CN116364481B - Relay driving circuit, electronic device, and relay driving method - Google Patents
Relay driving circuit, electronic device, and relay driving method Download PDFInfo
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- CN116364481B CN116364481B CN202310423478.4A CN202310423478A CN116364481B CN 116364481 B CN116364481 B CN 116364481B CN 202310423478 A CN202310423478 A CN 202310423478A CN 116364481 B CN116364481 B CN 116364481B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 144
- 238000004146 energy storage Methods 0.000 claims description 47
- 238000007599 discharging Methods 0.000 claims description 15
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 13
- 230000007423 decrease Effects 0.000 description 7
- 238000004590 computer program Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Relay Circuits (AREA)
Abstract
The application relates to a relay driving circuit, an electronic device and a relay driving method. The relay driving circuit comprises a controller and a sub-driving circuit which are connected with each other; the sub-driving circuit is also connected with a relay to be driven; and the controller is used for controlling the sub-driving circuit to drive the relay contacts to be closed or drive the relay contacts to be opened, reducing the driving voltage of the relay under the condition that the relay contacts are closed and increasing the driving voltage of the relay under the condition that the relay contacts are opened. The protection of the contact of the relay is realized, so that the service life of the relay is prolonged.
Description
Technical Field
The present disclosure relates to the field of electromagnetic relays, and in particular, to a relay driving circuit, an electronic device, and a relay driving method.
Background
The magnetic latching relay is one type of electromagnetic relay, the normally closed or normally open state of the magnetic latching relay depends on the action of permanent magnet steel, and the switching state of the magnetic latching relay is switched by triggering a pulse electric signal with a certain width.
Because the contact closing process of the magnetic latching relay can generate collision closing bouncing, and the contact electrified disconnection process of the magnetic latching relay can generate electric arcs when the contacts are separated by a small distance, the service life of the magnetic latching relay is influenced.
Disclosure of Invention
In view of the above, it is desirable to provide a relay driving circuit, an electronic device, and a relay driving method that can improve the service life of a magnetic latching relay.
In a first aspect, the present application provides a relay drive circuit. The relay driving circuit comprises a controller and a sub-driving circuit which are connected with each other; the sub-driving circuit is also connected with a relay to be driven;
and the controller is used for controlling the sub-driving circuit to drive the relay contacts to be closed or drive the relay contacts to be opened, reducing the driving voltage of the relay under the condition that the relay contacts are closed and increasing the driving voltage of the relay under the condition that the relay contacts are opened.
In one embodiment, the sub-driving circuit comprises a switching circuit and a tank circuit which are connected with each other, and the switching circuit and the tank circuit are respectively connected with the relay;
and the controller is used for controlling the switching circuit and the energy storage circuit to form a first loop with the relay so as to drive the relay contacts to be closed and reduce the driving voltage, or controlling the switching circuit and the energy storage circuit to form a second loop with the relay so as to drive the relay contacts to be opened and increase the driving voltage.
In one embodiment, the tank circuit includes a first capacitor, a second capacitor, and a first switch bank; the controller is respectively connected with each switch in the first switch group;
and the controller is used for controlling the first switch group to connect the first capacitor and the second capacitor in parallel so as to reduce the driving voltage, or connect the first capacitor and the second capacitor in series so as to increase the driving voltage.
In one embodiment, the first switch group includes a first switch, a second switch, and a third switch, the first switch is connected to the first capacitor, the second switch is connected to the second capacitor, a first end of the third switch is connected to a common terminal of the first switch and the first capacitor, and a second end of the third switch is connected to a common terminal of the second switch and the second capacitor;
and the controller is used for controlling the first switch and the second switch to be turned on and the third switch to be turned off, connecting the first capacitor and the second capacitor in parallel, or controlling the first switch and the second switch to be turned off and the third switch to be turned on, and connecting the first capacitor and the second capacitor in series.
In one embodiment, in the case where the relay is a normally open relay, the first loop is a charging loop and the second loop is a discharging loop;
In the case where the relay is a normally closed relay, the first circuit is a discharge circuit and the second circuit is a charge circuit.
In one embodiment, when the relay is a normally closed relay, the tank circuit includes a first capacitor, a second capacitor, a first diode, a second diode, and a third diode, where the positive electrode of the first diode is connected to the first capacitor, the negative electrode of the first diode is connected to the second capacitor, the positive electrode of the second diode is connected to the first capacitor, the negative electrode of the second diode is connected to the second capacitor, the positive electrode of the third diode is connected to the common terminal of the second diode and the second capacitor, and the negative electrode of the third diode is connected to the common terminal of the first diode and the first capacitor.
In one embodiment, the switching circuit further comprises a second switch group and a direct current driving power supply which are connected with each other, wherein the second switch group is respectively connected with the controller, the energy storage circuit and the relay; the direct current driving power supply is also connected with the energy storage circuit;
and the controller is used for controlling the second switch group to form a charging loop by the energy storage circuit, the direct-current driving power supply and the relay, or controlling the second switch group to form a discharging loop by the energy storage circuit and the relay.
