CN220440689U - Solid-state relay protection setting device - Google Patents
Solid-state relay protection setting device Download PDFInfo
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- CN220440689U CN220440689U CN202322154114.9U CN202322154114U CN220440689U CN 220440689 U CN220440689 U CN 220440689U CN 202322154114 U CN202322154114 U CN 202322154114U CN 220440689 U CN220440689 U CN 220440689U
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- 239000007787 solid Substances 0.000 claims abstract description 58
- 238000012545 processing Methods 0.000 claims abstract description 41
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- 238000005070 sampling Methods 0.000 claims description 13
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Abstract
The embodiment of the utility model discloses a solid-state relay protection setting device. The solid-state relay protection setting device comprises a setting module, a control module, a signal acquisition processing module and a switch module; the switch module is connected with the solid-state relay, the solid-state relay is connected with the signal acquisition processing module, the load and the load power supply in series, the switch module is used for controlling the solid-state relay to be connected or disconnected with a series loop between the signal acquisition processing module, the load and the load power supply according to the control signal, and the signal acquisition processing module is used for acquiring the load current of the load; the control module is respectively connected with the setting module, the signal acquisition processing module and the switch module, the setting module is used for sending a setting instruction to the control module, and the control module is used for setting fault current according to load current after receiving the setting instruction and generating a control signal according to the load current and the fault current. The solid state relay protection circuit can prevent the solid state relay from malfunctioning, and protect the solid state relay.
Description
Technical Field
The utility model relates to the technical field of solid-state relay protection, in particular to a solid-state relay protection setting device.
Background
The solid state relay is widely used in the electric heating field, and has the advantages of no contact, no arc, long service life and the like. However, the solid-state relay belongs to a control product, has no protection function, and can not be automatically cut off when the solid-state relay has faults such as overcurrent, short circuit, overtemperature and the like, so that the solid-state relay is finally damaged. In order to solve the above problems, a solid state relay is usually protected by a way of adding a fuse or a breaker, but the matching of the protection characteristics of the current of the solid state relay is difficult and the cost is high.
Disclosure of Invention
The utility model provides a solid-state relay protection setting device, which is used for protecting a solid-state relay.
The utility model provides a solid-state relay protection setting device, which comprises a setting module, a control module, a signal acquisition processing module and a switch module, wherein the setting module is used for setting the protection of a solid-state relay;
the switch module is connected with the solid-state relay, the solid-state relay is connected with the signal acquisition processing module, the load and the load power supply in series, the switch module is used for controlling the solid-state relay to be connected or disconnected with a series loop among the signal acquisition processing module, the load and the load power supply according to a control signal, and the signal acquisition processing module is used for acquiring the load current of the load;
the control module is respectively connected with the setting module, the signal acquisition processing module and the switch module, the setting module is used for sending a setting instruction to the control module, and the control module is used for setting fault current according to the load current after receiving the setting instruction and generating the control signal according to the load current and the fault current.
Optionally, the signal acquisition processing module comprises a current transformer, a power supply unit and a current signal conditioning unit;
the current transformer is connected with the solid-state relay, the load and a load power supply in series, and is used for generating induced current;
the current transformer is connected with the power supply unit, the power supply unit is respectively connected with the current signal conditioning unit and the control module, and the current signal conditioning unit is connected with the control module;
the power supply unit is used for acquiring electric energy and load sampling current according to the induced current, supplying power to the current signal conditioning unit and the control module, and sending the load sampling current to the current signal conditioning unit; the current signal conditioning unit is used for amplifying the load sampling current to obtain the load current.
Optionally, the setting module comprises a key switch and a first pull-down resistor;
the first end of the key switch is connected with a first fixed potential, the first end of the first pull-down resistor is grounded, and the second end of the key switch and the second end of the first pull-down resistor are both connected with the control module.
Optionally, the switch module includes a first control switch, a second control switch, and a third control switch;
the control end of the first control switch is connected with the control module, the first end of the first control switch is connected with the control end of the second control switch, the first end of the second control switch and the first end of the third control switch are connected with the positive electrode of the direct current power supply, the second end of the second control switch is connected with the control end of the third control switch, the second end of the third control switch is connected with the first input end of the solid state relay, and the second end of the first control switch, the third end of the third control switch and the second input end of the solid state relay are grounded together.
