Three-power-supply power supply circuit capable of automatically switching power supply
By designing an automatic switching three-power supply circuit, which utilizes relays and alarm circuits to achieve automatic power switching, the problem of power supply failure in the event of backup circuit failure in existing technologies is solved. This reduces equipment costs, simplifies maintenance, and ensures the continuity and stability of the equipment's power supply.
Patent Information
- Application Number
- CN202520528810.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Existing power supply switching circuits cannot continue to supply power when the backup circuit fails, and their reliance on controllers leads to high costs, complex algorithms, and difficult maintenance.
A power supply circuit was designed, which includes three independent power supplies and multiple dual-power automatic transfer switches. Automatic power switching is achieved through relays and alarm circuits, and real-time monitoring is performed using voltmeters and ammeters, thereby reducing costs and simplifying control.
It enables automatic switching to backup power in the event of a power failure, ensuring the continuity and stability of power supply to the equipment, reducing equipment costs and simplifying the maintenance process.
Smart Images
Figure CN224006531U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power supply control technology, and specifically discloses a three-power supply circuit that can automatically switch power supplies. Background Technology
[0002] For some devices that have high requirements for power quality, such as servers and generators, a backup power supply is usually required to ensure that they are protected in time during power fluctuations or interruptions and to avoid equipment damage or data loss due to power problems.
[0003] Power supply switching circuits can ensure that critical equipment can quickly switch to backup power when the main power supply fails, ensuring the continuity and stability of power supply. However, current power supply switching circuits only involve switching between the main circuit and the backup circuit. They cannot provide further power to the equipment when the backup circuit fails. There are also some switching circuits that can switch between three power supplies, but they rely on controllers for control, which is costly, has complex algorithms, and has high maintenance costs during debugging and operation. Therefore, the inventors have provided a three-power supply circuit that can automatically switch power supplies to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a three-power supply circuit that is low in equipment cost, easy to control and maintain, and can automatically switch power supplies to ensure the continuity and stability of power supply to electrical equipment.
[0005] To achieve the above objectives, the basic solution of this utility model provides a three-power supply circuit capable of automatically switching power supplies, comprising:
[0006] The power supply circuit includes three independent power supplies: a first power supply, a second power supply, and a third power supply.
[0007] The switching circuit includes a first dual-power automatic transfer switch and a second dual-power automatic transfer switch. One input terminal of the first dual-power automatic transfer switch is connected to a first power source. The two input terminals of the second dual-power automatic transfer switch are respectively connected to a second power source and a third power source. The output terminal of the second dual-power automatic transfer switch is connected to the other input terminal of the first dual-power automatic transfer switch.
[0008] The output circuit is connected to the output terminal of the first dual-power automatic transfer switch.
[0009] Furthermore, the first power supply, the second power supply, and the third power supply are all connected to relays, and the relays are respectively connected to the control terminal of the first dual power supply automatic transfer switch or the first dual power supply automatic transfer switch in the switching circuit.
[0010] Furthermore, it also includes an alarm circuit, which includes an alarm connected to a first power supply, a second power supply, and a third power supply respectively, and the power supply circuit also includes a UPS power supply that supplies power to the alarm circuit.
[0011] Furthermore, the alarm is connected to the normally closed port of the relay, and the UPS power supply is connected to the common terminal of the relay.
[0012] Furthermore, it also includes a detection circuit, which includes a voltmeter and an ammeter connected to a first power supply, a second power supply, and a third power supply, respectively.
[0013] Furthermore, the switching circuit also includes a third dual-power automatic transfer switch and a fourth dual-power automatic transfer switch. The input terminal of the third dual-power automatic transfer switch is connected to the first power supply and the second power supply respectively, and the input terminal of the fourth dual-power automatic transfer switch is connected to the second power supply and the output terminal of the third dual-power automatic transfer switch respectively.
[0014] The output circuit includes a first output power supply connected to the output terminal of a first dual-power automatic transfer switch and a second output power supply connected to the output terminal of a fourth dual-power automatic transfer switch.
[0015] The principle and effect of this solution are as follows:
[0016] Compared with the prior art, this utility model, by setting a first dual-power automatic transfer switch and a second dual-power automatic transfer switch, enables automatic switching to the second power supply when the first power supply fails and provides an alarm indication. Furthermore, when the second power supply fails, it automatically switches to the third power supply and provides an alarm indication. The inclusion of a third and fourth dual-power automatic transfer switch in this utility model allows for switching and alarming between the first and second output power supplies. This utility model is low-cost, easy to control and maintain, and can automatically switch power supplies, ensuring the continuity and stability of power supply to electrical equipment. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.
