CN115799001A - Relay driving device - Google Patents
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- CN115799001A CN115799001A CN202211396926.8A CN202211396926A CN115799001A CN 115799001 A CN115799001 A CN 115799001A CN 202211396926 A CN202211396926 A CN 202211396926A CN 115799001 A CN115799001 A CN 115799001A
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Abstract
The application provides a relay drive arrangement, wherein, the device includes drive signal generation module, signal transmission module, voltage regulation module and drive signal output module, drive signal generation module's first output respectively with signal transmission module's first input the input of voltage regulation module is connected, drive signal output module's first input respectively with signal transmission module's output the output of voltage regulation module is connected, drive signal generation module's second output the second input of signal transmission module with drive signal output module's second input all is connected with the ground, drive signal output module's output and the relay coil of relay are connected. By adopting the device, the relay is prevented from being damaged.
Description
Technical Field
The invention relates to the field of driving circuits, in particular to a relay driving device.
Background
The relay is an electric control device, when the change of input quantity (excitation quantity) reaches the specified requirement, the controlled quantity is changed into a preset step change in an electric output circuit, when the relay is driven, the relay can be driven to be attracted only when the attraction voltage of the relay is reached; in the prior art, in order to ensure that the relay can work, the relay is continuously supplied with power by a power supply according to a voltage meeting a pull-in voltage value of the relay.
The inventor finds in research that, because the pull-in voltage of the relay is usually greater than the maintaining voltage (the voltage value required by the relay when the pull-in condition is reached is greater than the voltage value required by the relay after pull-in to maintain the pull-in state), when the relay is directly powered by the voltage which continuously passes through the power supply and meets the pull-in voltage value of the relay, namely, when the relay works with the voltage exceeding the maintaining voltage value after pull-in, the relay can be seriously heated, the aging of the relay is accelerated, and the relay is damaged.
Disclosure of Invention
In view of the above, the present invention provides a relay driving apparatus to prevent a relay from being damaged.
In a first aspect, an embodiment of the present application provides a relay driving device, where the device includes a driving signal generation module, a signal transmission module, a voltage regulation module, and a driving signal output module, a first output end of the driving signal generation module is connected to a first input end of the signal transmission module and an input end of the voltage regulation module, a first input end of the driving signal output module is connected to an output end of the signal transmission module and an output end of the voltage regulation module, a second output end of the driving signal generation module, a second input end of the signal transmission module, and a second input end of the driving signal output module are all connected to the ground, and an output end of the driving signal output module is connected to a relay coil of a relay;
when the signal transmission module is switched on, the driving signal generation module is used for transmitting the original driving signal generated by the driving signal generation module to the driving signal output module through the signal transmission module;
the driving signal output module is used for driving the relay according to an original driving voltage indicated by the original driving signal, wherein the original driving voltage meets the pull-in voltage of the relay;
when the signal transmission module is not conducted, the driving signal generation module is used for inputting the original driving signal to the voltage regulation module;
the voltage adjusting module is used for adjusting the original driving voltage to obtain a target driving voltage and transmitting a target driving signal containing the target driving voltage to the driving signal output module, wherein the target driving voltage meets the maintaining voltage of the relay;
and the driving signal output module is used for driving the relay according to the target driving voltage.
Optionally, the signal transmission module comprises a PMOS transistor, a first diode and a capacitor;
the source electrode of the PMOS tube is respectively connected with the first output end of the driving signal generation module and the cathode of the first diode, the drain electrode of the PMOS tube is respectively connected with the first input end of the driving signal output module and the anode of the first diode, the grid electrode of the PMOS tube is connected with the first end of the capacitor, and the second end of the capacitor is respectively connected with the second output end of the driving signal generation module, the second input end of the driving signal output module and the ground;
when the voltage at the two ends of the charged capacitor does not exceed the driving voltage of the PMOS tube, the PMOS tube is in a conducting state;
when the voltage at the two ends of the charged capacitor exceeds the driving voltage of the PMOS tube, the PMOS tube is in a non-conduction state;
after the driving signal generation module generates the original driving signal, the capacitor is used for charging the capacitor according to the original driving signal.