Optionally, the first control switch includes a first current limiting resistor, a second pull-down resistor, and a first transistor;
the first end of the first current limiting resistor is used as a control end of the first control switch, the second end of the first current limiting resistor is connected with the first end of the second pull-down resistor and the control end of the first transistor, the first pole of the first transistor is used as the first end of the first control switch, and the second end of the second pull-down resistor is connected with the second pole of the first transistor and is used as the second end of the first control switch;
the second control switch comprises a first pull-up resistor, a second current limiting resistor and a second transistor;
the first end of the second current limiting resistor is used as a control end of the second control switch, and the second end of the second current limiting resistor and the control end of the second transistor are connected with the first end of the first pull-up resistor; a second end of the first pull-up resistor is connected with a first pole of the second transistor and is used as a first end of the second control switch; a second pole of the second transistor is used as a second end of the second control switch;
the third control switch comprises a third pull-down resistor and a third transistor;
the first end of the third pull-down resistor is used as a third end of the third control switch, the second end of the third pull-down resistor is connected with the control end of the third transistor and is used as the control end of the third control switch, the first pole of the third transistor is used as the first end of the third control switch, and the second pole of the third transistor is used as the second end of the third control switch.
Optionally, the power supply unit comprises a rectifier bridge, a voltage stabilizing tube and a current collecting resistor;
the first end of rectifier bridge with the second end of rectifier bridge all with current transformer is connected, the third end of rectifier bridge with the first end of electric current collection resistance all with current signal conditioning unit is connected, the fourth end of rectifier bridge with the first end of steady voltage tube all is connected with the second fixed potential, the second end of steady voltage tube with the second end of electric current collection resistance all with current signal conditioning unit is connected.
Optionally, the current signal conditioning unit comprises an inverting differential amplifier;
the input end of the reverse differential amplifier is connected with the power supply unit, and the output end of the reverse differential amplifier is connected with the control module.
Optionally, the solid state relay protection setting device further comprises a display module;
the display module comprises a first light emitting diode, a second light emitting diode, a third current limiting resistor and a fourth current limiting resistor;
the first end of the first light emitting diode is connected with the control module, the second end of the first light emitting diode is connected with the first end of the third current limiting resistor, the first end of the second light emitting diode is connected with the control module, the second end of the second light emitting diode is connected with the first end of the fourth current limiting resistor, and the second end of the third current limiting resistor and the second end of the fourth current limiting resistor are connected with a third fixed potential.
Optionally, the solid state relay protection setting device further comprises a communication module;
the communication module comprises a serial data transmission interface.
Optionally, the solid state relay protection setting device further comprises a power module;
the power module is connected with the control module and is used for supplying power to the control module.
Optionally, the control module includes a single-chip microcontroller of model STM8S003F3P6 TR.
The setting module enables the control module to set the maximum current which can be born by the solid-state relay under the condition of a certain load, namely fault current, so that the control module can control the switch module to control the on-off state of the solid-state relay according to the actual load current and the fault current, thereby preventing the solid-state relay from generating faults such as overcurrent, short circuit, overtemperature and the like, and realizing the protection of the solid-state relay.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a solid-state relay protection setting device according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of another solid-state relay protection setting device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a signal acquisition processing module according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of another signal acquisition processing module according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a setting module according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of a switch module according to an embodiment of the present utility model;
fig. 7 is a schematic structural diagram of another switch module according to an embodiment of the present utility model;
fig. 8 is a schematic structural diagram of another solid-state relay protection setting device according to an embodiment of the present utility model;
fig. 9 is a schematic structural diagram of a display module according to an embodiment of the utility model.
In the figure, a 110-setting module, a 120-control module, a 130-signal acquisition processing module, a 131-current transformer, a 132-power supply unit, a 133-current signal conditioning unit, a 1331-reverse differential amplifier, a 140-switching module, a 141-first control switch, a 142-second control unit, a 143-third control unit, a 150-display module, a 160-communication module, a 170-power supply module, a 210-solid state relay, a 220-load and a 230-load power supply.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the utility model provides a solid-state relay protection setting device, fig. 1 is a schematic structural diagram of the solid-state relay protection setting device provided by the embodiment of the utility model, as shown in fig. 1, the solid-state relay protection setting device comprises a setting module 110, a control module 120, a signal acquisition processing module 130 and a switch module 140; the switch module 140 is connected with the solid state relay 210, the solid state relay 210 is connected in series with the signal acquisition processing module 130, the load 220 and the load power supply 230, the switch module 140 is used for controlling the solid state relay 210 to be connected or disconnected with a series loop among the signal acquisition processing module 130, the load 220 and the load power supply 230 according to a control signal, and the signal acquisition processing module 130 is used for acquiring the load current of the load 220; the control module 120 is respectively connected to the setting module 110, the signal acquisition processing module 130, and the switch module 140, where the setting module 110 is configured to send a setting instruction to the control module 120, and the control module 120 is configured to set a fault current according to the load current after receiving the setting instruction, and generate a control signal according to the load current and the fault current.
