Dual-power redundant hot backup circuit and electronic equipment
By comparing the conduction and turn-off of the voltage control module and the switch tube, the loss and switching time problems of the existing dual power input solution are solved, and the dual power switching with low loss and high reliability is achieved, which improves the reliability of the system.
Patent Information
- Application Number
- CN202422202024.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing dual power input solution has problems such as large additional losses, long switching time, mechanical wear and noise, which cannot meet the needs of electronic products for low power consumption and reliability.
The first and second power input modules and comparison control modules are adopted to control the conduction and turn-off of the switch tubes through voltage comparison, so as to achieve seamless switching, avoid mechanical contact switching, reduce losses and improve reliability.
It realizes dual power switching with low loss and high reliability, avoids mechanical wear and noise, and improves system reliability.
Smart Images
Figure CN223246327U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of power system control, and in particular to a dual-power redundant hot backup circuit and electronic equipment. Background Art
[0002] In some industrial communications and industrial control applications, the reliability of electronic product power supplies is crucial. To improve power supply reliability, dual power inputs can be considered. This allows the other power source to be immediately available if one source loses power. Currently, two common approaches are used. One uses two rectifier bridges to combine the two power sources to power the load. However, this approach introduces unnecessary power losses, which fall short of the low-power requirements of electronic products. The other approach uses mechanical relay contacts to switch between normally open and normally closed positions, enabling switching to the other source when one source loses power. However, these approaches suffer from long switching times, short service life, arcing, and noise, and therefore often fail to meet the reliability requirements of electronic products. Utility Model Content
[0003] In view of this, an embodiment of the present application provides a dual-power redundant hot backup circuit and an electronic device to implement a dual-power input circuit with low loss and high reliability.
[0004] In a first aspect, an embodiment of the present application provides a method comprising: a first power input module, a first comparison control module, a second power input module, and a second comparison control module;
[0005] The first power input module is electrically connected to a first power source and is configured to output a first voltage;
[0006] The second power input module is electrically connected to a second power source and is configured to output a second voltage;
[0007] The output ends of the first power input module and the second power input module are used to be commonly connected to a load, so that the first voltage and / or the second voltage are used as the power supply voltage of the load;
[0008] The first comparison control module is connected to the first power supply, the first power input module and the second power input module respectively, and is used to output first level signals of different states according to the comparison result of the first voltage and the second voltage to control whether the first power supply is output;
[0009] The second comparison control module is respectively connected to the second power supply, the first power input module and the second power input module, and is used to output second level signals of different states according to the comparison results of the first voltage and the second voltage to control whether the second power supply is output.
[0010] In a first possible embodiment of the first aspect, each of the power input modules includes a switching tube;
[0011] The first power input module is further configured to control the switch tube to be turned on or off according to the level state of the first level signal;
[0012] The second power input module is further configured to control the switch tube to be turned on or off according to the level state of the second level signal.
[0013] In a second possible embodiment of the first aspect, the first comparison control module is further configured to, when the first voltage is greater than the second voltage, output the first-level signal in a first-level state to turn on the switch tube;
[0014] The first comparison control module is further configured to output the first level signal in a second level state to turn off the switch tube when the first voltage is lower than the second voltage;
[0015] The first comparison control module is further configured to, when the first voltage is equal to the second voltage, continuously output the first level signal in a first level state or a second level state, so as to keep the switch tube continuously turned on or turned off.
[0016] In a third possible embodiment of the first aspect, the second comparison control module is further configured to, when the second voltage is greater than the first voltage, output the second-level signal in a first-level state to turn on the switch tube;
[0017] The second comparison control module is further configured to output a second level signal in a second level state to turn off the switch tube when the second voltage is lower than the first voltage;
[0018] The second comparison control module is further configured to, when the second voltage is equal to the first voltage, continuously output the second level signal in the first level state or the second level state, so as to keep the switch tube continuously turned on or turned off.
[0019] In a fourth possible embodiment of the first aspect, the first comparison control module and the second comparison control module both include a first current limiting resistor, a second current limiting resistor, a third current limiting resistor, a pull-up resistor, and an operational amplifier;
[0020] The first end of the first current limiting resistor is connected to the first power supply or the second power supply and the first end of the switch tube respectively, and the second end of the first current limiting resistor is connected to the inverting input end of the operational amplifier;
[0021] The non-inverting input terminal of the operational amplifier is connected to the first terminal of the second current limiting resistor, the second terminal of the second current limiting resistor is connected to the second terminal of the switch tube, the positive power supply terminal of the operational amplifier is connected to the second terminal of the switch tube, and the negative power supply terminal of the operational amplifier is grounded;
[0022] The output end of the operational amplifier is respectively connected to the first end of the pull-up resistor and the first end of the third current limiting resistor, the second end of the pull-up resistor is connected to the second end of the switch tube, and the second end of the third current limiting resistor is connected to the third end of the switch tube.
