Relay and relay device

Abstract

The utility model discloses a relay and a relay device, and relates to the technical field of electric switches. In the relay, the input end of a contact switch circuit is connected with the input end of a contactless switch circuit, and a connection point is used as the input end of the relay; the output end of the contact switch circuit is connected with the output end of the contactless switch circuit, and the connection point is used as the output end of the relay; the contact switch circuit and the contactless switch circuit are both controlled by the controller. As the contact switch circuit is controlled to be switched on and off when the contactless switch circuit is in the conduction state, the contactless switch circuit is in the conduction state when the contact switch circuit is switched on or switched off, and the voltage drop between the two ends of the contact switch circuit is very small when the contact switch circuit is switched on or switched off. Therefore, the possibility of arc generation of the contact switch circuit is reduced, namely the possibility of contact carbonization is reduced, and the service life of the relay is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric switches, in particular to a relay and a relay device. Background Art

[0002] Currently, the degree of industrial intelligence and automation is getting higher and higher, and at the same time, the demand for and usage of relays are also increasing. At present, contact relays are commonly used in the industry.

[0003] However, contact relays will reduce the service life of the relay. When the contact relay switches its own state, an arc is generated between its contacts, which will cause the contacts to carbonize, thus greatly reducing the service life of the relay.

[0004] Therefore, how to extend the service life of the relay is a technical problem to be solved urgently. Summary of the Utility Model

[0005] In view of this, the utility model provides a relay and a relay device to extend the service life of the relay.

[0006] To achieve the above object, the embodiments of the utility model provide the following technical solutions:

[0007] On the one hand, this application provides a relay, including: a controller, a contact switch circuit, and a non-contact switch circuit; where:

[0008] The input end of the contact switch circuit is connected to the input end of the non-contact switch circuit, and the connection point is used as the input end of the relay;

[0009] The output end of the contact switch circuit is connected to the output end of the non-contact switch circuit, and the connection point is used as the output end of the relay;

[0010] Both the contact switch circuit and the non-contact switch circuit are controlled by the controller;

[0011] The contact switch circuit is controlled to be turned on and off when the non-contact switch circuit is in the on state.

[0012] Optionally, the non-contact switch circuit is controlled to be turned off when the contact switch circuit is in the on state.

[0013] Optionally, both the non-contact switch circuit and the contact switch circuit include: a switch and a transformer; where:

[0014] The switch is controlled by the controller;

[0015] The input terminal of the switch serves as the input terminal of the corresponding switch circuit. The output terminal of the switch is connected to one end of the primary winding of the transformer, and the other end of the primary winding is grounded;

[0016] One end of the secondary winding of the transformer serves as the output terminal of the corresponding switch circuit, and the other end of the secondary winding is grounded;

[0017] In the contactless switch circuit, the switch is a contactless switch; in the contact switch circuit, the switch is a contact switch.

[0018] Optionally, both the contactless switch circuit and the contact switch circuit further include: a current detection circuit; wherein:

[0019] The detection object of the current detection circuit is the switch;

[0020] The output terminal of the current detection circuit is connected to the feedback terminal of the controller.

[0021] Optionally, the current detection circuit includes: an auxiliary winding, a rectifier circuit, and a voltage stabilizing circuit; wherein:

[0022] The auxiliary winding is wound on the iron core of the transformer;

[0023] Both ends of the auxiliary winding are respectively connected to both ends of the AC side of the rectifier circuit;

[0024] The DC side of the rectifier circuit is connected to the input side of the voltage stabilizing circuit, and the output terminal of the voltage stabilizing circuit is connected to the feedback terminal of the controller.

[0025] Optionally, the contactless switch is a controllable switch tube made of a wide-bandgap semiconductor material.

[0026] Optionally, the contact switch includes: a contact and a pressing device; wherein:

[0027] One end of the contact serves as the input terminal of the switch, and the other end of the contact serves as the output terminal of the switch;

[0028] The contact includes an automatic telescopic locking mechanism and a pin mechanism;

[0029] The pressing device is controlled by the controller.