In one embodiment, the second switch set includes a fourth switch and a fifth switch;
the control electrode of the fourth switch is connected with the controller, the first end of the fourth switch is connected with the relay, and the second end of the fourth switch is connected with the direct current driving power supply;
the control pole of the fifth switch is connected with the controller, the first end of the fifth switch is connected with the relay, and the second end of the fifth switch is respectively connected with the energy storage circuit and the direct current driving power supply.
In one embodiment, the fourth switch and the fifth switch are all triodes, the control poles of the fourth switch and the fifth switch are all base electrodes of the triodes, the first end of the fourth switch and the first end of the fifth switch are all emitting electrodes of the triodes, and the second end of the fourth switch and the second end of the fifth switch are all collecting electrodes of the triodes.
In a second aspect, the present application also provides an electronic device. The electronic device comprises a relay driving circuit as described in the first aspect.
In a third aspect, the present application further provides a relay driving method, including:
the relay contact is driven to be closed or driven to be opened;
under the condition that the relay contacts are closed, the driving voltage of the relay is reduced;
In the case where the relay contacts are opened, the driving voltage of the relay is raised.
In the relay driving circuit, the electronic device and the relay driving method, the relay driving circuit comprises a controller and a sub-driving circuit which are connected with each other; the sub-driving circuit is also connected with a relay to be driven; the controller controls the sub-driving circuit to drive the relay contact to be closed or drive the relay contact to be opened, reduces the driving voltage of the relay under the condition that the relay contact is closed, and increases the driving voltage of the relay under the condition that the relay contact is opened. The relay driving circuit provided by the application reduces the driving voltage of the relay through the condition that the relay contacts are closed so as to reduce elastic collision caused by the closing of the contacts, and increases the driving voltage of the relay under the condition that the relay contacts are opened so as to reduce the time of generating electric arcs between the contacts, thereby realizing the protection of the contacts of the relay and prolonging the service life of the relay.
Drawings
Fig. 1 is one of the block diagrams of a relay driving circuit provided in the embodiment of the present application;
FIG. 2 is a second block diagram of a relay driving circuit according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a tank circuit according to an embodiment of the present disclosure;
FIG. 4 is a second block diagram of a tank circuit according to an embodiment of the present disclosure;
FIG. 5 is a third block diagram of a relay driving circuit according to an embodiment of the present disclosure;
FIG. 6 is a fourth block diagram of a relay driving circuit provided in an embodiment of the present application;
fig. 7 is a block diagram of a driving circuit of a double-coil normally-closed relay according to an embodiment of the present application;
fig. 8 is a schematic flow chart of a relay driving method according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
First, before the technical solution of the embodiments of the present application is specifically described, a description is first given of a technical background or a technical evolution context on which the embodiments of the present application are based. An electromagnetic relay is an electronic control device, and is generally applied to an automatic control circuit, and the working principle of the electromagnetic relay is an automatic switch which uses smaller current and lower voltage to control larger current and higher voltage. The magnetic latching relay is one type of electromagnetic relay, the normally closed or normally open state of the magnetic latching relay depends on the action of permanent magnet steel, and the switching state is switched by triggering by pulse electric signals with a certain width.
Because the contacts of the magnetic latching relay are mostly of metal structures, elastic collision can be generated in the contact closing process of the magnetic latching relay, the contacts of the magnetic latching relay are electrified and disconnected, electric arcs can be generated due to small-distance separation of the contacts, and the service life of the magnetic latching relay is influenced.
To solve the above-described problems, the present application provides a relay driving circuit that reduces the time for generating an arc between contacts by raising the driving voltage of a relay in the case where the contacts of the relay are open. The protection of the contact of the relay is realized, and the service life of the relay is further prolonged.
In one embodiment, fig. 1 is one of the structural diagrams of a relay driving circuit provided in the embodiment of the present application, and as shown in fig. 1, the relay driving circuit 10 includes a controller 11 and a sub driving circuit 12 connected to each other; the sub-driving circuit 12 is also connected to a relay 20 to be driven.
The controller 11 is configured to control the sub-driving circuit 12 to drive the contacts of the relay 20 to close or drive the contacts of the relay 20 to open, and to decrease the driving voltage of the relay 20 in the case where the contacts of the relay 20 are closed, and to increase the driving voltage of the relay 20 in the case where the contacts of the relay 20 are open.
The relay 20 may be a magnetic latching relay, in which a metal coil is contained, and the metal coil of the magnetic latching relay is electrified to generate magnetic force by external voltage, so as to push contacts on the magnetic latching relay to be closed or opened.
In this embodiment, the controller 11 is connected to the sub-driving circuit 12, the sub-driving circuit is connected to the relay 20 to be driven, and the controller 11 controls the sub-driving circuit 12 to generate a driving voltage, so that the contacts of the relay 20 are closed or opened under the action of the driving voltage. For example, during the contact closing of the relay 20, the controller 11 may send a first command to the sub-driving circuit 12, and the sub-driving circuit 12 decreases the driving voltage of the relay 20 according to the first command, at which time the contact closing of the relay 20 will be slower and slower due to the gradual decrease of the driving voltage. When the contacts of the relay 20 need to be opened, the controller 11 may send a second instruction to the sub-driving circuit 12, and the sub-driving circuit 12 increases the driving voltage to the relay 20 according to the second instruction, at which time the contacts of the relay 20 are rapidly opened due to the increase of the driving voltage.
