A circuit capable of automatically reducing power consumption and temperature rise of a relay

Abstract

The application provides a circuit capable of automatically reducing power consumption and temperature rise of a relay, and belongs to the technical field of relay control. The circuit capable of automatically reducing power consumption and temperature rise of a relay comprises a relay module, a switching control module and a power supply module; an input end of the relay module is used for connecting a working voltage; an output end of the relay module is connected with an input end of the switching control module; a power supply end of the switching control module is used for connecting the power supply module; and the output end of the relay module is used for outputting the working voltage; an output end of the switching control module is connected with a first control end of the power supply module; and a second control end of the power supply module is connected with a control end of the relay module. The application can prolong the mechanical life and electrical life of the relay.

Description

Technical Field

[0001] This application relates to the field of relay control technology, and in particular to a circuit that can automatically reduce relay power consumption and temperature rise. Background Technology

[0002] Relays are commonly used control components in electronic circuits. Their working principle involves a coil being energized to generate a magnetic field that attracts the armature, causing the contacts to actuate. Continuous energization is required to maintain the engaged state. Currently, most relays use a driving method where the same rated operating voltage is applied during both the engagement and holding phases. However, a significant magnetic force is needed to overcome mechanical resistance during the engagement phase, while the magnetic force required to maintain the engaged state is much smaller. This constant voltage supply design has significant technical drawbacks: firstly, continuously applying the rated voltage leads to substantial ineffective energy consumption in the coil, resulting in energy waste, which contradicts the current trend of energy conservation and environmental protection; secondly, the coil's prolonged high-power, high-heat state causes excessive temperature rise in the relay, accelerating the aging and deterioration of the coil insulation layer, directly affecting the relay's mechanical and electrical lifespan, and reducing equipment reliability; furthermore, in confined spaces or high-temperature conditions, excessive temperature rise can lead to heat accumulation, potentially triggering short circuits, fires, and other safety risks, limiting the application of relays in scenarios with high requirements for energy consumption, lifespan, and safety. Utility Model Content

[0003] This application provides a circuit that can automatically reduce the power consumption and temperature rise of a relay, thereby extending the mechanical and electrical life of the relay.

[0004] This application provides a circuit that can automatically reduce relay power consumption and temperature rise, including: a relay module, a switching control module, and a power supply module; The input terminal of the relay module is used to connect to the working voltage, the output terminal of the relay module is connected to the input terminal of the switching control module, the power supply terminal of the switching control module is used to connect to the power supply module, and the output terminal of the relay module is used to output the working voltage. The output terminal of the switching control module is connected to the first control terminal of the power supply module, and the second control terminal of the power supply module is connected to the control terminal of the relay module. The power supply module includes a first power supply unit and a second power supply unit. The first control terminals of both the first power supply unit and the second power supply unit are connected to the output terminal of the switching control module, and the second control terminals of both the first power supply unit and the second power supply unit are connected to the control terminal of the relay module.

[0005] In one exemplary embodiment of this application, the switching control module includes resistors R6, R7, R8, R9, R10, operational amplifier U1B, and resistor R11; The first end of resistor R6 serves as the input terminal of the switching control module. The second end of resistor R6 is connected to the non-inverting input terminal of operational amplifier U1B. The non-inverting input terminal of operational amplifier U1B is grounded through resistor R7. The inverting input terminal of operational amplifier U1B is connected to a 2.5V reference voltage through resistor R8. The output terminal of operational amplifier U1B is connected to the non-inverting input terminal of operational amplifier U1B through resistor R9. The output terminal of operational amplifier U1B is connected to a 12V power supply through resistor R10. The output terminal of operational amplifier U1B is connected to the first end of resistor R11. The second end of resistor R11 serves as the output terminal of the switching control module.

[0006] In one exemplary embodiment of this application, the first power supply unit includes a transistor Q1; The second power supply unit includes transistor Q2; The base of transistor Q1 serves as the first control terminal of the first power supply unit, the collector of transistor Q1 serves as the second control terminal of the first power supply unit, the collector of transistor Q1 is connected to the control terminal of the relay module, and the emitter of transistor Q1 is connected to a 3V power supply. The base of transistor Q2 serves as the first control terminal of the second power supply unit, the emitter of transistor Q2 serves as the second control terminal of the second power supply unit, the collector of transistor Q2 is connected to the control terminal of the relay module, and the collector of transistor Q2 is grounded.

