CN211236641U - Low-power-consumption circuit for controlling relay - Google Patents
Low-power-consumption circuit for controlling relay Download PDFInfo
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- CN211236641U CN211236641U CN202020102324.7U CN202020102324U CN211236641U CN 211236641 U CN211236641 U CN 211236641U CN 202020102324 U CN202020102324 U CN 202020102324U CN 211236641 U CN211236641 U CN 211236641U
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Abstract
The utility model discloses a control relay low-power consumption circuit is applied to vehicle mounted power, control relay low-power consumption circuit, include: the circuit comprises a first electronic switch, a second electronic switch, a first resistor, a relay, a first switch control module and a second switch control module; the first end of the first electronic switch is respectively connected with the first end of the first resistor and the power supply, and the second end of the first electronic switch is respectively connected with the second end of the first resistor and the first end of the coil of the relay; the first end of the second electronic switch is connected with the second end of the coil of the relay, and the second end of the second electronic switch is grounded; the first switch control module is used for controlling the on-off state of the first electronic switch, and the second switch control module is used for controlling the on-off state of the second electronic switch. The on-off state of the electronic switch is controlled through the first switch control module and the second switch control module, so that the simplicity of low power consumption of the control relay is realized, and the reliability of a low power consumption relay circuit is also improved.
Description
Technical Field
The utility model relates to a motor control technical field has and relates to a control relay low-power consumption circuit.
Background
With the development of the switching power supply and the motor control technology, the power density of a single body is continuously improved, the capacity of a capacitor is continuously improved, and a relay circuit matched with a pre-charging circuit in a vehicle-mounted power supply is also generated.
The relay circuit generates current through a coil of the relay, and the functions of automatic adjustment, safety protection, circuit conversion and the like in various motor control circuits are realized. However, in an application scenario of a closed space or long-time work, the coil of the relay has a high temperature, so that the power at two ends of the coil exceeds the rated power, the service life of the relay is influenced, and the reliability of a relay circuit is also reduced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a control relay low-power consumption circuit not only realizes the simplicity of control relay low-power consumption, also improves the reliability of low-power consumption relay circuit.
In a first aspect, the embodiment of the utility model provides a control relay low-power consumption circuit is applied to vehicle mounted power, control relay low-power consumption circuit includes:
the circuit comprises a first electronic switch, a second electronic switch, a first resistor, a relay, a first switch control module and a second switch control module;
the first end of the first electronic switch is respectively connected with the first end of the first resistor and a power supply, and the second end of the first electronic switch is respectively connected with the second end of the first resistor and the first end of the coil of the relay;
the first end of the second electronic switch is connected with the second end of the coil of the relay, and the second end of the second electronic switch is grounded;
the first switch control module is used for controlling the on-off state of the first electronic switch, and the second switch control module is used for controlling the on-off state of the second electronic switch.
In one possible example, the first electronic switch comprises a first transistor; the base electrode of the first triode is connected with the first switch control module; and the emitting electrode of the first triode is respectively connected with the first end of the first resistor and the power supply, and the collecting electrode of the first triode is respectively connected with the second end of the first resistor and the first end of the coil of the relay.
In one possible example, the first switch control module comprises a second resistor, a first diode, a first capacitor, a third resistor and a second triode; the first end of the second resistor is connected with the base electrode of the first triode, and the second end of the second resistor is connected with the collector electrode of the second triode; the anode of the first diode is connected with the second end of the coil of the relay, and the cathode of the first diode is respectively connected with the first end of the first capacitor and the first end of the third resistor; and the base electrode of the second triode is connected with the second end of the third resistor, and the emitting electrode of the second triode is respectively connected with the second end of the first capacitor and the second end of the second electronic switch.
In one possible example, the second electronic switch comprises a third transistor; the base electrode of the third triode is connected with the second switch control module; and the collector electrode of the third triode is connected with the second end of the coil of the relay, and the emitter electrode of the third triode is grounded.
