CN105227164A - The control method of relay, control device and electromagnetic oven - Google Patents
The control method of relay, control device and electromagnetic oven Download PDFInfo
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- CN105227164A CN105227164A CN201410251258.9A CN201410251258A CN105227164A CN 105227164 A CN105227164 A CN 105227164A CN 201410251258 A CN201410251258 A CN 201410251258A CN 105227164 A CN105227164 A CN 105227164A
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Abstract
The invention discloses a kind of control method of relay, comprise the following steps: obtain the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21; What obtain relay according to the no-voltage cycle T of power supply grid and the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb; When the voltage zero-cross of power supply grid, postpone to export after ta and open control signal and open with control relay or export after postponing tb and turn off control signal and turn off with control relay, the magnitude of voltage wherein corresponding to t11+ta, t21+tb time point is all within the scope of voltage zero-cross.The control method of this relay can guarantee that different relay is opened when no-voltage, turned off, and not only can improve the useful life of relay, can also avoid the interference to power supply grid, improves the stability of power supply grid.The invention also discloses a kind of control device of relay and a kind of electromagnetic oven with the control device of this relay.
Description
Technical field
The present invention relates to relay technical field, particularly a kind of control method of relay, a kind of control device of relay and there is the electromagnetic oven of this control device.
Background technology
Mechanical relay, opening, in turn off process, there is certain mechanical delay, and there is larger difference in delay time.Therefore in the control procedure of relay, be difficult to ensure its open, turn off all be in no-voltage under carry out, and open at higher voltages, turn off relay, not only reduce the useful life of relay, and the opening of relay, turn off and can produce larger interference to place electrical network.
Therefore, need to improve to the control of opening, turning off of relay.
Summary of the invention
Object of the present invention is intended at least solve above-mentioned technological deficiency.
For this reason, first object of the present invention is the control method proposing a kind of relay, and the control method of this relay can guarantee that different relay is opened when no-voltage, turned off.
Second object of the present invention is the control device proposing a kind of relay.3rd object of the present invention is to propose a kind of electromagnetic oven.
For achieving the above object, the control method of a kind of relay that first aspect present invention embodiment proposes, comprises the following steps: obtain the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21; What obtain described relay according to the no-voltage cycle T of power supply grid and the Mechanical recanalization delay time t11 of described relay and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb; When the voltage zero-cross of described power supply grid, export after postponing described ta and open control signal and turn off control signal turn off to control described relay to control described relay and open or to export after postponing described tb, the magnitude of voltage wherein corresponding to t11+ta and t21+tb two time points is all within the scope of voltage zero-cross.
According to the control method of the relay of the embodiment of the present invention, first the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21 is obtained, what then obtain relay according to the no-voltage cycle T of power supply grid and the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb, finally when the voltage zero-cross of power supply grid, postpone to export after ta to open when opening control signal to control the next voltage zero-cross of described relay after ta or export after postponing tb and turn off control signal and turn off with during the next zero crossing of control relay after tb.That is to say the time delay ta time when first time voltage zero-cross, now export control signal, then just actual open-minded after relay meeting time delay t11, because the magnitude of voltage that ta+t11 time point is corresponding is within the scope of zero passage voltage, then relay actual is opened the moment and all carries out within the scope of zero passage voltage, in like manner, the shutoff moment also all carries out within the scope of voltage zero-cross, thus realize relay zero-crossing and open or turn off, so not only can improve the useful life of relay, improve the reliability of circuit, the interference to power supply grid can also be avoided, improve the stability of power supply grid.
According to one embodiment of present invention, obtain the Mechanical recanalization delay time t11 of relay and specifically comprise: export described open control signal to described relay time, control the first timer and start timing, and the situation of opening of described relay is detected; When detecting that described relay is opened completely, terminate when controlling described first timer, wherein, the timing time of described first timer is the Mechanical recanalization delay time t11 of described relay.
According to one embodiment of present invention, the mechanical turn off delay time time t21 obtaining relay specifically comprises: when exporting described shutoff and controlling signal to described relay, control the second timer and start timing, and detect the shutoff situation of described relay; When detecting that described relay turns off completely, terminate when controlling described second timer, wherein, the timing time of described second timer is the mechanical turn off delay time time t21 of described relay.
Wherein, described ta equals mT-t11, and described tb equals mT-t21, and m is positive integer.Such ta+t11 equals mT, tb+t11 and equals mT, thus makes relay open at zero crossing or turn off, and the loss of relay can be made minimum.
