CN112236836B - Low-power-consumption circuit and method for controlling relay - Google Patents
Low-power-consumption circuit and method for controlling relay Download PDFInfo
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- CN112236836B CN112236836B CN202080002889.0A CN202080002889A CN112236836B CN 112236836 B CN112236836 B CN 112236836B CN 202080002889 A CN202080002889 A CN 202080002889A CN 112236836 B CN112236836 B CN 112236836B
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- triode
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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
- H01H47/001—Functional circuits, e.g. logic, sequencing, interlocking circuits
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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
- 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
- H01H2047/025—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 with taking into account of the thermal influences, e.g. change in resistivity of the coil or being adapted to high temperatures
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Abstract
The application discloses control relay low-power consumption circuit and method is applied to vehicle power supply, 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. 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 application relates to the technical field of motor control, in particular to a low-power-consumption circuit and a method for controlling a relay.
Background
With the development of switching power supplies and motor control technologies, 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, which causes the power at two ends of the coil to exceed the rated power, thereby not only affecting the service life of the relay, but also reducing the reliability of the relay circuit.
Disclosure of Invention
The embodiment of the application provides a low-power-consumption circuit and a method for controlling a relay, which not only realize the simplicity of controlling the low power consumption of the relay, but also improve the reliability of the low-power-consumption relay circuit.
In a first aspect, an embodiment of the present application provides a control relay low power consumption circuit, which is applied to a vehicle power supply, and includes:
the device 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.
In a second aspect, an embodiment of the present application provides a method for controlling a relay to consume low power, where the method is applied to a circuit for controlling a relay to consume low power shown in the foregoing embodiment, and the method includes:
connecting the first resistor in series with the relay, wherein a first end of the first resistor is connected with a power supply, and a second end of the first resistor is connected with a first end of a coil of the relay;
connecting the first electronic switch in parallel with the first resistor, wherein a first end of the first electronic switch is connected with the power supply, and a second end of the first electronic switch is connected with a first end of a coil of the relay;
connecting the second electronic switch in series with the relay, wherein a first end of the second electronic switch is connected with a second end of a coil of the relay, and a second end of the second electronic switch is grounded;
connecting the first switch control module with the first electronic switch, wherein the first switch control module is used for controlling the on-off state of the first electronic switch;
connecting the second switch control module with the second electronic switch, wherein the second switch control module is used for controlling the on-off state of the second electronic switch;
when the first switch control module controls the first electronic switch to be conducted and the second switch control module controls the second electronic switch to be conducted, the relay is set in a first working state;
when the first switch control module controls the first electronic switch to be switched on and the second switch control module controls the second electronic switch to be switched off, the relay is set in a second working state, and the consumed power of the relay in the second working state is smaller than that of the relay in the first working state.
It can be seen that the low power consumption circuit and method for controlling a relay described in the embodiments of the present application control the on/off state of a first electronic switch through a first switch control module, and control the on/off state of a second electronic switch through a second switch control module. 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 application 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 in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low power consumption circuit for controlling a relay according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a second low-power consumption circuit of a control relay according to an embodiment of the present application;
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 application;
fig. 4 is a schematic structural diagram of a fourth low-power consumption circuit of a control relay according to an embodiment of the present application;
fig. 5 is a schematic flowchart of a method for controlling a relay to consume low power according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular 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 only those steps or elements but may alternatively include other steps or elements not expressly 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 application. 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. Embodiments of the present application 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 disclosure. The control relay low-power consumption circuit includes: the first electronic switch S1, the resistor R1, the relay K1, the second electronic switch S2, the first switch control module 110, and the 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 a 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; 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, a circuit where the relay K1 is located cannot form a loop, no current passes through a coil of the relay K1, and the relay K1 is in a hold state at this time.
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 the relay K1 is in a first working state at the moment.
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 the resistor R1 connected in series with the relay K1 and two ends of the coil of the relay K1, and a certain current flows through the coil to generate 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, the relay K1 is in a second working state at the moment, 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 end of the resistor R1 and the power source VCC, and a collector c of the transistor is respectively connected to the second end of the resistor R1 and the first end 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 comprises a field effect transistor, a gate G of which is connected to the first switch control module 110, a source S of which is connected to a first terminal of the first resistor R1 and the power source VCC, respectively, and a drain D of which is connected to a second terminal of the first resistor R1 and a 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 conductive 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 comprises a field effect transistor, the gate G of which is connected to the second switch control module 120, the drain D of which is connected to the second end of the coil of the relay K1, the source S of which is connected to the ground 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 conductive state.
It can be seen that the control relay low power consumption circuit described in the embodiment of the present application 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 power consumed by the relay is reduced, so that the temperature of a coil of the relay is reduced, the service life of the relay is prolonged, and the reliability of a relay circuit is improved.