In one possible example, the second switch control module includes a first signal controller, a fourth resistor, and a fifth resistor; a first end of the fourth resistor is connected with the first signal controller, and a second end of the fourth resistor is respectively connected with a base electrode of the third triode and a first end of the fifth resistor; and the second end of the fifth resistor is connected with the emitter of the third triode.
In one possible example, the second electronic switch comprises a first field effect transistor; the grid electrode of the first field effect transistor is connected with the second switch control module; the drain electrode of the first field effect transistor is connected with the second end of the coil of the relay, and the source electrode of the first field effect transistor is grounded.
In one possible example, the second switch control module includes a second signal controller, a sixth resistor, a seventh resistor, an eighth resistor, and a second diode; a first end of the sixth resistor is connected with the second signal controller, and a second end of the sixth resistor is respectively connected with a grid electrode of the first field effect transistor and a first end of the seventh resistor; the anode of the second diode is connected with the second end of the seventh resistor, and the cathode of the second diode is connected with the first end of the sixth resistor; the first end of the eighth resistor is connected with the grid electrode of the first field effect transistor, and the second end of the eighth resistor is connected with the source electrode of the first field effect transistor.
In one possible example, the second switch control module includes a third signal controller, a ninth resistor, a third diode, a fourth transistor, a tenth resistor, and an eleventh resistor; a first end of the ninth resistor is connected with the third signal controller, and a second end of the ninth resistor is connected with a base electrode of the fourth triode; the anode of the third diode is connected with the second end of the ninth resistor, and the cathode of the third diode is respectively connected with the first end of the tenth resistor and the gate of the first field effect transistor; an emitter of the fourth triode is connected with the second end of the tenth resistor, and a collector of the fourth triode is grounded; the first ends of the eleventh resistors are respectively connected with the cathodes of the third diodes, and the second ends of the eleventh resistors are connected with the source electrode of the first field effect transistor.
In one possible example, the first electronic switch comprises a second field effect transistor; the grid electrode of the second field effect transistor is connected with the first switch control module; and the source electrode of the second field effect transistor is respectively connected with the first end of the first resistor and the power supply, and the drain electrode of the second field effect transistor is respectively connected with the second end of the first resistor and the first end of the coil of the relay.
It can be seen that the embodiment of the utility model provides a control relay low-power consumption circuit that depicts, the on-off state through first electronic switch of first switch control module group control to and the on-off state of second electronic switch is controlled to second switch control module group. Because the power consumed by the relay when the first electronic switch is on and the second electronic switch is off is less than the power consumed by the relay when the first electronic switch is on and the second electronic switch is on, the power consumption of the relay can be flexibly and simply controlled, and the relay is ensured to be in lower power consumption. Meanwhile, the reduction of the power consumed by the relay reduces the temperature of the coil of the relay, thereby not only being beneficial to prolonging the service life of the relay, but also being beneficial to improving the reliability of a relay circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a low power consumption circuit of a control relay according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a low power consumption circuit of a second control relay according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a low-power consumption circuit of a third control relay according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth low-power-consumption circuit for a control relay according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, circuit or apparatus that comprises a list of steps or elements is not limited to those listed, but may alternatively include other steps or elements not listed, or inherent to such process, system, circuit or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a low power consumption circuit for controlling a relay according to an embodiment of the present invention. The low-power consumption circuit for controlling the relay comprises: a first electronic switch S1, a resistor R1, a relay K1, a second electronic switch S2, a first switch control module 110, and a second switch control module 120. A first end of the first electronic switch S1 is connected to a first end of the first resistor R1 and the power supply VCC, respectively, and a second end of the first electronic switch S1 is connected to a second end of the first resistor R1 and a first end of the coil of the relay K1, respectively; the first end of the second electronic switch S2 is connected with the second end of the coil of the relay K1, and the second end of the second electronic switch S2 is grounded to the ground GND; the first switch control module 110 is used for controlling the on-off state of the first electronic switch S1, and the second switch control module 120 is used for controlling the on-off state of the second electronic switch S2.
Specifically, when the second switch control module 120 controls the second electronic switch S1 to be turned off, the circuit in which the relay K1 is located cannot form a loop, no current passes through the coil of the relay K1, and the relay K1 is in a hold state.