According to one embodiment of present invention, also comprise: the voltage of described power supply grid is detected, and when the voltage of described power supply grid is less than or equal to predeterminated voltage, judge the voltage zero-cross of described power supply grid, wherein, voltage zero-cross is commonly referred to as the minizone scope that voltage is in zero crossings.
For achieving the above object, the control device of a kind of relay that second aspect present invention embodiment proposes, comprising: voltage detecting circuit, and described voltage detecting circuit is used for detecting with formation voltage detection signal to the voltage of power supply grid, control relay circuit, described control relay circuit is used for control relay and opens or turn off, microprocessor, described microprocessor is connected with described control relay circuit with described voltage detecting circuit respectively, what described microprocessor obtained described relay according to the Mechanical recanalization delay time t11 of the no-voltage cycle T of described power supply grid and the described relay of acquisition and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb, and when judging the voltage zero-cross of described power supply grid according to described voltage detection signal, export after described microprocessor postpones described ta to open and control signal to described control relay circuit and control signal to described control relay circuit turn off to control described relay to control described relay and open or to export shutoff after postponing described tb, magnitude of voltage wherein corresponding to t11+ta and t21+tb two time points is all within the scope of voltage zero-cross.
According to the control device of the relay of the embodiment of the present invention, what microprocessor obtained relay according to the Mechanical recanalization delay time t11 of the no-voltage cycle T of power supply grid and the relay of acquisition and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb, and when judging the voltage zero-cross of power supply grid according to voltage detection signal, microprocessor postpones to export after ta to open and controls signal to control relay circuit and control signal to control relay circuit turn off with during the next voltage zero-cross of control relay after tb to open during the next voltage zero-cross of control relay after ta or to export after postponing tb to turn off.That is to say the time delay ta time when first time voltage zero-cross, now export control signal, then just actual open-minded after relay meeting time delay t11, because the magnitude of voltage that ta+t11 time point is corresponding is within the scope of zero passage voltage, then relay actual is opened the moment and all carries out within the scope of zero passage voltage, in like manner, the shutoff moment also all carries out within the scope of voltage zero-cross, thus realize relay zero-crossing and open or turn off, make the opening process of relay like this, turn off process all carries out within the scope of zero passage voltage, not only can improve the useful life of relay, improve the reliability of circuit, the interference to power supply grid can also be avoided, improve the stability of power supply grid.
According to one embodiment of present invention, also comprise relay test circuit, described relay test circuit is for detecting situation of opening and the shutoff situation of described relay, and described microprocessor comprises the first timer, described microprocessor export described open control signal to described control relay circuit time, control described first timer and start timing, and when described relay test electric circuit inspection is opened completely to described relay, terminate during the first timer described in described Microprocessor S3C44B0X, wherein, the timing time of described first timer is the Mechanical recanalization delay time t11 of described relay.
According to one embodiment of present invention, described microprocessor also comprises the second timer, described microprocessor is when exporting described shutoff and controlling signal to described control relay circuit, control described second timer and start timing, and when described relay test electric circuit inspection turns off completely to described relay, terminate during the second timer described in described Microprocessor S3C44B0X, wherein, the timing time of described second timer is the mechanical turn off delay time time t21 of described relay.
Wherein, described ta equals mT-t11, and described tb equals mT-t21, and m is positive integer.Such ta+t11 equals mT, tb+t11 and equals mT, thus makes relay open at zero crossing or turn off, and the loss of relay can be made minimum.
According to one embodiment of present invention, when described voltage detecting circuit detects that the voltage of described power supply grid is less than or equal to predeterminated voltage, described microprocessor judges the voltage zero-cross of described power supply grid according to described voltage detection signal.
In addition, embodiments of the invention also proposed a kind of electromagnetic oven, and it comprises the control device of above-mentioned relay.
The electromagnetic oven of the embodiment of the present invention, when opening by the control device control relay of relay or turn off, the opening process of relay, turn off process can be made all to carry out under no-voltage, not only can improve the useful life of relay, improve the reliability of circuit, the interference to power supply grid can also be avoided, improve the stability of power supply grid.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the flow chart of the control method of relay according to the embodiment of the present invention;
Fig. 2 A is the schematic diagram opening delay time ta or turn off delay time time tb obtaining relay according to an embodiment of the invention; And
Fig. 2 B is the block diagram of the control device of relay according to the embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Describe the control method of relay, the control device of relay that propose according to the embodiment of the present invention with reference to the accompanying drawings and there is the electromagnetic oven of control device of this relay.