Optionally, the signal transmission module further includes a second diode and a first resistor, an anode of the second diode is connected to the gate of the PMOS transistor and the first end of the capacitor, a cathode of the second diode is connected to the first output end of the driving signal output module and the source of the PMOS transistor, and the first resistor is connected in parallel to the driving signal generation module;
and after the driving signal generation module sends a closing driving signal, the capacitor is used for discharging through the second diode and the first resistor.
Optionally, the signal transmission module further includes a second resistor, the second resistor is connected in parallel with the second diode, and the second resistor is configured to divide the voltage across the capacitor.
Optionally, the voltage adjusting module includes a third resistor, the third resistor is connected in parallel with the signal transmission module, and the third resistor is configured to divide the voltage across the relay coil by the driving signal output module.
Optionally, the device further includes an LED lamp indicating module, where the LED lamp indicating module includes an LED lamp and a fourth resistor, a positive electrode of the LED lamp is connected to the first input end of the driving signal output module, the output end of the voltage adjusting module, and the output end of the signal transmission module, respectively, a negative electrode of the LED lamp is connected to the first end of the fourth resistor, and a second end of the fourth resistor is connected to the second input end of the driving signal output module and the ground;
and the fourth resistor is used for dividing the voltage at two ends of the LED lamp so as to adjust the working voltage of the LED lamp.
Optionally, the signal transmission module further includes a first bidirectional transient diode, a first end of the first bidirectional transient diode is connected to the drain of the PMOS transistor and the first input end of the driving signal output module, respectively, and a second end of the first bidirectional transient diode is connected to the first end of the capacitor and the gate of the PMOS transistor, respectively.
Optionally, the voltage regulation module further comprises a second bi-directional transient diode connected in parallel with the third resistor.
Optionally, the LED lamp indication module further includes a third bidirectional transient diode, and the third bidirectional transient diode is connected in parallel with a branch where the LED lamp and the fourth resistor are located.
Optionally, the voltage adjustment module further includes a fifth resistor, where the fifth resistor is connected in parallel with the third resistor, and the fifth resistor is used for dividing the voltage across the relay coil with the third resistor.
The technical scheme provided by the application comprises but is not limited to the following beneficial effects:
the voltage regulation module used for regulating the circuit voltage and the signal transmission module used for controlling whether the voltage regulation module is started are arranged between the power supply (the driving signal generation module) and the relay coil (connected with the driving signal output module), and the voltage of the relay coil during working is regulated through the mutual matching of the signal transmission module and the voltage regulation module, so that the relay is prevented from being damaged.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram illustrating a relay driving apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second relay driving device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third relay driving device according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating a fourth relay driving device according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating a fifth relay driving device according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram illustrating a sixth relay driving device according to a first embodiment of the present invention;
fig. 7 is a schematic structural diagram of a seventh relay driving device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram illustrating an eighth relay driving apparatus according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a ninth relay driving device according to a first embodiment of the present invention;
fig. 10 is a schematic structural diagram of a tenth relay driving device according to a first embodiment of the present invention.
Description of reference numerals: 1-a drive signal generation module; 2-a signal transmission module; 3-a voltage regulation module; 4-a drive signal output module; 5-LED lamp indicating module; 21-PMOS tube; 22-a first diode; 23-a capacitor; 24-a second diode; 25-a first resistance; 26-a second resistance; 27-a first bidirectional transient diode; 31-a third resistance; 32-a second bidirectional transient diode; 33-fifth resistance; 51-LED lamps; 52-fourth resistance; 53-third bidirectional transient diode.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example one
For the convenience of understanding of the present application, the first embodiment of the present application will be described in detail below with reference to the content of the description of the schematic structural diagram of the relay driving device provided in the first embodiment of the present invention shown in fig. 1.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a relay driving device according to a first embodiment of the present invention, where the device includes a driving signal generating module 1, a signal transmission module 2, a voltage regulating module 3, and a driving signal output module 4, a first output end of the driving signal generating module 1 is connected to a first input end of the signal transmission module 2 and an input end of the voltage regulating module 3, a first input end of the driving signal output module 4 is connected to an output end of the signal transmission module 2 and an output end of the voltage regulating module 3, a second output end of the driving signal generating module 1, a second input end of the signal transmission module 2, and a second input end of the driving signal output module 4 are all connected to the ground, and an output end of the driving signal output module 4 is connected to a relay coil of the relay.
