A master-slave two-way same-phase sequence alternating current fast seamless switching output control device
Patent Information
- Application Number
- CN202522320398.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-01
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-11-01
AI Technical Summary
[0003]本申请实施例提供了一种主备两路同相序交流电快速无缝切换输出控制装置，以解决无法满足高可靠性供电需求的问题
[0010]The beneficial effects of the fast and seamless switching output control device for primary and backup two-way AC power supply with the same phase sequence provided in this application embodiment are as follows: Firstly, the first and second auxiliary power supplies of this application embodiment are connected to the primary and backup power supplies respectively and supply power to the main control module. This avoids interruption of a single auxiliary power supply due to a power failure in the corresponding power supply circuit, ensuring continuous operation of the main control module and providing stable protection for switching control. Secondly, the power failure monitoring module simultaneously monitors the primary and backup power supplies, enabling rapid and accurate determination of the power failure type and feedback to the main control module, reducing invalid switching caused by misjudgments. Finally, the main control module controls the switching control module based on the monitoring signals. Combined with the in-phase sequence characteristics of the primary and backup power supplies, fast and seamless switching can be achieved, preventing power interruptions from affecting output equipment. The overall design requires no manual intervention, improving power supply reliability, ensuring stable operation of equipment, and reducing maintenance costs.
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Figure CN224862851U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power supply control technology, and in particular to a fast and seamless switching output control device for main and backup two-way AC power with the same phase sequence. Background Technology
[0002] In scenarios with extremely high requirements for AC power continuity, such as industrial production, medical equipment, and emergency power supply, it is often necessary to configure dual power supplies (primary and backup) to prevent equipment downtime, data loss, or functional failure due to a single power supply interruption. However, existing primary / backup power switching devices have significant drawbacks: First, auxiliary power supplies often rely on a single-path design. If the corresponding primary or backup power supply fails, the auxiliary power supply is easily interrupted, causing the main control unit to lose power and fail to trigger the switching, directly resulting in a power supply gap. Second, power failure monitoring often only targets the primary path, or the monitoring response is slow and prone to misjudgment. It either fails to detect backup power supply failures in a timely manner or mistakenly triggers the switching operation, affecting power supply stability. These shortcomings ultimately fail to meet the requirements for high-reliability power supply. Utility Model Content
[0003] This application provides a fast and seamless switching output control device for two main and backup AC power supplies with the same phase sequence, in order to solve the problem of not being able to meet the requirements for high-reliability power supply.
[0004] This application provides a fast and seamless switching output control device for two main and backup AC power supplies with the same phase sequence, including: a first auxiliary power supply, a second auxiliary power supply, a switching control module, a main control module, and a power failure monitoring module; The first end of the switching control module is used to connect to the main power supply, the second end of the switching control module is used to connect to the backup power supply, the third end of the switching control module is used to output the power supply voltage, and the control end of the switching control module is connected to the main control module. The first end of the power failure monitoring module is connected to the main power supply, the second end of the power failure monitoring module is connected to the backup power supply, and the output end of the power failure monitoring module is connected to the main control module. The first terminal of the first auxiliary power supply is connected to the main control module, the second terminal of the first auxiliary power supply is connected to the main power supply, the first terminal of the second auxiliary power supply is connected to the main control module, and the second terminal of the second auxiliary power supply is connected to the backup power supply.
[0005] In one exemplary embodiment of this application, it further includes: a buzzer; The buzzer is connected to the main control module.
[0006] In one exemplary embodiment of this application, the switching control module includes: a switch Q1, a relay RLY1, a switch Q2, and a relay RLY2; The control terminal of the switching transistor Q1 is connected to the main control module. The first terminal of the switching transistor Q1 is connected to the first input terminal of the relay RLY1. The second input terminal of the relay RLY1 is connected to the VCC power supply. The second terminal of the switching transistor Q1 is grounded. The first terminal of the relay RLY1 is connected to the live wire of the main power supply. The second terminal of the relay RLY1 is used to output the power supply voltage. The control terminal of the switching transistor Q2 is connected to the main control module. The first terminal of the switching transistor Q2 is connected to the first input terminal of the relay RLY2. The second input terminal of the relay RLY2 is connected to the VCC power supply. The second terminal of the switching transistor Q2 is grounded. The first terminal of the relay RLY2 is connected to the live wire of the backup power supply. The second terminal of the relay RLY2 is used to output the power supply voltage.
