CN113410099A - Relay control circuit - Google Patents
Relay control circuit Download PDFInfo
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- CN113410099A CN113410099A CN202110644435.XA CN202110644435A CN113410099A CN 113410099 A CN113410099 A CN 113410099A CN 202110644435 A CN202110644435 A CN 202110644435A CN 113410099 A CN113410099 A CN 113410099A
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- 230000000087 stabilizing effect Effects 0.000 claims description 31
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 18
- 239000003381 stabilizer Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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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
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
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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
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/36—Relay coil or coils forming part of a bridge circuit
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- Relay Circuits (AREA)
Abstract
The utility model provides a relay control circuit, including drive power supply, drive major loop, switch element, afterflow branch road and steady voltage unit, the drive major loop is including series connection's current-limiting resistance and relay coil, the switch element with drive major loop series connection is in between drive power supply and the earthing terminal, the drive major loop with afterflow branch road parallel connection, current-limiting resistance with relay coil's common port is connected the first end of steady voltage unit, the second end of steady voltage unit is connected the earthing terminal. The application provides a relay control circuit can satisfy simultaneously and provide sufficient instantaneous current, keep less continuous current and accelerate the energy consumption of relay coil when the relay breaks off after the relay actuation.
Description
Technical Field
The application relates to the technical field of relays, in particular to a relay control circuit.
Background
In a general traditional relay control circuit, a freewheeling diode is connected in parallel with a relay coil, so that the phenomena of switch device breakdown, contact sparking and the like caused by higher induction voltage due to sudden reduction of current without a freewheeling loop when a switch device for controlling power supply is turned off are prevented. The commonly used relay control circuit has higher requirement on the breaking speed of the relay RY contact point in control in certain application occasions. But adding a freewheeling diode increases the turn-off time of the relay contacts. In another conventional relay control circuit, a freewheeling diode and a transient diode TVS are connected in series in parallel with a relay coil, so that the relay breaking speed can be increased.
The characteristic of the relay is that the pull-in current is larger than the release current; the holding current is smaller than the pull-in current and larger than the release current. Meanwhile, the power supply wiring harness between the relay and the control board is usually long, and the relay is easy to be interfered by an external key to cause misoperation. Therefore, in addition to the problem of relay coil energy release and the problem of relay release time, the energy consumption problem and the anti-interference problem of the relay need to be considered.
Disclosure of Invention
The application provides a relay control circuit can improve relay coil energy release problem, relay release time problem and the energy consumption problem of relay.
The application provides a relay control circuit, specifically, relay control circuit includes: the driving circuit comprises a driving power supply, a driving main loop, a switching unit, a follow current branch and a voltage stabilizing unit. Wherein: the driving main loop comprises a current-limiting resistor and a relay coil which are connected in series, the switch unit and the driving main loop are connected between the driving power supply and a grounding terminal in series, the driving main loop is connected with the follow current branch in parallel, the common end of the current-limiting resistor and the relay coil is connected with the first end of the voltage stabilizing unit, and the second end of the voltage stabilizing unit is connected with the grounding terminal.
Optionally, the freewheeling branch in the relay control circuit includes a diode, the current-limiting resistor includes a first resistor, the voltage-stabilizing unit includes a first voltage-stabilizing element, a first end of the first resistor is connected to the driving power supply, a second end of the first resistor is connected to a first end of the relay coil, a second end of the relay coil is connected to the ground terminal, an anode of the diode is connected to a second end of the relay coil, and a cathode of the diode is connected to the first end of the first resistor; the first voltage stabilizing part is connected between the second end of the first resistor and the grounding end; and/or the current-limiting resistor comprises a second resistor, the voltage-stabilizing unit comprises a second voltage-stabilizing piece, the first end of the relay coil is connected with the driving power supply, the first end of the second resistor is connected with the second end of the relay coil, the second end of the second resistor is connected with the grounding end, the negative electrode of the diode is connected with the first end of the relay coil, the positive electrode of the diode is connected with the second end of the second resistor, and the second voltage-stabilizing piece is connected between the first end of the second resistor and the grounding end.
Optionally, the freewheeling branch in the relay control circuit further includes an energy-absorbing unit, and the energy-absorbing unit is connected in series with the diode.
