CN102832078A - Contactor control device, contactor control system and contactor control method - Google Patents
Contactor control device, contactor control system and contactor control method Download PDFInfo
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- CN102832078A CN102832078A CN2012102865401A CN201210286540A CN102832078A CN 102832078 A CN102832078 A CN 102832078A CN 2012102865401 A CN2012102865401 A CN 2012102865401A CN 201210286540 A CN201210286540 A CN 201210286540A CN 102832078 A CN102832078 A CN 102832078A
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Abstract
The invention provides a contactor control device, a contactor control system and a contactor control method. The contactor control device comprises a high-voltage control circuit and a low-voltage control circuit. The high-voltage control circuit is provided with a high-voltage control input end and is used for being closed or open under the action of control signals inputted from the high-voltage input end, first voltage is provided for a contactor when the high-voltage control circuit is closed, and switching of the contactor is controlled; the low-voltage control circuit is provided with a low-voltage control input end and is used for being closed or open under the action of control signals inputted from the low-voltage input end, second voltage is provided for the contactor when the low-voltage control circuit is closed, a switching state of the contactor is controlled to be maintained, and the second voltage is lower than the first voltage; and the high-voltage control circuit is connected with a fool-proof circuit used for automatically switching off the first voltage applied to the contactor by the high-voltage control circuit after the high-voltage control circuit is closed. According to an embodiment of the invention, the high voltage applied to the contactor can be timely switched off after switching of the contactor is completed in a contactor control process.
Description
Technical field
The embodiment of the invention relates to the contactor control technology, relates in particular to a kind of contactor control device, system and contactor control method.
Background technology
Contactor is a kind of common switching device, and it mainly comprises coil, normally open contact and normally closed interlock, through coil being applied certain voltage; Just can control normally open contact and close, normally closed interlock is opened, wherein; Normally open contact and normally closed interlock are provided with in pairs, and when normally open contact was closed, normally closed interlock was opened; Closing of the normally open contact of control contactor also claimed the switching of contactor.
At present, for improving the reliability of contactor switching, when the contactor switching; Usually adopt the high pressure switching, the mode of low voltage sustain is promptly when the contactor switching; For the coil of contactor provides high pressure and low pressure, guarantee the reliable switching of contactor through the high pressure that applies, after the contactor switching is accomplished; High pressure breaks off, and utilizes low pressure to keep contactor and is in the switching state.In the prior art contactor switching control procedure; Be to control high-voltage control circuit and low-voltage control circuit provides high voltage and low-voltage to contactor respectively through controller; So that utilize the reliable switching of high voltage control contactor; And after detecting the contactor switching; Controller may command high-voltage control circuit stops to contactor provides high voltage, and contactor can be kept the switching state under the low-voltage effect that low-voltage control circuit provides, and avoids the coil in the contactor under action of high voltage, to damage because of overheated for a long time.
But, in the existing contactor switching control procedure, unusual if controller occurs; When for example controller can't detect the contactor switching; High-voltage control circuit will be in conducting state always, and high voltage can be applied on the coil of tentaculum always, causes the coil of contactor to damage because of overheated.
Summary of the invention
The embodiment of the invention provides a kind of contactor control device, system and contactor control method, can be after the contactor switching be accomplished, and disconnection in time is applied to the high voltage on the contactor, avoids contactor coil to produce cause thermal damage because of applying high voltage for a long time.
The embodiment of the invention provides a kind of contactor control device, comprising:
High-voltage control circuit; Have the high voltage control input, said high-voltage control circuit is used for conducting or disconnection under the control signal effect of said high voltage control input input, and when said high-voltage control circuit conducting; For contactor provides first voltage, control said contactor switching;
Low-voltage control circuit; Has the low voltage control input; Said low-voltage control circuit is used for conducting or disconnection under the control signal effect of said low voltage control input input, and when said low-voltage control circuit conducting, for contactor provides second voltage; Control said contactor and keep the switching state, said second voltage is lower than said first voltage;
Said high-voltage control circuit is connected with the fool proof circuit, is used for after said high-voltage control circuit conducting, and the said high-voltage control circuit of automatic disconnection is applied to first voltage on the said contactor.
The embodiment of the invention also provides a kind of contactor control system, comprising:
Contactor control device and contactor that the invention described above embodiment provides;
Said contactor is connected the output of said high-voltage control circuit and low-voltage control circuit.