The setting module 110 may enable the control module 120 to record the load current of the load 220, and enable the control module 120 to analyze the load current of the load 220 to set the maximum current that the solid state relay 210 can withstand when the load 220 is fixed, i.e. the fault current. The signal acquisition processing module 130 is connected in series with the load 220, and the signal acquisition processing module can acquire the load current of the load 220 (the rated current flowing through the load 220 at the rated voltage) because the currents in the series loop are equal everywhere. The switch module 140 may control the conductive state of the solid state relay 210, thereby controlling the conductive state of the series loop of the solid state relay 210 and the signal acquisition processing module 130, the load 220, and the load power supply 230. The control module 120 is a control center of the whole solid state relay protection setting device, and can obtain load current, set fault current of the solid state relay 210 under a certain condition of the load 220, and control the switch module 140 to control the opening and closing state of the solid state relay 210 according to the load current and the fault current.
According to the connection relation of each module of the solid-state relay protection setting device, the working principle of the solid-state relay protection setting device is as follows: the setting module 110 sends a setting instruction to the control module 120, the control module 120 firstly obtains a load current according to the setting instruction, then processes the load current to obtain a fault current (for example, multiplies a load current signal by a predetermined protection coefficient to obtain the fault current), and finally generates a control signal according to the load current and the fault current. The switch module 140 may control the conductive state of the solid state relay 210 according to the control signal, so as to control the conductive state of the series loop between the solid state relay 210 and the signal acquisition and processing module 130, the load 220, and the load power supply 230, thereby implementing protection of the solid state relay 210.
When the load current is smaller than the fault current, and the load current is within the sustainable range of the solid-state relay 210, the control module 120 generates a first control signal, and the switch module 140 controls the solid-state relay 210 to keep on according to the first control signal, that is, keep the series circuit between the solid-state relay 210 and the signal acquisition processing module 130, the load 220, and the load power supply 230 on. When the load current is greater than or equal to the fault current, the load current solid state relay 210 is not able to bear the fault current, the control module 120 generates a second control signal, and the switch module 140 controls the solid state relay 210 to be turned off according to the second control signal, even if the series circuit between the solid state relay 210 and the signal acquisition processing module 130, the load 220 and the load power supply 230 is not conductive.
According to the solid-state relay protection setting device provided by the embodiment of the utility model, the setting module 110 enables the control module 120 to set the maximum current which can be borne by the solid-state relay 210 under the condition of a certain load 220, namely fault current, so that the control module 120 can control the switching state of the solid-state relay 210 according to the actual load current and the fault current to prevent the solid-state relay 210 from generating faults such as overcurrent, short circuit, overtemperature and the like, and the protection of the solid-state relay 210 is realized.
Fig. 2 is a schematic structural diagram of another solid state relay protection setting device according to an embodiment of the present utility model, as shown in fig. 2, the signal acquisition processing module 130 includes a current transformer 131, a power supply unit 132, and a current signal conditioning unit 133; the current transformer 131 is connected in series with the solid state relay 210, the load 220 and the load power supply 230, and the current transformer 131 is used for generating an induced current; the current transformer 131 is connected with the power supply unit 132, the power supply unit 132 is respectively connected with the current signal conditioning unit 133 and the control module 120, and the current signal conditioning unit 133 is connected with the control module 120; the power supply unit 132 is configured to obtain electric energy and load sampling current according to the induced current, supply power to the current signal conditioning unit 133 and the control module 120, and send the load sampling current to the current signal conditioning unit 133; the current signal conditioning unit 133 is configured to amplify the load sampling current to obtain a load current.