Optionally, the energy absorption unit in the relay control circuit is selected from at least one of a resistor and a zener diode.
Optionally, the first voltage stabilizer in the relay control circuit is selected from at least one of a regulated power supply with a switch and a regulated capacitor.
Optionally, the relay control circuit further includes a third resistor connected in series with the switch unit, the third resistor being connected between the driving power supply and the driving main loop, and/or the relay control circuit further includes a fourth resistor connected in series with the switch unit, the fourth resistor being connected between the ground terminal and the driving main loop.
Optionally, the switch unit in the relay control circuit includes a first switch, a first end of the first switch is connected to the driving power supply, and a second end of the first switch is connected to the driving main loop; and/or the switch unit comprises a second switch piece, the first end of the second switch piece is connected with the driving main loop, and the second end of the second switch piece is connected with the grounding end.
Optionally, the switch unit in the relay control circuit is selected from at least one of a MOS transistor, a triode, and a switch chip.
Optionally, the relay control circuit further includes an anti-jamming unit, and the anti-jamming unit is disposed at the first end of the relay coil and/or the second end of the relay coil.
Optionally, the interference rejection unit in the relay control circuit is selected from at least one of a magnetic bead, a common mode inductor, a differential mode inductor, and a Y capacitor.
As described above, the relay control circuit provided by the application can simultaneously meet the requirements of providing enough instantaneous current when the relay is attracted, keeping smaller continuous current after the relay is attracted and accelerating the energy consumption of the relay coil when the relay is disconnected.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a first circuit schematic diagram of a relay control circuit according to an embodiment of the present application.
Fig. 2 is a second circuit schematic diagram of a relay control circuit according to another embodiment of the present application.
Fig. 3 is a first circuit diagram of a relay control circuit according to an embodiment of the present application.
Fig. 4 is a circuit diagram ii of a relay control circuit according to another embodiment of the present application.
Fig. 5 is a third schematic circuit diagram of a relay control circuit according to another embodiment of the present application.
Fig. 6 is a fourth schematic circuit diagram of a relay control circuit according to another embodiment of the present application.
Fig. 7 is a fifth schematic circuit diagram of a relay control circuit according to another embodiment of the present application.
Fig. 8 is a circuit diagram of a relay coil according to an embodiment of the present application.
Fig. 9 is a third circuit diagram of a relay control circuit according to another embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings. With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of an element by the phrase "comprising an … …" does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element, and further, where similarly-named elements, features, or elements in different embodiments of the disclosure may have the same meaning, or may have different meanings, that particular meaning should be determined by their interpretation in the embodiment or further by context with the embodiment.
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Fig. 1 is a first circuit schematic diagram of a relay control circuit according to an embodiment of the present application.
Referring to fig. 1, in an embodiment, a relay control circuit includes: the driving circuit comprises a driving power supply 10, a driving main loop 20, a switching unit 30, a freewheeling branch 40 and a voltage stabilizing unit 50. Those skilled in the art will appreciate that the relay control circuit configuration shown in fig. 1 does not constitute a limitation of the relay control circuit, which may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
The following describes the components and the operation principle of the relay control circuit in detail with reference to fig. 1:
as shown in fig. 1, in one embodiment, the drive main circuit 20 includes a current limiting resistor 21 and a relay coil 22 connected in series. The switching unit 30 is connected in series with the driving main circuit 20 between the driving power source 10 and the ground. Wherein, the current limiting resistor 21 is connected to one side of the relay coil 22 close to the driving power supply 10; and/or, the current limiting resistor 21 may be connected to the side of the relay coil 22 close to the ground.
It is to be understood that the switching unit 30 may be connected to a side of the relay coil 22 adjacent to the driving power source 10; and/or, may be connected to the side of the relay coil 22 near the ground. With continued reference to fig. 1, in one embodiment, a current limiting resistor 21 is connected in series between the switching unit 30 and the relay coil 22.
The drive main circuit 20 is connected in parallel with the freewheel branch 40. The common end of the current limiting resistor 21 and the relay coil 22 is connected to a first end of the voltage stabilizing unit 50, and a second end of the voltage stabilizing unit 50 is connected to the ground end. It is to be understood that the voltage stabilization unit 50 may be connected to a side of the relay coil 22 close to the driving power source 10; and/or, the voltage stabilizing unit 50 may be connected to a side of the relay coil 22 close to the ground terminal.