Specifically, when the first switch control module 110 controls the first electronic switch S1 to be turned on and the second switch control module 120 controls the second electronic switch S1 to be turned on, the power VCC is applied to both ends of the coil of the relay K1, and a certain current flows through the coil, thereby generating an electromagnetic effect. The armature of the relay K1 overcomes the pulling force of the return spring to be attracted to the iron core under the action of the electromagnetic effect, the movable contact and the fixed contact of the armature are driven to be attracted, and at the moment, the relay K1 is in a first working state.
Specifically, when the first switch control module 110 controls the first electronic switch S1 to be turned on and the second switch control module 120 controls the second electronic switch S2 to be turned off, the power VCC is applied to both ends of the coil of the relay K1 and the resistor R1 connected in series with the relay K1, and a certain current flows through the coil, thereby generating an electromagnetic effect. The armature of the relay K1 overcomes the pulling force of the return spring to be attracted to the iron core under the action of the electromagnetic effect, the movable contact and the fixed contact of the armature are driven to be attracted, at the moment, the relay K1 is in a second working state, and the power consumed by the relay K1 in the second working state is smaller than the power consumed in the first working state.
In one possible example, the first electronic switch S1 includes a transistor, a base b of the transistor is connected to the first switch control module 110, an emitter e of the transistor is respectively connected to the first terminal of the resistor R1 and the power source VCC, and a collector c of the transistor is respectively connected to the second terminal of the resistor R1 and the first terminal of the coil of the relay K1. When the first switch control module 110 applies a low voltage to the base b of the transistor and ensures that the emitter e of the transistor is at a higher potential than the base b of the transistor, the transistor is in a conducting state.
In one possible example, the first electronic switch S1 includes a field effect transistor having a gate G connected to the first switch control module 110, a source S connected to the first terminal of the first resistor R1 and the power source VCC, respectively, and a drain D connected to the second terminal of the first resistor R1 and the first terminal of the coil of the relay K1, respectively. When the first switch control module 110 applies a low voltage to the gate G of the field effect transistor and ensures that the potential of the source G of the field effect transistor is higher than the potential of the gate G of the field effect transistor, the field effect transistor is in a conducting state.
In one possible example, the second electronic switch S2 includes a transistor, a base b of which is connected to the second switch control module 120, a collector c of which is connected to the second end of the coil of the relay K1, and an emitter e of which is connected to the ground GND. When the second switch control module 120 applies a low voltage to the base b of the transistor and ensures that the potential of the emitter e of the transistor is higher than the potential of the base b of the transistor, the transistor is in a conducting state.
In one possible example, the second electronic switch S2 includes a field effect transistor, a gate G of which is connected to the second switch control module 120, a drain D of which is connected to the second terminal of the coil K1 of the relay, and a source S of which is grounded to the GND. When the second switch control module 120 applies a low voltage to the gate G of the field effect transistor and ensures that the potential of the source G of the field effect transistor is higher than the potential of the gate G of the field effect transistor, the field effect transistor is in a conducting state.
It can be seen that the control relay low power consumption circuit described in the embodiment of the present invention controls the on/off state of the first electronic switch S1 through the first switch control module 110, and controls the on/off state of the second electronic switch S2 through the second switch control module 120. Because the power consumed by the relay when the first electronic switch is on and the second electronic switch is off is less than the power consumed by the relay when the first electronic switch is on and the second electronic switch is on, the power consumption of the relay can be flexibly and simply controlled, and the relay is ensured to be in lower power consumption. Meanwhile, the reduction of the power consumed by the relay reduces the temperature of the coil of the relay, thereby not only being beneficial to prolonging the service life of the relay, but also being beneficial to improving the reliability of a relay circuit.