[0007] In one exemplary embodiment of this application, the first power supply unit further includes resistors R2 and R3; The second power supply unit also includes resistors R4 and R5; The first end of resistor R2 serves as the first control terminal of the first power supply unit, the second end of resistor R2 is connected to the 3V power supply through resistor R3, and the second end of resistor R2 is connected to the base of transistor Q1. The first end of resistor R5 serves as the first control terminal of the second power supply unit, the second end of resistor R5 is grounded through resistor R4, and the second end of resistor R5 is connected to the base of transistor Q2.

[0008] In one exemplary embodiment of this application, the control terminal of the relay module includes a first control terminal and a second control terminal; the second control terminals of the first power supply unit and the second power supply unit are both connected to the second control terminal of the relay module. The relay module includes relay Y1; The first power supply terminal of relay Y1 serves as the first control terminal of the relay module, and the second power supply terminal of relay Y1 serves as the second control terminal of the relay module. The first power supply terminal of relay Y1 is connected to a 12V power supply. The second power supply terminal of relay Y1 is connected to the second control terminal of the first power supply unit and the second power supply unit respectively. The normally open terminal of relay Y1 serves as the input terminal of the relay module and is used to connect the working voltage. The normally closed terminal of relay Y1 serves as the output terminal of the relay module and is used to output the working voltage.

[0009] In one exemplary embodiment of this application, the relay module further includes a diode D1; The anode of diode D1 is connected to the second power supply terminal of relay Y1, and the cathode of diode D1 is connected to the first power supply terminal of relay Y1.

[0010] In one exemplary embodiment of this application, the relay module further includes a resistor R1 and a capacitor C2; The first end of resistor R1 is connected to the normally closed terminal of relay Y1, and the second end of resistor R1 is grounded through capacitor C2. The second end of resistor R1 serves as the output terminal of the relay module and is used to output the working voltage.

[0011] The beneficial effects of the circuit that automatically reduces relay power consumption and temperature rise provided in this application embodiment are as follows: Based on the characteristic that a relay requires a large magnetic force at the moment of activation and only a small magnetic force during the holding phase, the switching control module can accurately identify the on / off state of the relay by detecting the voltage signal at the output terminal of the relay module. Before activation, it outputs a first control signal to start the second power supply unit, providing the relay module with a first working power supply that meets the activation requirements, ensuring reliable activation. After activation, it switches and outputs a second control signal to start the first power supply unit, reducing the control voltage to a second working power supply that can only maintain activation. The dynamic voltage switching directly reduces the ineffective energy consumption of the coil, avoiding the power waste caused by traditional constant rated voltage power supply, and meeting the requirements of energy conservation and environmental protection. At the same time, the low voltage holding mode significantly reduces coil heating, effectively suppresses the overall temperature rise of the relay, slows down the aging rate of the coil insulation layer, and significantly extends the mechanical and electrical life of the relay. In addition, the controllability of temperature rise also avoids the safety risks caused by overheating in closed or high-temperature environments, improving the safety and stability of circuit applications. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1This is a block diagram of a circuit that can automatically reduce relay power consumption and temperature rise, provided in an embodiment of this application. Figure 2 This is a circuit diagram provided in an embodiment of the present application that can automatically reduce relay power consumption and temperature rise. Detailed Implementation

[0014] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0015] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0016] The implementation of this application will be described in detail below with reference to the specific accompanying drawings: Figure 1 This is a schematic diagram of a circuit that can automatically reduce relay power consumption and temperature rise, provided as an embodiment of this application. (Refer to...) Figure 1 The circuit that can automatically reduce relay power consumption and temperature rise includes: a relay module, a switching control module, and a power supply module; The input terminal of the relay module is used to connect to the working voltage, the output terminal of the relay module is connected to the input terminal of the switching control module, the power supply terminal of the switching control module is used to connect to the power supply module, and the output terminal of the relay module is used to output the working voltage. The output terminal of the switching control module is connected to the first control terminal of the power supply module, and the second control terminal of the power supply module is connected to the control terminal of the relay module. The power supply module includes a first power supply unit and a second power supply unit. The first control terminals of both the first power supply unit and the second power supply unit are connected to the output terminal of the switching control module, and the second control terminals of both the first power supply unit and the second power supply unit are connected to the control terminal of the relay module.