When the voltage stabilizing unit 50 is connected to the side of the relay coil 22 close to the driving power source 10, the voltage stabilizing unit 50 may select at least one of a power source with a switch and a capacitor. Before the relay is closed, the voltage stabilizing unit 50 is charged to the power supply voltage, and the voltage stabilizing unit 50 supplies power to the relay at the closing moment of the relay so as to ensure the current required by closing. After the relay is closed, the current of the power supply coil is limited by the current limiting resistor 21 in the driving main loop 20, and the power supply current of the relay which keeps the closed state is limited to a smaller state. When the relay is turned off, the relay coil 22 and the follow current unit 40 are conducted to form a follow current loop, the current limiting resistor 21 can absorb follow current energy formed by induction voltage, the current of the relay coil 22 is accelerated to be rapidly reduced to release current, and therefore the breaking speed of the relay is accelerated.
Fig. 2 is a second circuit schematic diagram of a relay control circuit according to another embodiment of the present application.
Referring to fig. 2, in another embodiment, the driving main circuit 20 includes a current limiting resistor 21 and a relay coil 22 connected in series, and the switching unit 30 and the driving main circuit 20 are connected in series between the driving power source 10 and the ground, wherein the current limiting resistor 21 is connected in series between the relay coil 22 and the ground. The driving main circuit 20 is connected in parallel with the freewheeling branch 40, a common terminal of the current limiting resistor 21 and the relay coil 22 is connected to a first terminal of the voltage stabilizing unit 50, and a second terminal of the voltage stabilizing unit 50 is connected to the ground terminal.
When the capacitor is connected as the voltage stabilizing unit 50 to the side of the relay coil 22 close to the ground terminal, the voltage stabilizing unit 50 is equivalent to directly connecting the relay coil 22 to the ground terminal when the relay is closed, so as to ensure the current required for closing. After the relay is closed, the current of the power supply coil is limited by the current limiting resistor 21 in the driving main loop 20, and the power supply current of the relay which keeps the closed state is limited to a smaller state. When the relay is turned off, the relay coil 22 and the follow current unit 40 are conducted to form a follow current loop, the current limiting resistor 21 can absorb follow current energy formed by induction voltage, the current of the relay coil 22 is accelerated to be rapidly reduced to release current, and therefore the breaking speed of the relay is accelerated.
Fig. 3 is a first circuit diagram of a relay control circuit according to an embodiment of the present application.
Referring to fig. 3, in an embodiment, the freewheel 40 of the relay control circuit includes a diode D, the current limiting resistor 21 includes a first resistor R1, the voltage stabilizing unit 50 includes a first voltage stabilizer X1, and the switch unit 30 includes a high-side switch K1. It should be noted that, in another embodiment, the switch unit 30 may also include a low-side switch.
The high-side switch K1 is connected between the voltage terminal U of the driving power source 10 and the first terminal of the first resistor R1. The second end of the first resistor R1 is connected to the first end of the relay coil 22, the second end of the relay coil 22 is connected to ground, the anode of the diode D is connected to the second end of the relay coil 22, and the cathode of the diode D is connected to the first end of the first resistor R1. The first voltage stabilizer X1 is connected between the second terminal of the first resistor R1 and ground.
In the present embodiment, when the first voltage stabilizer X1 is connected to the side of the relay coil 22 close to the driving power source 10, the first voltage stabilizer X1 may select at least one of a stabilized voltage power source with a switch and a stabilized voltage capacitor. Before the relay is pulled in, the voltage stabilizing capacitor is charged to the power supply voltage and/or is directly powered by the voltage stabilizing power supply, and the first voltage stabilizing piece X1 supplies power to the relay at the moment of pulling in the relay so as to ensure the current required by pulling in. After the relay is attracted, the current is limited by the first resistor R1, and the power supply current of the relay keeping the attraction state is limited to be in a smaller state. When the relay is turned off, the diode D is conducted to form a follow current loop under the drive of the induced voltage of the relay coil 22, the first resistor R1 can absorb the follow current energy formed by the induced voltage, the current of the relay coil 22 is quickly reduced to the release current, and the breaking speed of the relay is accelerated.