[0007] In one exemplary embodiment of this application, the switching control module further includes: a silicon controlled rectifier (SCR1) and a silicon controlled rectifier (SCR2); The control terminals of both SCR1 and SCR2 are connected to the main control module. The first anode of SCR1 is connected to the live wire of the main power supply, and the second anode of SCR1 is used to output the power supply voltage. The first anode of the SCR2 is connected to the live wire of the backup power supply, and the second anode of the SCR2 is used to output the power supply voltage.
[0008] In one exemplary embodiment of this application, the switching control module further includes: diode D5 and diode D2; The anode of diode D2 is connected to the first input terminal of relay RLY1, and the cathode of diode D2 is connected to the second input terminal of relay RLY1. The anode of diode D5 is connected to the first input terminal of relay RLY2, and the cathode of diode D5 is connected to the second input terminal of relay RLY2.
[0009] In one exemplary embodiment of this application, the power loss monitoring module includes: resistor R1, resistor R10, and current sensor L1; The first terminal of current sensor L1 is connected to the second terminals of relays RLY1 and RLY2 respectively, and the second terminal of current sensor L1 outputs the power supply voltage. The first output terminal of the current sensor L1 is connected to the first terminal of the resistor R1 through the resistor R10. The second terminal of the resistor R1 is connected to the second output terminal of the current sensor L1. The second output terminal of the current sensor L1 is grounded. The first terminal of the resistor R1 is connected to the main control module.
[0010] The beneficial effects of the fast and seamless switching output control device for primary and backup two-way AC power supply with the same phase sequence provided in this application embodiment are as follows: Firstly, the first and second auxiliary power supplies of this application embodiment are connected to the primary and backup power supplies respectively and supply power to the main control module. This avoids interruption of a single auxiliary power supply due to a power failure in the corresponding power supply circuit, ensuring continuous operation of the main control module and providing stable protection for switching control. Secondly, the power failure monitoring module simultaneously monitors the primary and backup power supplies, enabling rapid and accurate determination of the power failure type and feedback to the main control module, reducing invalid switching caused by misjudgments. Finally, the main control module controls the switching control module based on the monitoring signals. Combined with the in-phase sequence characteristics of the primary and backup power supplies, fast and seamless switching can be achieved, preventing power interruptions from affecting output equipment. The overall design requires no manual intervention, improving power supply reliability, ensuring stable operation of equipment, and reducing maintenance costs. Attached Figure Description
[0011] 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.
[0012] Figure 1 This is a schematic diagram of the structure of a fast and seamless switching output control device for main and backup two-way AC power in phase sequence provided in an embodiment of this application; Figure 2 This is a circuit diagram of a fast and seamless switching output control device for two main and backup AC power supplies with the same phase sequence, provided in an embodiment of this application. Detailed Implementation
[0013] 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.
[0014] 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.
[0015] The implementation of this application will be described in detail below with reference to the specific accompanying drawings: Figure 1This is a schematic diagram of a fast and seamless switching output control device for primary and backup two-channel AC power supplies with the same phase sequence, provided as an embodiment of this application. (Refer to...) Figure 1 The main and backup two-channel in-phase sequence AC power fast and seamless switching output control device includes: The system comprises a first auxiliary power supply, a second auxiliary power supply, a switching control module, a main control module, and a power failure monitoring module. The first end of the switching control module is used to connect to the main power supply, the second end of the switching control module is used to connect to the backup power supply, the third end of the switching control module is used to output the power supply voltage, and the control end of the switching control module is connected to the main control module. The first end of the power failure monitoring module is connected to the main power supply, the second end of the power failure monitoring module is connected to the backup power supply, and the output end of the power failure monitoring module is connected to the main control module. The first terminal of the first auxiliary power supply is connected to the main control module, the second terminal of the first auxiliary power supply is connected to the main power supply, the first terminal of the second auxiliary power supply is connected to the main control module, and the second terminal of the second auxiliary power supply is connected to the backup power supply.