The embodiment of the invention provides a kind of contactor control method in addition, comprising:
For high-voltage control circuit and low-voltage control circuit provide control signal, to control said high-voltage control circuit and low-voltage control circuit and apply first voltage and second voltage respectively to contactor, said first voltage is greater than said second voltage;
Utilize the fool proof circuit that is connected with said high-voltage control circuit, make said contactor behind switching under said first voltage and the second voltage effect, automatic disconnection is applied to said first voltage on the said contactor through said high-voltage control circuit.
The contactor control device that the embodiment of the invention provides, system and contactor control method; Through the fool proof circuit being set providing on the high-tension high-voltage control circuit for contactor; Make that but automatic disconnection is applied to the high voltage on the contactor through high-voltage control circuit behind the contactor switching; After avoiding the contactor switching; High voltage continues to be applied on the contactor and causes contactor coil to cross cause thermal damage, on the basis of guaranteeing the reliable switching of contactor, can effectively improve the stability and the reliability of contactor work.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the contactor control device that Fig. 1 provides for the embodiment of the invention one;
The structural representation of the contactor control device that Fig. 2 provides for the embodiment of the invention two;
The structural representation of the physical circuit of the contactor control device that Fig. 3 provides for the embodiment of the invention three;
The structural representation of the contactor control device that Fig. 4 provides for the embodiment of the invention four;
Fig. 5 is the input of input control circuit in the embodiment of the invention and the level waveform sketch map of output;
The structural representation of input control circuit in the contactor control device that Fig. 6 provides for the embodiment of the invention five;
The structural representation of the contactor control device that Fig. 7 provides for the embodiment of the invention six;
The structural representation of the contactor control system that Fig. 8 provides for the embodiment of the invention seven;
The structural representation of the contactor control system that Fig. 9 provides for the embodiment of the invention seven;
The schematic flow sheet of the contactor control method that Figure 10 provides for the embodiment of the invention eight;
The schematic flow sheet of the contactor control method that Figure 11 provides for the embodiment of the invention nine;
The schematic flow sheet of the contactor control method that Figure 12 provides for the embodiment of the invention ten.
Embodiment
For making the object of the invention, technical scheme and advantage clearer; To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention carried out clear, intactly description, obviously; Described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.
The structural representation of the contactor control device that Fig. 1 provides for the embodiment of the invention one.As shown in Figure 1, present embodiment contactor control device 1 comprises: high-voltage control circuit 11 and low-voltage control circuit 12, wherein:
High-voltage control circuit 11 has high voltage control input 111; This high-voltage control circuit 11 can conducting or disconnection under the control signal Vc1 effect of high voltage control input 111 input; And when high-voltage control circuit 11 conductings; Can be contactor 2 first voltage be provided, i.e. high voltage V1, make contactor 2 can be under this high voltage V1 effect switching;
Low-voltage control circuit 12 has low voltage control input 121; This low-voltage control circuit 12 can conducting or disconnection under the control signal Vc2 of low voltage control input 121 input; And when low-voltage control circuit 12 conductings; For contactor 2 provides second voltage, promptly low-voltage V2 makes contactor 2 to keep the switching state at low-voltage V2;
High voltage control circuit 11 is connected with fool proof circuit 13, and this fool proof circuit 13 can be after high-voltage control circuit 11 conductings, and this high-voltage control circuit 13 of automatic disconnection is applied to the high voltage V1 on the contactor 2.
Present embodiment contactor control device 1 can be controlled contactor 2 switchings; Particularly, this contactor control device 1 is control device externally, for example under the control signal effect of controller input; For the coil in the contactor 2 21 provides high voltage and low-voltage, with the switching of control contactor 2; Simultaneously; After contactor 2 switchings are accomplished; Can pass through this high-voltage control circuit 13 of fool proof circuit 13 automatic disconnections, the high voltage V1 that is applied on the coil 21 of contactor 2 through high-voltage control circuit 13 is broken off, avoid coil 21 to apply high voltage for a long time and cause coil to cross cause thermal damage; And low-voltage V2 can be applied on the contactor 2 always, keeps the switching state of contactor 2.
It will be understood by those skilled in the art that when the coil 21 of contactor 2 feeds high voltage V1 can make the normally closed interlock 22 of contactor 2 open, normally open contact 23 breaks off, thereby make contactor 2 realize switching.Because the relative low-voltage V2 of high voltage V1 is applied on the coil 21 and can produces bigger magnetic field, therefore can make the switching of contactor 2 reliably to accomplish, after contactor 2 switchings are accomplished, just can utilize low-voltage V2 to keep the switching action.