[0017] In this embodiment, when the relay needs to be engaged, the switching control module first connects the power module and enters the working state. At this time, the contacts of the relay module are in the open state, and there is no voltage signal output at its output terminal. As a result, no voltage signal is detected at the input terminal of the switching control module, and the switching control module then outputs a first control signal corresponding to the open state of the relay. This first control signal acts on the second power supply unit of the power supply module. After receiving the signal, the second power supply unit outputs a first working power supply to the relay module. This power supply is the rated voltage that meets the magnetic force required for the relay to engage instantly, and can drive the relay module to quickly complete the armature engagement action.

[0018] After the relay module is engaged, a voltage signal is generated at its output terminal. Upon detecting this voltage signal at the input terminal of the switching control module, it immediately switches to output a second control signal. The second control signal then controls the first power supply unit of the power supply module. After the first power supply unit starts, it switches the control voltage of the relay module from the first operating power supply to the second operating power supply. The voltage value of the second operating power supply is lower than that of the first operating power supply, and the magnetic force it provides is sufficient to maintain the engaged state of the relay module. At the same time, it significantly reduces the energy consumption and heat generation of the coil, fundamentally solving the problems of power consumption waste, temperature rise, and safety hazards caused by continuous rated voltage power supply.

[0019] As can be seen from the above, this embodiment, based on the characteristic that a large magnetic force is required for the relay to engage and only a small magnetic force is required during the holding phase, allows the switching control module to accurately identify the relay's on / off state by detecting the voltage signal at the relay module's output. Before engagement, it outputs a first control signal to activate the second power supply unit, providing the relay module with a first working power supply that meets the engagement requirements, ensuring reliable engagement. After engagement, it switches and outputs a second control signal to activate the first power supply unit, reducing the control voltage to a second working power supply that can only maintain engagement. This dynamic voltage switching directly reduces the coil's ineffective energy consumption, avoiding the power waste caused by traditional constant rated voltage power supply, thus meeting energy-saving and environmental protection requirements. At the same time, the low-voltage holding mode significantly reduces coil heating, effectively suppressing the overall temperature rise of the relay, slowing down the aging rate of the coil insulation layer, and significantly extending the mechanical and electrical life of the relay. Furthermore, the controllability of temperature rise also avoids safety risks caused by overheating in enclosed or high-temperature environments, improving the safety and stability of the circuit application.

[0020] like Figure 2 As shown, in one embodiment of this application, the switching control module includes resistors R6, R7, R8, R9, R10, operational amplifier U1B, and resistor R11. The first end of resistor R6 serves as the input terminal of the switching control module. The second end of resistor R6 is connected to the non-inverting input terminal of operational amplifier U1B. The non-inverting input terminal of operational amplifier U1B is grounded through resistor R7. The inverting input terminal of operational amplifier U1B is connected to a 2.5V reference voltage through resistor R8. The output terminal of operational amplifier U1B is connected to the non-inverting input terminal of operational amplifier U1B through resistor R9. The output terminal of operational amplifier U1B is connected to a 12V power supply through resistor R10. The output terminal of operational amplifier U1B is connected to the first end of resistor R11. The second end of resistor R11 serves as the output terminal of the switching control module.

[0021] In this embodiment, resistors R6, R7, R8, R9, R10, and R11, together with operational amplifier U1B, constitute a voltage comparator with positive feedback. By detecting the voltage change at the output terminal of the relay module, it outputs a corresponding level signal to control the switching of the power supply unit.

[0022] When the relay module needs to engage, the switching control module first connects to the 12V power supply, and the operational amplifier U1B enters the working state. At this time, the relay module contacts are not engaged, and there is no voltage output at its output terminal; the voltage at the first terminal of resistor R6 is 0V. This 0V signal is transmitted to the non-inverting input terminal of operational amplifier U1B through resistor R6. Simultaneously, the non-inverting input terminal is grounded through resistor R7, forming a voltage divider, making the voltage at the non-inverting input terminal lower than the 2.5V reference voltage connected to the inverting input terminal through resistor R8. Resistor R9 acts as a positive feedback resistor, stabilizing the comparator state and preventing jitter, while resistor R10 acts as a pull-up resistor to ensure the stability of the output level. At this time, operational amplifier U1B outputs a low level. This low-level signal is transmitted to the power supply module through resistor R11, effectively controlling only the second power supply unit; the first power supply unit does not respond. The voltage output by the second power supply unit meets the magnetic force requirement for the relay module contacts to engage quickly.