The current transformer 131 may generate an induced current through a current flowing through the load 220 (a rated current of the load 220), and the power unit 132 rectifies the induced current after flowing into the induced current, so as to stably supply power to the current signal conditioning unit 133 and the control module 120. The power supply unit 132 also collects the rectified current to obtain a load sampling current. The current signal conditioning unit 133 may amplify the load sampling current to obtain a load current.
Fig. 3 is a schematic structural diagram of a signal acquisition processing module 130 according to an embodiment of the present utility model, and as shown in fig. 3, a power unit 132 includes a rectifier bridge P1, a voltage regulator Dt, and a current collecting resistor Rt; the current signal conditioning unit 133 includes an inverse differential amplifier 1331;
the first end of the rectifier bridge P1 and the second end of the rectifier bridge P1 are connected with the current transformer 131, the third end of the rectifier bridge P1 and the first end of the current collection resistor Rt are connected with the current signal conditioning unit 133, the fourth end of the rectifier bridge P1 and the first end of the voltage stabilizing tube Dt are connected with the second fixed potential 02, and the second end of the voltage stabilizing tube Dt and the second end of the current collection resistor Rt are connected with the current signal conditioning unit 133. An input terminal of the reverse differential amplifier 1331 is connected to the power supply unit 132, and an output terminal of the reverse differential amplifier 1331 is connected to the control module 120.
The rectifier bridge P1 may rectify the input induced current, and the voltage regulator Dt may regulate the voltage output by the rectifier bridge P1, so as to provide stable electric energy to the current signal conditioning unit 133 and the control module 120. The reverse differential amplifier 1331 may obtain the voltage across the current collecting resistor Rt, and since the resistance value of the current collecting resistor Rt is known, the reverse differential amplifier 1331 may obtain the load sampling current, and amplify the load sampling current to obtain the load current.
Fig. 4 is a schematic structural diagram of another signal acquisition processing module according to an embodiment of the present utility model, and a specific circuit of an inverse differential amplifier 1331 is shown in fig. 4 by way of example, which is not limited herein.
Fig. 5 is a schematic structural diagram of a setting module according to an embodiment of the present utility model, and as shown in fig. 5, the setting module 110 includes a key switch K1 and a first pull-down resistor R11; the first end of the key switch K1 is connected to the first fixed potential 01, the first end of the first pull-down resistor R11 is grounded, and the second end of the key switch K1 and the second end of the first pull-down resistor R11 are both connected to the control module 120.
Specifically, if the fault current of the solid-state relay 210 needs to be set, only the key switch K1 needs to be triggered, and the key switch K1 is turned on, so that the high level output by the first fixed potential 01 is sent to the control module 120, so that the control module 120 performs the process of setting the fault current of the solid-state relay 210. If the fault current of the solid state relay 210 is not required to be set, the key switch K1 is not required to be triggered, the key switch K1 is not turned on, the first pull-down resistor R11 sends a low potential to the control module 120, and the control module 120 does not execute the process of setting the fault current of the solid state relay 210. Wherein the first fixed potential 01 may be a +5v voltage.
Fig. 6 is a schematic structural diagram of a switch module according to an embodiment of the present utility model, and as shown in fig. 6, the switch module 140 includes a first control switch 141, a second control switch 142 and a third control switch 143; the control end of the first control switch 141 is connected with the control module 120, the first end of the first control switch 141 is connected with the control end of the second control switch 142, the first end of the second control switch 142 and the first end of the third control switch 143 are both connected with the positive pole of the direct current power supply DC, the second end of the second control switch 142 and the control end of the third control switch 143 are connected, the second end of the third control switch 143 is connected with the first input end of the solid state relay 210, and the second end of the first control switch 141, the third end of the third control switch 143 and the second input end of the solid state relay 210 are grounded in common.
Specifically, when the control module 120 controls the first control switch 141 to be turned on, the first control switch 141 controls the second control switch 142 to be turned on, and the second control switch 142 controls the third control switch 143 to be turned off, so as to power off the solid state relay 210, and disconnect the serial circuit between the solid state relay 210 and the signal acquisition processing module 130, the load 220, and the load power supply 230. When the control module 120 controls the first control switch 141 to be turned off, the first control switch 141 controls the second control switch 142 to be turned off, and the second control switch 142 controls the third control switch 143 to be turned on, so as to power up the solid state relay 210, and conduct the serial loop between the solid state relay 210 and the signal acquisition processing module 130, the load 220, and the load power supply 230.