In the above embodiment, the relay driving circuit includes the controller and the sub-driving circuit connected to each other; the sub-driving circuit is also connected with a relay to be driven; the controller controls the sub-driving circuit to drive the relay contact to be closed or drive the relay contact to be opened, reduces the driving voltage of the relay under the condition that the relay contact is closed, and increases the driving voltage of the relay under the condition that the relay contact is opened. The relay driving circuit provided by the application reduces the driving voltage of the relay under the condition that the relay contacts are closed so as to reduce elastic collision caused by the closing of the contacts, and increases the driving voltage of the relay under the condition that the relay contacts are opened so as to reduce the time for generating electric arcs between the contacts. The protection of the contact of the relay is realized, and the service life of the relay is prolonged.
In one embodiment, fig. 2 is a second block diagram of the relay driving circuit according to the embodiment of the present application, and as shown in fig. 2, the sub driving circuit 12 includes a switch circuit 121 and a tank circuit 122 connected to each other, where the switch circuit 121 and the tank circuit 122 are connected to the relay 20, respectively.
The controller 11 is used for controlling the switch circuit 121 and the energy storage circuit 122 to form a first loop with the relay 20 so as to drive the relay 20 to be closed in contact and reduce the driving voltage, or controlling the switch circuit 121 and the energy storage circuit 122 to form a second loop with the relay 20 so as to drive the relay 20 to be opened in contact and increase the driving voltage.
In this embodiment, as shown in fig. 2, the controller 11 may be connected to the switch circuit 121 and the driving circuit 122, and specifically, the tank circuit may include a driving component, in the process of closing the relay 20, the controller 11 may send a first instruction to the switch circuit 121 and the tank circuit 122, the switch circuit 121 and the tank circuit 122 form a first loop according to the first instruction, and a driving voltage generated by the driving component in the first loop is gradually reduced to drive the relay 20 to be slowly closed. When the relay 20 needs to be turned off, the controller 11 may send a second instruction to the switch circuit 121 and the energy storage circuit 122, and the switch circuit 121 and the energy storage circuit 122 form a second loop according to the second instruction, and a driving voltage generated by the driving component in the second loop may be increased to drive the relay 20 to be turned off rapidly.
Alternatively, the controller 11 may be connected to only the switch circuit 121 to control the switch circuit 121 to generate different switch group states, and the tank circuit 122 may form the first loop or the second loop with the switch circuit 121 according to the switch group states of the switch circuit 121. For example, the controller 11 controls the switch circuit to form the switch group state 1, and at this time, the tank circuit 122 may form a first loop with the switch circuit 121 according to the switch group state 1 of the switch circuit 121. The controller 11 controls the switch circuit to form the switch group state 2, and at this time, the tank circuit 122 may form a second loop with the switch circuit 121 according to the switch group state 2 of the switch circuit 121. The switch group state is a state in which each switch in the switch circuit 121 is closed or opened.
In the embodiment of the application, the sub-driving circuit comprises a switching circuit and an energy storage circuit which are connected with each other, and the switching circuit and the energy storage circuit are respectively connected with the relay; the controller controls the switching circuit and the energy storage circuit to form a first loop with the relay so as to drive the relay contacts to be closed and reduce the driving voltage, or controls the switching circuit and the energy storage circuit to form a second loop with the relay so as to drive the relay contacts to be opened and increase the driving voltage. The driving voltage of the relay is reduced through the first loop, so that elastic collision during contact closing is reduced, the driving voltage of the relay is increased through the second loop, the time for contact opening is shortened, and the service life of the relay is prolonged.
In one embodiment, the tank circuit 122 includes a first capacitor, a second capacitor, and a first switch set; the controller is respectively connected with each switch in the first switch group; and a controller 11 for controlling the first switch group to connect the first capacitor and the second capacitor in parallel to reduce the driving voltage, or to connect the first capacitor and the second capacitor in series to increase the driving voltage.
In this embodiment, the tank circuit 122 includes a first capacitor, a second capacitor, and a first switch group; the first switch group includes a plurality of switches, each switch is connected with the controller 11, and is used for receiving a control command sent by the controller 11, and connecting the first capacitor with the second capacitor according to the control command, for example, the first switch group includes a switch 1, a switch 2 and a switch 3, in the process of closing the contacts of the relay 20, the controller 11 sends a third command, the switch 1 and the switch 2 are closed, the first capacitor is connected with the second capacitor in parallel, so as to reduce the driving voltage of the relay 20, thereby driving the contacts of the relay 20 to be slowly closed, when the contacts of the relay 20 need to be opened, the controller 11 sends a fourth command, the switch 3 is closed, and the first capacitor is connected with the second capacitor in series, so as to raise the driving voltage of the relay 20. Thereby driving the contacts of the relay 20 to open rapidly.