It will be understood by those skilled in the art that among each embodiment of the invention described above that high voltage V1 and low-voltage V2 are being commonly called as of a relative voltage size; For different contactors, the size of this high voltage V1 and low-voltage V2 can be different, for example; High voltage V1 can be 12V for 180V, low-voltage V2; Perhaps, high voltage V1 also can be 300V, and low-voltage is 15V etc.In the practical application, can be according to the model of contactor etc., the high voltage V1 and the low-voltage V2 of suitable voltage size is set.
To sum up; The contactor control device that present embodiment provides through the fool proof circuit being set providing for contactor on the high-tension high-voltage control circuit, but makes that automatic disconnection is applied to the high voltage on the contactor through high-voltage control circuit behind the contactor switching; After avoiding the contactor switching; High voltage continues to be applied on the contactor and the contactor coil that causes is crossed cause thermal damage, on the basis of guaranteeing the reliable switching of contactor, can effectively improve the stability and the reliability of contactor work.
The structural representation of the contactor control device that Fig. 2 provides for the embodiment of the invention two.In the present embodiment, the fool proof circuit that is connected with high-voltage control circuit can be the normally closed interlock on the contactor, and is as shown in Figure 2 particularly, and in the present embodiment contactor control device 1, high-voltage control circuit 11 specifically can comprise:
Likewise; Low-voltage control circuit 12 can have the second switch circuit 122 and the second electromagnetism relay switch circuit 123; Wherein, Second switch circuit 122 can be under the high voltage level signal effect of low voltage control input 121 inputs, and the conducting second electromagnetism relay switch circuit 123 makes low-voltage V2 be applied on the coil 21 of contactor 2 through the second electromagnetism relay switch circuit 123.
The fool proof circuit is the output that is connected on high-voltage control circuit 11; Be the normally closed interlock 22 of contactor 2 of the output of the above-mentioned first electromagnetism relay switch circuit 113, like this, when high voltage V1 is applied on the coil 21 of contactor 2 through high-voltage control circuit 11; The normally open contact 23 of contactor 2 is closed; When being contactor 2 switchings, the normally closed interlock 22 of contactor 2 will be opened, at this moment; High-voltage control circuit 11 will break off with the coil 21 of contactor 2, breaks off being applied to the high voltage V1 on the coil 21.
In the present embodiment, can be provided with two ports that are connected with normally closed interlock 22 two ends, when needs are controlled contactor 2, can connect normally closed interlock 22, make normally closed interlock 22 as the fool proof circuit through these two ports at the output of high-voltage control circuit 11.
In the practical application, this normally closed interlock 22 also can be serially connected in the input of high-voltage control circuit 11, promptly is serially connected in high voltage control input 111 places; When contactor 2 under high voltage V1 effect during switching; The normally closed interlock 22 of contactor 2 will be opened, and at this moment, the high level signal that inputs to high voltage control input 111 will be blocked; High-voltage control circuit 11 will break off, and the high voltage V1 that is applied on the coil 21 also just is disconnected.Correspondingly, two ports that are connected with normally closed interlock 22 two ends of setting can be arranged on the input of high-voltage control circuit 11.It will be understood by those skilled in the art that also can normally closed interlock 22 be serially connected in other positions of high-voltage control circuit 11, as long as can break off the high voltage V1 that is applied on the contactor 2.
The structural representation of the physical circuit of the contactor control device that Fig. 3 provides for the embodiment of the invention three.On above-mentioned technical scheme embodiment illustrated in fig. 2 basis, as shown in Figure 3, first switching circuit 112 specifically can be transistor switching circuit, triode Q1 as shown in Figure 3 and relevant auxiliary capacitor C1 and resistance R 1; The first electromagnetism relay switch circuit 113 is specially the electromagnetic relay circuit, electromagnetic relay K1 as shown in Figure 2 and booster diode D1; High voltage V1 is connected with the port 3 of electromagnetic relay K1; The port 2 of electromagnetic relay K1 is connected with the coil 21 of contactor 2; The port one of electromagnetic relay K1; An end that is the coil of electromagnetic relay K1 is connected with voltage V0 connection, the port 5 of electromagnetic relay K1, and promptly the other end of the coil of electromagnetic relay K1 is connected with the collector electrode C of triode Q1; Also can be connected with resistance R and capacitor C etc. between high voltage V1 and the electromagnetic relay K1 and form auxiliary circuit.Wherein, V0 is used for being applied on the coil of electromagnetic relay K1, with control normally open contact wherein port 2 and port 3 is communicated with; The base stage B of triode Q1 is exactly above-mentioned high voltage control input.