[0030] Optionally, the pressing device includes: a motor and its motor driver.

[0031] On the other hand, this application provides a relay device, including: at least one relay as described in any one of the previous aspects of this application.

[0032] Optionally, if the number of the relays is greater than 1, the controllers in all the relays can be combined into one.

[0033] As can be seen from the above technical solution, the present invention provides a relay. In this relay, the input end of the contact switch circuit is connected to the input end of the non-contact switch circuit, and the connection point serves as the input end of the relay; the output end of the contact switch circuit is connected to the output end of the non-contact switch circuit, and the connection point serves as the output end of the relay; both the contact switch circuit and the non-contact switch circuit are controlled by a controller. Since the contact switch circuit is controlled to be turned on and off when the non-contact switch circuit is in the on state, when the contact switch circuit is turned on or off, the non-contact switch circuit is already in the on state. Therefore, when the contact switch circuit is turned on or off, the voltage drop between the two ends of the contact switch circuit is very small, thereby reducing the possibility of the contact switch circuit generating an arc, that is, reducing the possibility of contact carbonization, and further extending the service life of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0035] Figure 1 It is a schematic structural diagram of an embodiment of the relay provided by the embodiment of the present application;

[0036] Figure 2 It is a schematic structural diagram of another embodiment of the relay provided by the embodiment of the present application;

[0037] Figure 3 It is a schematic structural diagram of yet another embodiment of the relay provided by the embodiment of the present application;

[0038] Figure 4 It is a schematic structural diagram of still another embodiment of the relay provided by the embodiment of the present application;

[0039] Figure 5 It is a schematic structural diagram of yet another embodiment of the relay provided by the embodiment of the present application;

[0040] Figure 6 It is a schematic structural diagram of another embodiment of the relay provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0042] In the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0043] To extend the service life of the relay, another embodiment of the present application provides a relay, and its specific structure is as Figure 1 shown, specifically including: a controller 100, a contact switch circuit 200 and a non-contact switch circuit 300; the connection relationships between the components are specifically described as follows:

[0044] The input end of the contact switch circuit 200 is connected to the input end of the non-contact switch circuit 300, and the connection point serves as the input end of the relay. The output end of the contact switch circuit 200 is connected to the output end of the non-contact switch circuit 300, and the connection point serves as the output end of the relay.

[0045] Both the contact switch circuit 200 and the non-contact switch circuit 300 are controlled by the controller 100.

[0046] The contact switch circuit 200 is controlled to be turned on and off when the non-contact switch circuit 300 is in the on state.

[0047] Among them, the non-contact switch circuit 300 being in the on state means that the non-contact switch circuit 300 forms a path. In addition, the contact switch circuit 200 being turned on and off means that the contact switch circuit 200 is turned on or off, that is, the contact switch circuit 200 forms a path or an open circuit.

[0048] In this embodiment, the startup process of the relay, that is, the process of the relay forming a path, is specifically described as follows:

[0049] When the controller 100 receives a start signal that causes the relay to form a conducting path, the controller 100 controls the non-contact switch circuit 300 to conduct by outputting a conducting signal to the non-contact switch circuit 300.

[0050] It should be noted that the conduction of the non-contact switch circuit 300 is the same as that of the contact switch circuit 200, which will not be elaborated here.

[0051] After controlling the non-contact switch circuit 300 to conduct, the controller 100 detects the state of the non-contact switch circuit 300. When the controller 100 detects that the non-contact switch circuit 300 is in a conducting state, it controls the contact switch circuit 200 to conduct by outputting a conducting signal to the contact switch circuit 200, thereby starting the relay, that is, causing the relay to form a conducting path.