Fig. 1 is the flow chart of the control method of relay according to the embodiment of the present invention.As shown in Figure 1, the control method of this relay comprises the following steps:
S1, obtains the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21.
According to one embodiment of present invention, obtain the Mechanical recanalization delay time t11 of relay and specifically comprise: output open control signal to relay time, control the first timer and start timing, and the situation of opening of relay is detected; When detecting that relay is opened completely, terminate when controlling the first timer, wherein, the timing time of the first timer is the Mechanical recanalization delay time t11 of relay.
Specifically, microprocessor is started working after the power-up, and when microprocessor output is opened and controlled signal to relay, now the first timer starts timing; After detecting that relay is opened completely, interrupt signal input microprocessor, microprocessor produces and interrupts, terminate during the first timer, from microprocessor send open control signal to the time that relay is opened completely that is the timing of the first timer institute for the actual machine of relay opens delay time t11, then t11 is stored in memory.
Wherein, if in circuit such as electromagnetic oven circuit in when there is multiple relay, the Mechanical recanalization delay time of each relay is then obtained respectively according to above-mentioned steps, and by Mechanical recanalization delay time t11, the t12 of multiple relay, t13 ..., t1n is stored in memory, n be greater than 1 integer.
Similarly, the mechanical turn off delay time time t21 obtaining relay specifically comprises: when exporting shutoff and controlling signal to relay, control the second timer and start timing, and detect the shutoff situation of relay; When detecting that relay turns off completely, terminate when controlling the second timer, wherein, the timing time of the second timer is the mechanical turn off delay time time t21 of relay.
Specifically, after the Mechanical recanalization delay time t11 obtaining relay, microprocessor exports shutoff and controls signal to relay, and now the second timer starts timing; Have no progeny when detecting that relay closes completely, interrupt signal input microprocessor, microprocessor produces and interrupts, terminate during the second timer, that is send shutoff control signal to the time that relay turns off completely from microprocessor is the actual machine turn off delay time time t21 of relay the timing of the second timer institute, is then stored in memory by t21.
Wherein, if in circuit such as electromagnetic oven circuit in when there is multiple relay, the mechanical turn off delay time time of each relay is then obtained respectively according to above-mentioned steps, and by mechanical turn off delay time time t21, the t22 of multiple relay, t23 ..., t2n is stored in memory, n be greater than 1 integer.
S2, what obtain relay according to the no-voltage cycle T of power supply grid and the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb.
S3, when the voltage zero-cross of power supply grid, postpone to export after ta and open control signal and open with control relay or export after postponing tb and turn off control signal and turn off with control relay, the magnitude of voltage wherein corresponding to t11+ta and t21+tb two time points is all within the scope of voltage zero-cross.
According to one embodiment of present invention, the control method of above-mentioned relay also comprises: detect the voltage of power supply grid, and when the voltage of power supply grid is less than or equal to predeterminated voltage, judges the voltage zero-cross of power supply grid.That is, detect by the voltage of voltage detecting circuit to power supply grid, and the voltage detection signal of generation is sent to microprocessor, when voltage detecting circuit detects that the voltage of power supply grid is less than or equal to predeterminated voltage U0, microprocessor judges the voltage zero-cross of power supply grid according to voltage detection signal now, as shown in Figure 2 A, all think that voltage is within the scope of zero passage between the U0 point of voltage on zero crossings both sides.
The no-voltage of power supply grid may be defined as T cycle time, according to one embodiment of present invention, meter relay open delay time ta=mT-t11, wherein, m is positive integer.As m=1, multiple relay open delay time respectively T-t11, T-t12, T-t13 ..., T-t1n.In like manner, the turn off delay time time tb=mT-t21 of relay, as m=1, multiple relay open delay time be respectively T-t21, T-t22, T-t23 ..., T-t2n.
Specifically as shown in Figure 2 A, when the voltage waveform of power supply grid is ac power waveform, and during m=1, ta=T-t11, thus can obtain relay open delay time ta=T-t11, when zero crossing being detected, exporting to open after time delay ta and control signal to relay, actual just open-minded after relay self meeting time delay t11, that is to say at T moment zero passage voltage point open-minded; In like manner can obtain the turn off delay time time tb=T-t21 of relay, when zero crossing being detected, export shutoff and controlling signal to relay after time delay tb1, then relay self can actual just shutoff after time delay t21, that is to say to turn off at T moment zero passage voltage point.What can ensure relay like this actually to open or actual shutoff is all carry out under no-voltage.Wherein, if the voltage waveform of power supply grid is direct current waveform, what can obtain relay equally opens delay time and turn off delay time time.