The first electronic switch S1, the second electronic switch S2, the first switch control module 110, and the second switch control module 120 in fig. 1 may be composed of specific circuit elements and circuit modules, which will be described in detail below.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second low power consumption circuit for controlling a relay according to an embodiment of the present invention. The low-power consumption circuit for controlling the relay comprises: the circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a relay K1, a triode Q1, a triode Q2, a triode Q3, a diode D1 and a capacitor C1. It can be seen that the first electronic switch S1 includes a transistor Q1, the second electronic switch S2 includes a transistor Q3, the first switch control module 110 includes a circuit module consisting of a resistor R2, a resistor R3, a diode D1, a capacitor C1 and the transistor Q2, and the second switch control module 120 includes a circuit module consisting of a first signal controller CTR1, a resistor R4 and a resistor R5.
Specifically, an emitter e of the triode Q1 is respectively connected to a power supply VCC and a first end of the resistor R1, a collector c of the triode Q1 is respectively connected to a second end of the resistor R2 and a first end of the relay K1, and a base b of the triode Q1 is connected to a first end of the resistor R2; a base electrode b of the triode Q2 is connected with a first end of the resistor R3, a collector electrode C of the triode Q2 is connected with a second end of the resistor R2, and an emitter electrode e of the triode Q2 is respectively connected with a first end of the capacitor C1 and an emitter electrode e of the triode Q3; a collector c of the triode Q3 is respectively connected with the second end of the relay K1 and the anode of the diode D1, a base b of the triode Q3 is respectively connected with the first end of the resistor R4 and the first end of the resistor R5, and an emitter e of the triode Q3 is respectively connected with the second end of the resistor R5 and the ground terminal GND; a second end of the capacitor C1 is connected to a cathode of the diode D1 and a second end of the resistor R3, respectively, and a first end of the capacitor C1 is connected to an emitter e of the transistor Q3; the first end of the resistor R4 is respectively connected with the base b of the triode Q3 and the first end of the resistor R5, and the second end of the resistor R4 is connected with the first signal controller CTR 1.
Specifically, first, when the power source VCC supplies a dc current and the first signal controller CTR1 has no level input, the transistor Q3 is in an off state, and the dc current charges the capacitor C1 through the resistor R1, the coil of the relay K1 and the diode D1, and the transistor Q2 and the transistor Q1 are sequentially turned on. Then, when the first signal controller CTR1 inputs a high level, the transistor Q3 is in a conducting state, and the power VCC is applied to both ends of the coil of the relay K1 through the conducting transistor Q1, thereby ensuring that the relay K1 completes the pull-in state. At this time, the turned-on transistor Q3 pulls the anode of the diode D1 down to the ground GND, which causes the diode D1 to turn off in the reverse direction, and the capacitor C1 discharges through the resistor R3, thereby ensuring that the transistor Q2 and the transistor Q1 are turned on continuously. Finally, transistor Q2 and transistor Q1 are sequentially turned off when the charge in capacitor C1 is insufficient to support transistor Q2 for continued conduction. At this time, the power source VCC is applied to both ends of the coil of the relay K1 through the resistor R1, reducing the voltage and current across the relay K1, and reducing the power consumed by the relay K1.
It can be seen that, compared with the circuit structure of fig. 1, the first switch control module 110 composed of the transistor Q2, the diode D1, the resistor R2, the resistor R3 and the capacitor C1 controls the conduction time of the transistor Q1, and the second switch control module 120 composed of the first signal controller CTR1, the resistor R4 and the resistor R5 controls the conduction state of the transistor Q3, so that the power consumption of the relay is reduced, and the reliability of the low-power-consumption relay circuit is further improved. In addition, by adjusting the capacitance of the capacitor C1, the expected conduction time of the triode Q2 can be obtained, and the driving requirements of relays with different specifications are met.