[0023] When the relay module contacts close, its output generates a voltage signal, which is transmitted to the first terminal of resistor R6. This voltage, after being divided by resistors R6 and R7, raises the voltage at the non-inverting input of operational amplifier U1B, exceeding the 2.5V reference voltage at the inverting input. As a result, the output of operational amplifier U1B flips to a high level. This high-level signal, output through resistor R11, effectively controls only the first power supply unit. The second power supply unit stops operating, and the first power supply unit outputs a lower voltage, just enough to maintain the relay module contacts in the closed state, thus reducing power consumption and temperature rise. Resistor R8 limits the current in the reference voltage branch, preventing component damage. The entire circuit achieves automatic switching of power supply units through precise detection and feedback of level changes.

[0024] As can be seen from the above, the switching control module in this embodiment uses an operational amplifier and multiple resistors to form a voltage comparator with positive feedback. This comparator can accurately detect changes in the output voltage of the relay module to determine its on / off state and automatically switch between high and low output levels. Resistor R9 stabilizes the comparator state to prevent jitter, R10 ensures stable output level, and R11 provides current limiting protection. The overall circuit structure is simple and responds quickly. It can precisely control the switching of the power supply unit, ensuring reliable relay engagement and low power consumption during the holding phase, effectively reducing temperature rise, and simultaneously improving circuit stability and component lifespan.

[0025] like Figure 2 As shown, in one embodiment of this application, the first power supply unit includes a transistor Q1; The second power supply unit includes transistor Q2; The base of transistor Q1 serves as the first control terminal of the first power supply unit, the collector of transistor Q1 serves as the second control terminal of the first power supply unit, the collector of transistor Q1 is connected to the control terminal of the relay module, and the emitter of transistor Q1 is connected to a 3V power supply. The base of transistor Q2 serves as the first control terminal of the second power supply unit, the emitter of transistor Q2 serves as the second control terminal of the second power supply unit, the collector of transistor Q2 is connected to the control terminal of the relay module, and the collector of transistor Q2 is grounded.

[0026] In this embodiment, both the PNP transistor Q1 in the first power supply unit and the NPN transistor Q2 in the second power supply unit operate in a switching state. Their on and off states are completely controlled by the output level of the operational amplifier U1B in the switching control module, which in turn achieves voltage switching during the energizing and holding phases of the relay module.

[0027] When the operational amplifier U1B outputs a low level, this low-level signal is transmitted to the bases of transistors Q1 and Q2 respectively: for transistor Q2 (NPN type), the low level at its base satisfies its conduction condition, and transistor Q2 turns on; for transistor Q1 (PNP type), the low level at its base keeps it in the off state. At this time, the control terminal of the relay module forms a complete circuit with ground through the collector of the conducting transistor Q2, obtaining the rated voltage required for engagement. The magnetic force is sufficient to overcome mechanical resistance and complete the armature engagement action.

[0028] When the operational amplifier U1B outputs a high level, the high-level signal acts on the bases of the two transistors: a high level at the base of transistor Q1 (PNP type) triggers its conduction, while a high level at the base of transistor Q2 (NPN type) turns it off. At this time, the control terminal of the relay module is connected to the collector of transistor Q1, forming a circuit through the conducting transistor Q1 and the 3V power supply connected to its emitter. This voltage is 3V lower than the rated voltage when the relay is engaged, but sufficient to provide the magnetic force to maintain the armature's engagement. This ensures the relay remains stably engaged while significantly reducing coil power consumption and temperature rise. The complementary switching action of the two transistors achieves uninterrupted switching of the power supply circuit, ensuring the continuity and reliability of the relay's operation.