Fig. 4 is a circuit diagram ii of a relay control circuit according to another embodiment of the present application.
Referring to fig. 4, in an embodiment, the freewheel 40 of the relay control circuit includes a diode D, the current limiting resistor 21 includes a second resistor R2, the voltage stabilizing unit 50 includes a second voltage stabilizer X2, and the switch unit 30 includes a high-side switch K1. It should be noted that, in another embodiment, the switch unit may also include a low-side switch.
The high-side switch K1 is connected between the voltage terminal U of the drive power supply 10 and the first terminal of the relay coil 22. A first end of the second resistor R2 is connected to the second end of the relay coil 22, and a second end of the second resistor R2 is connected to the ground. The cathode of the diode D is connected to the first end of the relay coil 22, and the anode of the diode D is connected to the second end of the second resistor R2. The second voltage stabilizer X2 is connected between the first terminal of the second resistor R2 and ground.
In the present embodiment, the second voltage stabilizer X2 may be selected from a capacitor. In the case where the capacitor is connected as the voltage stabilizing unit 50 to the side of the relay coil 22 close to the ground terminal, the second voltage stabilizing member X2 is equivalent to directly connecting the relay coil 22 to the ground terminal when the relay is pulled in, so as to ensure the current required for pulling in. After the relay is pulled in, the current of the power supply coil is limited by the second resistor R2, and the power supply current of the relay which keeps the pull-in state is limited to be in a smaller state. When the relay is turned off, the relay coil 22 and the diode D are conducted to form a follow current loop, the second resistor R2 can absorb follow current energy formed by the induction voltage, the current of the relay coil 22 is quickly reduced to release current, and therefore the breaking speed of the relay is accelerated.
In one embodiment, the freewheeling branch in the relay control circuit further includes an energy-absorbing unit. The energy absorption unit is connected with the diode in series. The energy absorption unit can be at least one selected from a resistor and a voltage stabilizing diode.
Fig. 5 is a third schematic circuit diagram of a relay control circuit according to another embodiment of the present application.
Referring to FIG. 5 in conjunction with FIGS. 1 and 3, in one embodiment, the energy-absorbing unit includes a fifth resistor R5 and a zener diode D1. The second end of the fifth resistor R5 is grounded, the first end of the fifth resistor R5 is connected to the cathode of the zener diode D1, the anode of the zener diode D1 is connected to the anode of the diode D, and the cathode of the diode D is connected to the first end of the current limiting resistor 21. In another embodiment, the energy-absorbing unit can also be connected in series with the cathode of the diode D.
In the embodiment, the fifth resistor R5 and/or the zener diode D1 in the energy absorption unit can absorb energy during the conduction period of the diode D, so as to rapidly reduce the current of the relay coil 22 to the release current, thereby accelerating the breaking speed of the relay.
In this embodiment, constant voltage power supply and voltage stabilizing capacitor homoenergetic play storage electric energy and filtering action, can provide stable voltage when guaranteeing the relay actuation.
Fig. 6 is a fourth schematic circuit diagram of a relay control circuit according to another embodiment of the present application.
Referring to fig. 6, and referring to fig. 1 and 3, in an embodiment, the relay control circuit further includes a third resistor R3 connected in series with the switch unit 30. The third resistor R3 is connected between the driving power source 10 and the driving main circuit 20. And/or, the relay control circuit further includes a fourth resistor R4 connected in series with the switching unit 30, the fourth resistor R4 being connected between the ground and the driving main circuit 20.
In this embodiment, the third resistor R3 and the fourth resistor R4 can limit the current flowing through the relay coil 22, reduce power consumption during the period when the relay maintains pull-in, and protect the relay control circuit.
Fig. 7 is a fifth schematic circuit diagram of a relay control circuit according to another embodiment of the present application.
Referring to fig. 7, in an embodiment, the switch unit 30 in the relay control circuit includes a first switch device S1, a first terminal of the first switch device S1 is connected to the driving power source 10, and a second terminal of the first switch device S1 is connected to the driving main circuit 20, so as to form a high-side control. And/or, the switch unit 30 includes a second switch device S2, a first terminal of the second switch device S2 is connected to the driving main circuit 20, and a second terminal of the second switch device S2 is connected to the ground terminal, so as to form a low-side control.