Further, compared with a circuit mode that a resistor is connected with a relay in series to directly reduce the power consumption of the relay, the control relay low-power-consumption circuit shown in fig. 2 can further improve the stability of relay pull-in and the reliability of the low-power-consumption relay circuit while realizing the low power consumption of the control relay. In addition, compared with the cost and volume increase and the limit of service life brought by the circuit mode of connecting the resistor and the electrolytic capacitor in parallel, the control relay low-power-consumption circuit shown in fig. 2 reduces the cost of the relay driving circuit and improves the reliability of the low-power-consumption relay circuit while reducing the power consumption of the relay.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a third low-power-consumption circuit for controlling a relay according to an embodiment of the present invention. The low-power consumption circuit for controlling the relay comprises: the circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R6, a resistor R7, a resistor R8, a relay K1, a triode Q1, a triode Q2, a field effect transistor Q4, a diode D1 and a capacitor C1. It can be seen that the first electronic switch includes a transistor Q1, the second electronic switch includes a field effect transistor Q4, the first switch control module 110 includes a circuit module composed of a resistor R2, a resistor R3, a diode D1, a capacitor C1, and a transistor Q2, and the second switch module 120 includes a circuit module composed of a second signal controller CTR2, a resistor R6, a resistor R7, a resistor R8, and a diode D1.
Specifically, an emitter e of the triode Q1 is respectively connected to a power supply VCC and a first end of the resistor R1, a collector c of the triode Q1 is respectively connected to a second end of the resistor R2 and a first end of the relay K1, and a base b of the triode Q1 is connected to a first end of the resistor R2; a base electrode b of the triode Q2 is connected with a first end of the resistor R3, a collector electrode C of the triode Q2 is connected with a second end of the resistor R2, and an emitter electrode e of the triode Q2 is respectively connected with a first end of the capacitor C1 and a source electrode S of the field effect transistor Q4; a drain electrode D of the field effect transistor Q4 is respectively connected with a second end of the relay K1 and an anode of the diode D1, a gate electrode G of the field effect transistor Q4 is respectively connected with a first end of the resistor R6, a first end of the resistor R7 and a first end of the resistor R8, and a source electrode S of the field effect transistor Q4 is respectively connected with a second end of the resistor R8 and a ground end GND; a second end of the capacitor C1 is respectively connected with a cathode of the diode D1 and a second end of the resistor R3, and a first end of the capacitor C1 is connected with a source S of the field effect transistor Q4; a first end of the resistor R6 is connected to the gate G of the field effect transistor Q4, a first end of the resistor R7 and a first end of the resistor R8, respectively, and a second end of the resistor R6 is connected to the second signal controller CTR and the cathode of the diode D2, respectively; a first terminal of the resistor R7 is connected to the first terminal of the resistor R6, the first terminal of the resistor R8, and the gate G of the field effect transistor Q4, respectively, and a second terminal of the resistor R7 is connected to the anode of the diode D2.
Specifically, as described in fig. 2, when the power source VCC supplies a dc current and the second signal controller CTR2 has no level input, the fet Q4 is in an off state, and the dc current charges the capacitor C1 through the resistor R1, the coil of the relay K1, and the diode D1, and the transistor Q2 and the transistor Q1 are sequentially turned on. Then, when the second signal controller CTR2 inputs a high level, the field effect transistor Q4 is in a conducting state, and the power VCC is applied to both ends of the coil of the relay K1 through the conducting triode Q1, thereby ensuring that the relay K1 completes the pull-in state. The power source VCC is applied across the coil of the relay K1 through the resistor R1, reducing the voltage and current across the relay K1 and reducing the power consumed by the relay K1.
It can be seen that, compared with fig. 2, in addition to obtaining the expected on-time of the transistor Q2 by adjusting the capacitance of the capacitor C1 and meeting the driving requirements of relays of different specifications, the second switch control module 120 composed of the second signal controller CTR2, the resistor R6, the resistor R7, the resistor R8 and the diode D1 can provide a path with as low impedance as possible for fast discharging the capacitance and voltage between the gate G and the source S of the field effect transistor Q4, so that the on-off time of the field effect transistor Q4 is reduced, and the loss during on-off is reduced, and finally, the low power consumption of the relay is controlled, and the reliability of the low power consumption relay circuit is further improved.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a fourth low power consumption circuit for controlling a relay according to an embodiment of the present invention. The low-power consumption circuit for controlling the relay comprises: the circuit comprises a triode Q1, a triode Q2, a field effect transistor Q4, a triode Q5, a relay K1, a resistor R1, a resistor R2, a resistor R3, a resistor R9, a resistor R10, a resistor R11, a diode D1, a diode D3 and a capacitor C1. It can be seen that the first electronic switch includes a transistor Q1, the second electronic switch includes a field effect transistor Q4, the first switch control module 110 includes a circuit module composed of a resistor R2, a resistor R3, a diode D1, a capacitor C1, and a transistor Q2, and the second switch module 120 includes a circuit module composed of a third signal controller CTR3, a resistor R9, a resistor R10, a resistor R11, a diode D3, and a transistor Q5.