Specifically, the driving signal generation module is composed of an input terminal and a power supply, when the power supply is started, the power supply sends an original driving signal to the signal transmission module through the input terminal, and the original driving signal comprises information of an original driving voltage.
When the signal transmission module 2 is turned on, the driving signal generation module 1 is configured to transmit the original driving signal generated by the driving signal generation module to the driving signal output module 4 through the signal transmission module 2.
Specifically, the signal transmission module has two states, wherein the first state is a conducting state, and the second state is a non-conducting state; in a conducting state, the signal transmission module can be regarded as a wire with negligible resistance, and current can be transmitted through the signal transmission module (equivalent to a short-circuit state); after the driving signal generation module generates an original driving signal, the original driving signal is directly transmitted to the driving signal output module through the signal transmission module, namely the driving signal generation module is used for directly driving the relay through the driving signal output module.
The driving signal output module 4 is configured to drive the relay according to an original driving voltage indicated by the original driving signal, where the original driving voltage meets a pull-in voltage of the relay.
Specifically, the driving signal output module is composed of an output terminal, the output terminal is connected with a relay coil of the relay, and when the driving signal output module receives an original driving signal, the relay is driven by original driving voltage indicated by the original driving signal.
The pull-in voltage is the minimum voltage under the condition that the relay can pull in, and when the pull-in voltage is used for driving the relay, the relay can be just pulled in.
When the signal transmission module 2 is not turned on, the driving signal generation module 1 is configured to input the original driving signal to the voltage adjustment module 3.
Specifically, when the signal transmission module is in a non-conducting state, that is, the branch circuit of the circuit where the signal transmission module is located is an open circuit, the current cannot flow through the signal transmission module, so that the driving signal generation module inputs the original driving signal to the voltage regulation module.
The voltage adjusting module 3 is configured to adjust the original driving voltage to obtain a target driving voltage, and transmit a target driving signal including the target driving voltage to the driving signal output module 4, where the target driving voltage meets a sustain voltage of the relay.
Specifically, the voltage adjusting module can adjust the voltages at two ends of each component through voltage division, and transmit a target driving signal including the target driving voltage to the driving signal output module.
The maintaining voltage is the coil voltage of the relay maintaining contact attraction state after the relay contact attraction.
And the driving signal output module 4 is used for driving the relay according to the target driving voltage.
Specifically, when the driving signal output module receives the target driving signal and drives the relay with the target driving voltage (the sustain voltage), the relay can maintain the pull-in state.
In a possible embodiment, referring to fig. 2, fig. 2 shows a schematic structural diagram of a second relay driving device provided in an embodiment of the present invention, wherein the signal transmission module 2 includes a PMOS transistor 21, a first diode 22, and a capacitor 23;
the source electrode of the PMOS transistor 21 is connected to the first output terminal of the driving signal generating module 1 and the cathode of the first diode 22, the drain electrode of the PMOS transistor 21 is connected to the first input terminal of the driving signal outputting module 4 and the anode of the first diode 22, the gate electrode of the PMOS transistor 21 is connected to the first end of the capacitor 23, and the second end of the capacitor 23 is connected to the second output terminal of the driving signal generating module 1, the second input terminal of the driving signal outputting module 4 and the ground.
Specifically, a PMOS (Positive Channel Metal Oxide Semiconductor) refers to an n-type substrate, a p-Channel, and a MOS transistor that carries current by the flow of holes, and has three pins (poles), a gate (G pole), a drain (D pole), and a source (S pole), and when a control signal is applied between the gate and the source, the on/off between the drain and the source can be changed; the first diode is used for limiting the current flowing direction.