[0052] In this embodiment, the shutdown process of the relay, that is, the process of the relay forming an open circuit, is specifically described as follows:

[0053] When the controller 100 receives a shutdown signal that causes the relay to form an open circuit, the controller 100 detects the state of the non-contact switch circuit 300. When the controller 100 detects that the non-contact switch circuit 300 is in a conducting state, the controller 100 controls the contact switch circuit 200 to turn off by outputting a turn-off signal to the contact switch circuit 200.

[0054] After controlling the contact switch circuit 200 to turn off, the controller 100 detects the state of the contact switch circuit 200. When the contact switch circuit 200 is in a turned-off state, the controller 100 controls the non-contact switch circuit 300 to turn off by outputting a turn-off signal, thereby shutting down the relay, that is, causing the relay to form an open circuit.

[0055] It should be noted that the contact switch circuit 200 being in a turned-off state means that the contact switch circuit 200 forms an open circuit.

[0056] Since the contact switch circuit 200 is controlled to turn on and off when the non-contact switch circuit 300 is in a conducting state, when the contact switch circuit 200 is turned on or off, the non-contact switch circuit 300 is already in a conducting state. Therefore, when the contact switch circuit 200 is turned on or off, the voltage drop between the input end and the output end of the contact switch circuit 200 is very small, thereby reducing the possibility of the contact switch circuit 200 generating an arc, that is, reducing the possibility of contact carbonization, and further extending the service life of the relay.

[0057] Another embodiment of the present application also provides another implementation manner of the relay. The difference between this implementation manner and the above implementation manner is that:

[0058] In this embodiment, the contactless switch circuit 300 is controlled to turn off when the contact switch circuit 200 is in the on state.

[0059] Among them, the contact switch circuit 200 being in the on state means that the contact switch circuit 200 forms a path. In addition, the controlled turn-off of the contactless switch circuit 300 is the same as that of the contact switch circuit 200, which will not be elaborated here.

[0060] In this embodiment, the starting process of the relay, that is, the process of the relay forming a path, is different from the above embodiment in that:

[0061] In this embodiment, after controlling the contact switch circuit 200 to turn on, the controller 100 detects the state of the contact switch circuit 200. When the controller 100 detects that the contact switch circuit 200 is in the on state, it controls the contactless switch circuit 300 to turn off by outputting a turn-off signal to the contactless switch circuit 300.

[0062] In this embodiment, the shutdown process of the relay, that is, the process of the relay forming an open circuit, is different from the above embodiment in that:

[0063] In this embodiment, before the controller 100 detects the state of the contactless switch circuit 300, the controller 100 controls the contactless switch circuit 300 to turn on by outputting a turn-on signal to the contactless switch circuit 300.

[0064] Since the contactless switch circuit 300 is controlled to turn off when the contact switch circuit 200 is in the on state, the time that the contactless switch circuit 300 is in the on state is reduced, so the switching loss of the contactless switch circuit 300 is reduced. In addition, the occurrence of failure problems caused by the contactless switch circuit 300 being in the on state for a long time is also avoided to a certain extent.

[0065] Another embodiment of the present application provides an implementation manner of the contactless switch circuit 300 and the contact switch circuit 200, and its specific structure is as Figure 2 shown, specifically including: a switch 10 and a transformer TR; the connection relationships between the components are specifically as described below:

[0066] The switch 10 is controlled by the controller 100. The input end of the switch 10 serves as the input end of the corresponding switch circuit, the output end of the switch 10 is connected to one end of the primary winding of the transformer TR, and the other end of the primary winding of the transformer TR is grounded to GND. One end of the secondary winding of the transformer TR serves as the output end of the corresponding switch circuit, and the other end of the secondary winding of the transformer TR is grounded to GND.

[0067] It should be noted that the turns ratio of the transformer TR is set according to the actual situation. Usually, the turns ratio of the transformer TR is equal to 1:1.

[0068] In the contactless switch circuit 300, the switch 10 is a contactless switch; in the contact switch circuit 200, the switch 10 is a contact switch.