[0018] Figure 1 A schematic diagram of a three-power supply circuit capable of automatically switching power supplies, as proposed in Embodiment 1 of this application, is shown.
[0019] Figure 2A schematic diagram of a three-power supply circuit capable of automatically switching power supplies, as proposed in Embodiment 2 of this application, is shown.
[0020] Figure 3 The diagram shows a relay wiring schematic in a three-power supply circuit with automatic power switching according to an embodiment of this application. Detailed Implementation
[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0022] The reference numerals in the accompanying drawings include: power supply circuit 1, detection circuit 2, alarm circuit 3, relay 4, current coil 5, switch circuit 6, output circuit 7, UPS power supply 8, ground wire 9.
[0023] A three-power supply circuit capable of automatically switching power supplies, as shown in Embodiment 1. Figure 1 As shown, it includes:
[0024] Power circuit 1: includes three independent power supplies: a first power supply A, a second power supply B, and a third power supply C. The first power supply A, the second power supply B, and the third power supply C are any one of the following: UPS power supply, generator power supply, and mains power supply, which can be adjusted according to the usage environment. The first power supply A, the second power supply B, and the third power supply C are connected to three relays 4, namely the first power supply relay a, the second power supply relay b, and the third power supply relay c.
[0025] Alarm circuit 3 includes an alarm connected to a first power supply A, a second power supply B, and a third power supply C respectively via a first power relay a, a second power relay b, and a third power relay c. The power supply circuit 1 also includes a UPS power supply 8 that supplies power to the alarm circuit.
[0026] Detection circuit 2 includes a voltmeter and an ammeter connected to the first power supply A, the second power supply B, and the third power supply C respectively through a current coil 5.
[0027] Switching circuit 6 includes multiple dual-power automatic transfer switches, specifically a first dual-power automatic transfer switch AD, a second dual-power automatic transfer switch BC, a third dual-power automatic transfer switch AC, and a fourth dual-power automatic transfer switch BD. One input terminal of the first dual-power automatic transfer switch AD is connected to the first power supply A. The two input terminals of the second dual-power automatic transfer switch BC are connected to the second power supply B and the third power supply C, respectively. The output terminal of the second dual-power automatic transfer switch BC is connected to the other input terminal of the first dual-power automatic transfer switch AD. The input terminals of the third dual-power automatic transfer switch AC are connected to the first power supply A and the second power supply B, respectively. The input terminals of the fourth dual-power automatic transfer switch BD are connected to the second power supply B and the output terminal of the third dual-power automatic transfer switch AC, respectively. The control terminal of the first power relay a is connected to the third dual-power automatic transfer switch AC, and the control terminals of the second power relay b and the third power relay c are connected to the second dual-power automatic transfer switch BC, respectively.
[0028] Output circuit 7 includes a first output power supply E1 connected to the output terminal of the first dual power automatic transfer switch and a second output power supply E2 connected to the output terminal of the fourth dual power automatic transfer switch. The main purpose of the first output power supply E1 and the second output power supply E2 is to be set according to the site requirements. For example, if the toll collection site requires two UPS power supplies and one mains power supply, the UPS power supply will be output to the corresponding lane according to the power consumption to avoid the problem that the UPS output voltage is too high and cannot support the longer time when there is a power outage.
[0029] like Figure 3 As shown, alarm circuit 3 is connected to the normally closed port of relay 4, and UPS power supply 8 is connected to the common terminal of relay 4.
[0030] The three power supply circuits are integrated into one distribution cabinet and grounded by grounding wire 9. The display panels of the voltmeter and ammeter are located outside the distribution cabinet for easy observation by staff.
[0031] In this embodiment, the first power supply A is the main power supply, the second power supply B is the primary backup power supply, and the third power supply C is the secondary backup power supply. When the first power supply A fails, the system switches to the second power supply B and triggers an alarm. When both the first power supply A and the second power supply B fail, the system switches to the third power supply C and triggers an alarm, ensuring uninterrupted operation of the equipment. The coordinated operation of the first dual-power automatic transfer switch AD, the second dual-power automatic transfer switch BC, the third dual-power automatic transfer switch AC, and the fourth dual-power automatic transfer switch BD enables simultaneous switching of power supply to the first output power supply E1 and the second output power supply E2. Furthermore, voltmeters and ammeters are used to monitor and display the status of the first power supply A, the second power supply B, and the third power supply C in real time.
[0032] A three-power supply circuit capable of automatically switching power supplies, as shown in Embodiment Two. Figure 2 As shown, it includes:
[0033] Power circuit 1: includes three independent power supplies: a first power supply A, a second power supply B, and a third power supply C. The first power supply A, the second power supply B, and the third power supply C are any one of the following: UPS power supply, generator power supply, and mains power supply, which can be adjusted according to the usage environment. The first power supply A, the second power supply B, and the third power supply C are connected to three relays 4, namely the first power supply relay a, the second power supply relay b, and the third power supply relay c.