When the voltage across the charged capacitor 23 does not exceed the driving voltage of the PMOS transistor 21, the PMOS transistor 21 is in a conducting state.
When the voltage across the charged capacitor 23 exceeds the driving voltage of the PMOS transistor 21, the PMOS transistor 21 is in a non-conducting state.
Specifically, when the PMOS transistor is driven, the PMOS transistor is turned off and turned on when the voltage across the capacitor reaches the driving voltage of the PMOS transistor, and conversely, the PMOS transistor is turned on when the voltage across the capacitor does not reach the driving voltage of the PMOS transistor.
After the driving signal generating module 1 generates the original driving signal, the capacitor 23 is used for charging itself according to the original driving signal.
In a possible implementation, referring to fig. 3, fig. 3 shows a schematic structural diagram of a third relay driving device provided in an embodiment of the present invention, where the signal transmission module 2 further includes a second diode 24 and a first resistor 25, an anode of the second diode 24 is connected to the gate of the PMOS transistor 21 and the first end of the capacitor 23, a cathode of the second diode 24 is connected to the first output terminal of the driving signal output module 4 and the source of the PMOS transistor 21, and the first resistor 25 is connected in parallel to the driving signal generation module 1;
after the driving signal generating module 1 sends the closing driving signal, the capacitor 23 is used for discharging through the second diode 24 and the first resistor 25.
Specifically, after the driving signal generation module sends a closing driving signal, that is, after the driving signal generation module stops supplying power to the circuit, the capacitor discharges the first resistor through the second diode, and the driving signal output module stops driving the relay because the driving signal output module cannot receive the power supply.
In a possible implementation manner, referring to fig. 4, fig. 4 shows a schematic structural diagram of a fourth relay driving device provided in an embodiment of the present invention, wherein the signal transmission module 2 further includes a second resistor 26, the second resistor 26 is connected in parallel with the second diode 24, and the second resistor 26 is used for dividing the voltage across the capacitor 23.
The resistance of the second resistor may be set according to the capacity of the capacitor, the target storage capacity of the capacitor, and the charge and discharge time of the capacitance.
In a possible implementation manner, referring to fig. 5, fig. 5 shows a schematic structural diagram of a fifth relay driving device provided in an embodiment of the present invention, wherein the voltage regulating module 3 includes a third resistor 31, the third resistor 31 is connected in parallel with the signal transmission module 2, and the third resistor 31 is used for dividing the voltage across the relay coil by the driving signal output module 4.
Specifically, the voltage regulating module may further include a plurality of resistors connected in parallel or in series, and the plurality of resistors may be equivalent to one resistor, and are configured to divide the voltage across the relay coil to reduce the operating voltage of the relay coil.
In a possible implementation, referring to fig. 6, fig. 6 shows a schematic structural diagram of a sixth relay driving device provided in an embodiment of the present invention, where the device further includes an LED lamp indication module 5, the LED lamp indication module 5 includes an LED lamp 51 and a fourth resistor 52, an anode of the LED lamp 51 is connected to the first input end of the driving signal output module 4, the output end of the voltage adjustment module 3, and the output end of the signal transmission module 2, a cathode of the LED lamp 51 is connected to the first end of the fourth resistor 52, and a second end of the fourth resistor 52 is connected to the second input end of the driving signal output module 4 and the ground;
the fourth resistor 52 is used for dividing the voltage across the LED lamp 51 to adjust the operating voltage of the LED lamp 51.
Specifically, an LED (Light-Emitting Diode) lamp emits Light with different colors or different brightness under different operating voltages; generally, the higher the operating voltage is, the higher the brightness of the LED lamp is; when the working voltage is 0, the relay coil is closed, and the LED lamp is turned off.
In a possible implementation, referring to fig. 7, fig. 7 shows a schematic structural diagram of a seventh relay driving device according to an embodiment of the present invention, where the signal transmission module 2 further includes a first bi-directional transient diode 27, a first end of the first bi-directional transient diode 27 is respectively connected to the drain of the PMOS transistor 21 and the first input end of the driving signal output module 4, and a second end of the first bi-directional transient diode 27 is respectively connected to the first end of the capacitor 23 and the gate of the PMOS transistor 21.