[0016] In this embodiment, the main power supply and the backup power supply are AC power of the same phase sequence. By default, the main power supply is input through the first terminal of the switching control module and output through its third terminal to provide power to the output devices. At the same time, the first auxiliary power supply is connected to the main power supply through its second terminal, and the second auxiliary power supply is connected to the backup power supply through its second terminal. Together, they provide isolated 12V and 3.3V power supplies to the main control module to ensure stable operation of the main control module. The first and second terminals of the power failure monitoring module are connected to the main power supply and the backup power supply, respectively. It can quickly determine the type of power failure (main power failure or backup power failure) and transmit the power failure monitoring signal to the main control module. After receiving the signal, the main control module identifies the type of power failure. If the main power supply fails, it quickly sends a command to the control terminal of the switching control module to control the switching control module to switch to the backup power supply. The backup power supply is input through its second terminal and output through its third terminal to achieve seamless power supply to the output devices. If the backup power supply fails, the main control module does not send a switching command to the switching control module (maintaining the output of the main power supply). At this time, an alarm can be triggered. The response time of the entire device can be controlled within 10ms, which has no impact on the output equipment. When the main power supply is restored to normal, the device can also automatically control the switching control module to switch back to the main power supply output, and continue to supply power to the output equipment from the main power supply.
[0017] As can be seen from the above, in this embodiment, the first auxiliary power supply and the second auxiliary power supply are connected to the main circuit and the backup power supply, respectively, and supply power to the main control module. This avoids the interruption of a single auxiliary power supply due to the power failure of the corresponding power supply circuit, ensuring the continuous operation of the main control module and providing stable protection for switching control. Secondly, the power failure monitoring module monitors the main and backup power supplies simultaneously, and can quickly and accurately determine the type of power failure and feed it back to the main control module, reducing invalid switching caused by misjudgment. Finally, the main control module controls the switching control module based on the monitoring signals. Combined with the in-phase sequence characteristics of the main and backup circuits, fast and seamless switching can be achieved, avoiding the impact of power interruption on output equipment. The overall design requires no manual intervention, which not only improves power supply reliability and ensures stable operation of equipment, but also reduces operation and maintenance costs.
[0018] In one embodiment of this disclosure, it further includes: a buzzer; The buzzer is connected to the main control module.
[0019] In this embodiment, after receiving the signal, the main control module first identifies the type of power outage. If the main power supply fails, it sends a command to the control terminal of the switching control module to switch from main power supply - third-end output to backup power supply - third-end output, achieving seamless power supply switching. On the other hand, it triggers the connected buzzer to issue an alarm, reminding maintenance personnel of the main power supply failure. If the backup power supply fails, the main control module does not send a switching command to the switching control module (maintaining the main power supply output), but only triggers the buzzer to issue an alarm, indicating an abnormality in the backup power supply. When the main power supply is restored, the main control module controls the switching control module to switch back to the main power supply output. At the same time, it can issue a recovery alarm through the buzzer as needed, ensuring that there is no power interruption for the output equipment throughout the process, and promptly reporting power supply abnormalities through the buzzer, facilitating rapid troubleshooting.
[0020] In one embodiment of this disclosure, the switching control module includes: a switch Q1, a relay RLY1, a switch Q2, and a relay RLY2; The control terminal of the switching transistor Q1 is connected to the main control module. The first terminal of the switching transistor Q1 is connected to the first input terminal of the relay RLY1. The second input terminal of the relay RLY1 is connected to the VCC power supply. The second terminal of the switching transistor Q1 is grounded. The first terminal of the relay RLY1 is connected to the live wire of the main power supply. The second terminal of the relay RLY1 is used to output the power supply voltage. The control terminal of the switching transistor Q2 is connected to the main control module. The first terminal of the switching transistor Q2 is connected to the first input terminal of the relay RLY2. The second input terminal of the relay RLY2 is connected to the VCC power supply. The second terminal of the switching transistor Q2 is grounded. The first terminal of the relay RLY2 is connected to the live wire of the backup power supply. The second terminal of the relay RLY2 is used to output the power supply voltage.