In an embodiment, the switch unit 30 in the relay control circuit may be at least one selected from a MOS transistor, a triode, and a switch chip.
The two states of the relay can be controlled to be closed and opened through the switch unit 30 by high-side control, low-side control or double-side control.
In an embodiment, the relay control circuit further comprises a tamper resistant unit, which may be arranged at the first and/or second end of the relay coil 22.
Fig. 8 is a circuit diagram of a relay coil according to an embodiment of the present application.
Referring to fig. 8, in one embodiment, the tamper resistant unit includes a first tamper resistant element Z1. The first interference suppression element Z1 is disposed at a first end of the relay coil 22. And/or the anti-interference unit also comprises a second anti-interference element Z2. A second anti-interference element Z2 is provided at the second end of the relay coil 22.
In the embodiment, in the relay state maintaining process, for example, the closed state is maintained, or for example, the open state is maintained, the interference impact in the relay control wiring harness can be absorbed by the anti-interference unit, the non-control transient of the relay state is avoided, and the relay can be effectively prevented from being transited from the closed state to the open state, or from the open state to the closed state, or from being switched back and forth between the two states.
In one embodiment, the interference rejection unit in the relay control circuit is selected from at least one of a magnetic bead, a common mode inductor, a differential mode inductor and a Y capacitor.
Fig. 9 is a third circuit diagram of a relay control circuit according to another embodiment of the present application.
Referring to fig. 9, in an embodiment, the relay control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a relay coil 22, a first anti-interference element Z1, a second anti-interference element Z2, a first switch S1, a second switch S2, a diode D, and a zener diode D1.
The first switching device S1, the third resistor R3, the first resistor R1, the relay coil 22, the second resistor R2, the fourth resistor R4, and the second switching device S2 are sequentially connected between the voltage terminal U of the driving power supply 10 and the ground terminal.
Referring to fig. 9, the second end of the fifth resistor R5 is connected to the common end of the second resistor R2 and the fourth resistor R4, the first end of the fifth resistor R5 is connected to the cathode of the zener diode D1, the anode of the zener diode D1 is connected to the anode of the diode D, and the cathode of the diode D is connected to the common end of the first resistor R1 and the third resistor R3.
The first stabilizer X1 is connected between the common terminal of the first resistor R1 and the relay coil 22 and the ground, and the second stabilizer X2 is connected between the common terminal of the second resistor R2 and the relay coil 22 and the ground.
The first interference rejection element Z1 is disposed at a first end of the relay coil 22 and the second interference rejection element Z2 is disposed at a second end of the relay coil 22. For the working principle of each element in the circuit, please refer to the above embodiments, which are not described herein again.
As described above, the relay control circuit provided by the application can simultaneously meet the requirements of providing enough instantaneous current when the relay is attracted, keeping smaller continuous current after the relay is attracted and accelerating the energy consumption of the relay coil when the relay is disconnected.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. The relay control circuit is characterized by comprising a driving power supply, a driving main loop, a switch unit, a follow current branch and a voltage stabilizing unit, wherein the driving main loop comprises a current limiting resistor and a relay coil which are connected in series, the switch unit and the driving main loop are connected between the driving power supply and a ground terminal in series, the driving main loop is connected with the follow current branch in parallel, the common end of the current limiting resistor and the relay coil is connected with the first end of the voltage stabilizing unit, and the second end of the voltage stabilizing unit is connected with the ground terminal.
2. The relay control circuit according to claim 1, wherein the freewheeling branch includes a diode, the current limiting resistor includes a first resistor, the voltage stabilizing unit includes a first voltage stabilizing element, a first end of the first resistor is connected to the driving power source, a second end of the first resistor is connected to a first end of the relay coil, a second end of the relay coil is connected to the ground terminal, an anode of the diode is connected to a second end of the relay coil, and a cathode of the diode is connected to the first end of the first resistor; the first voltage stabilizing part is connected between the second end of the first resistor and the grounding end; and/or the current-limiting resistor comprises a second resistor, the voltage-stabilizing unit comprises a second voltage-stabilizing piece, the first end of the relay coil is connected with the driving power supply, the first end of the second resistor is connected with the second end of the relay coil, the second end of the second resistor is connected with the grounding end, the negative electrode of the diode is connected with the first end of the relay coil, the positive electrode of the diode is connected with the second end of the second resistor, and the second voltage-stabilizing piece is connected between the first end of the second resistor and the grounding end.