[0023] In a fifth possible embodiment of the first aspect, the switching tube is a field effect transistor or a triode.
[0024] In a sixth possible embodiment of the first aspect, the operational amplifiers in the first comparison control module and the second comparison control module are replaced by microcontrollers.
[0025] In a seventh possible embodiment of the first aspect, the load includes a filter capacitor;
[0026] A first parallel node between the filter capacitor and the load is connected to the output ends of the first power input module and the second power input module, and a second parallel node between the filter capacitor and the load is grounded.
[0027] In a second aspect, an embodiment of the present application provides an electronic device, comprising the above-mentioned dual power supply redundant hot backup circuit.
[0028] In a seventh possible embodiment of the first aspect, the electronic device further includes a first power supply and a second power supply, and the first power supply and the second power supply are respectively connected to the dual power supply redundant hot backup circuit.
[0029] The embodiments of the present application have the following beneficial effects:
[0030] A dual power supply redundant hot backup circuit of this embodiment includes: a first power supply input module, a first comparison control module, a second power supply input module, and a second comparison control module. The first power supply input module is connected to the first power supply and outputs a first voltage; the second power supply input module is connected to the second power supply and outputs a second voltage; the first comparison control module is connected to the first power supply and each power supply input module, and outputs a first level signal to control the output of the first power supply based on the comparison result of the first voltage and the second voltage; the second comparison control module is connected to the second power supply and each power supply input module, and outputs a second level signal to control the output of the second power supply based on the comparison result of the first voltage and the second voltage. Based on the above scheme, the dual power supply redundant hot backup circuit can realize dual power supply hot backup, control the output of the power supply with higher voltage and the non-output of the power supply with lower voltage, and realize seamless switching when one of the power supplies fails; the dual power supply redundant hot backup circuit realizes dual power supply switching with low loss and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0032] Figure 1 A circuit diagram of a dual-power redundant hot backup circuit based on a rectifier bridge according to an embodiment of the present application is shown;
[0033] Figure 2 A circuit diagram of a dual power supply redundant hot backup circuit based on relays according to an embodiment of the present application is shown;
[0034] Figure 3 A schematic diagram of the structure of a dual power supply redundant hot backup circuit according to an embodiment of the present application is shown;
[0035] Figure 4 A circuit diagram of a dual power supply redundant hot backup circuit according to an embodiment of the present application is shown.
[0036] Description of main component symbols:
[0037] 100 - dual power supply redundant hot backup circuit; 110 - first power supply input module; 120 - first comparison control module; 130 - second power supply input module; 140 - second comparison control module. DETAILED DESCRIPTION
[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.
[0039] The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but rather merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.
[0040] Hereinafter, the terms "including", "having" and their cognates used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the aforementioned items, and should not be understood as excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the aforementioned items or adding the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the aforementioned items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and should not be understood as indicating or implying relative importance.
[0041] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meaning as in the context of the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning unless clearly defined in the various embodiments of the present application.
[0042] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.
[0043] Typically, the circuit diagram of the dual power supply redundant hot backup using a rectifier bridge solution is as follows Figure 1As shown, when the first power supply Vin1 and the second power supply Vin2 are supplying power simultaneously, due to the unidirectional conduction characteristics of the diodes, the higher-voltage power supply is turned on, and the current flows through diodes D1 and D2 in the rectifier bridge to supply the load LOAD. The lower-voltage power supply serves as a backup power source. When the first power supply Vin1 fails and loses power, the second power supply Vin2 is turned on alone, and the current flows through the diodes in the second rectifier bridge VD2 to supply the load LOAD. When the second power supply Vin2 fails and loses power, the first power supply Vin1 is turned on alone, and the current flows through the diodes in the first rectifier bridge VD1 to supply the load LOAD. In this solution, current flows through both diodes in the rectifier bridge simultaneously, resulting in significant additional losses.