In the embodiment of the application, the energy storage circuit comprises a first capacitor, a second capacitor and a first switch group; the controller is respectively connected with each switch in the first switch group; the controller controls the first switch group to connect the first capacitor and the second capacitor in parallel to reduce the driving voltage, or connect the first capacitor and the second capacitor in series to increase the driving voltage. The capacitors are connected in parallel, so that the driving voltage of the relay is reduced, the elastic collision when the contacts are closed is reduced, and the driving voltage of the relay is increased by connecting the capacitors in series, so that the time for opening the contacts is shortened, and the service life of the relay is prolonged.
In one embodiment, fig. 3 is one of the structures of the tank circuits provided in the embodiments of the present application, as shown in fig. 3, the first switch group includes a first switch S1, a second switch S2, and a third switch S3, where the first switch S1 is connected to the first capacitor C1, the second switch S2 is connected to the second capacitor C2, a first end of the third switch S3 is connected to a common end of the first switch S1 and the first capacitor C1, and a second end of the third switch S3 is connected to a common end of the second switch S2 and the second capacitor C2.
The controller 11 is configured to control the first switch S1 and the second switch S2 to be turned on and the third switch S3 to be turned off, and connect the first capacitor C1 and the second capacitor C2 in parallel, or control the first switch S1 and the second switch S2 to be turned off and the third switch S3 to be turned on, and connect the first capacitor C1 and the second capacitor C2 in series.
Illustratively, the first switch S1 is connected to the first capacitor C1, the second switch S2 is connected to the second capacitor C2, the first end of the third switch S3 is connected to the common terminal of the first switch S1 and the first capacitor C1, and the second end of the third switch S3 is connected to the common terminal of the second switch S2 and the second capacitor C2. The controller 11 is connected to the first switch S1, the second switch S2, and the third switch S3, and is configured to send control instructions to the first switch S1, the second switch S2, and the third switch S3, control the first switch S1 and the second switch S2 to be turned on, and control the third switch S3 to be turned off, and connect the first capacitor C1 and the second capacitor C2 in parallel, so as to implement parallel charging or parallel discharging of the first capacitor C1 and the second capacitor C2. The controller 11 may control the first switch S1 and the second switch S2 to be turned off and the third switch S3 to be turned on, and connect the first capacitor C1 and the second capacitor C2 in series. To achieve series charging or series discharging of the first capacitor C1 and the second capacitor C2.
In the embodiment of the application, the first switch group comprises a first switch, a second switch and a third switch, the first switch is connected with the first capacitor, the second switch is connected with the second capacitor, the first end of the third switch is connected with the common end of the first switch and the first capacitor, and the second end of the third switch is connected with the common end of the second switch and the second capacitor; and the controller is used for controlling the first switch and the second switch to be turned on and the third switch to be turned off, connecting the first capacitor and the second capacitor in parallel, or controlling the first switch and the second switch to be turned off and the third switch to be turned on, and connecting the first capacitor and the second capacitor in series. The first capacitor and the second capacitor are connected in series or in parallel by controlling the on/off of each switch of the switch group, so that the driving voltage of the relay can be reduced or increased, and the contact of the relay is protected.
In one embodiment, the relay to be driven may be a normally open relay or a normally closed relay, and the first circuit is a charging circuit and the second circuit is a discharging circuit when the relay is a normally open relay.
In this embodiment, when the relay 20 to be driven is a normally open relay, the power voltage value in the first loop is set to be 0.9 times the rated voltage value of the relay 20, and when the relay 20 is started, the contacts of the relay 20 need to be driven to close, so as to reduce elastic collision generated when the contacts of the relay 20 are closed, the driving voltage of the relay 20 needs to be reduced in the process of closing the contacts of the relay 20, so that the contacts of the relay 20 are slowly closed. Therefore, the first switch S1 and the second switch S2 may be closed, the third switch S3 may be opened, and the first loop for parallel charging may be formed in the tank circuit 122, thereby parallel charging the first capacitor C1 and the second capacitor C2. In the parallel circuit, the equivalent capacitance increases, because the relay and the energy storage circuit are connected in series, when parallel charging is started, the driving voltage of the relay 20 is the power supply voltage, the voltage in the energy storage circuit 122 is 0, along with charging the first capacitor and the second capacitor, the driving voltage of the relay 20 gradually decreases, excitation generated by a coil in the relay 20 gradually decreases, electromagnetic force generated by an electromagnetic system gradually decreases, acceleration of contact movement gradually decreases, closing of the relay contact slows down, and meanwhile, the voltage in the energy storage circuit 122 gradually increases. If the contacts of the relay 20 need to be opened, in order to reduce the time for arc generation, the driving voltage across the relay 20 needs to be increased to make the contacts of the relay 20 open quickly. Accordingly, the first switch S1 and the second switch S2 may be opened, the third switch S3 may be closed, and a second loop of the series discharge may be formed in the tank circuit 122. At this time, the capacity of the equivalent capacitors of the first capacitor and the second capacitor is reduced, but since the first capacitor C1 and the second capacitor C2 are connected in series, the discharge voltage generated by the first capacitor C1 and the second capacitor C2 in the second loop is twice the power supply voltage in the first loop, correspondingly, the driving voltage of the relay 20 is also twice the driving voltage of the first loop when charging is just started, that is, 1.8 times the rated voltage of the relay, the excitation generated by the coil in the relay 20 is increased, the electromagnetic force generated by the electromagnetic system is increased, and the contacts of the relay 20 are rapidly opened.