As shown in fig. 7, the first control switch 141 includes a first current limiting resistor R21, a second pull-down resistor R12, and a first transistor T1; the second control switch 142 includes a first pull-up resistor R31, a second current limiting resistor R22, and a second transistor T2; the third control switch 143 includes a third pull-down resistor R13 and a third transistor T3;
the first end of the first current limiting resistor R21 is used as a control end of the first control switch 141, the second end of the first current limiting resistor R21 is connected with the first end of the second pull-down resistor R12 and the control end of the first transistor T1, the first pole of the first transistor T1 is used as the first end of the first control switch 141, and the second end of the second pull-down resistor R12 is connected with the second pole of the first transistor T1 and is used as the second end of the first control switch 141;
the first end of the second current limiting resistor R22 is used as the control end of the second control switch 142, and the second end of the second current limiting resistor R22 and the control end of the second transistor T2 are both connected with the first end of the first pull-up resistor R31; a second terminal of the first pull-up resistor R31 is connected to the first pole of the second transistor T2 and serves as a first terminal of the second control switch 142; the second pole of the second transistor T2 serves as a second terminal of the second control switch 142;
the first terminal of the third pull-down resistor R13 is used as the third terminal of the third control switch 143, the second terminal of the third pull-down resistor R13 is connected to the control terminal of the third transistor T3 and is used as the control terminal of the third control switch 143, the first pole of the third transistor T3 is used as the first terminal of the third control switch 143, and the second pole of the third transistor T3 is used as the second terminal of the third control switch 143.
The first current limiting resistor R21 may limit the magnitude of the current flowing into the first transistor T1, so as to prevent the first transistor T1 from being burned due to excessive current. The second pull-down resistor R12 may pull the control terminal potential of the first transistor T1 low when the control terminal of the first transistor T1 is not input. The second current limiting resistor R22 can limit the current flowing into the second transistor T2, so as to prevent the second transistor T2 from being burned out due to excessive current. The first pull-up resistor R31 may pull up the control terminal potential of the second transistor T2 when the control terminal of the second transistor T2 is not input. The third pull-down resistor R13 may limit the magnitude of the current flowing into the third transistor T3 to prevent the third transistor T3 from being burned out due to excessive current.
The first transistor T1 includes an N-type metal-oxide-semiconductor field effect transistor, and the second transistor T2 and the third transistor T3 each include a P-type metal-oxide-semiconductor field effect transistor.
Specifically, when the control module 120 outputs a high potential to the control terminal of the first transistor T1, the first transistor T1 is turned on, and at this time, the first pole and the second pole of the first transistor T1 are turned on, so that the potential of the control terminal of the second transistor T2 is reduced. At this time, the second transistor T2 is turned on, and the first pole and the second pole of the second transistor T2 are turned on, so that the high potential of the positive electrode of the direct current power source DC can be output to the control terminal of the second transistor T2, so that the third transistor T3 is turned off, that is, the first pole and the second pole of the third transistor T3 are not turned on.
When the control module 120 outputs a low voltage to the control terminal of the first transistor T1, the first transistor T1 is turned off, i.e., the first and second poles of the first transistor T1 are not turned on. At this time, the control terminal potential of the second transistor T2 is pulled up by the first pull-up resistor R31, so that the second transistor T2 is turned off, i.e., the first and second poles of the second transistor T2 are not turned on. At this time, the control terminal potential of the third transistor T3 is pulled down by the third pull-down resistor R13, so that the third transistor T3 is turned on, i.e., the first and second poles of the third transistor are turned on.
Fig. 8 is a schematic structural diagram of another solid-state relay protection setting device according to an embodiment of the present utility model, and fig. 9 is a schematic structural diagram of a display module according to an embodiment of the present utility model, where the solid-state relay protection setting device shown in fig. 8 and 9 further includes a display module 150; the display module 150 includes a first light emitting diode D1, a second light emitting diode D2, a third current limiting resistor R23, and a fourth current limiting resistor R24;
specifically, a first end of the first light emitting diode D1 is connected to the control module 120, a second end of the first light emitting diode D1 is connected to a first end of the third current limiting resistor R23, a first end of the second light emitting diode D2 is connected to the control module 120, a second end of the second light emitting diode D2 is connected to a first end of the fourth current limiting resistor R24, and a second end of the third current limiting resistor R23 and a second end of the fourth current limiting resistor R24 are both connected to the third fixed potential 03.