[0044] The circuit diagram of the dual power supply redundant hot backup using relay solution is as follows Figure 2 As shown, when the first power supply Vin1 and the second power supply Vin2 supply power at the same time, the coil of the relay K1 is energized by the first power supply Vin1, the normally closed contact NC is disconnected, and the normally open contact NO is closed; the first power supply Vin1 is connected to the common terminal COM through the normally open contact NO to supply power to the load LOAD; when the second power supply Vin2 fails and the power is cut off, the first power supply Vin1 supplies power alone, the coil of the relay K1 is energized by the first power supply Vin1, the normally closed contact NC is disconnected, and the normally open contact NO is closed; the first power supply Vin1 is connected to the common terminal COM through the normally open contact NO to supply power to the load LOAD; when the first power supply Vin1 fails and the power is cut off, the second power supply Vin2 supplies power alone, the coil of the relay K1 loses power, the normally closed contact NC is closed, and the normally open contact NO is disconnected; the second power supply Vin2 is connected to the common terminal COM through the normally closed contact NC to supply power to the load LOAD. A Schottky diode D1 is connected in reverse parallel across the coil of relay K1 to provide freewheeling. When the coil of relay K1 is de-energized, a self-induced electromotive force (EMF) is generated across the coil. Schottky diode D1 provides a discharge path for this self-induced EMF, thereby protecting relay K1. This mechanical solution using relay K1 for dual power backup has drawbacks such as long switching time, short service life, and excessive noise. Furthermore, arcing cannot be avoided, posing a safety hazard.
[0045] This application provides a dual-power supply redundant hot backup circuit. Based on a voltage comparison between a first power supply Vin1 and a second power supply Vin2, the circuit controls the output of the first power supply Vin1 and the second power supply Vin2, thereby outputting the power supply with a higher voltage and normal operation, and omitting the power supply with a lower voltage or a faulty operation. This dual-power supply redundant hot backup circuit addresses the aforementioned issues of high excess power loss and long switching times, eliminates the risks of mechanical wear, arcing, and noise, and improves system reliability.
[0046] The dual power supply redundant hot backup circuit is described below with reference to some specific embodiments.
[0047] Figure 3 A schematic structural diagram of a dual-power redundant hot backup circuit 100 according to an embodiment of the present application is shown. Exemplarily, the dual-power redundant hot backup circuit 100 includes a first power input module 110, a first comparison control module 120, a second power input module 130, and a second comparison control module 140. Specifically, the first power input module 110 and the second power input module 130 are connected to a first power supply Vin1 and a second power supply Vin2, respectively. The first comparison control module 120 is connected in parallel with the second comparison control module 140. The first comparison control module 120 is connected to the first power supply Vin1 and the second power input module 130, respectively, to perform a comparison based on a first voltage and a second voltage. The first comparison control module 120 is also connected to the first power input module 110 to control the output of the first power supply Vin1 based on the voltage comparison result. The second comparison control module 140 is respectively connected to the second power supply Vin2 and the first power supply input module 110 to compare the first voltage and the second voltage. The second comparison control module 140 is also connected to the second power supply input module 130 to enable the second power supply input module 130 to control the output of the second power supply Vin2 according to the voltage comparison result.
[0048] In this embodiment, the first power input module 110 is electrically connected to the first power supply Vin1 for outputting a first voltage; the second power input module 130 is electrically connected to the second power supply Vin2 for outputting a second voltage; the output ends of the first power input module 110 and the second power input module 130 are used to be commonly connected to a load LOAD so that the first voltage and / or the second voltage are used as the supply voltage V_LOAD of the load LOAD; the first comparison control module 120 is respectively connected to the first power supply Vin1, the first power input module 110 and the second power input module 130, and is used to output first level signals of different states according to the comparison result of the first voltage and the second voltage to control whether the first power supply Vin1 is output; the second comparison control module 140 is respectively connected to the second power supply Vin2, the first power input module 110 and the second power input module 130, and is used to output second level signals of different states according to the comparison result of the first voltage and the second voltage to control whether the second power supply Vin2 is output.
[0049] In order to better understand the dual power supply redundant hot backup circuit 100, the following describes in detail the various components of the dual power supply redundant hot backup circuit 100. Figure 4 , is a circuit diagram of a dual power supply redundant hot backup circuit 100 provided in an embodiment of the present application.
[0050] In one embodiment, the first power input module 110 and the second power input module 130 both include a switching tube; the first power input module 110 is also used to control the switching tube to be turned on or off according to the level state of the first level signal; the second power input module 130 is also used to control the switching tube to be turned on or off according to the level state of the second level signal.
[0051] Specifically, the first power input module 110 includes a first switch tube, which is connected to the first power supply Vin1 to control the output of the first power supply Vin1. The second power input module 130 includes a second switch tube, which is connected to the second power supply Vin2 to control the output of the second power supply Vin2.
[0052] Exemplarily, the first comparison control module 120 is connected to the first switch tube to output a first control signal of different level states to control the first switch tube to be turned on or off; the second comparison control module 140 is connected to the second switch tube to output a second control signal of different level states to control the second switch tube to be turned on or off.