In the case where the relay is a normally closed relay, the first circuit is a discharge circuit and the second circuit is a charge circuit.
For example, if the relay 20 is a normally closed relay, the power supply voltage may be set to 1.8 times the rated voltage of the relay 20 at this time. For a normally closed relay, when the relay 20 is started, the contacts of the relay 20 need to be opened, at this time, the first switch S1 and the second switch S2 can be opened, the third switch S3 can be closed, the capacitors are charged, a first loop for series charging is formed in the tank circuit 122, at the moment when the first capacitor C1 and the second capacitor C2 are just started to be charged, the voltages at the two ends of the first capacitor C1 and the second capacitor C2 are 0, the driving voltage generated at the two ends of the relay 20 is the power supply voltage, and since the power supply voltage is 1.8 times of the rated voltage of the relay 20, the contacts of the relay 20 are rapidly opened, and when the charging is completed, the voltages at the two ends of the first capacitor C1 and the second capacitor C2 are half of the power supply voltage. When the relay 20 is turned off, the contacts of the relay 20 need to be closed, and at this time, the first switch S1 and the second switch S2 may be closed, the third switch S3 may be opened, and a second circuit of parallel discharge may be formed in the tank circuit 122. During parallel discharge, the voltages at the two ends of the first capacitor C1 and the second capacitor C2 are half of the power supply voltage, so that the voltage at which the first capacitor C1 and the second capacitor C2 are discharged in parallel is half of the power supply voltage, that is, the driving voltage supplied to the relay 20 is 0.9 times of the rated voltage of the relay 20, and the closing speed of the contacts of the relay 20 is slowed down due to the reduction of the driving voltage.
In the embodiment of the application, under the condition that the relay is a normally open relay, the first loop is a charging loop, and the second loop is a discharging loop; in the case where the relay is a normally closed relay, the first circuit is a discharge circuit and the second circuit is a charge circuit. The protection of the contacts of each type of relay is realized, and the flexibility of the relay driving circuit is improved.
In one embodiment, as shown in fig. 4, fig. 4 is a second diagram of a tank circuit provided in the embodiment of the present application, where the relay 20 is a normally closed relay, the tank circuit 122 includes a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2, and a third diode D3, the anode of the first diode D1 is connected to the first capacitor C1, the cathode of the first diode D1 is connected to the second capacitor C2, the anode of the second diode D2 is connected to the first capacitor C1, the cathode of the second diode D2 is connected to the second capacitor C2, the anode of the third diode D3 is connected to a common terminal of the second diode D2 and the second capacitor C2, and the cathode of the third diode D3 is connected to a common terminal of the first diode D1 and the first capacitor C1.
In this embodiment, in the case where the relay 20 is a normally closed relay, the first switch S1 may be replaced with the first diode D1, the second switch S2 may be replaced with the second diode D2, and the third switch S3 may be replaced with the third diode D3. If the contacts of the relay 20 need to be opened, the relay 20 needs to be charged in parallel, and at this time, the current flows from the a terminal to the B terminal, and the current cannot flow through the first diode D1 and the second diode D2 due to the characteristics of the diodes, so that a second loop for series charging is formed. If the contacts of the relay 20 need to be closed, at this time, current flows from the B terminal to the a terminal, and the current cannot flow through the third diode D3 due to the characteristics of the diode, a first circuit of parallel discharge is formed.
In this embodiment, under the condition that the relay is normally closed relay, tank circuit includes first electric capacity, second electric capacity, first diode, second diode and third diode, and the anodal and the first electric capacity of first diode are connected, and the negative pole and the second electric capacity of first diode are connected, and the anodal and the first electric capacity of second diode are connected, and the negative pole and the second electric capacity of second diode are connected, and the anodal and the public end of second diode and second electric capacity of third diode are connected, and the negative pole and the public end of first diode and first electric capacity of third diode are connected. When the relay is a normally closed relay, each switch in the energy storage circuit is replaced by a diode, so that the flexibility of the relay driving circuit is improved.
In one embodiment, fig. 5 is a third block diagram of the relay driving circuit provided in the embodiment of the present application, where the switching circuit 121 further includes a second switch set S40 and a dc driving power source VDC1 that are connected to each other, and the second switch set S40 is connected to the controller 11, the tank circuit 122, and the relay 20, respectively; the dc driving power source S40 is also connected to the energy storage circuit 122.
In this embodiment, when the first capacitor C1 and the second capacitor C2 are charged, the controller 11 sends a fifth command to the second switch set S40, and the second switch set S40 turns on the relay 20, the tank circuit 122, and the dc power supply VDC1 according to the fifth command to form a charging circuit. When the first capacitor C1 and the second capacitor C2 are discharged, the controller 11 sends a sixth command to the second switch group S40, and the second switch group S40 turns on the tank circuit 122 and the relay 20 to form a discharge loop according to the sixth command.