Specifically, an emitter e of the triode Q1 is respectively connected to a power supply VCC and a first end of the resistor R1, a collector c of the triode Q1 is respectively connected to a second end of the resistor R2 and a first end of the relay K1, and a base b of the triode Q1 is connected to a first end of the resistor R2; a base electrode b of the triode Q2 is connected with a first end of the resistor R3, a collector electrode C of the triode Q2 is connected with a second end of the resistor R2, and an emitter electrode e of the triode Q2 is respectively connected with a first end of the capacitor C1 and a source electrode S of the field effect transistor Q4; a drain electrode D of the field effect transistor Q4 is respectively connected with a second end of the relay K1 and an anode of the diode D1, a gate electrode G of the field effect transistor Q4 is respectively connected with a cathode of the diode D3, a first end of the resistor R10 and a first end of the resistor R11, and a source electrode S of the field effect transistor Q4 is respectively connected with a second end of the resistor R11 and a ground end GND; a second end of the capacitor C1 is respectively connected with a cathode of the diode D1 and a second end of the resistor R3, and a first end of the capacitor C1 is connected with a source S of the field effect transistor Q4; an emitter e of the triode Q5 is connected with the second end of the resistor R10, a base b of the triode Q5 is respectively connected with an anode of the diode D3 and the first end of the resistor R9, and a collector c of the triode Q5 is grounded to a ground terminal GND; the first end of the resistor R9 is connected with the anode of the diode D3 and the base b of the transistor Q5, and the second end of the resistor R9 is connected with the third signal controller CTR 3.
Specifically, as shown in fig. 2, the first switch control module 110, which is composed of a transistor Q2, a diode D1, a resistor R2, a resistor R3 and a capacitor C1, controls the on-time of the transistor Q1, so that the power VCC is applied to two ends of the coil of the relay K1 through the resistor R1, the voltage and the current of the relay K1 are reduced, and the power consumed by the relay K1 is reduced.
It can be seen that, compared with fig. 3, the second switch control module 120 composed of the third signal controller CTR3, the resistor R9, the resistor R10, the resistor R11, the diode D3 and the transistor Q5 rapidly discharges the capacitance and the voltage between the gate G and the source S of the field effect transistor Q4 through the transistor Q5, further reduces the on-off time and the on-off loss of the field effect transistor Q4, and finally, not only reduces the power consumption of the relay circuit, but also further improves the reliability of the low power consumption circuit of the control relay.
The embodiment of the present invention provides a low power consumption circuit for a control relay, and the principle and implementation of the present invention are explained herein by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (9)
1. The utility model provides a control relay low-power consumption circuit, is applied to vehicle power supply, its characterized in that, control relay low-power consumption circuit includes:
the circuit comprises a first electronic switch, a second electronic switch, a first resistor, a relay, a first switch control module and a second switch control module;
the first end of the first electronic switch is respectively connected with the first end of the first resistor and a power supply, and the second end of the first electronic switch is respectively connected with the second end of the first resistor and the first end of the coil of the relay;
the first end of the second electronic switch is connected with the second end of the coil of the relay, and the second end of the second electronic switch is grounded;
the first switch control module is used for controlling the on-off state of the first electronic switch, and the second switch control module is used for controlling the on-off state of the second electronic switch.
2. The control relay low power consumption circuit of claim 1, wherein the first electronic switch comprises a first triode; the base electrode of the first triode is connected with the first switch control module; and the emitting electrode of the first triode is respectively connected with the first end of the first resistor and the power supply, and the collecting electrode of the first triode is respectively connected with the second end of the first resistor and the first end of the coil of the relay.
