 Spark control device of alternating current contactor
CN105679606A (en) * 2016-01-28 2016-06-15 福州大学 Electromagnetic relay based wireless zero-crossing on-off switch and control method
CN105679606B (en) * 2016-01-28 2018-12-25 福州大学 A kind of wireless zero passage on-off switch and control method based on electromagnetic relay

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CX01 Expiry of patent term

Granted publication date: 20100317

CX01 Expiry of patent term