[0053] For example, in one embodiment, the first comparison control module 120 is further used to output a first-level signal in a first-level state to turn on the switch tube when the first voltage is greater than the second voltage; the first comparison control module 120 is further used to output a first-level signal in a second-level state to turn off the switch tube when the first voltage is less than the second voltage; the first comparison control module 120 is further used to continuously output a first-level signal in a first-level state or a second-level state to continuously turn on or off the switch tube when the first voltage is equal to the second voltage.
[0054] For example, in one embodiment, the second comparison control module 140 is further used to output a second-level signal in a first-level state when the second voltage is greater than the first voltage to turn on the switch tube; the second comparison control module 140 is further used to output a second-level signal in a second-level state when the second voltage is less than the first voltage to turn off the switch tube; the second comparison control module 140 is further used to continuously output a second-level signal in a first-level state or a second-level state when the second voltage is equal to the first voltage to continuously turn on or turn off the switch tube.
[0055] In one embodiment, the first comparison control module 120 and the second comparison control module 140 both include a first current limiting resistor R1, a second current limiting resistor R2, a third current limiting resistor R3, a pull-up resistor R4, and an operational amplifier; the first end of the first current limiting resistor R1 is respectively connected to the first power supply Vin1 or the second power supply Vin2, and the first end of the switch tube, and the second end of the first current limiting resistor R1 is connected to the inverting input end of the operational amplifier; the non-inverting input end of the operational amplifier is connected to the first end of the second current limiting resistor R2, the second end of the second current limiting resistor R2 is connected to the second end of the switch tube, the positive power supply end of the operational amplifier is connected to the second end of the switch tube, and the negative power supply end of the operational amplifier is grounded; the output end of the operational amplifier is respectively connected to the first end of the pull-up resistor R4 and the first end of the third current limiting resistor R3, the second end of the pull-up resistor R4 is connected to the second end of the switch tube, and the second end of the third current limiting resistor R3 is connected to the third end of the switch tube.
[0056] Optionally, the switch tube is a field-effect transistor or a triode. When the switch tube is a field-effect transistor, the drain of the field-effect transistor is respectively connected to the first power supply Vin1 or the second power supply Vin2, and the first end of the first current-limiting resistor R1, the gate of the field-effect transistor is respectively connected to the second end of the third current-limiting resistor R3, and the source of the field-effect transistor is connected to the inverting input terminal of the operational amplifier. When the switch tube is a triode, the emitter of the triode is respectively connected to the first power supply Vin1 or the second power supply Vin2, and the first end of the first current-limiting resistor R1, the base of the triode is connected to the second end of the third current-limiting resistor R3, and the collector of the triode is connected to the inverting input terminal of the operational amplifier.
[0057] Optionally, the first comparison control module 120 and the second comparison control module 140 replace the operational amplifier with a microcontroller, wherein the input end of the microcontroller is respectively connected to the first power supply Vin1 or the second power supply Vin2, and the first power input module 110 or the second power input module 130, and the output end of the microcontroller is connected to the switch tube; after the two input voltage signals enter the microcontroller, they are converted into digital signals through analog-to-digital conversion and then output as digital signals, which can realize the on-off function of controlling the switch tube.
[0058] I understand. Figure 4 The specific circuit structure shown is only a feasible example. In actual application, the first field effect transistor Q1 and the first field effect transistor Q2 can be replaced by a first transistor and a second transistor, and the first operational amplifier OP1 and the second operational amplifier OP2 can be replaced by a first microcontroller and a second microcontroller.
[0059] Specifically, when the first voltage of the first power supply Vin1 is greater than the second voltage of the second power supply Vin2, the first field-effect transistor Q1 is turned on; because the positive input voltage of the second operational amplifier OP2 is greater than the negative input voltage, the second operational amplifier OP2 outputs a second-level signal in a second-level state, causing the gate potential of the second field-effect transistor Q2 to be lower than the source potential, and the second field-effect transistor Q2 switches from an on state to an off state. When the second voltage of the second power supply Vin2 is greater than the first voltage of the first power supply Vin1, the second field-effect transistor Q2 is turned on; because the positive input voltage of the first operational amplifier OP1 of the first power input module 110 is greater than the negative input voltage, the first operational amplifier OP1 outputs a first-level signal in a second-level state, causing the gate potential of the first field-effect transistor Q1 to be lower than the source potential, and the first field-effect transistor Q1 switches from an on state to an off state.
