CN221040963U - Contactor control device and contactor system - Google Patents
Contactor control device and contactor system Download PDFInfo
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- CN221040963U CN221040963U CN202322878617.0U CN202322878617U CN221040963U CN 221040963 U CN221040963 U CN 221040963U CN 202322878617 U CN202322878617 U CN 202322878617U CN 221040963 U CN221040963 U CN 221040963U
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Abstract
The utility model provides a contactor control device and a contactor system, comprising: a contactor coil control module and a PLC control module which are packaged separately; the contactor coil control module comprises a first control circuit and a first identification circuit, and the PLC control module comprises a second control circuit and a second identification circuit; the first input end of the first control circuit is electrically connected with the output end of the second control circuit, the second input end of the first control circuit is electrically connected with the output end of the first identification circuit, the input end of the first identification circuit is electrically connected with the second identification circuit, and the output end of the first control circuit is electrically connected with the contactor coil; the first identification circuit is used for feeding back a first voltage signal to the first control circuit when the second identification circuit is not connected, and is used for feeding back a second voltage signal to the first control circuit when the second identification circuit is electrically connected. The cost of non-PLC users is reduced; and knows the control mode selected by the current user; false triggering of the selection switch can also be avoided.
Description
Technical Field
The utility model relates to the technical field of contactors, in particular to a contactor control device and a contactor system.
Background
Contactors are electrical switching devices commonly used to control current and voltage in electrical power systems. It is typically comprised of a solenoid and a pair of movable contacts. When the coil is electrified, the generated magnetic field attracts the movable contact to close so as to make contact with the fixed contact, thereby completing the closing of the circuit. When the coil is powered off, the contact returns to the original position, and the circuit is disconnected, so that the breaking of the circuit is realized. Contactors are widely used to control and protect motors, generators, transformers, and other high power equipment. It can bear large current and voltage, and has good switching capacity and reliability. Contactors are also used in the fields of automation systems, household appliances, etc.
In automatic control, a PLC (programmable logic controller) is required to be used for controlling the connection and disconnection of a contactor to operate load equipment, the starting current of the contactor is particularly high, an intermediate relay is required to be added to the PLC for controlling a contactor coil, and the starting current is high, so that the impact on the intermediate relay is high, and the service life of the intermediate relay is short. Therefore, the electronic module is used in the high-power contactor, as shown in fig. 1, and a PLC control module is added in the electronic module for receiving a control level instruction sent by the PLC from the DO port to operate the contactor, and an S selection switch (i.e. a dial switch) is added in the same structure of the PLC control module and the contactor coil control module so as to adapt to PLC control users and non-PLC users, and the requirements of different users are met by operating the S selection switch to select whether the PLC control module is accessed or not. But the cost of the PLC control module and the selection switch is required for the non-PLC user (the non-PLC user can control the on or off of the contactor by controlling the on or off of the terminal A1\A2); in addition, the S selector switch is exposed to the outside of the contactor, and there are unreliable factors such as false triggering, and even PLC users need to consider the reliability problem of the S selector switch.
Disclosure of utility model
Aiming at the defects existing in the prior art, the utility model provides a contactor control device and a contactor system.
In a first aspect, in one embodiment, the present utility model provides a contactor control apparatus comprising:
The contactor coil control module and the PLC control module; the contactor coil control module and the PLC control module are respectively packaged in a first packaging structure and a second packaging structure;
The contactor coil control module comprises a first control circuit and a first identification circuit, and the PLC control module comprises a second control circuit and a second identification circuit;
The second packaging structure can be used for being electrically connected with the first packaging structure, when the second packaging structure is electrically connected with the first packaging structure, the first input end of the first control circuit is electrically connected with the output end of the second control circuit, the second input end of the first control circuit is electrically connected with the output end of the first identification circuit, the input end of the first identification circuit is electrically connected with the second identification circuit, and the output end of the first control circuit is electrically connected with the contactor coil;
The first identification circuit is used for feeding back a first voltage signal to the first control circuit when the second identification circuit is not connected, and is used for feeding back a second voltage signal to the first control circuit when the second identification circuit is electrically connected.