Therefore, the control method of the relay of the embodiment of the present invention can obtain the different Mechanical recanalization delay time of each relay in the circuit of electromagnetic oven, mechanical turn off delay time time, what then calculate each relay opens delay time, turn off delay time time, finally can guarantee that relay is opened under being in no-voltage, turned off, with the stability in the useful life and power supply grid of improving relay.
According to the control method of the relay of the embodiment of the present invention, first the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21 is obtained, what then obtain relay according to the no-voltage cycle T of power supply grid and the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb, finally when the voltage zero-cross of power supply grid, postpone to export after ta to open when opening control signal to control the next voltage zero-cross of described relay after ta or export after postponing tb and turn off control signal and turn off with during the next zero crossing of control relay after tb.That is to say the time delay ta time when first time voltage zero-cross, now export control signal, then just actual open-minded after relay meeting time delay t11, because the magnitude of voltage that ta+t11 time point is corresponding is within the scope of zero passage voltage, then relay actual is opened the moment and all carries out within the scope of zero passage voltage, in like manner, the shutoff moment also all carries out within the scope of voltage zero-cross, thus realize relay zero-crossing and open or turn off, so not only can improve the useful life of relay, improve the reliability of circuit, the interference to power supply grid can also be avoided, improve the stability of power supply grid.
Fig. 2 B is the block diagram of the control device of relay according to the embodiment of the present invention.As shown in Figure 2 B, the control device of this relay comprises voltage detecting circuit 10, control relay circuit 20 and microprocessor 30.
Voltage detecting circuit 10 is for detecting with formation voltage detection signal to the voltage of power supply grid, control relay circuit 20 is opened for control relay 100 or is turned off, microprocessor 30 is connected with control relay circuit 20 with voltage detecting circuit 10 respectively, what microprocessor 30 obtained relay 100 according to the Mechanical recanalization delay time t11 of the no-voltage cycle T of power supply grid and the relay 100 of acquisition and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb, and when judging the voltage zero-cross of described power supply grid according to described voltage detection signal, export after microprocessor 30 postpones described ta to open and control signal to control relay circuit 20 and open or export after postponing described tb shutoff with control relay 100 and control signal to control relay circuit 20 and turn off with control relay 100, magnitude of voltage wherein corresponding to t11+ta and t21+tb two time points is all within the scope of voltage zero-cross.
According to one embodiment of present invention, when voltage detecting circuit 10 detects that the voltage of described power supply grid is less than or equal to predeterminated voltage U0, microprocessor 30 judges the voltage zero-cross of described power supply grid according to described voltage detection signal.
According to one embodiment of present invention, as shown in Figure 2 B, the control device of above-mentioned relay also comprises relay test circuit 40, relay test circuit 40 is for detecting situation of opening and the shutoff situation of relay 100, and microprocessor 30 comprises the first timer 301, microprocessor 30 export described open control signal to control relay circuit 20 time, control the first timer 301 and start timing, and when relay test circuit 40 detects that relay 100 is opened completely, microprocessor 30 controls the first timer 301 timing to be terminated, wherein, the timing time of the first timer 301 is the Mechanical recanalization delay time t11 of relay 100.
And, microprocessor 30 also comprises the second timer 302, microprocessor 30 is when exporting described shutoff and controlling signal to control relay circuit 20, control the second timer 302 and start timing, and when relay test circuit 40 detects that relay 100 turns off completely, microprocessor 30 controls the second timer 302 timing to be terminated, and wherein, the timing time of the second timer 302 is the mechanical turn off delay time time t21 of relay 100.
As shown in Figure 2 B, the control device of above-mentioned relay also comprises memory 50, for Mechanical recanalization delay time t11 and the mechanical turn off delay time time t21 of storage relay, if in circuit such as electromagnetic oven circuit in when there is multiple relay, then obtain the Mechanical recanalization delay time of each relay respectively, and by Mechanical recanalization delay time t11, the t12 of multiple relay, t13 ..., t1n is stored in memory 50, n be greater than 1 integer.Similarly, obtain the mechanical turn off delay time time of each relay respectively, and by mechanical turn off delay time time t21, the t22 of multiple relay, t23 ..., t2n is stored in memory 50.