[0029] As can be seen from the above, this embodiment, by receiving high and low level signals from the switching control module, uses two transistors to alternately conduct and cut off, precisely achieving seamless switching between the holding voltage and the rated pull-in voltage. This ensures reliable relay pull-in, significantly reduces coil power consumption and temperature rise through low-voltage maintenance, improves circuit stability, and extends relay lifespan.

[0030] like Figure 2 As shown, in one embodiment of this application, the first power supply unit further includes resistors R2 and R3; The second power supply unit also includes resistors R4 and R5; The first end of resistor R2 serves as the first control terminal of the first power supply unit, the second end of resistor R2 is connected to the 3V power supply through resistor R3, and the second end of resistor R2 is connected to the base of transistor Q1. The first end of resistor R5 serves as the first control terminal of the second power supply unit, the second end of resistor R5 is grounded through resistor R4, and the second end of resistor R5 is connected to the base of transistor Q2.

[0031] In this embodiment, when the operational amplifier U1B outputs a low level, the low-level signal is transmitted to the base of Q2 via resistor R5 (the first control terminal of the second power supply unit): R5 limits the base input current to prevent excessive current from burning out Q2. At the same time, R4 acts as a pull-down resistor to stabilize the base potential of Q2 at a low level, ensuring that the NPN type Q2 is reliably turned on. At this time, the low-level signal is also transmitted to R2 (the first control terminal of the first power supply unit). After R2 limits the current, the base of the PNP type Q1 is kept at a low level, Q1 remains off, and the relay module control terminal forms a loop with ground through Q2 to obtain the pull-in rated voltage.

[0032] When op-amp U1B outputs a high level, the high-level signal is transmitted to the base of Q1 via R2: R2 limits the base current, and R3, acting as a pull-up resistor in conjunction with the 3V power supply, stabilizes the high level at the base of Q1, ensuring reliable conduction of the PNP type Q1. Simultaneously, the high-level signal is transmitted to the base of Q2 via R5. R5 limits the current to protect Q2, and R4 pulls down the transistor, creating a reverse bias between the base and emitter of Q2, ensuring reliable cutoff of Q2. The relay module control terminal forms a loop with the 3V power supply through Q1, obtaining a low voltage to maintain engagement. The added resistors effectively prevent damage to the transistor base from overcurrent, suppress false switching caused by potential jitter, and further improve the stability and reliability of the power supply unit.

[0033] like Figure 2 As shown, in one embodiment of this application, the control terminal of the relay module includes a first control terminal and a second control terminal; the second control terminals of the first power supply unit and the second power supply unit are both connected to the second control terminal of the relay module. The relay module includes relay Y1; The first power supply terminal of relay Y1 serves as the first control terminal of the relay module, and the second power supply terminal of relay Y1 serves as the second control terminal of the relay module. The first power supply terminal of relay Y1 is connected to a 12V power supply. The second power supply terminal of relay Y1 is connected to the second control terminal of the first power supply unit and the second power supply unit respectively. The normally open terminal of relay Y1 serves as the input terminal of the relay module and is used to connect the working voltage. The normally closed terminal of relay Y1 serves as the output terminal of the relay module and is used to output the working voltage.

[0034] In this embodiment, when relay Y1 is energized, transistor Q2 is turned on. At this time, the voltage between the coils of relay Y1 (i.e., between the first power supply terminal and the second power supply terminal of relay Y1) is 12V. After the contacts of relay Y1 are energized, transistor Q1 is turned on and transistor Q2 is turned off. At this time, the voltage between the coils of relay Y1 is 12V-3V=9V. The 9V voltage can keep the contacts of relay Y1 in the energized state.

[0035] During the pull-in phase, the operational amplifier U1B of the switching control module outputs a low level, triggering the NPN transistor Q2 of the second power supply unit to conduct and the PNP transistor Q1 of the first power supply unit to cut off. At this time, the first power supply terminal of relay Y1 is fixedly connected to a 12V power supply, and the second power supply terminal is grounded through the conducting transistor Q2. A 12V rated voltage is formed across the coil, generating sufficient magnetic force to overcome mechanical resistance and drive the normally open and normally closed terminals of relay Y1 to engage. The normally open terminal of relay Y1 serves as the module input terminal, receiving the operating voltage. After engagement, the operating voltage is output through the normally closed terminal (module output terminal), providing a voltage feedback signal to the switching control module.