In one embodiment, the first identification circuit comprises a first resistor and the second identification circuit comprises a second resistor;
After the first identification circuit is electrically connected with the second identification circuit, the first resistor and the second resistor form a series voltage dividing resistor network, and the second input end of the first control circuit is electrically connected with the first resistor and the second resistor respectively;
one end of the first resistor, which is far away from the second resistor, is connected with working voltage, and one end of the second resistor, which is far away from the first resistor, is grounded; or one end of the second resistor far away from the first resistor is connected with the working voltage, and the other end of the first resistor far away from the second resistor is grounded.
In one embodiment, the first identification circuit further comprises a first bi-directional TVS tube;
The first anode of the first bidirectional TVS tube is electrically connected with the second input end of the first control circuit, and the second anode of the first bidirectional TVS tube is grounded.
In one embodiment, the contactor coil control module further comprises a first isolation drive circuit, and the PLC control module further comprises a second isolation drive circuit;
The output end of the first isolation driving circuit is electrically connected with the first input end of the first control circuit, and the input end of the second isolation driving circuit is electrically connected with the output end of the second control circuit; when the second packaging structure is electrically connected with the first packaging structure, the input end of the first isolation driving circuit is electrically connected with the output end of the second isolation driving circuit.
In one embodiment, the first isolation driving circuit includes a third resistor and the second isolation driving circuit includes a photo coupler;
The first end of the third resistor is connected with the working voltage, the second end of the third resistor is respectively and electrically connected with the first input end of the first control circuit and the collector electrode of the phototriode in the photoelectric coupler, the emitter electrode of the phototriode in the photoelectric coupler is grounded, and the light emitting diode in the photoelectric coupler is electrically connected with the output end of the second control circuit.
In one embodiment, the first isolation driving circuit includes a second bi-directional TVS tube and/or the second isolation driving circuit includes a third bi-directional TVS tube;
The first anode of the second bidirectional TVS tube is electrically connected with the first input end of the first control circuit, and the second anode of the second bidirectional TVS tube is grounded;
The first anode of the third bidirectional TVS tube is electrically connected with the collector electrode of the phototriode in the photoelectric coupler, and the second anode of the third bidirectional TVS tube is grounded.
In one embodiment, the first control circuit includes a power supply unit, a switch control unit, a driving unit, and a control unit;
the first input end of the control unit is electrically connected with the output end of the second control circuit, and the second input end of the control unit is electrically connected with the output end of the first identification circuit;
The power supply unit is respectively and electrically connected with the switch control unit, the driving unit, the control unit and the first identification circuit and is used for providing working voltage;
the switch control unit is connected with the contactor coil in series and is used for controlling the power-on or power-off of the contactor coil according to the switch state;
The input end of the driving unit is electrically connected with the output end of the control unit, the output end of the driving unit is electrically connected with the switch control unit, and the driving unit is used for controlling the switch state of the switch control unit according to the driving signal output by the control unit.
In one embodiment, the switch control unit comprises a first MOS tube, a second MOS tube, a freewheel diode and an energy storage capacitor;
The drain electrode of the first MOS tube is electrically connected with the first end of the contactor coil, the second end of the contactor coil is respectively electrically connected with the cathode of the freewheel diode and the power supply unit, and the anode of the freewheel diode is respectively electrically connected with the source electrode of the first MOS tube and the drain electrode of the second MOS tube;
The first end of the energy storage capacitor is electrically connected with the grid electrode of the first MOS tube and the power supply unit respectively, and the second end of the energy storage capacitor is electrically connected with the source electrode of the first MOS tube and the drain electrode of the second MOS tube respectively;
The source electrode of the second MOS tube is grounded, and the grid electrode of the second MOS tube is electrically connected with the output end of the driving unit.
In one embodiment, the switch control unit includes a zener diode;
the cathode of the voltage stabilizing diode is respectively and electrically connected with the grid electrode of the first MOS tube and the power supply unit, and the anode of the voltage stabilizing diode is grounded.
In a second aspect, in one embodiment, the present utility model provides a contactor system comprising a contactor coil, and a contactor control device according to any of the above embodiments.