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 disclosure. The control relay low-power consumption circuit includes: resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, relay K1, triode Q2, triode Q3, diode D1 and electric capacity C1. As can be seen, 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 composed of a resistor R2, a resistor R3, a diode D1, a capacitor C1, and a transistor Q2, and the second switch control module 120 includes a circuit module composed of a first signal controller CTR1, a resistor R4, and a resistor R5.
Specifically, an emitter e of the triode Q1 is respectively connected with a power supply VCC and a first end of the resistor R1, a collector c of the triode Q1 is respectively connected with 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 with 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 emitting electrode e of the triode Q2 is respectively connected with a first end of the capacitor C1 and an emitting 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; the second end of the capacitor C1 is respectively connected with the cathode of the diode D1 and the second end of the resistor R3, and the first end of the capacitor C1 is connected with the emitter e of the triode 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 CTR1.
Specifically, first, when the power source VCC provides 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 a pull-in state. At this time, the conducting triode Q3 makes the anode of the diode D1 pull down to the ground GND, which causes the diode D1 to be cut off reversely, and the capacitor C1 discharges through the resistor R3, thereby ensuring that the triode Q2 and the triode Q1 are continuously conducted. Finally, when the capacitor C1 has insufficient capacity to support the transistor Q2 to continue to conduct, the transistor Q2 and the transistor Q1 are sequentially turned off. 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 on the relay K1, and reducing the power consumed by the relay K1.
It can be seen that, compared with the circuit structure shown in 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 on-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 on-state of the transistor Q3, so that the power consumed by the relay is reduced, and the reliability of the low-power relay circuit is further improved. In addition, through adjusting the capacitance capacity 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 disclosure. 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 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 with a power supply VCC and a first end of the resistor R1, a collector c of the triode Q1 is respectively connected with 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 with 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 emitting 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 grid 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; the second end of the capacitor C1 is respectively connected with the cathode of the diode D1 and the second end of the resistor R3, and the first end of the capacitor C1 is connected with the source electrode S of the field effect transistor Q4; a first end of the resistor R6 is respectively connected with the grid G of the field effect transistor Q4, a first end of the resistor R7 and a first end of the resistor R8, and a second end of the resistor R6 is respectively connected with the second signal controller CTR and the cathode of the diode D2; a first end of the resistor R7 is connected to a first end of the resistor R6, a first end of the resistor R8, and the gate G of the field effect transistor Q4, respectively, and a second end 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 field effect transistor 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, so that the relay K1 is ensured to complete the pull-in state. The power source VCC is applied to both ends of the coil of the relay K1 through the resistor R1, the voltage and the current on the relay K1 are reduced, and the power consumed by the relay K1 is reduced.
It can be seen that, compared with fig. 2, besides that the expected on-time of the triode Q2 can be obtained by adjusting the capacitance capacity of the capacitor C1, and the driving requirements of relays of different specifications are met, 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 at the same time, and finally, not only the low power consumption of the relay is controlled, but also 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 disclosure. The low-power consumption circuit for controlling the relay comprises: triode Q1, triode Q2, field effect transistor Q4, triode Q5, relay K1, resistance R2, resistance R3, resistance R9, resistance R10, resistance R11, diode D1, diode D3, electric capacity 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 with a power supply VCC and a first end of the resistor R1, a collector c of the triode Q1 is respectively connected with 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 with 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 emitting 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 the second end of the relay K1 and an anode of the diode D1, a grid 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; the second end of the capacitor C1 is respectively connected with the cathode of the diode D1 and the second end of the resistor R3, and the first end of the capacitor C1 is connected with the 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 the 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 respectively connected with the anode of the diode D3 and the base b of the triode Q5, and the second end of the resistor R9 is connected with the third signal controller CTR3.
Specifically, as described in fig. 2, the first switch control module 110, which is composed of the transistor Q2, the diode D1, the resistor R2, the resistor R3, and the capacitor C1, controls the on-time of the transistor Q1, so that the power VCC is applied to both 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 triode Q5 rapidly discharges the capacitance and the voltage between the gate G and the source S of the field effect transistor Q4 through the triode Q5, further reduces the on-off time and the loss during on-off 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 control relay low power consumption circuit.
The above description has been made of the solution of the embodiment of the present application from the circuit side. The following will describe the implementation steps for controlling the relay to consume less power in terms of method examples.
Referring to fig. 5, fig. 5 is a schematic flow chart of a method for controlling a relay to consume low power according to an embodiment of the present application, and the method is applied to a circuit for controlling a relay to consume low power shown in the foregoing embodiment, and the method includes:
s501, connecting a first resistor and a relay in series, wherein a first end of the first resistor is connected with a power supply, and a second end of the first resistor is connected with a first end of a coil of the relay;
s502, connecting a first electronic switch and a first resistor in parallel, wherein a first end of the first electronic switch is connected with a power supply, and a second end of the first electronic switch is connected with a first end of a coil of a relay;
s503, connecting a second electronic switch in series with the relay, wherein a first end of the second electronic switch is connected with a second end of a coil of the relay, and a second end of the second electronic switch is grounded;
s504, connecting a first switch control module with a first electronic switch, wherein the first switch control module is used for controlling the on-off state of the first electronic switch;
s505, connecting a second switch control module with a second electronic switch, wherein the second switch control module is used for controlling the on-off state of the second electronic switch;
s506, when the first switch control module controls the first electronic switch to be conducted and the second switch control module controls the second electronic switch to be conducted, setting the relay in a first working state;
and S507, when the first switch control module controls the first electronic switch to be switched on and the second switch control module controls the second electronic switch to be switched off, the relay is set in a second working state, and the power consumed by the relay in the second working state is smaller than that in the first working state.