Illustratively, when the control module 120 monitors that the load current is less than the preset current, the first light emitting diode D1 is on and the second light emitting diode D2 is off; when the control module 120 monitors that the preset current is less than or equal to the load current and less than the fault current, the first light emitting diode D1 is turned off, and the second light emitting diode D2 is turned on; when the control module 120 monitors that the load current is greater than or equal to the fault current, the control module 120 controls the switch module 140 to power down the solid state relay 210, so that the serial circuit between the solid state relay 210 and the signal acquisition processing module 130, the load 220 and the load power supply 230 is broken, and further the signal acquisition processing module 130 cannot supply power to the control module 120, the solid state relay 210 protects the setting device to stop running, and at the moment, the first light emitting diode D1 and the second light emitting diode D2 are all turned off. The preset current is a preset current value, and if the load current is smaller than the preset current, the load current is within the sustainable range of the solid state relay 210. If the preset current is smaller than or equal to the load current and smaller than the fault current, the load current is close to the fault current, and the attention of a warning technician is needed.
It should be noted that: the foregoing exemplary embodiment illustrates an indication manner of the indication module, which is not limited herein, and a designer may set the indication manner according to actual requirements.
With continued reference to fig. 8, based on the above embodiment, the solid state relay protection setting device further includes a communication module 160; the communication module 160 includes a serial data transmission interface.
The communication unit is a window for performing information interaction between the solid-state relay protection setting device and the external device, that is, the communication unit may transmit information such as an operation state of the solid-state relay 210 and an operation current of the load 220 to the corresponding communication device, and may also receive an external operation instruction.
It should be noted that the communication module 160 may be a serial data transmission interface, which is not limited herein, and a designer may select a suitable communication interface or communication device according to actual requirements.
With continued reference to fig. 8, based on the above-described embodiments, the solid state relay protection setting device further includes a power module 170; the power module 170 is connected with the control module 120, and the power module 170 is used for supplying power to the control module 120; the control module 120 includes a single-chip microcontroller model STM8S003F3P6 TR.
The control module 120 is connected to the power module 170, so that when the control module 120 controls the switch module 140 to power down the solid state relay 210, and a serial loop between the solid state relay 210 and the signal acquisition processing module 130, the load 220 and the load power supply 230 is broken, and the signal acquisition processing module 130 cannot power up the control module 120, the power module 170 can power up the control module 120, and at this time, the control module 120 can display the operation state of the solid state relay 210 through the display module 150, and at the same time, can transmit information such as the operation state of the solid state relay 210 to a corresponding communication device through the communication module 160.
The control module 120 includes a single-chip microcontroller with a model number of STM8S003F3P6TR, and has the advantages of high control accuracy, small volume, fast processing speed, low cost, etc., so that the overall manufacturing cost of the solid-state relay protection setting device can be reduced, the control accuracy of the solid-state relay protection setting device can be improved, and further effective protection of the solid-state relay 210 can be realized.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. The solid-state relay protection setting device is characterized by comprising a setting module, a control module, a signal acquisition processing module and a switch module;
the switch module is connected with the solid-state relay, the solid-state relay is connected with the signal acquisition processing module, the load and the load power supply in series, the switch module is used for controlling the solid-state relay to be connected or disconnected with a series loop among the signal acquisition processing module, the load and the load power supply according to a control signal, and the signal acquisition processing module is used for acquiring the load current of the load;
the control module is respectively connected with the setting module, the signal acquisition processing module and the switch module, the setting module is used for sending a setting instruction to the control module, and the control module is used for setting fault current according to the load current after receiving the setting instruction and generating the control signal according to the load current and the fault current.
2. The solid state relay protection setting device according to claim 1, wherein the signal acquisition processing module comprises a current transformer, a power supply unit and a current signal conditioning unit;
the current transformer is connected with the solid-state relay, the load and a load power supply in series, and is used for generating induced current;
the current transformer is connected with the power supply unit, the power supply unit is respectively connected with the current signal conditioning unit and the control module, and the current signal conditioning unit is connected with the control module;
the power supply unit is used for acquiring electric energy and load sampling current according to the induced current, supplying power to the current signal conditioning unit and the control module, and sending the load sampling current to the current signal conditioning unit; the current signal conditioning unit is used for amplifying the load sampling current to obtain the load current.