Through the contactor control device and the contactor system, the contactor coil control module and the PLC control module are packaged independently, and the PLC control module can be used as an optional module, so that the cost of non-PLC users is reduced; the first identification circuit is used for feeding back a first voltage signal to the first control circuit when the second identification circuit is not connected, and is used for feeding back a second voltage signal to the first control circuit when the second identification circuit is electrically connected, so that the first control circuit determines whether the PLC control module is connected or not, and the control mode selected by a current user is further known; in addition, the selection switch can be omitted, the false triggering problem of the selection switch is avoided, and the reliability of the product is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art contactor control apparatus;
FIG. 2 is a schematic view of a contactor control device according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a contactor control device including specific structures of a driving circuit and an identification circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram showing a specific configuration of a first control circuit according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram showing a specific structure of a control unit according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram showing a specific configuration of a second control circuit according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram showing a specific structure of a switch control unit according to an embodiment of the present utility model;
Fig. 8 is a schematic diagram of a specific structure of a power supply unit according to an embodiment of the utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. In the present utility model, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the utility model. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present utility model may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the utility model with unnecessary detail. Thus, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
As shown in fig. 2, in one embodiment, the present utility model provides a contactor control apparatus comprising:
The contactor coil control module and the PLC control module; the contactor coil control module and the PLC control module are respectively packaged in the first package structure 100 and the second package structure 200;
The contactor coil control module comprises a first control circuit and a first identification circuit, and the PLC control module comprises a second control circuit and a second identification circuit;
The second package structure 200 may be used for electrically connecting with the first package structure 100, when the second package structure 200 is electrically connected with the first package structure 100, the first input end of the first control circuit is electrically connected with the output end of the second control circuit, the second input end of the first control circuit is electrically connected with the output end of the first identification circuit, the input end of the first identification circuit is electrically connected with the second identification circuit, and the output end of the first control circuit is electrically connected with the contactor coil;
The first identification circuit is used for feeding back a first voltage signal to the first control circuit when the second identification circuit is not connected, and feeding back a second voltage signal to the first control circuit when the second identification circuit is electrically connected;
The contactor coil control module and the PLC ((programmable logic controller, programmable Logic Controller) are a digital computer system special for industrial automation control, and are used for monitoring input signals, executing logic operations and controlling output equipment), and the control module is packaged in different packaging structures, so that the contactor coil control module and the PLC are connected through corresponding interfaces, namely the contactor coil control module is provided with the corresponding interfaces, the PLC control module is also provided with the corresponding interfaces, and the two interfaces are mutually adapted; after the contactor coil control module and the PLC control module are connected through the interface, a first control circuit in the contactor coil control module is connected with a second control circuit in the PLC control module, and a first identification circuit in the contactor coil control module is connected with a second identification circuit in the PLC control module;
The contactor coil control module is essentially required to control the power-on and power-off of the contactor coil, so that a first control circuit in the contactor coil control module is also electrically connected with the contactor coil; similarly, the PLC control module essentially controls the contactor coil control module according to the instruction sent by the PLC, so that a second control circuit in the PLC control module is also electrically connected with the PLC;
The first identification circuit and the second identification circuit can be matched with each other, so that different first voltage signals and second voltage signals are fed back to the first control circuit under the condition of different connection states; specifically, the first identification circuit may be a series voltage dividing resistor network, the second identification circuit may be a section of wire, when the first identification circuit is not electrically connected with the second identification circuit, the first identification circuit feeds back a corresponding second voltage signal to the first control circuit according to the voltage dividing condition, and when the first identification circuit is electrically connected with the second identification circuit, the second identification circuit shorts at least one resistor in the series voltage dividing resistor network of the first identification circuit, thereby changing the voltage dividing condition of the first identification circuit and feeding back the corresponding first voltage signal to the first control circuit.
Through the contactor control device, the contactor coil control module and the PLC control module are individually packaged, and a corresponding first identification circuit and a corresponding second identification circuit are respectively arranged in the contactor coil control module and the PLC control module, wherein the first identification circuit is used for feeding back a first voltage signal to the first control circuit when the second identification circuit is not connected, and feeding back a second voltage signal to the first control circuit when the second identification circuit is electrically connected, so that the first control circuit determines whether the PLC control module is connected or not, and the control mode selected by a current user is further known; in addition, the selection switch can be omitted, the false triggering problem of the selection switch is avoided, and the reliability of the product is improved. If the contactor coil control module recognizes that the PLC control module is connected, the switching is performed to a PLC control mode, the PLC control module receives signals sent by the PLC, and the contactor coil control module receives signals sent by the PLC control module so as to control the closing and opening of the contactor; if the access of the PLC control module is not recognized, the PLC control module is defaulted to a non-PLC control mode and is not controlled by the PLC.