It can be seen that in the method for controlling the relay with low power consumption described in the embodiment of the present application, the on-off state of the first electronic switch is controlled by the first switch control module, and the on-off state of the second electronic switch is controlled by the second switch control module. 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 above detailed description is given to a low-power-consumption circuit and method for controlling a relay provided in the embodiments of the present application, and specific embodiments are applied in the detailed description to explain the principles and embodiments of the present application, and the description of the above embodiments is only used to help understanding the method and core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (2)
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 triode, a third triode, a first resistor, a relay, a second resistor, a first diode, a first capacitor, a third resistor, a second triode, a first signal controller, a fourth resistor and a fifth resistor;
an emitting electrode of the first triode is respectively connected with a first end of the first resistor and a power supply, and a collecting electrode of the first triode is respectively connected with a second end of the first resistor and a first end of a coil of the relay;
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;
a base electrode of the second triode is connected with a second end of the third resistor, an emitting electrode of the second triode is respectively connected with a second end of the first capacitor and an emitting electrode of the third triode, and a collecting electrode of the third triode is connected with a second end of the coil of the relay;
the base electrode of the third triode is connected with the second end of the fourth resistor, 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;
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.
2. A low-power consumption method for a control relay, which is applied to the low-power consumption circuit for the control relay of claim 1, and is characterized by comprising the following steps:
when the first triode is conducted and the third triode is conducted, the relay is set to be in a first working state;
and when the third triode is conducted and the first triode is disconnected, the relay is set in a second working state, and the consumed power of the relay in the second working state is smaller than that of the relay in the first working state.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/072440 WO2021142705A1 (en) | 2020-01-16 | 2020-01-16 | Circuit and method for controlling low power consumption of relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112236836A CN112236836A (en) | 2021-01-15 |
| CN112236836B true CN112236836B (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202080002889.0A Active CN112236836B (en) | 2020-01-16 | 2020-01-16 | Low-power-consumption circuit and method for controlling relay |
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| Country | Link |
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| CN (1) | CN112236836B (en) |
| WO (1) | WO2021142705A1 (en) |
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| DE4410819A1 (en) * | 1993-03-26 | 1994-09-29 | Schleicher Relais | Circuit arrangement for operation of a relay |
| CN102231347A (en) * | 2010-08-08 | 2011-11-02 | 浙江上方光伏科技有限公司 | Low-power relay with high breaking capacity |
| CN203179794U (en) * | 2013-03-27 | 2013-09-04 | 安徽三联学院 | A low-power-consumption circuit based on the maintaining voltage of a relay |
| CN211236641U (en) * | 2020-01-16 | 2020-08-11 | 深圳欣锐科技股份有限公司 | Low-power-consumption circuit for controlling relay |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6044928B2 (en) * | 2012-09-25 | 2016-12-14 | パナソニックＩｐマネジメント株式会社 | Relay drive device |
| CN105551886B (en) * | 2015-12-30 | 2017-07-11 | 安徽贵博新能科技有限公司 | A kind of low-power relay drive circuit |
| TWI638584B (en) * | 2016-10-18 | 2018-10-11 | 大鵬科技股份有限公司 | Rf controlled switch box without using neutral wire and an rf controlled circuit thereof |
| CN109494120B (en) * | 2018-12-24 | 2024-05-31 | 深圳和而泰小家电智能科技有限公司 | Relay control circuit |
-
2020
- 2020-01-16 CN CN202080002889.0A patent/CN112236836B/en active Active
- 2020-01-16 WO PCT/CN2020/072440 patent/WO2021142705A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4410819A1 (en) * | 1993-03-26 | 1994-09-29 | Schleicher Relais | Circuit arrangement for operation of a relay |
| CN102231347A (en) * | 2010-08-08 | 2011-11-02 | 浙江上方光伏科技有限公司 | Low-power relay with high breaking capacity |
| CN203179794U (en) * | 2013-03-27 | 2013-09-04 | 安徽三联学院 | A low-power-consumption circuit based on the maintaining voltage of a relay |
| CN211236641U (en) * | 2020-01-16 | 2020-08-11 | 深圳欣锐科技股份有限公司 | Low-power-consumption circuit for controlling relay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112236836A (en) | 2021-01-15 |
| WO2021142705A1 (en) | 2021-07-22 |
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