In a possible embodiment, referring to fig. 8, fig. 8 shows a schematic structural diagram of an eighth relay driving device provided in an embodiment of the present invention, wherein the voltage regulation module 3 further includes a second bi-directional transient diode 32, and the second bi-directional transient diode 32 is connected in parallel with the third resistor 31.
In a possible implementation, referring to fig. 9, fig. 9 shows a schematic structural diagram of a ninth relay driving device provided in an embodiment of the present invention, wherein the LED lamp indication module 5 further includes a third bidirectional transient diode 53, and the third bidirectional transient diode 53 is connected in parallel with a branch where the LED lamp 51 and the fourth resistor 52 are located.
Specifically, the bi-directional transient diode is a high performance protection device in the form of a diode, and the first bi-directional transient diode, the second bi-directional transient diode and the third bi-directional transient diode are all used to protect the circuit and the relay coil.
In a possible implementation manner, referring to fig. 10, fig. 10 shows a schematic structural diagram of a tenth relay driving device according to an embodiment of the present invention, where the voltage regulating module further includes a fifth resistor 33, the fifth resistor 33 is connected in parallel with the third resistor 31, and the fifth resistor 33 is used for dividing the voltage across the relay coil with the third resistor 31.
Specifically, the specific number of resistors and the connection mode of the resistors in the circuit can be set according to actual requirements.
The relay driving device provided by the embodiment of the invention can be specific hardware on equipment or software or firmware installed on the equipment. The device provided by the embodiment of the present invention has the same implementation principle and the same technical effects as those of the foregoing method embodiments, and for the sake of brief description, reference may be made to corresponding contents in the foregoing method embodiments for the parts of the device embodiments that are not mentioned. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the foregoing systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments provided by the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the following descriptions are only illustrative and not restrictive, and that the scope of the present invention is not limited to the above embodiments: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention in its spirit and scope. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A relay driving device is characterized by comprising a driving signal generating module, a signal transmission module, a voltage regulating module and a driving signal output module, wherein a first output end of the driving signal generating module is respectively connected with a first input end of the signal transmission module and an input end of the voltage regulating module, a first input end of the driving signal output module is respectively connected with an output end of the signal transmission module and an output end of the voltage regulating module, a second output end of the driving signal generating module, a second input end of the signal transmission module and a second input end of the driving signal output module are all connected with the ground, and an output end of the driving signal output module is connected with a relay coil of a relay;
when the signal transmission module is switched on, the driving signal generation module is used for transmitting the original driving signal generated by the driving signal generation module to the driving signal output module through the signal transmission module;
the driving signal output module is used for driving the relay according to an original driving voltage indicated by the original driving signal, wherein the original driving voltage meets the pull-in voltage of the relay;
when the signal transmission module is not conducted, the driving signal generation module is used for inputting the original driving signal to the voltage regulation module;
the voltage adjusting module is used for adjusting the original driving voltage to obtain a target driving voltage and transmitting a target driving signal containing the target driving voltage to the driving signal output module, wherein the target driving voltage meets the maintaining voltage of the relay;
and the driving signal output module is used for driving the relay according to the target driving voltage.
2. The apparatus of claim 1, wherein the signal transmission module comprises a PMOS transistor, a first diode, and a capacitor;
the source electrode of the PMOS tube is respectively connected with the first output end of the driving signal generation module and the cathode of the first diode, the drain electrode of the PMOS tube is respectively connected with the first input end of the driving signal output module and the anode of the first diode, the grid electrode of the PMOS tube is connected with the first end of the capacitor, and the second end of the capacitor is respectively connected with the second output end of the driving signal generation module, the second input end of the driving signal output module and the ground;
when the voltage at the two ends of the charged capacitor does not exceed the driving voltage of the PMOS tube, the PMOS tube is in a conducting state;
when the voltage at the two ends of the charged capacitor exceeds the driving voltage of the PMOS tube, the PMOS tube is in a non-conduction state;
after the driving signal generation module generates the original driving signal, the capacitor is used for charging the capacitor according to the original driving signal.