[0021] In this embodiment, firstly, the first auxiliary power supply draws power from the main power supply, and the second auxiliary power supply draws power from the backup power supply, jointly providing stable power to the main control module to ensure its control function. The power failure monitoring module monitors the status of the main power supply (via its first terminal) and the backup power supply (via its second terminal) in real time and feeds back the power failure signal to the main control module. In the switching control module, during normal operation, the main control module sends a high-level signal to the control terminal of switch Q1 to turn it on, and sends a low-level signal to the control terminal of switch Q2 to turn it off. After switch Q1 is turned on, the first input terminal of relay RLY1 is energized (the second input terminal is connected to the VCC power supply), and RLY1 is energized and engaged. The live wire of the main power supply is transmitted through the first and second terminals of RLY1 to the output of the third terminal of the switching control module to supply power to the electrical equipment. At this time, relay RLY2 does not operate because switch Q2 is turned off and there is no power supply. When the power failure monitoring module detects a main power failure, it transmits a signal to the main control module. The main control module immediately adjusts the signal level: it sends a low level to Q1 to cut off (RLY1 loses power and disconnects the main power), and sends a high level to Q2 to turn it on (RLY2 is energized and engaged). The backup power supply wire is switched to the output terminal via the first and second terminals of RLY2, achieving seamless switching by combining the main and backup phase sequence characteristics. When the main power is restored, the main control module adjusts the level in the opposite direction to switch back to the main power supply. At the same time, if the device contains a buzzer, the main control module will trigger an alarm to indicate the fault and recovery status, ensuring continuous and uninterrupted power supply throughout the process.
[0022] As can be seen from the above, the main control module of this embodiment precisely controls the switching transistor to be turned on or off through level signals, thereby controlling the relay to be turned on or off. The response speed is fast, which helps to achieve rapid switching. Moreover, the main and backup relays are independently controlled to avoid mutual interference and reduce the risk of false switching. At the same time, the relays are directly connected to the power supply live wire and the output terminal, ensuring a stable path. Combined with the main and backup phase sequence characteristics, it can effectively ensure seamless switching and avoid power interruption or impact on electrical equipment.
[0023] In one embodiment of this disclosure, the switching control module further includes: a silicon controlled rectifier (SCR1) and a silicon controlled rectifier (SCR2); The control terminals of both SCR1 and SCR2 are connected to the main control module. The first anode of SCR1 is connected to the live wire of the main power supply, and the second anode of SCR1 is used to output the power supply voltage. The first anode of the SCR2 is connected to the live wire of the backup power supply, and the second anode of the SCR2 is used to output the power supply voltage.
[0024] In this embodiment, during normal main power supply, the main control module controls both thyristors SCR1 and SCR2 to be cut off, and simultaneously sends a high-level signal to switch Q1 to turn it on. Relay RLY1 is energized and engages, and the main power supply is stably output to the power-consuming equipment through the first and second terminals of RLY1. When the power failure monitoring module detects a main power failure and feeds back to the main control module, because the switching speed of the thyristors is faster than the engagement speed of the relay, the main control module first sends a control signal to the control terminal of SCR2 to turn it on. The backup power supply is then quickly transitioned and output through the first and second anodes of SCR2. To avoid power interruption, the main control module sends a high-level signal to switch Q2 to turn it on, energizing relay RLY2. Once RLY2 is stably energized, the main control module sends a low-level signal to the SCR2 control terminal to turn it off, switching the backup power supply to stable output via RLY2. When the main power supply is restored, the main control module, following the same logic, first controls SCR1 to turn on to achieve a transitional output from the main power supply, then triggers RLY1 to turn on and SCR1 to turn off, switching back to stable main power supply. Throughout the process, the cooperation between the thyristor and the relay further improves the switching speed and ensures seamless power supply.