[0069] When the switch 10 is controlled to conduct, a path is formed between the input end and the output end of the switch 10, so that the primary winding of the transformer TR is energized, and then a current flows through the secondary winding of the transformer TR. Therefore, the corresponding switch circuit forms a path, that is, the corresponding switch circuit conducts.

[0070] When the switch 10 is controlled to turn off, an open circuit is formed between the input end and the output end of the switch 10, so that the primary winding of the transformer TR is not energized, and then no current flows through the secondary winding of the transformer TR. Therefore, the corresponding switch circuit forms an open circuit, that is, the corresponding switch circuit turns off.

[0071] In this embodiment, due to the provision of the transformer TR, electrical isolation between the input end and the output end of the switch circuit is achieved, thereby reducing the electrical influence of the relay on its subsequent circuit and improving the safety of the subsequent circuit of the relay.

[0072] Another embodiment of the present application provides another implementation manner of the contactless switch circuit 300 and the contact switch circuit 200, and its specific structure is as Figure 3 shown. On the basis of the above embodiment, this embodiment further includes: a current detection circuit 20; the connection relationship between each device is specifically as follows:

[0073] The detection object of the current detection circuit 20 is the switch 10. Specifically, the current detection circuit 20 detects the current flowing through the switch 10.

[0074] The output end of the current detection circuit 20 is connected to the feedback end of the controller 100, that is: the current detection circuit 20 outputs its own detection result to the controller 100. If the detection result of the current detection circuit 20 is that the current flowing through the switch 10 is greater than the preset value, that is, it indicates that there is current flowing through the switch 10, then the controller 100 detects that the switch 10 is in the on state, so that the controller 100 detects that the corresponding switch circuit is in the on state. If the detection result of the current detection circuit 20 is that the current flowing through the switch 10 is less than the preset value, that is, it indicates that there is almost no current flowing through the switch 10, then the controller 100 detects that the switch 10 is in the off state, so that the controller 100 detects that the corresponding switch circuit is in the off state.

[0075] It should be noted that the preset value is set according to the actual situation and is not specifically limited here.

[0076] In this embodiment, the controller 100 can detect the state of the switching circuit through the current detection circuit 20, so that the controller 100 no longer needs to integrate the detection function of the switching circuit, thereby making the selection of the controller 100 easier.

[0077] Another embodiment of the present application provides an implementation manner of the current detection circuit 20, and its specific structure is as Figure 3 shown, which specifically includes: an auxiliary winding, a rectification circuit 21, and a voltage stabilization circuit 22; the connection relationships between the components are specifically described as follows:

[0078] The auxiliary winding is wound around the iron core of the transformer TR.

[0079] It should be noted that the turn ratio of the primary winding to the auxiliary winding of the transformer TR is set according to the actual situation. Usually, the turn ratio of the primary winding to the auxiliary winding of the transformer TR is equal to 1:1.

[0080] Both ends of the auxiliary winding are respectively connected to both ends of the AC side of the rectification circuit 21. The DC side of the rectification circuit 21 is connected to the input side of the voltage stabilization circuit 22, and the output end of the voltage stabilization circuit 22 is connected to the feedback end of the controller 100.

[0081] Among them, the rectification circuit 21 is used to convert alternating current into direct current. In addition, the voltage stabilization circuit 22 is used to keep the output potential of the current detection circuit 20 basically unchanged.

[0082] Since the auxiliary winding is wound around the iron core of the transformer TR, when the primary winding of the transformer TR is energized, there is current flowing through the auxiliary winding, that is, there is current flowing through the rectification circuit 21 and the voltage stabilization circuit 22, so that the rectification circuit 21 and the voltage stabilization circuit operate normally, and at this time, the output potential of the voltage stabilization circuit 22 is equal to the set voltage stabilization value of the voltage stabilization circuit 22. On the contrary, when the primary winding of the transformer TR is not energized, there is no current flowing through the auxiliary winding, that is, there is no current flowing through the rectification circuit 21 and the voltage stabilization circuit 22, so that the rectification circuit 21 and the voltage stabilization circuit 22 do not work, and at this time, the output potential of the voltage stabilization circuit 22 is not equal to the set voltage stabilization value of the voltage stabilization circuit 22.