[0036] During the holding phase, after the switching control module detects the feedback voltage, the operational amplifier U1B flips to a high-level output, turning on transistor Q1 and turning off transistor Q2. The second power supply terminal of relay Y1 is then connected to a 3V power supply through the conducting Q1, and the voltage across the coil becomes a potential difference between 12V and 3V (i.e., 9V). Although this 9V voltage is lower than the 12V at the time of energization, it is sufficient to provide the magnetic force required to maintain the armature's engagement, ensuring that the relay contacts remain stably conducting while reducing energy consumption and heat generation due to the lower coil voltage. At the same time, the normally open and normally closed terminals of relay Y1 remain continuously engaged, ensuring a stable operating voltage output and achieving the dual effects of reliable engagement and low power consumption during holding.

[0037] As can be seen from the above, the relay module in this embodiment, by optimizing the power supply terminal and input / output terminal configuration of relay Y1, can achieve precise linkage with the power supply unit. During the pull-in phase, a 12V voltage ensures reliable contact operation, while the 9V voltage during the holding phase effectively reduces coil power consumption and temperature rise, while simultaneously stabilizing the output operating voltage. Its simple structure and strong linkage not only improve the relay's operational stability but also extend its service life.

[0038] like Figure 2 As shown, in one embodiment of this application, the relay module further includes a diode D1; The anode of diode D1 is connected to the second power supply terminal of relay Y1, and the cathode of diode D1 is connected to the first power supply terminal of relay Y1.

[0039] In this embodiment, the coil of relay Y1 is an inductive element. When the circuit switches (e.g., from the conduction of transistor Q2 in the pull-in stage to the conduction of transistor Q1 in the hold stage, or the entire circuit is de-energized), the current in the coil changes suddenly. According to the principle of electromagnetic induction, an instantaneous back electromotive force is generated across the coil. The direction of this back electromotive force is opposite to the original supply voltage, meaning that the potential at the second power supply terminal of relay Y1 will be higher than that at the first power supply terminal (12V power supply terminal), potentially forming a high-voltage spike.

[0040] Since the anode of diode D1 is connected to the second power supply terminal of relay Y1 and the cathode is connected to the first power supply terminal of relay Y1, the reverse electromotive force will cause the anode potential of diode D1 to be higher than that of the cathode, satisfying the conduction condition. Diode D1 quickly conducts and forms a freewheeling circuit. The electromagnetic energy stored in the coil is slowly released through this circuit, which not only avoids the reverse high voltage spike from breaking down switching elements such as transistors Q1 and Q2, but also suppresses the interference of voltage changeovers on other parts of the circuit, ensuring a smooth power supply switching process and further improving the reliability and stability of the entire circuit.

[0041] like Figure 2 As shown, in one embodiment of this application, the relay module further includes a resistor R1 and a capacitor C2; The first end of resistor R1 is connected to the normally closed terminal of relay Y1, and the second end of resistor R1 is grounded through capacitor C2. The second end of resistor R1 serves as the output terminal of the relay module and is used to output the working voltage.

[0042] In this embodiment, the low-pass filter circuit composed of resistor R1 and capacitor C2 is used to filter out high-frequency interference signals in the output operating voltage of the relay module, output a stable DC voltage, and ensure the accuracy of detection and operation of subsequent circuits (such as the switching control module).

[0043] The operating voltage output from the normally closed terminal of relay Y1 is first transmitted to the module output terminal through resistor R1. For the low-frequency operating signal (or DC signal) required by the circuit, capacitor C2 has a large capacitive reactance and is approximately open-circuit, allowing the signal to be output smoothly through resistor R1, thus meeting the power supply or detection requirements of subsequent circuits.

[0044] Through the combined effect of resistor R1 and capacitor C2, the module output terminal obtains a stable operating voltage free from high-frequency interference, effectively avoiding misjudgment of the switching control module caused by interference and ensuring the reliable operation of the entire circuit.