As shown in fig. 3, in one embodiment, the first identification circuit includes a first resistor R2 and the second identification circuit includes a second resistor R3;
After the first identification circuit is electrically connected with the second identification circuit, the first resistor R2 and the second resistor R3 form a series voltage dividing resistor network, and the second input end (namely an ADC sampling end) of the first control circuit is electrically connected with the first resistor R2 and the second resistor R3 respectively;
one end of the first resistor R2 far away from the second resistor R3 is connected with the working voltage VCC, and one end of the second resistor R3 far away from the first resistor R2 is grounded;
When the first resistor R2 and the second resistor R3 are connected in series, the working voltage VCC sequentially passes through the first resistor R2 and the second resistor R3 and then goes to the ground, the voltage value of the first voltage signal corresponding to the ADC sampling end is r3×vcc/(r2+r3), when the first resistor R2 and the second resistor R3 are disconnected, the working voltage VCC cannot form a loop to the ground, and the voltage value of the second voltage signal corresponding to the ADC sampling end is VCC, so that it can be seen that the voltage values of the first voltage signal and the second voltage signal which are not connected are different, and the first control circuit is enabled to distinguish the connection states according to the voltage values;
In other embodiments, the working voltage may be connected to the end of the second resistor R3 away from the first resistor R2, and the end of the first resistor R2 away from the second resistor R3 is grounded.
As shown in fig. 3, in one embodiment, the first identification circuit further includes a first bidirectional TVS tube TVS3;
The first anode of the first bidirectional TVS tube TVS3 is electrically connected with the second input end (namely the ADC sampling end) of the first control circuit, and the second anode of the first bidirectional TVS tube TVS3 is grounded;
the first bidirectional TVS tube TVS3 is used for clamping the voltage value of the ADC sampling end, so that the first control circuit is prevented from being damaged due to overhigh voltage; the reason for the overlarge voltage mainly comprises two points, wherein the first point is the mutation of the working voltage VCC, and the second point is the input of static electricity because the first identification circuit needs to be connected with the second identification circuit through a corresponding interface, and static electricity can be generated due to the existence of the interface.
As shown in fig. 2, in one embodiment, the contactor coil control module further includes a first isolation driving circuit, and the PLC control module further includes a second isolation driving circuit;
The output end of the first isolation driving circuit is electrically connected with the first input end of the first control circuit, and the input end of the second isolation driving circuit is electrically connected with the output end of the second control circuit; when the second package structure 200 is electrically connected with the first package structure 100, the input end of the first isolation driving circuit is electrically connected with the output end of the second isolation driving circuit;
The isolation driving circuit is used for realizing the transmission of control signals between the PLC control module and the contactor coil control module and realizing electric isolation; the isolation mode can also adopt an electromagnetic isolation mode, namely, the transmission is realized through a transformer.
As shown in fig. 3, in one embodiment, the first isolation driving circuit includes a third resistor R1, and the second isolation driving circuit includes a photo coupler U;
The first end of the third resistor R1 is connected with the working voltage VCC, the second end of the third resistor R1 is respectively and electrically connected with the first input end of the first control circuit and the collector electrode of the phototriode in the photoelectric coupler U, the emitter electrode of the phototriode in the photoelectric coupler U is grounded, and the light emitting diode in the photoelectric coupler U is electrically connected with the output end of the second control circuit;
When the second control circuit needs to close the contactor, the photoelectric coupler U can be driven to be conducted, the working voltage VCC sequentially passes through the third resistor R1 and the phototriode in the photoelectric coupler U and then goes to the ground, and the first input end of the first control circuit is in a low level, namely the ground voltage; when the second control circuit needs to disconnect the contactor, the photoelectric coupler U can be disconnected, the working voltage VCC cannot form a loop to the ground, and the first input end of the first control circuit is at a high level, namely VCC; therefore, the first control circuit realizes the closing and opening of the contactor according to different voltages received by the first input terminal of the first control circuit.
As shown in fig. 3, in one embodiment, the first isolation driving circuit includes a second bidirectional TVS tube TVS1 and the second isolation driving circuit includes a third bidirectional TVS tube TVS2;
The first anode of the second bidirectional TVS tube TVS1 is electrically connected with the first input end of the first control circuit, and the second anode of the second bidirectional TVS tube TVS1 is grounded;
The first anode of the third bidirectional TVS tube TVS2 is electrically connected with the collector electrode of the phototriode in the photoelectric coupler, and the second anode of the third bidirectional TVS tube TVS2 is grounded;
The functions of the second TVS tube TVS1 and the third TVS tube TVS2 are similar to those of the first TVS tube TVS1, and specific reference may be made to the above embodiment, and the description thereof will not be repeated herein;
In other embodiments, if only the abrupt change of the operating voltage VCC is considered, only one of the second bidirectional TVS tube TVS1 and the third bidirectional TVS tube TVS2 may be considered.