3. The control relay low power consumption circuit as claimed in claim 2, wherein the first switch control module comprises a second resistor, a first diode, a first capacitor, a third resistor and a second triode;
the first end of the second resistor is connected with the base electrode of the first triode, and the second end of the second resistor is connected with the collector electrode of the second triode;
the anode of the first diode is connected with the second end of the coil of the relay, and the cathode of the first diode is respectively connected with the first end of the first capacitor and the first end of the third resistor;
and the base electrode of the second triode is connected with the second end of the third resistor, and the emitting electrode of the second triode is respectively connected with the second end of the first capacitor and the second end of the second electronic switch.
4. The control relay low power consumption circuit of claim 1, wherein the second electronic switch comprises a third transistor; the base electrode of the third triode is connected with the second switch control module; and the collector electrode of the third triode is connected with the second end of the coil of the relay, and the emitter electrode of the third triode is grounded.
5. The control relay low power consumption circuit according to claim 4, wherein the second switch control module comprises a first signal controller, a fourth resistor and a fifth resistor;
a first end of the fourth resistor is connected with the first signal controller, and a second end of the fourth resistor is respectively connected with a base electrode of the third triode and a first end of the fifth resistor;
and the second end of the fifth resistor is connected with the emitter of the third triode.
6. The control relay low power consumption circuit of claim 1, wherein the second electronic switch comprises a first field effect transistor; the grid electrode of the first field effect transistor is connected with the second switch control module; the drain electrode of the first field effect transistor is connected with the second end of the coil of the relay, and the source electrode of the first field effect transistor is grounded.
7. The control relay low power consumption circuit according to claim 6, wherein the second switch control module comprises a second signal controller, a sixth resistor, a seventh resistor, an eighth resistor and a second diode;
a first end of the sixth resistor is connected with the second signal controller, and a second end of the sixth resistor is respectively connected with a grid electrode of the first field effect transistor and a first end of the seventh resistor;
the anode of the second diode is connected with the second end of the seventh resistor, and the cathode of the second diode is connected with the first end of the sixth resistor;
the first end of the eighth resistor is connected with the grid electrode of the first field effect transistor, and the second end of the eighth resistor is connected with the source electrode of the first field effect transistor.
8. The control relay low power consumption circuit according to claim 6, wherein the second switch control module comprises a third signal controller, a ninth resistor, a third diode, a fourth triode, a tenth resistor and an eleventh resistor;
a first end of the ninth resistor is connected with the third signal controller, and a second end of the ninth resistor is connected with a base electrode of the fourth triode;
the anode of the third diode is connected with the second end of the ninth resistor, and the cathode of the third diode is respectively connected with the first end of the tenth resistor and the gate of the first field effect transistor;
an emitter of the fourth triode is connected with the second end of the tenth resistor, and a collector of the fourth triode is grounded;
the first ends of the eleventh resistors are respectively connected with the cathodes of the third diodes, and the second ends of the eleventh resistors are connected with the source electrode of the first field effect transistor.
9. The control relay low power consumption circuit of claim 1, wherein the first electronic switch comprises a second field effect transistor; the grid electrode of the second field effect transistor is connected with the first switch control module; and the source electrode of the second field effect transistor is respectively connected with the first end of the first resistor and the power supply, and the drain electrode of the second field effect transistor is respectively connected with the second end of the first resistor and the first end of the coil of the relay.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112236836A (en) * | 2020-01-16 | 2021-01-15 | 深圳欣锐科技股份有限公司 | Low-power-consumption circuit and method for controlling relay |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112236836A (en) * | 2020-01-16 | 2021-01-15 | 深圳欣锐科技股份有限公司 | Low-power-consumption circuit and method for controlling relay |
| CN112236836B (en) * | 2020-01-16 | 2023-04-04 | 深圳欣锐科技股份有限公司 | Low-power-consumption circuit and method for controlling relay |
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