3. The solid state relay protection setting device of claim 1, wherein the setting module comprises a key switch and a first pull-down resistor;
the first end of the key switch is connected with a first fixed potential, the first end of the first pull-down resistor is grounded, and the second end of the key switch and the second end of the first pull-down resistor are both connected with the control module.
4. The solid state relay protection setting device of claim 1, wherein the switch module comprises a first control switch, a second control switch, and a third control switch;
the control end of the first control switch is connected with the control module, the first end of the first control switch is connected with the control end of the second control switch, the first end of the second control switch and the first end of the third control switch are connected with the positive electrode of the direct current power supply, the second end of the second control switch is connected with the control end of the third control switch, the second end of the third control switch is connected with the first input end of the solid state relay, and the second end of the first control switch, the third end of the third control switch and the second input end of the solid state relay are grounded together.
5. The solid state relay protection setting device of claim 4, wherein the first control switch comprises a first current limiting resistor, a second pull-down resistor, and a first transistor;
the first end of the first current limiting resistor is used as a control end of the first control switch, the second end of the first current limiting resistor is connected with the first end of the second pull-down resistor and the control end of the first transistor, the first pole of the first transistor is used as the first end of the first control switch, and the second end of the second pull-down resistor is connected with the second pole of the first transistor and is used as the second end of the first control switch;
the second control switch comprises a first pull-up resistor, a second current limiting resistor and a second transistor;
the first end of the second current limiting resistor is used as a control end of the second control switch, and the second end of the second current limiting resistor and the control end of the second transistor are connected with the first end of the first pull-up resistor; a second end of the first pull-up resistor is connected with a first pole of the second transistor and is used as a first end of the second control switch; a second pole of the second transistor is used as a second end of the second control switch;
the third control switch comprises a third pull-down resistor and a third transistor;
the first end of the third pull-down resistor is used as a third end of the third control switch, the second end of the third pull-down resistor is connected with the control end of the third transistor and is used as the control end of the third control switch, the first pole of the third transistor is used as the first end of the third control switch, and the second pole of the third transistor is used as the second end of the third control switch.
6. The solid state relay protection setting device according to claim 2, wherein the power supply unit includes a rectifier bridge, a regulator tube, and a current collection resistor;
the first end of rectifier bridge with the second end of rectifier bridge all with current transformer is connected, the third end of rectifier bridge with the first end of electric current collection resistance all with current signal conditioning unit is connected, the fourth end of rectifier bridge with the first end of steady voltage tube all is connected with the second fixed potential, the second end of steady voltage tube with the second end of electric current collection resistance all with current signal conditioning unit is connected.
7. The solid state relay protection setting device of claim 2, wherein the current signal conditioning unit comprises an inverse differential amplifier;
the input end of the reverse differential amplifier is connected with the power supply unit, and the output end of the reverse differential amplifier is connected with the control module.
8. The solid state relay protection setting device of claim 1, further comprising a display module;
the display module comprises a first light emitting diode, a second light emitting diode, a third current limiting resistor and a fourth current limiting resistor;
the first end of the first light emitting diode is connected with the control module, the second end of the first light emitting diode is connected with the first end of the third current limiting resistor, the first end of the second light emitting diode is connected with the control module, the second end of the second light emitting diode is connected with the first end of the fourth current limiting resistor, and the second end of the third current limiting resistor and the second end of the fourth current limiting resistor are connected with a third fixed potential.
9. The solid state relay protection setting device of claim 1, further comprising a communication module;
the communication module comprises a serial data transmission interface.
10. The solid state relay protection setting device according to any one of claims 1 to 9, further comprising a power supply module;
the power supply module is connected with the control module and is used for supplying power to the control module;
the control module comprises a single-chip microcontroller with the model STM8S003F3P6 TR.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322154114.9U CN220440689U (en) | 2023-08-10 | 2023-08-10 | Solid-state relay protection setting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322154114.9U CN220440689U (en) | 2023-08-10 | 2023-08-10 | Solid-state relay protection setting device |
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| CN220440689U true CN220440689U (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322154114.9U Active CN220440689U (en) | 2023-08-10 | 2023-08-10 | Solid-state relay protection setting device |
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| CN (1) | CN220440689U (en) |
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