[0083] When the potential of the feedback end of the controller 100 is equal to the set voltage stabilization value of the voltage stabilization circuit 22, the controller 100 detects that the corresponding switching circuit is in the on state. When the potential of the feedback end of the controller 100 is not equal to the set voltage stabilization value of the voltage stabilization circuit 22, the controller 100 detects that the corresponding switching circuit is in the off state.

[0084] It should be noted that the set voltage stabilization value of the voltage stabilization circuit 22 is set according to the actual situation, and no specific limitation is made here.

[0085] In this embodiment, the auxiliary winding can be used to sample the current flowing through the switch 10 by means of the transformer TR in the current detection circuit 20, so that the structure of the current detection circuit 20 is simplified, that is, the structure of the relay is simplified, thereby reducing the overall cost of the relay.

[0086] Another embodiment of the present application provides an implementation manner of the rectification circuit 21, and its specific structure is as Figure 4 shown, specifically including: a first diode D1, a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2; the connection relationships between the components are specifically described as follows:

[0087] The anode of the first diode D1 serves as one end of the AC side of the rectification circuit 21. The cathode of the first diode D1 is connected to one end of the first capacitor C1, and the connection point serves as the positive pole of the DC side of the rectification circuit 21. The other end of the first capacitor C1 serves as the other end of the AC side of the rectification circuit 21 and the negative pole of the DC side of the rectification circuit 21 respectively. The negative pole of the DC side of the rectification circuit 21 is grounded to GND.

[0088] The first resistor R1 and the second capacitor C2 are connected in series, and the formed series branch is connected in parallel with the first diode D1. The second resistor R2 is connected in parallel with the first capacitor C1.

[0089] The first diode D1 is used for half-wave rectification to convert alternating current into pulsating direct current. The first capacitor C1 is used for filtering to convert pulsating direct current into smooth direct current.

[0090] In this embodiment, the rectification function is achieved only by devices such as diodes, capacitors, and resistors. Therefore, the structure of this implementation manner of the rectification circuit 21 is relatively simple, so that the structure of the relay is simplified, and further the overall cost of the relay is reduced.

[0091] The above is only one implementation manner of the rectification circuit 21. In practical applications, it includes but is not limited to this. No specific limitation is made here and it can be determined according to specific situations, and all are within the protection scope of the present application.

[0092] Another embodiment of the present application provides an implementation manner of the voltage stabilization circuit 22, and its specific structure is as Figure 5 shown, specifically including: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a third capacitor C3, and a voltage stabilizer 221; the connection relationships between the components are specifically described as follows:

[0093] One end of the third resistor R3 serves as the positive electrode on the input side of the voltage stabilizing circuit 22. The other end of the third resistor R3 is connected to one end of the fourth resistor R4, and the connection point is connected to the control terminal of the voltage regulator 221. The other end of the fourth resistor R4 serves as the negative electrode on the input side of the voltage stabilizing circuit 22. The negative electrode on the input side of the voltage stabilizing circuit 22 is grounded to GND.

[0094] The input terminal of the voltage regulator 221 is grounded to GND. The output terminal of the voltage regulator 221 serves as the output terminal of the voltage stabilizing circuit 22. The fifth resistor R5 and the third capacitor C3 are connected in series, and both ends of the formed series branch are respectively connected to the control terminal and the output terminal of the voltage regulator 221.

[0095] The voltage on the DC side of the rectifying circuit 21 is input to the control terminal of the voltage regulator 221 after being divided by the third resistor R3 and the fourth resistor R4. The voltage regulator 221 compares the potential of its own control terminal with its own reference potential, and sends the comparison result to the control circuit.