3. The relay control circuit of claim 2, wherein the freewheel leg further comprises an energy-absorbing unit connected in series with the diode.
4. The relay control circuit of claim 3, wherein the energy absorbing unit is selected from at least one of a resistor and a zener diode.
5. The relay control circuit of claim 2, wherein the first voltage regulator is selected from at least one of a switched regulated power supply and a regulated capacitor.
6. The relay control circuit according to claim 1, further comprising a third resistor connected in series with the switching unit, the third resistor being connected between the driving power source and the driving main circuit, and/or further comprising a fourth resistor connected in series with the switching unit, the fourth resistor being connected between the ground terminal and the driving main circuit.
7. The relay control circuit according to claim 1, wherein the switching unit includes a first switching piece, a first end of which is connected to the driving power source, and a second end of which is connected to the driving main circuit; and/or the switch unit comprises a second switch piece, the first end of the second switch piece is connected with the driving main loop, and the second end of the second switch piece is connected with the grounding end.
8. The relay control circuit of claim 1, wherein the switching unit is selected from at least one of a MOS transistor, a triode, and a switching chip.
9. The relay control circuit according to any of claims 1-8, further comprising an interference rejection unit disposed at the first end of the relay coil and/or the second end of the relay coil.
10. The relay control circuit of any of claim 9, wherein the interference rejection unit is selected from at least one of a magnetic bead, a common mode inductor, a differential mode inductor, and a Y capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110644435.XA CN113410099A (en) | 2021-06-09 | 2021-06-09 | Relay control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110644435.XA CN113410099A (en) | 2021-06-09 | 2021-06-09 | Relay control circuit |
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| CN113410099A true CN113410099A (en) | 2021-09-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695018A (en) * | 2022-05-30 | 2022-07-01 | 苏州联讯仪器有限公司 | Method, circuit, device and medium for reducing leakage current of relay |
| WO2024088054A1 (en) * | 2022-10-27 | 2024-05-02 | 厦门宏发电力电器有限公司 | Relay, control device and control circuit module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020041478A1 (en) * | 2000-10-11 | 2002-04-11 | Kazuo Kanomata | Circuit for driving a solenoid |
| JP2007294226A (en) * | 2006-04-25 | 2007-11-08 | Toyota Industries Corp | Relay driving circuit |
| CN201918318U (en) * | 2011-01-24 | 2011-08-03 | 李喜通 | Relay electricity-saving controller capable of expanding load capacity |
| CN109559934A (en) * | 2019-01-21 | 2019-04-02 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN112017910A (en) * | 2020-07-28 | 2020-12-01 | 固德威电源科技(广德)有限公司 | Relay drive circuit and power equipment applying same |
-
2021
- 2021-06-09 CN CN202110644435.XA patent/CN113410099A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020041478A1 (en) * | 2000-10-11 | 2002-04-11 | Kazuo Kanomata | Circuit for driving a solenoid |
| JP2007294226A (en) * | 2006-04-25 | 2007-11-08 | Toyota Industries Corp | Relay driving circuit |
| CN201918318U (en) * | 2011-01-24 | 2011-08-03 | 李喜通 | Relay electricity-saving controller capable of expanding load capacity |
| CN109559934A (en) * | 2019-01-21 | 2019-04-02 | 广东美的制冷设备有限公司 | Relay drive circuit and air conditioner |
| CN112017910A (en) * | 2020-07-28 | 2020-12-01 | 固德威电源科技(广德)有限公司 | Relay drive circuit and power equipment applying same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695018A (en) * | 2022-05-30 | 2022-07-01 | 苏州联讯仪器有限公司 | Method, circuit, device and medium for reducing leakage current of relay |
| WO2024088054A1 (en) * | 2022-10-27 | 2024-05-02 | 厦门宏发电力电器有限公司 | Relay, control device and control circuit module |
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Application publication date: 20210917 |