[0045] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A circuit that can automatically reduce relay power consumption and temperature rise, characterized in that, include: Relay module, switching control module, and power supply module; The input terminal of the relay module is used to connect to the working voltage, the output terminal of the relay module is connected to the input terminal of the switching control module, the power supply terminal of the switching control module is used to connect to the power supply module, and the output terminal of the relay module is used to output the working voltage. The output terminal of the switching control module is connected to the first control terminal of the power supply module, and the second control terminal of the power supply module is connected to the control terminal of the relay module. The power supply module includes a first power supply unit and a second power supply unit; The first control terminals of the first power supply unit and the second power supply unit are both connected to the output terminal of the switching control module, and the second control terminals of the first power supply unit and the second power supply unit are both connected to the control terminal of the relay module.

2. The circuit as described in claim 1, which can automatically reduce relay power consumption and temperature rise, is characterized in that... The switching control module includes resistors R6, R7, R8, R9, R10, operational amplifier U1B, and resistor R11. The first end of resistor R6 serves as the input terminal of the switching control module. The second end of resistor R6 is connected to the non-inverting input terminal of operational amplifier U1B. The non-inverting input terminal of operational amplifier U1B is grounded through resistor R7. The inverting input terminal of operational amplifier U1B is connected to a 2.5V reference voltage through resistor R8. The output terminal of operational amplifier U1B is connected to the non-inverting input terminal of operational amplifier U1B through resistor R9. The output terminal of operational amplifier U1B is connected to a 12V power supply through resistor R10. The output terminal of operational amplifier U1B is connected to the first end of resistor R11. The second end of resistor R11 serves as the output terminal of the switching control module.

3. The circuit as described in claim 1, which can automatically reduce relay power consumption and temperature rise, is characterized in that... The first power supply unit includes transistor Q1; The second power supply unit includes transistor Q2; The base of transistor Q1 serves as the first control terminal of the first power supply unit, the collector of transistor Q1 serves as the second control terminal of the first power supply unit, the collector of transistor Q1 is connected to the control terminal of the relay module, and the emitter of transistor Q1 is connected to a 3V power supply. The base of transistor Q2 serves as the first control terminal of the second power supply unit, the emitter of transistor Q2 serves as the second control terminal of the second power supply unit, the collector of transistor Q2 is connected to the control terminal of the relay module, and the collector of transistor Q2 is grounded.

4. The circuit as described in claim 3, which can automatically reduce relay power consumption and temperature rise, is characterized in that... The first power supply unit also includes resistors R2 and R3; The second power supply unit also includes resistors R4 and R5; The first end of the resistor R2 serves as the first control terminal of the first power supply unit, the second end of the resistor R2 is connected to the 3V power supply through the resistor R3, and the second end of the resistor R2 is connected to the base of the transistor Q1. The first end of the resistor R5 serves as the first control terminal of the second power supply unit, the second end of the resistor R5 is grounded through the resistor R4, and the second end of the resistor R5 is connected to the base of the transistor Q2.

5. The circuit as described in claim 1, which can automatically reduce relay power consumption and temperature rise, is characterized in that... The control terminal of the relay module includes a first control terminal and a second control terminal; the second control terminals of the first power supply unit and the second power supply unit are both connected to the second control terminal of the relay module. The relay module includes relay Y1; The first power supply terminal of relay Y1 serves as the first control terminal of the relay module, and the second power supply terminal of relay Y1 serves as the second control terminal of the relay module. The first power supply terminal of relay Y1 is connected to a 12V power supply. The second power supply terminal of relay Y1 is connected to the second control terminals of the first power supply unit and the second power supply unit, respectively. The normally open terminal of relay Y1 serves as the input terminal of the relay module and is used to connect to the working voltage. The normally closed terminal of relay Y1 serves as the output terminal of the relay module and is used to output the working voltage.

6. The circuit as described in claim 5, which can automatically reduce relay power consumption and temperature rise, is characterized in that... The relay module also includes a diode D1; The anode of diode D1 is connected to the second power supply terminal of relay Y1, and the cathode of diode D1 is connected to the first power supply terminal of relay Y1.

7. The circuit as described in claim 5, which can automatically reduce relay power consumption and temperature rise, is characterized in that... The relay module also includes a resistor R1 and a capacitor C2; The first end of the resistor R1 is connected to the normally closed terminal of the relay Y1, and the second end of the resistor R1 is grounded through the capacitor C2. The second end of the resistor R1 serves as the output terminal of the relay module and is used to output the operating voltage.

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