Particularly, as shown in Figure 3, when the input of triode Q1; When being base stage B feeding high level signal Vc1, triode Q1 conducting, then V0 will be applied to the coil of electromagnetic relay K1; Make the normally open contact of electromagnetic relay K1 be connected port 2 and port 3, like this, high voltage V1 will be applied on the coil 21 of contactor 2; The normally open contact 23 of control contactor 2 is closed, and contactor 2 carries out switching.
It will be understood by those skilled in the art that above-mentioned triode Q1, electromagnetic relay K1 and electric capacity, resistance, diode etc. can select suitable model according to actual needs.Wherein, electromagnetic relay K1 can be the electromagnetic relay of conventional model, and its concrete operation principle repeats no more at this.
In the present embodiment, as shown in Figure 3, the above-mentioned second switch circuit 122 and the second electromagnetism relay switch circuit 123 can have and above-mentioned first switching circuit 112 and the first electromagnetism relay switch circuit, 113 similar circuit structures, repeat no more at this.
In the present embodiment; As shown in Figure 3; The voltage V0 that is applied to the port one of electromagnetic relay K1 and the electromagnetic relay K2 in the second electromagnetism relay switch circuit 123 in the first electromagnetism relay switch circuit 113 can be obtained through filter circuit by V0'; This filter circuit can be made up of the capacitor C of parallel connection and the magnetic bead B of series connection, and physical circuit is realized identical with traditional filter circuit or similar, repeats no more at this.
In the present embodiment, as shown in Figure 3, when the coil 21 of contactor 2 is connected the output of high-voltage control circuit 11 and low-voltage control circuit 12, also be connected with auxiliary circuits such as capacitor C, diode D, be applied to the stability of coil 21 voltages of contactor 2 with raising.
In the present embodiment; As shown in Figure 3; For preventing that high-voltage control circuit 11 is applied to high voltage V1 on the coil 21 to the influence of low-voltage control circuit 12; Can be connected with single-phase turning circuit between low-voltage control circuit 12 and the coil 21, diode D' as shown in Figure 3 is to guarantee the isolation between high-voltage control circuit 11 and the low-voltage control circuit 12.
It will be understood by those skilled in the art that triode, the electromagnetic relay of electric capacity, resistance and suitable types or the specification that can select suitable size in the practical application as required, do not do special restriction in this embodiment of the invention.
It will be appreciated by those skilled in the art that; In the practical application; The high-voltage control circuit that provides except above-mentioned Fig. 3 and the physical circuit of low-voltage control circuit are realized; Also can realize, as long as can under the control of control signal, can give unnecessary details no longer one by one at this for contactor provides voltage through other conventional voltage control circuits.
The structural representation of the contactor control device that Fig. 4 provides for the embodiment of the invention four.Different with technical scheme embodiment illustrated in fig. 3 with above-mentioned Fig. 2 is; Fool proof circuit in the present embodiment is the input control circuit 14 that is serially connected in the high voltage control input 111 of high-voltage control circuit 11; This input control circuit 14 can be used for detecting the control signal of high voltage control input 111 inputs; And when the control signal that detects input is high level signal, the high pulse signal that output has preset pulsewidth.
In the present embodiment, input control circuit 14 detects high voltage control input 111 has high level signal when input, can convert this high level signal into high pulse signal; Like this, high-voltage control circuit 11 will conducting under the high pulse signal effect, and high voltage V1 will be applied on the coil 21 of contactor 2; Make contactor 2 switchings, and when high pulse signal by high level during to low level, high-voltage control circuit 11 will break off; At this moment; High voltage V1 will break off with coil 21, therefore, utilize high pulse signal control contactor 2 switchings after; But automatic disconnection high voltage V1 makes contactor 2 under the low-voltage V2 effect that low-voltage control circuit 12 applies, keep the switching state.