As shown in fig. 4, in one embodiment, the first control circuit includes a power supply unit, a switch control unit, a driving unit, and a control unit;
the first input end of the control unit is electrically connected with the output end of the second control circuit, and the second input end of the control unit is electrically connected with the output end of the first identification circuit;
The power supply unit is respectively and electrically connected with the switch control unit, the driving unit, the control unit and the first identification circuit and is used for providing working voltage;
the switch control unit is connected with the contactor coil in series and is used for controlling the power-on or power-off of the contactor coil according to the switch state;
The input end of the driving unit is electrically connected with the output end of the control unit, the output end of the driving unit is electrically connected with the switch control unit, and the driving unit is used for controlling the switch state of the switch control unit according to the driving signal output by the control unit;
the driving unit is mainly used for signal amplification, so that state control of the switch control unit is realized.
As shown in fig. 5, in one embodiment, the control unit includes a single-chip microcomputer U2, a pin 2 of the single-chip microcomputer U2 is electrically connected with a third resistor R1 and the photoelectric coupler (electrically connected with the photoelectric coupler through an interface P3), a pin 6 of the single-chip microcomputer U2 is electrically connected with a first resistor R2 and a first bidirectional TVS tube TVS1, a pin 14 of the single-chip microcomputer U2 is electrically connected with the driving unit, and a pin 16 of the single-chip microcomputer U2 is electrically connected with the power supply unit;
In fig. 5, the capacitor C3 and the resistor R9 are basic devices required for implementing basic functions of the circuit, and are not described herein.
As shown in fig. 6, in one embodiment, the second control circuit includes a resistor R7, a resistor R8, a rectifying unit D, and a bidirectional TVS tube TVS4.
As shown in fig. 7, in one embodiment, the switch control unit includes a first MOS transistor Q1, a second MOS transistor Q2, a freewheeling diode D2, and an energy storage capacitor C1;
The drain electrode of the first MOS tube Q1 is electrically connected with the first end of the contactor coil of the contactor K, the second end of the contactor coil of the contactor K is respectively electrically connected with the cathode of the freewheel diode D2 and the power supply unit (namely, the access working voltage VCC 1), and the anode of the freewheel diode D2 is respectively electrically connected with the source electrode of the first MOS tube Q1 and the drain electrode of the second MOS tube Q2;
The first end of the energy storage capacitor C1 is respectively and electrically connected with the grid electrode of the first MOS tube Q1 and the power supply unit (namely, the access working voltage VCC 1), and the second end of the energy storage capacitor C1 is respectively and electrically connected with the source electrode of the first MOS tube Q1 and the drain electrode of the second MOS tube Q2;
The source electrode of the second MOS tube Q2 is grounded, and the grid electrode of the second MOS tube Q2 is electrically connected with the output end of the driving unit;
When the power supply unit normally outputs working voltage, namely the working voltage VCC1 is high level, the first MOS tube Q1 is conducted, if the driving unit receives a conduction instruction sent by the control unit, the high level is sent to the second MOS tube Q2, the second MOS tube Q2 is conducted, the working voltage VCC1 is input from the second end of the contactor coil of the contactor K, sequentially passes through the first end of the contactor coil of the contactor K, the first MOS tube Q1 and the second MOS tube Q2 and then to the ground, a current loop is formed, the contactor coil of the contactor K is electrified to generate magnetic force, and the corresponding throwing knife is attracted to be closed, so that the closing of the contactor K is realized; similarly, when the power supply unit stops outputting and the driving unit receives the disconnection instruction sent by the control unit, the first MOS tube Q1 and the second MOS tube Q2 are disconnected, so that the contactor coil of the contactor K is powered off, the magnetic force disappears, and the corresponding throwing knife is reset under the action of devices such as a spring and the like, and the disconnection of the contactor K is realized;
it should be noted that, when the working voltage VCC1 is at a high level (i.e., the power supply unit outputs normally), the energy storage capacitor C1 charges, and when the working voltage VCC1 is at a low level (i.e., the power supply unit stops outputting), the first MOS transistor Q1 is continuously turned on, so that the energy current on the contactor coil of the contactor K is discharged through the first MOS transistor Q1 and the freewheeling diode D2, and because the capacitance of the energy storage capacitor C1 is generally smaller, the time of the discharging process is shorter, so that the contactor coil loses current rapidly, and the opening speed of the contactor K is further improved.