[0096] In this embodiment, the voltage stabilizing function is achieved only by devices such as capacitors, resistors, and the voltage regulator 221. Therefore, the structure of this embodiment of the voltage stabilizing circuit 22 is relatively simple, which simplifies the structure of the relay, and thus reduces the overall cost of the relay.

[0097] The above is only one embodiment of the voltage stabilizing circuit 22. In practical applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0098] Another embodiment of the present application provides an embodiment of a contactless switch. In this embodiment, the contactless switch is a controllable switch tube made of a wide-bandgap semiconductor material, such as Figure 6 shown as M in

[0099] Optionally, the wide-bandgap semiconductor material can be GaN. In practical applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0100] If the controllable switch tube is made of a wide-bandgap semiconductor material, such as GaN, the controllable switch tube can be a HEMT (High Electron Mobility Transistor), or a MOS tube (Metal-Oxide-Semiconductor Field-Effect Transistor). In practical applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0101] Taking GaN as an example, the advantages of a controllable switch using a wide-bandgap semiconductor material are described in detail. The performance parameters of four materials, Si, GaAs, 4H-SiC, and GaN, are shown in the following table:

[0102]

[0103] It can be deduced from the above table that the controllable switch using GaN has lower conduction loss. Therefore, a simpler thermal management method can be used to solve the heat dissipation problem of the controllable switch, which reduces the control complexity of the relay and improves the control reliability of the relay.

[0104] In addition, it can be deduced from the above table that the controllable switch using GaN also has a lower gate potential and output charge. The lower gate potential enables the controllable switch using GaN to have a faster turn-on time and conversion efficiency, and also results in lower loss. The lower output charge can reduce the loss of the controllable switch using GaN. Combining with the lower conduction loss of the controllable switch using GaN, the power density of the controllable switch using GaN can be improved.

[0105] Furthermore, it can be deduced from the above table that the controllable switch using GaN also has zero reverse recovery characteristics. Therefore, the controllable switch using GaN does not require reverse voltage, reverse current, and has a faster cut-off speed, which can greatly reduce the switching loss of the relay.

[0106] Another embodiment of the present application provides an implementation manner of a contact switch, and its specific structure is as Figure 6 shown, specifically including: a contact 11 and a pressing device 12; the connection relationship between each component is described in detail as follows:

[0107] One end of the contact 11 serves as the input end of the switch 10, and the other end of the contact 11 serves as the output end of the switch 10. The contact 11 includes an automatic telescopic locking mechanism 112 and a pin mechanism 111. The pressing device 12 is controlled by the controller 100.

[0108] When the pressing device 12 is controlled to press the pin mechanism 111 for the first time, that is, when an external force is applied to the pin mechanism 111, the pin mechanism 111 inserts a pin, and the automatic telescopic locking mechanism 112 locks the inserted pin of the pin mechanism 111 at the position where the contact 11 is closed, so that the contact 11 is closed.

[0109] When the pressing device 12 is controlled to press the pin mechanism 111 again, that is, when an external force is applied to the pin mechanism 111, the pin mechanism 111 inserts a pin again, and the automatic telescopic locking mechanism 112 unlocks, causing the pin to leave the position where the contact 11 is closed, so that the contact 11 is disconnected.

[0110] In a specific example, such as Figure 6 shown, the pressing device 12 includes: a motor 121 and its motor driver 122.

[0111] Optionally, the motor 121 can be an ultra - micro stepping motor. In practical applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific circumstances, all within the protection scope of this application.

[0112] The above example only shows one implementation manner of the pressing device 12. In practical applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific circumstances, all within the protection scope of this application.

[0113] In this embodiment, since the automatic telescopic locking mechanism 112 can lock the pin of the pin mechanism 111 in the position where the contact 11 is closed, without continuous external force applied to the pin mechanism 111, the pin can also be in the position where the contact 11 is closed, that is, the contact 11 is closed. Therefore, the pressing device 12 can stop working after the contact 11 is closed, that is, the pressing device 12 does not need to be continuously powered on, thereby extending the service life of the pressing device 12.