It will be appreciated by those skilled in the art that; The high level of above-mentioned high pulse signal is identical with the high level signal size of high voltage control input 111 inputs; And have certain pulsewidth, this pulsewidth can be provided with according to actual needs in advance, can guarantee contactor 2 switchings as long as the size of this preset pulsewidth can guarantee holding time of high level wherein; Actual size can be according to the ON time of high-voltage control circuit 11, and the decision of the switching time of contactor 2.
Fig. 5 is the input of input control circuit in the embodiment of the invention and the level waveform sketch map of output.As shown in Figure 5; When input control circuit 14 detects the control signal that inputs to high voltage control input 111 and is high level signal A1; It will export a high pulse signal A2, and it is exactly in fact to convert the high level signal that peripheral control unit is imported into high pulse signal output.It will be understood by those skilled in the art that when input control circuit 14 detects control signal and is low level signal that then do not do any processing, the level of its output also is a low level signal.
The structural representation of input control circuit in the contactor control device that Fig. 6 provides for the embodiment of the invention five.On above-mentioned technical scheme embodiment illustrated in fig. 4 basis, as shown in Figure 6, input control circuit 14 specifically can comprise detecting signal unit 141 and signal output control unit 142 in the present embodiment, wherein:
Detecting signal unit 141 is used to detect the incoming level signal of high voltage control input;
Signal output control unit 142, when being used for incoming level signal that detecting signal unit 141 detects and being high level signal, the output high pulse signal.
In the present embodiment, input control circuit 14 can detect the incoming level of high voltage control input in real time through detecting signal unit 141, and can convert the high level of importing into high pulse signal output by signal output control unit 142.
It will be appreciated by those skilled in the art that; In above-mentioned Fig. 1-Fig. 4, the contactor control device practical application shown in Figure 6; Can be connected with controller with contactor respectively; The high-voltage control circuit in this contactor control device of its middle controller may command and the conducting or the disconnection of low-voltage control circuit, promptly present embodiment contactor control device can be used as the separate equipment individualism.
In addition, the function that present embodiment contactor control device also can integrated this controller will describe with an instantiation below.
The structural representation of the contactor control device that Fig. 7 provides for the embodiment of the invention six.On the basis of above-mentioned Fig. 1-Fig. 4, the arbitrary illustrated embodiment technical scheme of Fig. 6; As shown in Figure 7; The present embodiment control device also can be provided with control module 10; This control module 10 can be used for to high voltage control input 111 and low voltage control input 121 transmit control signal respectively Vc1 and Vc2, and this control signal is high level signal or low level signal.
In the present embodiment; When needs control contactor 2 switchings; This control module 10 just can be through sending high level signal respectively to high voltage control input 111 and low voltage control input 121; Make high voltage V1 and low-voltage V2 can be respectively be applied on the coil 21 of contactor 2 through high voltage control circuit 11 and low-voltage control circuit 12, make contactor 2 can be under high voltage V1 effect reliable switching; Simultaneously; This control module 10 also can be used for detecting contactor 2, and whether switching is successful; And when merit is cut in contactor throwing 2; With the control signal that is sent to high voltage control input 111 clear 0 or switch to low level signal, break off high-voltage control circuit 11, make the high voltage V1 that is applied on the contactor 2 break off.
It will be understood by those skilled in the art that this control module 10 specifically can be a microprocessor, it can transmit control signal according to user's instruction, and control high-voltage control circuit 11 and low-voltage control circuit 12 work are with the switching of control contactor 2.
It will be appreciated by those skilled in the art that; Among each embodiment of the invention described above; High level signal and low level signal as control signal are being commonly called as of a relative voltage swing, usually, can be 3V, 3.3V, 5V or other as the voltage swing of high level signal; Corresponding low level signal can be the voltage that is lower than high level signal, for example 0V, 0.5V etc.To those skilled in the art, can in a control circuit, the high level signal and the low level signal of certain voltage size can be set according to the circuit conditions of reality.
The structural representation of the contactor control system that Fig. 8 provides for the embodiment of the invention seven.As shown in Figure 8; Present embodiment contactor control system can comprise like Fig. 1-4, contactor control device 1 shown in Figure 6; And contactor 2; Contactor 2 is connected the high-voltage control circuit 11 of contactor control device 1 and the output of low-voltage control circuit 12, and wherein the concrete structure of contactor control device 1 can repeat no more at this referring to above-mentioned Fig. 1-4, shown in Figure 6.