As shown in fig. 7, in one embodiment, the switch control unit includes a zener diode ZD;
The cathode of the zener diode ZD is respectively and electrically connected with the grid electrode of the first MOS tube Q1 and the power supply unit, and the anode of the zener diode ZD is grounded;
The voltage stabilizing diode ZD is used for stabilizing the grid voltage of the first MOS transistor Q1, so that the first MOS transistor Q1 is prevented from being damaged due to overlarge voltage;
In fig. 7, the resistor R10, the resistor R4, the resistor R5, and the resistor R6 are basic devices for realizing basic functions of the circuit, and are not described herein.
As shown in fig. 8, the power supply unit includes a first power supply unit, a second power supply unit, and a third power supply unit;
The first power supply unit comprises a pi-type filter circuit formed by a capacitor C5, an inductor L1 and a capacitor C6, and a rectifying filter circuit formed by a rectifying unit BR and a capacitor C7, and is used for providing a working voltage VCC1;
The second power supply unit comprises a resistor R11, a resistor R12, a triode Q3, a voltage stabilizing diode DZ1, a bidirectional TVS tube TVS5 and a capacitor C8, and is used for providing working voltage +12V;
The third power supply unit comprises a step-down voltage stabilizing chip LDO and a capacitor C9 and is used for providing working voltage +3.3V.
In a second aspect, in one embodiment, the present utility model provides a contactor system comprising a contactor coil, and a contactor control device according to any of the above embodiments.
Through the contactor system, the contactor coil control module and the PLC control module are packaged independently, and a corresponding first identification circuit and a corresponding second identification circuit are respectively arranged in the contactor coil control module and the PLC control module, wherein the first identification circuit is used for feeding back a first voltage signal to the first control circuit when the second identification circuit is not connected, and feeding back a second voltage signal to the first control circuit when the second identification circuit is electrically connected, so that the first control circuit determines whether the PLC control module is connected or not, and the control mode selected by a current user is further known; in addition, the selection switch can be omitted, the false triggering problem of the selection switch is avoided, and the reliability of the product is improved.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and the portions of one embodiment that are not described in detail in the foregoing embodiments may be referred to in the foregoing detailed description of other embodiments, which are not described herein again.
The above description of the contactor control device and the contactor system provided by the present utility model has been provided in detail, and specific examples are applied herein to illustrate the principles and embodiments of the present utility model, and the above examples are only used to help understand the method and core ideas of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
Claims (10)
1. A contactor control device, characterized in that the contactor control device comprises:
The contactor coil control module and the PLC control module; the contactor coil control module and the PLC control module are respectively packaged in a first packaging structure and a second packaging structure;
The contactor coil control module comprises a first control circuit and a first identification circuit, and the PLC control module comprises a second control circuit and a second identification circuit;
The second packaging structure can be used for being electrically connected with the first packaging structure, when the second packaging structure is electrically connected with the first packaging structure, the first input end of the first control circuit is electrically connected with the output end of the second control circuit, the second input end of the first control circuit is electrically connected with the output end of the first identification circuit, the input end of the first identification circuit is electrically connected with the second identification circuit, and the output end of the first control circuit is electrically connected with the contactor coil;
The first identification circuit is configured to feed back a first voltage signal to the first control circuit when the second identification circuit is not connected, and to feed back a second voltage signal to the first control circuit when the second identification circuit is electrically connected.
2. The contactor control according to claim 1, wherein the first identification circuit includes a first resistor and the second identification circuit includes a second resistor;
After the first identification circuit is electrically connected with the second identification circuit, the first resistor and the second resistor form a series voltage dividing resistor network, and a second input end of the first control circuit is electrically connected with the first resistor and the second resistor respectively;
One end, far away from the second resistor, of the first resistor is connected with working voltage, and one end, far away from the first resistor, of the second resistor is grounded; or one end, far away from the first resistor, of the second resistor is connected with working voltage, and one end, far away from the second resistor, of the first resistor is grounded.