3. The apparatus of claim 2, wherein the signal transmission module further comprises a second diode and a first resistor, an anode of the second diode is connected to the gate of the PMOS transistor and the first end of the capacitor, respectively, a cathode of the second diode is connected to the first output terminal of the driving signal output module and the source of the PMOS transistor, respectively, and the first resistor is connected in parallel to the driving signal generation module;
and after the driving signal generation module sends a closing driving signal, the capacitor is used for discharging through the second diode and the first resistor.
4. The apparatus of claim 3, wherein the signal transmission module further comprises a second resistor connected in parallel with the second diode, the second resistor configured to divide the voltage across the capacitor.
5. The apparatus of claim 1, wherein the voltage regulating module comprises a third resistor connected in parallel with the signal transmission module, and the third resistor is configured to divide the voltage across the relay coil by the driving signal output module.
6. The device of claim 1, further comprising an LED lamp indicating module, wherein the LED lamp indicating module comprises an LED lamp and a fourth resistor, an anode of the LED lamp is connected to the first input terminal of the driving signal output module, the output terminal of the voltage regulating module, and the output terminal of the signal transmission module, respectively, a cathode of the LED lamp is connected to a first terminal of the fourth resistor, and a second terminal of the fourth resistor is connected to the second input terminal of the driving signal output module and ground;
and the fourth resistor is used for dividing the voltage at two ends of the LED lamp so as to adjust the working voltage of the LED lamp.
7. The apparatus of claim 2, wherein the signal transmission module further comprises a first bi-directional transient diode, a first end of the first bi-directional transient diode is connected to the drain of the PMOS transistor and the first input end of the driving signal output module, and a second end of the first bi-directional transient diode is connected to the first end of the capacitor and the gate of the PMOS transistor.
8. The apparatus of claim 5, wherein the voltage regulation module further comprises a second bi-directional transient diode connected in parallel with the third resistor.
9. The apparatus of claim 6, wherein the LED light indication module further comprises a third bi-directional transient diode connected in parallel with a branch in which the LED light and a fourth resistor are located.
10. The apparatus of claim 5, wherein the voltage regulation module further comprises a fifth resistor connected in parallel with the third resistor, the fifth resistor configured to divide the voltage across the relay coil with the third resistor.
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| CN202211396926.8A CN115799001A (en) | 2022-11-09 | 2022-11-09 | Relay driving device |
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| CN202211396926.8A CN115799001A (en) | 2022-11-09 | 2022-11-09 | Relay driving device |
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| GB743524A (en) * | 1952-05-23 | 1956-01-18 | Philips Electrical Ind Ltd | Improvements in or relating to voltage regulating circuits |
| CN203278779U (en) * | 2013-05-14 | 2013-11-06 | 美的集团股份有限公司 | Drive circuit of switching element |
| CN106848998A (en) * | 2017-02-28 | 2017-06-13 | 浙江大华技术股份有限公司 | A kind of power output protection circuit and device |
| CN107134391A (en) * | 2017-06-07 | 2017-09-05 | 北京新能源汽车股份有限公司 | A kind of control relay circuit and automobile |
| CN109995007A (en) * | 2018-01-03 | 2019-07-09 | 中兴通讯股份有限公司 | The protection circuit of mobile device, mobile device |
| CN212751860U (en) * | 2020-08-31 | 2021-03-19 | 安徽江淮汽车集团股份有限公司 | Low-voltage protection control circuit and automobile |
| CN217546015U (en) * | 2022-06-06 | 2022-10-04 | 杭州萤石软件有限公司 | PMOS pipe fast switch's drive circuit, drive circuit base plate and robot of sweeping floor |
| CN217562478U (en) * | 2022-06-29 | 2022-10-11 | 深圳市德兰明海科技有限公司 | Relay drive circuit and energy storage power supply |
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