In the present embodiment; Contactor control device 1 also can be connected with controller 3, and this controller 3 can be control appliances such as CPU, can transmit control signal to contactor control device 1; So that the conducting or the disconnection of high-voltage control circuit 11 and low-voltage control circuit 12; And and then the switching of control contactor 2, its concrete realization can be repeated no more at this referring to the explanation of the invention described above contactor control device embodiment.
The structural representation of the contactor control system that Fig. 9 provides for the embodiment of the invention seven.Different with above-mentioned system shown in Figure 7 embodiment is; Present embodiment contactor control device 1' can adopt above-mentioned contactor control device shown in Figure 7; This contactor control device 1' is integrated with and is used for control module, and its concrete structure can repeat no more at this referring to above-mentioned shown in Figure 7.
The schematic flow sheet of the contactor control method that Figure 10 provides for the embodiment of the invention eight.Shown in figure 10, present embodiment contactor control method can may further comprise the steps:
The fool proof circuit that step 102, utilization are connected with high-voltage control circuit makes contactor behind switching under first voltage and the second voltage effect, and automatic disconnection is applied to first voltage on the contactor through this high-voltage control circuit.
Embodiment of the invention method can realize that its concrete implementation procedure can repeat no more at this referring to the explanation of the invention described above device embodiment based on the contactor control device that the invention described above embodiment provides.
The schematic flow sheet of the contactor control method that Figure 11 provides for the embodiment of the invention nine.Present embodiment can be realized based on above-mentioned Fig. 2 and contactor control device embodiment illustrated in fig. 3; Wherein, The fool proof circuit is the switch contact that is connected in the high-voltage control circuit, and this switch contact is the normally closed interlock in the contactor, particularly; Shown in figure 11, present embodiment contactor control method can may further comprise the steps:
Present embodiment can be controlled based on the achieve a butt joint switching of tentaculum of above-mentioned Fig. 2 and the contactor control device that provides embodiment illustrated in fig. 3, and its concrete implementation procedure can repeat no more at this referring to above-mentioned Fig. 2 and explanation embodiment illustrated in fig. 3.
The schematic flow sheet of the contactor control method that Figure 12 provides for the embodiment of the invention ten.Present embodiment can be realized based on above-mentioned Fig. 4, Fig. 5, contactor control device embodiment illustrated in fig. 6; Wherein, the fool proof circuit is the input control circuit that is serially connected in the input of high-voltage control circuit, particularly; Shown in figure 12, present embodiment contactor control method can may further comprise the steps:
After the control signal that step 302, the input that utilizes the input control circuit to detect high-voltage control circuit are imported; The high pulse signal that output has preset pulsewidth; Provide first voltage of presetting the pulsewidth duration to contactor with the control high-voltage control circuit; So that contactor is behind switching under first voltage of preset pulsewidth duration and the second voltage effect, automatic disconnection is applied to first voltage on the contactor through high-voltage control circuit.
Present embodiment can be controlled based on the achieve a butt joint switching of tentaculum of above-mentioned Fig. 4, Fig. 5 and the contactor control device that provides embodiment illustrated in fig. 6, and its concrete implementation procedure can repeat no more at this referring to above-mentioned Fig. 4, Fig. 5 and explanation embodiment illustrated in fig. 6.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (13)
1. a contactor control device is characterized in that, comprising:
High-voltage control circuit; Have the high voltage control input, said high-voltage control circuit is used for conducting or disconnection under the control signal effect of said high voltage control input input, and when said high-voltage control circuit conducting; For contactor provides first voltage, control said contactor switching;
Low-voltage control circuit; Has the low voltage control input; Said low-voltage control circuit is used for conducting or disconnection under the control signal effect of said low voltage control input input, and when said low-voltage control circuit conducting, for contactor provides second voltage; Control said contactor and keep the switching state, said second voltage is lower than said first voltage;
Said high-voltage control circuit is connected with the fool proof circuit, is used for after said high-voltage control circuit conducting, and the said high-voltage control circuit of automatic disconnection is applied to first voltage on the said contactor.
2. contactor control device according to claim 1 is characterized in that, said fool proof circuit is the switch contact that is connected in the said high-voltage control circuit;
Said switch contact is the normally closed interlock in the contactor.
3. contactor control device according to claim 1 is characterized in that, said fool proof circuit is the input control circuit that is serially connected in said high voltage control input;
Said input control circuit, when being used to detect said high voltage control input input high level signal, the high pulse signal that output has preset pulsewidth.