3. The contactor control device of claim 2, wherein the first identification circuit further comprises a first bi-directional TVS tube;
The first anode of the first bidirectional TVS tube is electrically connected with the second input end of the first control circuit, and the second anode of the first bidirectional TVS tube is grounded.
4. The contactor control according to claim 1, wherein the contactor coil control module further comprises a first isolation drive circuit, and the PLC control module further comprises a second isolation drive circuit;
the output end of the first isolation driving circuit is electrically connected with the first input end of the first control circuit, and the input end of the second isolation driving circuit is electrically connected with the output end of the second control circuit; when the second packaging structure is electrically connected with the first packaging structure, the input end of the first isolation driving circuit is electrically connected with the output end of the second isolation driving circuit.
5. The contactor control according to claim 4, wherein the first isolation driving circuit includes a third resistor, and the second isolation driving circuit includes a photocoupler;
The first end of the third resistor is connected with working voltage, the second end of the third resistor is respectively and electrically connected with the first input end of the first control circuit and the collector electrode of the phototriode in the photoelectric coupler, the emitter electrode of the phototriode in the photoelectric coupler is grounded, and the light emitting diode in the photoelectric coupler is electrically connected with the output end of the second control circuit.
6. The contactor control device of claim 5, wherein the first isolation drive circuit comprises a second bi-directional TVS tube, and/or the second isolation drive circuit comprises a third bi-directional TVS tube;
A first anode of the second bidirectional TVS tube is electrically connected with a first input end of the first control circuit, and a second anode of the second bidirectional TVS tube is grounded;
The first anode of the third bidirectional TVS tube is electrically connected with the collector electrode of the phototriode in the photoelectric coupler, and the second anode of the third bidirectional TVS tube is grounded.
7. The contactor control device according to claim 1, wherein the first control circuit includes a power supply unit, a switch control unit, a driving unit, and a control unit;
The first input end of the control unit is electrically connected with the output end of the second control circuit, and the second input end of the control unit is electrically connected with the output end of the first identification circuit;
The power supply unit is electrically connected with the switch control unit, the driving unit, the control unit and the first identification circuit respectively and is used for providing working voltage;
The switch control unit is connected with the contactor coil in series and is used for controlling the power-on or power-off of the contactor coil according to the switch state;
the input end of the driving unit is electrically connected with the output end of the control unit, the output end of the driving unit is electrically connected with the switch control unit, and the driving unit is used for controlling the switch state of the switch control unit according to the driving signal output by the control unit.
8. The contactor control device of claim 7, wherein the switch control unit comprises a first MOS transistor, a second MOS transistor, a freewheel diode, and an energy storage capacitor;
The drain electrode of the first MOS tube is electrically connected with the first end of the contactor coil, the second end of the contactor coil is respectively and electrically connected with the cathode of the freewheel diode and the power supply unit, and the anode of the freewheel diode is respectively and electrically connected with the source electrode of the first MOS tube and the drain electrode of the second MOS tube;
the first end of the energy storage capacitor is respectively and electrically connected with the grid electrode of the first MOS tube and the power supply unit, and the second end of the energy storage capacitor is respectively and electrically connected with the source electrode of the first MOS tube and the drain electrode of the second MOS tube;
the source electrode of the second MOS tube is grounded, and the grid electrode of the second MOS tube is electrically connected with the output end of the driving unit.
9. The contactor control according to claim 8, wherein the switch control unit includes a zener diode;
And the cathode of the zener diode is electrically connected with the grid electrode of the first MOS tube and the power supply unit respectively, and the anode of the zener diode is grounded.
10. A contactor system comprising a contactor coil, characterized by further comprising a contactor control device according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322878617.0U CN221040963U (en) | 2023-10-25 | 2023-10-25 | Contactor control device and contactor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322878617.0U CN221040963U (en) | 2023-10-25 | 2023-10-25 | Contactor control device and contactor system |
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| Publication Number | Publication Date |
|---|---|
| CN221040963U true CN221040963U (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322878617.0U Active CN221040963U (en) | 2023-10-25 | 2023-10-25 | Contactor control device and contactor system |
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| Country | Link |
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| CN (1) | CN221040963U (en) |
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2023
- 2023-10-25 CN CN202322878617.0U patent/CN221040963U/en active Active
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