In this embodiment, the switching circuit further includes a second switch group and a dc driving power supply that are connected to each other, where the second switch group is connected to the controller, the tank circuit, and the relay, respectively; the direct current driving power supply is also connected with the energy storage circuit, and the controller is used for controlling the second switch group to form a charging loop with the energy storage circuit, the direct current driving power supply and the relay, or controlling the second switch group to form a discharging loop with the energy storage circuit and the relay. Because the charging loop and the discharging loop generate different driving voltages for the relay, a precondition is provided for realizing the protection of the contact of the relay.
In one embodiment, fig. 6 is a fourth block diagram of a relay driving circuit provided in an embodiment of the present application, and the second switch set S40 includes a fourth switch S41 and a fifth switch S42.
The control electrode of the fourth switch S41 is connected to the controller 11, the first terminal of the fourth switch S41 is connected to the relay 20, and the second terminal of the fourth switch S41 is connected to the dc drive power source VDC 1.
Illustratively, the control stage of the fourth switch S41 is connected to the controller 11, the first terminal of the fourth switch S41 is connected to the relay 20, and the second terminal of the fourth switch S41 is connected to the dc drive power source VDC 1. The controller 20 sends a fifth command to the fourth switch S41, and the fourth switch S41 is closed after receiving the fifth command, and at this time, the fourth switch S41, the relay 20, the tank circuit 122, and the dc power supply VDC1 form a charging circuit.
The control electrode of the fifth switch S42 is connected to the controller 11, the first terminal of the fifth switch S42 is connected to the relay 20, and the second terminal of the fifth switch S42 is connected to the tank circuit 122 and the dc driving power source VDC1, respectively.
Illustratively, the control electrode of the fifth switch S42 is connected to the controller 11, the first terminal of the fifth switch S42 is connected to the relay 20, and the second terminal of the fifth switch S42 is connected to the tank circuit 122 and the dc drive power source VDC1, respectively. The controller 20 sends a sixth instruction to the fifth switch S42, and the fifth switch S42 is closed after receiving the sixth instruction, and at this time, the fifth switch S42, the relay 20, and the tank circuit 122 form a discharge loop.
In the embodiment of the application, the second switch group comprises a fourth switch and a fifth switch; the control electrode of the fourth switch is connected with the controller, the first end of the fourth switch is connected with the relay, and the second end of the fourth switch is connected with the direct current driving power supply; the control pole of the fifth switch is connected with the controller, the first end of the fifth switch is connected with the relay, and the second end of the fifth switch is respectively connected with the energy storage circuit and the direct current driving power supply. Because the charging loop and the discharging loop generate different driving voltages for the relay, a precondition is provided for realizing the protection of the contact of the relay.
In one embodiment, the fourth switch and the fifth switch are all triodes, the control poles of the fourth switch and the fifth switch are all base electrodes of the triodes, the first end of the fourth switch and the first end of the fifth switch are all emitting electrodes of the triodes, and the second end of the fourth switch and the second end of the fifth switch are all collecting electrodes of the triodes.
In this embodiment, the fourth switch S41 and the fifth switch S42 may be transistors, for example, the fourth switch S41 may be an NPN transistor, and the fifth switch S42 may be a PNP transistor. At this time, the control electrodes of the fourth switch S41 and the fifth switch S42 are all bases of the triode, the first end of the fourth switch S41 and the first end of the fifth switch S42 are all emitters of the triode, and the second end of the fourth switch S41 and the second end of the fifth switch S42 are all collectors of the triode.
In this embodiment of the present application, the fourth switch and the fifth switch are all triodes, the control electrode of the fourth switch and the fifth switch is the base of the triode, the first end of the fourth switch and the first end of the fifth switch are all the emitting electrodes of the triode, and the second end of the fourth switch and the second end of the fifth switch are all the collecting electrodes of the triode. The fourth switch and the fifth switch are replaced by triodes, so that the flexibility of the relay driving circuit is improved.
In one embodiment, the fourth switch S41 may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). The fifth switch S42 may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). At this time, the relay 20 may be a two-coil normally open relay or a two-coil normally closed relay. Fig. 7 is a block diagram of a driving circuit of a double-coil normally-closed relay according to an embodiment of the present application, and as shown in fig. 7, a fourth switch S41 is an N-type MOSFET. The fifth switch S42 is a P-type MOSFET. The relay 20 is a double-coil normally-closed relay, the coil L1 is an exciting coil, the coil L2 is a reset coil, and the fourth switch S41, the exciting coil L1, the tank circuit 122 and the driving power source VDC1 constitute a charging circuit. In the charging circuit, the tank circuit 122 supplies a driving voltage to the exciting coil L1, the coil L1 is excited, and the contacts of the relay 20 are opened. The reset coil L2, the tank circuit 122, and the fifth switch S42 constitute a discharge circuit in which the tank circuit 122 supplies a driving voltage to the exciting coil L2, the coil L2 generates a current, and the contacts of the relay 20 are closed.
In one embodiment, an electronic device is provided that includes the relay driving circuit in the above embodiment.
In the embodiment of the application, the electronic equipment comprises a relay driving circuit, wherein the relay driving circuit comprises a controller and a sub-driving circuit which are connected with each other; the sub-driving circuit is also connected with a relay to be driven.