[0034] Alarm circuit 3 includes an alarm connected to a first power supply A, a second power supply B, and a third power supply C respectively via a first power relay a, a second power relay b, and a third power relay c. The power supply circuit 1 also includes a UPS power supply 8 that supplies power to the alarm circuit.
[0035] Detection circuit 2 includes a voltmeter and an ammeter connected to the first power supply A, the second power supply B, and the third power supply C respectively through a current coil 5.
[0036] Switching circuit: includes multiple dual-power automatic transfer switches, specifically a first dual-power automatic transfer switch AD and a second dual-power automatic transfer switch BC. One input terminal of the first dual-power automatic transfer switch AD is connected to the first power supply A. The two input terminals of the second dual-power automatic transfer switch BC are respectively connected to the second power supply B and the third power supply C. The output terminal of the second dual-power automatic transfer switch BC is connected to the other input terminal of the first dual-power automatic transfer switch AD. The first power relay a is connected to the control terminal of the first dual-power automatic transfer switch AD. The second power relay b and the third power relay c are connected to the control terminal of the second dual-power automatic transfer switch BC.
[0037] Output circuit 7: includes a first output power supply E1 connected to the output terminal of the first dual power supply automatic transfer switch.
[0038] like Figure 3 As shown, alarm circuit 3 is connected to the normally closed port of relay 4, and UPS power supply 8 is connected to the common terminal of relay 4.
[0039] The three power supply circuits are integrated into one distribution cabinet and grounded by grounding wire 9. The display panels of the voltmeter and ammeter are located outside the distribution cabinet for easy observation by staff.
[0040] In this embodiment, the first power supply A is the main power supply, the second power supply B is the primary backup power supply, and the third power supply C is the secondary backup power supply. When the first power supply A fails, it switches to the second power supply B and triggers an alarm. When both the first power supply A and the second power supply B fail, it switches to the third power supply C and triggers an alarm, ensuring uninterrupted operation of the equipment. The first dual-power automatic transfer switch AD and the second dual-power automatic transfer switch BC enable three-power supply switching for the first output power supply E1. Simultaneously, voltmeters and ammeters monitor and display the real-time status of the first power supply A, the second power supply B, and the third power supply C.
[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A three-power supply circuit capable of automatically switching power supplies, characterized in that, include: The power supply circuit includes three independent power supplies: a first power supply, a second power supply, and a third power supply. The switching circuit includes a first dual-power automatic transfer switch and a second dual-power automatic transfer switch. One input terminal of the first dual-power automatic transfer switch is connected to a first power source. The two input terminals of the second dual-power automatic transfer switch are respectively connected to a second power source and a third power source. The output terminal of the second dual-power automatic transfer switch is connected to the other input terminal of the first dual-power automatic transfer switch. The output circuit is connected to the output terminal of the first dual-power automatic transfer switch.
2. The three-power supply circuit with automatic power switching according to claim 1, characterized in that, The first power supply, the second power supply, and the third power supply are all connected to relays, and the relays are respectively connected to the first dual power supply automatic transfer switch or the control terminal of the first dual power supply automatic transfer switch in the switching circuit.
3. A three-power supply circuit capable of automatically switching power supplies according to claim 2, characterized in that, It also includes an alarm circuit, which includes an alarm connected to a first power supply, a second power supply and a third power supply respectively, and the power supply circuit also includes a UPS power supply that supplies power to the alarm circuit.
4. A three-power supply circuit capable of automatically switching power supplies according to claim 3, characterized in that, The alarm is connected to the normally closed port of the relay, and the UPS power supply is connected to the common terminal of the relay.
5. A three-power supply circuit capable of automatically switching power supplies according to claim 1, characterized in that, It also includes a detection circuit, which includes a voltmeter and an ammeter connected to a first power supply, a second power supply, and a third power supply, respectively.
6. A three-power supply circuit capable of automatically switching power supplies according to claim 1, characterized in that, The switching circuit also includes a third dual-power automatic transfer switch and a fourth dual-power automatic transfer switch. The input terminal of the third dual-power automatic transfer switch is connected to the first power supply and the second power supply respectively, and the input terminal of the fourth dual-power automatic transfer switch is connected to the second power supply and the output terminal of the third dual-power automatic transfer switch respectively. The output circuit includes a first output power supply connected to the output terminal of a first dual-power automatic transfer switch and a second output power supply connected to the output terminal of a fourth dual-power automatic transfer switch.