In an embodiment of the present invention, described ta equals T-t11, and described tb equals T-t21.Owing to storing t1n and t2n of each relay in memory 50, therefore the delay time that each relay is opened or turned off then only needs to detect once, open next time or turn off, ta and tb can be calculated by t1n and t2n of former storage, or can directly ta and tb of each relay be stored.
According to the control device of the relay of the embodiment of the present invention, what microprocessor obtained relay according to the Mechanical recanalization delay time t11 of the no-voltage cycle T of power supply grid and the relay of acquisition and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb, and when judging the voltage zero-cross of power supply grid according to voltage detection signal, microprocessor postpones to export after ta to open and controls signal to control relay circuit and control signal to control relay circuit turn off with during the next voltage zero-cross of control relay after tb to open during the next voltage zero-cross of control relay after ta or to export after postponing tb to turn off.That is to say the time delay ta time when first time voltage zero-cross, now export control signal, then just actual open-minded after relay meeting time delay t11, because the magnitude of voltage that ta+t11 time point is corresponding is within the scope of zero passage voltage, then relay actual is opened the moment and all carries out within the scope of zero passage voltage, in like manner, the shutoff moment also all carries out within the scope of voltage zero-cross, thus realize relay zero-crossing and open or turn off, make the opening process of relay like this, turn off process all carries out within the scope of zero passage voltage, not only can improve the useful life of relay, improve the reliability of circuit, the interference to power supply grid can also be avoided, improve the stability of power supply grid.
In addition, embodiments of the invention also proposed a kind of electromagnetic oven, and it comprises the control device of above-mentioned relay.
The electromagnetic oven of the embodiment of the present invention, when opening by the control device control relay of relay or turn off, the opening process of relay, turn off process can be made all to carry out under no-voltage, not only can improve the useful life of relay, improve the reliability of circuit, the interference to power supply grid can also be avoided, improve the stability of power supply grid.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this specification, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasablely edit read-only memory (EPROM or flash memory), fiber device, and portable optic disk read-only memory (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the application-specific integrated circuit (ASIC) of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (11)
1. a control method for relay, is characterized in that, comprises the following steps:
Obtain the Mechanical recanalization delay time t11 of relay and mechanical turn off delay time time t21;
What obtain described relay according to the no-voltage cycle T of power supply grid and the Mechanical recanalization delay time t11 of described relay and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb;
When the voltage zero-cross of described power supply grid, export after postponing described ta and open control signal and turn off control signal turn off to control described relay to control described relay and open or to export after postponing described tb, the magnitude of voltage wherein corresponding to t11+ta and t21+tb two time points is all within the scope of voltage zero-cross.
2. the control method of relay as claimed in claim 1, is characterized in that, the Mechanical recanalization delay time t11 obtaining relay specifically comprises:
Export described open control signal to described relay time, control the first timer and start timing, and the situation of opening of described relay is detected;
When detecting that described relay is opened completely, terminate when controlling described first timer, wherein, the timing time of described first timer is the Mechanical recanalization delay time t11 of described relay.
3. the control method of relay as claimed in claim 1, is characterized in that, the mechanical turn off delay time time t21 obtaining relay specifically comprises:
When exporting described shutoff and controlling signal to described relay, control the second timer and start timing, and the shutoff situation of described relay is detected;
When detecting that described relay turns off completely, terminate when controlling described second timer, wherein, the timing time of described second timer is the mechanical turn off delay time time t21 of described relay.
4. the control method of relay as claimed in claim 1, it is characterized in that, described ta equals mT-t11, and described tb equals mT-t21, and m is positive integer.
5. the control method of relay as claimed in claim 1, is characterized in that, also comprise:
The voltage of described power supply grid is detected, and when the voltage of described power supply grid is less than or equal to predeterminated voltage, judges the voltage zero-cross of described power supply grid.
6. a control device for relay, is characterized in that, comprising:
Voltage detecting circuit, described voltage detecting circuit is used for detecting with formation voltage detection signal to the voltage of power supply grid;
Control relay circuit, described control relay circuit is used for control relay and opens or turn off;
Microprocessor, described microprocessor is connected with described control relay circuit with described voltage detecting circuit respectively, what described microprocessor obtained described relay according to the Mechanical recanalization delay time t11 of the no-voltage cycle T of described power supply grid and the described relay of acquisition and mechanical turn off delay time time t21 opens delay time ta and turn off delay time time tb, and when judging the voltage zero-cross of described power supply grid according to described voltage detection signal, export after described microprocessor postpones described ta to open and control signal to described control relay circuit and control signal to described control relay circuit turn off to control described relay to control described relay and open or to export shutoff after postponing described tb, magnitude of voltage wherein corresponding to t11+ta and t21+tb two time points is all within the scope of voltage zero-cross.