The controller controls the sub-driving circuit to drive the relay contact to be closed or drive the relay contact to be opened, reduces the driving voltage of the relay under the condition that the relay contact is closed, and increases the driving voltage of the relay under the condition that the relay contact is opened.
In one embodiment, the sub-driving circuit includes a switching circuit and a tank circuit connected to each other, and the switching circuit and the tank circuit are connected to the relay, respectively.
The controller controls the switching circuit and the energy storage circuit to form a first loop with the relay so as to drive the relay contacts to be closed and reduce the driving voltage, or controls the switching circuit and the energy storage circuit to form a second loop with the relay so as to drive the relay contacts to be opened and increase the driving voltage.
In one embodiment, the tank circuit includes a first capacitor, a second capacitor, and a first switch bank; the controller is connected with each switch in the first switch group respectively.
The controller controls the first switch group to connect the first capacitor and the second capacitor in parallel to reduce the driving voltage, or connect the first capacitor and the second capacitor in series to increase the driving voltage.
In one embodiment, the first switch group includes a first switch, a second switch, and a third switch, the first switch is connected to the first capacitor, the second switch is connected to the second capacitor, a first end of the third switch is connected to a common terminal of the first switch and the first capacitor, and a second end of the third switch is connected to a common terminal of the second switch and the second capacitor.
The controller controls the first switch and the second switch to be turned on, and controls the third switch to be turned off, so that the first capacitor and the second capacitor are connected in parallel, or controls the first switch and the second switch to be turned off, and controls the third switch to be turned on, so that the first capacitor and the second capacitor are connected in series.
In one embodiment, where the relay is a normally open relay, the first circuit is a charging circuit and the second circuit is a discharging circuit.
In the case where the relay is a normally closed relay, the first circuit is a discharge circuit and the second circuit is a charge circuit.
In one embodiment, when the relay is a normally closed relay, the tank circuit includes a first capacitor, a second capacitor, a first diode, a second diode and a third diode, wherein the positive electrode of the first diode is connected with the first capacitor, the negative electrode of the first diode is connected with the second capacitor, the positive electrode of the second diode is connected with the first capacitor, the negative electrode of the second diode is connected with the second capacitor, the positive electrode of the third diode is connected with the common end of the second diode and the second capacitor, and the negative electrode of the third diode is connected with the common end of the first diode and the first capacitor.
In one embodiment, the switching circuit further comprises a second switch group and a direct current driving power supply which are connected with each other, wherein the second switch group is respectively connected with the controller, the energy storage circuit and the relay; the direct current driving power supply is also connected with the energy storage circuit.
The controller controls the second switch group to form the energy storage circuit, the direct-current driving power supply and the relay into a charging loop, or controls the second switch group to form the energy storage circuit and the relay into a discharging loop.
In one embodiment, the second switch set includes a fourth switch and a fifth switch.
The control pole of the fourth switch is connected with the controller, the first end of the fourth switch is connected with the relay, and the second end of the fourth switch is connected with the direct current driving power supply.
The control pole of the fifth switch is connected with the controller, the first end of the fifth switch is connected with the relay, and the second end of the fifth switch is respectively connected with the energy storage circuit and the direct current driving power supply.
In one embodiment, the fourth switch and the fifth switch are all triodes, the control poles of the fourth switch and the fifth switch are all base electrodes of the triodes, the first end of the fourth switch and the first end of the fifth switch are all emitting electrodes of the triodes, and the second end of the fourth switch and the second end of the fifth switch are all collecting electrodes of the triodes.
The electronic equipment comprises a relay driving circuit, wherein the relay driving circuit comprises a controller and a sub-driving circuit which are connected with each other; the sub-driving circuit is also connected with a relay to be driven; the controller controls the sub-driving circuit to drive the relay contact to be closed or drive the relay contact to be opened, reduces the driving voltage of the relay under the condition that the relay contact is closed, and increases the driving voltage of the relay under the condition that the relay contact is opened. This electronic equipment is because including the relay drive circuit that this application provided, this relay drive circuit through reducing the drive voltage of relay under the condition that the relay contact closed to reduce the elasticity collision that arouses when the contact is closed, rise the drive voltage of relay under the condition that the relay contact opened, with the time that produces the electric arc between the reduction contact, realized the protection to the contact of relay, owing to included this relay drive circuit in the above-mentioned electronic equipment, improved the stability of electronic equipment in the use.
In one embodiment, fig. 8 is a schematic flow chart of a relay driving method according to an embodiment of the present application, and the method may be applied to the relay driving device 10 according to the foregoing embodiment, and includes the following steps:
S801, the driving relay contact is closed or the driving relay contact is opened.
S802, when the relay contacts are closed, the driving voltage of the relay is lowered.
S803, in the case where the relay contacts are opened, the driving voltage of the relay is raised.