4. contactor control device according to claim 3 is characterized in that, said input control circuit comprises:
Detecting signal unit is used to detect the incoming level signal of said high voltage control input;
The signal output control unit when being used for incoming level signal that said detecting signal unit detects and being high level signal, is exported said high pulse signal.
5. contactor control device according to claim 1 is characterized in that, also comprises:
Control module is used for transmitting control signal respectively to said high voltage control input and low voltage control input, and said control signal is high level signal or low level signal.
6. contactor control device according to claim 5; It is characterized in that, said control module, whether switching is successful also to be used to detect said contactor; And when the success of said contactor switching, with the control signal that is sent to said high voltage control input clear 0 or switch to low level signal.
7. according to the arbitrary described contactor control device of claim 1-6, it is characterized in that said high-voltage control circuit comprises:
First switching circuit is used for conducting or disconnection under the control signal effect of said high voltage control input input;
The first electromagnetism relay switch circuit is used for when the said first switching circuit conducting, said first voltage being offered on the said contactor.
8. contactor control device according to claim 7 is characterized in that, said low-voltage control circuit comprises:
The second switch circuit is used for conducting or disconnection under the control signal effect of said low voltage control input input;
The second electromagnetism relay switch circuit is used for when said second switch circuit turn-on, said second voltage being offered on the said contactor.
9. contactor control device according to claim 7 is characterized in that, said first switching circuit is a transistor switching circuit; The said first electromagnetism relay switch circuit is an electromagnetic relay.
10. a contactor control system is characterized in that, comprising:
Aforesaid right requires arbitrary described contactor control device of 1-9 and contactor;
Said contactor is connected the output of said high-voltage control circuit and low-voltage control circuit.
11. a contactor control method is characterized in that, comprising:
For high-voltage control circuit and low-voltage control circuit provide control signal, to control said high-voltage control circuit and low-voltage control circuit and apply first voltage and second voltage respectively to contactor, said first voltage is greater than said second voltage;
Utilize the fool proof circuit that is connected with said high-voltage control circuit, make said contactor behind switching under said first voltage and the second voltage effect, automatic disconnection is applied to said first voltage on the said contactor through said high-voltage control circuit.
12. contactor control method according to claim 11 is characterized in that, said fool proof circuit is the switch contact that is connected in the said high-voltage control circuit, and said switch contact is the normally closed interlock in the said contactor;
The fool proof circuit that said utilization is connected with said high-voltage control circuit, automatic disconnection comprises through said first voltage that said high-voltage control circuit is applied on the said contactor behind said contactor switching:
Said contactor is behind switching under said first voltage and the second voltage effect; Utilization is in the said normally closed interlock of off-state; Being electrically connected between the said high-voltage control circuit of automatic disconnection and the said contactor, thus automatic disconnection is applied to said first voltage on the said contactor through said high-voltage control circuit.
13. contactor control method according to claim 11 is characterized in that, said fool proof circuit is the input control circuit that is serially connected in the input of said high-voltage control circuit;
The fool proof circuit that said utilization is connected with said high-voltage control circuit makes said contactor behind switching under said first voltage and the second voltage effect, and automatic disconnection comprises through said first voltage that said high-voltage control circuit is applied on the said contactor:
After the control signal that the input that utilizes said input control circuit to detect said high-voltage control circuit is imported; The high pulse signal that output has preset pulsewidth; To control said high-voltage control circuit first voltage to the said contactor of said preset pulsewidth duration is provided; So that said contactor is behind switching under first voltage of said preset pulsewidth duration and the said second voltage effect, automatic disconnection is applied to said first voltage on the said contactor through said high-voltage control circuit.
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| CN2012102865401A CN102832078A (en) | 2012-08-13 | 2012-08-13 | Contactor control device, contactor control system and contactor control method |
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| CN2012102865401A CN102832078A (en) | 2012-08-13 | 2012-08-13 | Contactor control device, contactor control system and contactor control method |
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| CN104715972A (en) * | 2015-04-04 | 2015-06-17 | 佛山蓝途科技有限公司 | Double-power-supply automatic changeover switching device |
| CN110043481A (en) * | 2019-04-09 | 2019-07-23 | 中国石油化工股份有限公司 | A kind of latent oil Rodless oil extraction equipment is anti-reverse to restart protective device |
| WO2020172924A1 (en) * | 2019-02-28 | 2020-09-03 | 施耐德电器工业公司 | Control method and control device |
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Application publication date: 20121219 |