7. the control device of relay as claimed in claim 6, it is characterized in that, also comprise relay test circuit, described relay test circuit is for detecting situation of opening and the shutoff situation of described relay, and described microprocessor comprises the first timer, described microprocessor export described open control signal to described control relay circuit time, control described first timer and start timing, and when described relay test electric circuit inspection is opened completely to described relay, terminate during the first timer described in described Microprocessor S3C44B0X, wherein, the timing time of described first timer is the Mechanical recanalization delay time t11 of described relay.
8. the control device of relay as claimed in claim 7, it is characterized in that, described microprocessor also comprises the second timer, described microprocessor is when exporting described shutoff and controlling signal to described control relay circuit, control described second timer and start timing, and when described relay test electric circuit inspection turns off completely to described relay, terminate during the second timer described in described Microprocessor S3C44B0X, wherein, the timing time of described second timer is the mechanical turn off delay time time t21 of described relay.
9. the control device of relay as claimed in claim 6, it is characterized in that, described ta equals mT-t11, and described tb equals mT-t21, and m is positive integer.
10. the control device of relay as claimed in claim 6, it is characterized in that, when described voltage detecting circuit detects that the voltage of described power supply grid is less than or equal to predeterminated voltage, described microprocessor judges the voltage zero-cross of described power supply grid according to described voltage detection signal.
11. 1 kinds of electromagnetic ovens, is characterized in that, comprise the control device of the relay according to any one of claim 6-10.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105977074A (en) * | 2016-06-24 | 2016-09-28 | 华立科技股份有限公司 | Arc-extinguishing method based on relay |
| CN107976573A (en) * | 2017-12-27 | 2018-05-01 | 厦门赛特勒磁电有限公司 | A kind of relay surge voltage current management system |
| CN110448168A (en) * | 2019-08-29 | 2019-11-15 | 九阳股份有限公司 | A kind of method for heating and controlling of boiling water pot |
| CN110535162A (en) * | 2019-09-23 | 2019-12-03 | 阳光电源（上海）有限公司 | A kind of local load starting control method and energy storage inverter of energy storage inverter |
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| WO2010055430A3 (en) * | 2008-11-12 | 2010-08-26 | John Barry Leech | Power Supply Control Device and Method |
| CN201584953U (en) * | 2008-12-27 | 2010-09-15 | 夏小勇 | Single-phase alternating current contactor consisting of low loss alternating current electronic switch circuit |
| CN102510081A (en) * | 2011-09-30 | 2012-06-20 | 深圳市英威腾电气股份有限公司 | Zero-cross control circuit, method and system of photovoltaic network disconnection relay |
| CN103326193A (en) * | 2013-06-05 | 2013-09-25 | 哈尔滨工程大学 | Electronic arc suppression power socket |
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| WO2010055430A3 (en) * | 2008-11-12 | 2010-08-26 | John Barry Leech | Power Supply Control Device and Method |
| CN201584953U (en) * | 2008-12-27 | 2010-09-15 | 夏小勇 | Single-phase alternating current contactor consisting of low loss alternating current electronic switch circuit |
| CN102510081A (en) * | 2011-09-30 | 2012-06-20 | 深圳市英威腾电气股份有限公司 | Zero-cross control circuit, method and system of photovoltaic network disconnection relay |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977074A (en) * | 2016-06-24 | 2016-09-28 | 华立科技股份有限公司 | Arc-extinguishing method based on relay |
| CN105977074B (en) * | 2016-06-24 | 2019-03-26 | 华立科技股份有限公司 | Arc extinguishing method based on relay |
| CN107976573A (en) * | 2017-12-27 | 2018-05-01 | 厦门赛特勒磁电有限公司 | A kind of relay surge voltage current management system |
| CN110448168A (en) * | 2019-08-29 | 2019-11-15 | 九阳股份有限公司 | A kind of method for heating and controlling of boiling water pot |
| CN110535162A (en) * | 2019-09-23 | 2019-12-03 | 阳光电源（上海）有限公司 | A kind of local load starting control method and energy storage inverter of energy storage inverter |
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| CN105227164B (en) | 2020-06-30 |
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