In the embodiment of the application, the relay contact is closed or opened by driving the relay contact; further, under the condition that the relay contacts are closed, the driving voltage of the relay is reduced; in the case where the relay contacts are opened, the driving voltage of the relay is raised. The protection of electric shock of the relay is realized, and the service life of the relay is prolonged.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
In one embodiment, an electronic device is provided that includes a memory having a computer program stored therein and a processor that when executing the computer program performs the steps of:
the relay contact is driven to be closed or driven to be opened;
under the condition that the relay contacts are closed, the driving voltage of the relay is reduced;
in the case where the relay contacts are opened, the driving voltage of the relay is raised.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
the relay contact is driven to be closed or driven to be opened;
under the condition that the relay contacts are closed, the driving voltage of the relay is reduced;
in the case where the relay contacts are opened, the driving voltage of the relay is raised.
In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of:
the relay contact is driven to be closed or driven to be opened;
under the condition that the relay contacts are closed, the driving voltage of the relay is reduced;
In the case where the relay contacts are opened, the driving voltage of the relay is raised.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (4)
1. A relay driving circuit, characterized in that the relay driving circuit comprises a controller and a sub-driving circuit which are connected with each other; the sub-driving circuit is also connected with a relay to be driven;
the sub-driving circuit comprises a switching circuit and an energy storage circuit which are connected with each other, and the switching circuit and the energy storage circuit are respectively connected with the relay;
The controller is used for controlling the switching circuit, the energy storage circuit and the relay to form a first loop so as to drive the relay contacts to be closed and reduce the driving voltage of the relay, or controlling the switching circuit, the energy storage circuit and the relay to form a second loop so as to drive the relay contacts to be opened and increase the driving voltage;
the energy storage circuit comprises a first capacitor, a second capacitor and a first switch group; the controller is respectively connected with each switch in the first switch group;
the first switch group comprises a first switch, a second switch and a third switch, the first switch is connected with the first capacitor, the second switch is connected with the second capacitor, the first end of the third switch is connected with the common end of the first switch and the first capacitor, and the second end of the third switch is connected with the common end of the second switch and the second capacitor;
the controller is used for controlling the first switch and the second switch to be turned on and the third switch to be turned off, connecting the first capacitor and the second capacitor in parallel so as to reduce the driving voltage, or controlling the first switch and the second switch to be turned off and the third switch to be turned on, and connecting the first capacitor and the second capacitor in series so as to increase the driving voltage;
In the case that the relay is a normally open relay, the first loop is a charging loop, and the second loop is a discharging loop;
in the case that the relay is a normally closed relay, the first loop is a discharging loop, and the second loop is a charging loop;
the switching circuit comprises a second switch group and a direct current driving power supply which are connected with each other; the second switch group comprises a fourth switch and a fifth switch; the control electrode of the fourth switch is connected with the controller, the first end of the fourth switch is connected with the relay, and the second end of the fourth switch is connected with the direct current driving power supply; the control electrode of the fifth switch is connected with the controller, the first end of the fifth switch is connected with the relay, and the second end of the fifth switch is respectively connected with the energy storage circuit and the direct current driving power supply; the direct current driving power supply is also connected with the energy storage circuit;
the controller is used for controlling the second switch group to form the energy storage circuit, the direct current driving power supply and the relay into the charging loop, or controlling the second switch group to form the energy storage circuit and the relay into the discharging loop.
2. The relay driving circuit according to claim 1, wherein the fourth switch and the fifth switch are transistors, the control electrodes of the fourth switch and the fifth switch are bases of the transistors, the first terminal of the fourth switch and the first terminal of the fifth switch are emitters of the transistors, and the second terminal of the fourth switch and the second terminal of the fifth switch are collectors of the transistors.
3. An electronic device comprising the relay driving circuit according to any one of claims 1-2.
4. A relay driving method, applied to the relay driving circuit according to any one of claims 1 to 2, comprising:
the controller controls the switch circuit, the energy storage circuit and the relay to form a first loop so as to drive the relay contacts to be closed and reduce the driving voltage of the relay, or controls the switch circuit, the energy storage circuit and the relay to form a second loop so as to drive the relay contacts to be opened and increase the driving voltage;
the controller controls the switch circuit, the energy storage circuit and the relay to form a first loop so as to drive the relay contact to be closed and reduce the driving voltage of the relay, and the controller comprises:
The controller controls the first switch and the second switch to be turned on, and the third switch to be turned off, and the first capacitor and the second capacitor are connected in parallel so as to reduce the driving voltage;
the controller controls the switching circuit and the energy storage circuit to form a second loop with the relay so as to drive the relay contact to be disconnected and increase the driving voltage, and the controller comprises:
the controller controls the first switch and the second switch to be turned off, and the third switch to be turned on, and the first capacitor and the second capacitor are connected in series so as to increase the driving voltage;
the method further comprises the steps of:
the controller controls the second switch group to form the energy storage circuit, the direct current driving power supply and the relay into the charging loop, or controls the second switch group to form the energy storage circuit and the relay into the discharging loop.
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| CN202310423478.4A CN116364481B (en) | 2023-04-19 | 2023-04-19 | Relay driving circuit, electronic device, and relay driving method |
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| CN202310423478.4A CN116364481B (en) | 2023-04-19 | 2023-04-19 | Relay driving circuit, electronic device, and relay driving method |
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| CN116364481A (en) | 2023-06-30 |
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