[0114] It is worth noting that in the prior art, the contact is an ordinary contact, that is, it does not include the automatic telescopic locking mechanism 112 and the pin mechanism 111. It is necessary to use the magnetic force generated by the continuous power - on of the coil to keep the contact closed for a long time. Once the coil loses power, the contact will disconnect, so the coil needs to be continuously powered on. However, in this embodiment, the pressing device 12 can ensure that the contact 11 is closed for a long time without continuous power - on. Therefore, this embodiment can solve the aging problem caused by the long - term power - on of the coil in the prior art.

[0115] Another embodiment of this application provides a relay device, which specifically includes: at least one relay provided in the above - mentioned embodiment of this application.

[0116] If the number of relays is greater than 1, the controllers 100 in all relays can be combined into one.

[0117] Regarding the above description of the disclosed embodiments, the features described in each embodiment in this specification can be replaced or combined with each other, enabling those skilled in the art to implement or use this application. As mentioned above, these are merely the preferred embodiments of the present utility model and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above in its preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical content disclosed above, or modify it into equivalent embodiments with equivalent changes. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A relay, characterized in that, Comprising: A controller, a contact switch circuit, and a contactless switch circuit; wherein: The input end of the contact switch circuit is connected to the input end of the contactless switch circuit, and the connection point serves as the input end of the relay; The output end of the contact switch circuit is connected to the output end of the contactless switch circuit, and the connection point serves as the output end of the relay; Both the contact switch circuit and the contactless switch circuit are controlled by the controller; The contact switch circuit is controlled to be turned on and off when the contactless switch circuit is in the on state.

2. The relay according to claim 1, wherein The contactless switch circuit is controlled to be turned off when the contact switch circuit is in the on state.

3. The relay according to claim 1 or 2, characterized in that, Both the contactless switch circuit and the contact switch circuit include: a switch and a transformer; wherein: The switch is controlled by the controller; The input end of the switch serves as the input end of the corresponding switch circuit, the output end of the switch is connected to one end of the primary winding of the transformer, and the other end of the primary winding is grounded; One end of the secondary winding of the transformer serves as the output end of the corresponding switch circuit, and the other end of the secondary winding is grounded; In the contactless switch circuit, the switch is a contactless switch tube; in the contact switch circuit, the switch is a contact switch.

4. The relay according to claim 3, wherein, Both the contactless switch circuit and the contact switch circuit further include: a current detection circuit; wherein: The detection object of the current detection circuit is the switch; The output end of the current detection circuit is connected to the feedback end of the controller.

5. The relay according to claim 4, characterized in that, The current detection circuit includes: an auxiliary winding, a rectification circuit, and a voltage stabilization circuit; wherein: The auxiliary winding is wound around the iron core of the transformer; Both ends of the auxiliary winding are respectively connected to both ends of the AC side of the rectification circuit; The DC side of the rectification circuit is connected to the input side of the voltage stabilization circuit, and the output end of the voltage stabilization circuit is connected to the feedback end of the controller.

6. The relay according to claim 3, characterized in that, The contactless switch is a controllable switch tube made of a wide bandgap semiconductor material.

7. The relay according to claim 3, wherein The contact switch includes: a contact and a pressing device; wherein: One end of the contact serves as the input end of the switch, and the other end of the contact serves as the output end of the switch; The contact includes an automatic telescopic locking mechanism and a pin mechanism; The pressing device is controlled by the controller.

8. The relay according to claim 7, characterized in that, The pressing device includes: a motor and its motor driver.

9. A relay device, characterized in that, Comprising: At least one relay according to any one of claims 1 to 8.

10. The relay device according to claim 9, wherein If the number of the relays is greater than 1, the controllers in all the relays can be combined into one.

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