[0060] In one embodiment, the load LOAD includes a filter capacitor C1; a first parallel node between the filter capacitor C1 and the load LOAD is connected to the output ends of the first power input module 110 and the second power input module 130, and a second parallel node between the filter capacitor C1 and the load LOAD is grounded.
[0061] The present application also provides an electronic device, which may be a communications device such as a switch, router, or gateway. Exemplarily, the dual-power supply redundant hot backup device includes a first power supply Vin1, a second power supply Vin2, and a dual-power supply redundant hot backup circuit 100 as described in any of the above embodiments. The first power supply Vin1 and the second power supply Vin2 are respectively connected to the dual-power supply redundant hot backup circuit 100.
[0062] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.
Claims
1. A dual power supply redundant hot backup circuit, characterized in that: include: a first power input module, a first comparison control module, a second power input module, and a second comparison control module; The first power input module is electrically connected to a first power source and is configured to output a first voltage; The second power input module is electrically connected to a second power source and is configured to output a second voltage; The output ends of the first power input module and the second power input module are used to be commonly connected to a load, so that the first voltage and / or the second voltage are used as the power supply voltage of the load; The first comparison control module is connected to the first power supply, the first power input module and the second power input module respectively, and is used to output first level signals of different states according to the comparison result of the first voltage and the second voltage to control whether the first power supply is output; The second comparison control module is respectively connected to the second power supply, the first power input module and the second power input module, and is used to output second level signals of different states according to the comparison results of the first voltage and the second voltage to control whether the second power supply is output.
2. The dual power supply redundant hot backup circuit according to claim 1, characterized in that: Each of the power input modules includes a switch tube; The first power input module is further configured to control the switch tube to be turned on or off according to the level state of the first level signal; The second power input module is further configured to control the switch tube to be turned on or off according to the level state of the second level signal.
3. The dual power supply redundant hot backup circuit according to claim 2, characterized in that: The first comparison control module is further configured to output the first level signal in a first level state to turn on the switch tube when the first voltage is greater than the second voltage; The first comparison control module is further configured to output the first level signal in a second level state to turn off the switch tube when the first voltage is lower than the second voltage; The first comparison control module is further configured to, when the first voltage is equal to the second voltage, continuously output the first level signal in a first level state or a second level state, so as to keep the switch tube continuously turned on or turned off.
4. The dual power supply redundant hot backup circuit according to claim 2, characterized in that: The second comparison control module is further configured to output the second level signal in the first level state when the second voltage is greater than the first voltage, so as to turn on the switch tube; The second comparison control module is further configured to output a second level signal in a second level state to turn off the switch tube when the second voltage is lower than the first voltage; The second comparison control module is further configured to, when the second voltage is equal to the first voltage, continuously output the second level signal in the first level state or the second level state, so as to keep the switch tube continuously turned on or turned off.
5. The dual power supply redundant hot backup circuit according to claim 2, characterized in that: The first comparison control module and the second comparison control module each include a first current limiting resistor, a second current limiting resistor, a third current limiting resistor, a pull-up resistor and an operational amplifier; The first end of the first current limiting resistor is connected to the first power supply or the second power supply and the first end of the switch tube respectively, and the second end of the first current limiting resistor is connected to the inverting input end of the operational amplifier; The non-inverting input terminal of the operational amplifier is connected to the first terminal of the second current limiting resistor, the second terminal of the second current limiting resistor is connected to the second terminal of the switch tube, the positive power supply terminal of the operational amplifier is connected to the second terminal of the switch tube, and the negative power supply terminal of the operational amplifier is grounded; The output end of the operational amplifier is respectively connected to the first end of the pull-up resistor and the first end of the third current limiting resistor, the second end of the pull-up resistor is connected to the second end of the switch tube, and the second end of the third current limiting resistor is connected to the third end of the switch tube.
6. The dual power supply redundant hot backup circuit according to claim 5, characterized in that: The switch tube is a field effect transistor or a triode.
7. The dual power supply redundant hot backup circuit according to claim 5, characterized in that: The operational amplifiers in the first comparison control module and the second comparison control module are replaced by microcontrollers.
8. The dual power supply redundant hot backup circuit according to claim 1, characterized in that: The load includes a filter capacitor; A first parallel node between the filter capacitor and the load is connected to the output ends of the first power input module and the second power input module, and a second parallel node between the filter capacitor and the load is grounded.
9. An electronic device, characterized in that: It comprises the dual power supply redundant hot backup circuit as claimed in any one of claims 1 to 8.
10. The electronic device according to claim 9, characterized in that It also includes a first power supply and a second power supply, wherein the first power supply and the second power supply are respectively connected to the dual-power supply redundant hot backup circuit.