[0025] As can be seen from the above, the switching control module in this embodiment adds SCR1 and SCR2, whose control terminals are connected to the main control module and respectively connected to the main and backup power lines and the output terminal. Because the SCRs switch quickly, they can quickly conduct to achieve power transition during main / backup switching, greatly shortening the switching gap. Combined with the subsequent stable power supply from the relay, this effectively avoids power interruption impact, improves seamless switching, and ensures continuous and stable operation of electrical equipment.
[0026] In one embodiment of this disclosure, the switching control module further includes: diode D5 and diode D2; The anode of diode D2 is connected to the first input terminal of relay RLY1, and the cathode of diode D2 is connected to the second input terminal of relay RLY1. The anode of diode D5 is connected to the first input terminal of relay RLY2, and the cathode of diode D5 is connected to the second input terminal of relay RLY2.
[0027] In this embodiment, both diodes D5 and D2 serve a protective function. When relay RLY1 is operating, switching transistor Q1 is turned on, and the VCC power supply forms a circuit through the second input terminal of RLY1, the coil, the first input terminal, and Q1. At this time, diode D2 is reverse-biased and cut off because its anode is connected to the first input terminal of RLY1 (low potential) and its cathode is connected to the second input terminal (high potential), thus not affecting the energization and engagement of RLY1. When Q1 is turned off, a reverse electromotive force (EMF) is generated at the moment the RLY1 coil is de-energized (resisting the sudden change in current). At this time, the anode of D2 is connected to the first input terminal of the coil (which becomes high potential due to the reverse EMF) and its cathode is connected to the second input terminal (low potential), forming a freewheeling circuit and releasing the reverse EMF to prevent high voltage from breaking down Q1. Similarly, when the switching transistor Q2 of relay RLY2 is turned off, diode D5 releases the reverse EMF of the RLY2 coil through freewheeling, protecting Q2. The addition of diodes ensures the safety of the switching transistor and coil during the relay switching process, improves the stability and lifespan of the switching control module, and ensures the reliable execution of main and backup power switching.
[0028] In one embodiment of this disclosure, the power loss monitoring module includes: resistor R1, resistor R10, and current sensor L1; The first terminal of current sensor L1 is connected to the second terminals of relays RLY1 and RLY2 respectively, and the second terminal of current sensor L1 outputs the power supply voltage. The first output terminal of the current sensor L1 is connected to the first terminal of the resistor R1 through the resistor R10. The second terminal of the resistor R1 is connected to the second output terminal of the current sensor L1. The second output terminal of the current sensor L1 is grounded. The first terminal of the resistor R1 is connected to the main control module.
[0029] In this embodiment, during normal power supply (main power output via RLY1 or backup power output via RLY2), the power supply current flows from the second terminal of the relay into the first terminal of the current sensor L1, and then through the second terminal of L1 to the output terminal. L1 senses the current flowing through it in real time, generates an electrical signal corresponding to the magnitude of the current, and outputs it through its first and second output terminals. At this time, the signal at the first output terminal of L1 is transmitted to the first terminal of resistor R1 via resistor R10, and the second terminal of R1 is grounded. R1 and R10 form a voltage divider circuit, adjusting the electrical signal output by L1 to a voltage signal that conforms to the recognition range of the main control module. The main control module determines that there is a current flowing normally through L1 by collecting the voltage signal at the first terminal of R1, i.e., the power supply is not lost. If the main power supply or backup power supply fails, the corresponding relay is disconnected, no current flows through L1, there is no electrical signal at the output terminal of L1, and the voltage signal at the first terminal of R1 disappears. The main control module recognizes the power supply failure based on this, and then triggers subsequent switching or alarm operations to achieve accurate monitoring of the power supply status.
[0030] 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 fast and seamless switching output control device for two main and backup AC power supplies with the same phase sequence, characterized in that, include: The system comprises a first auxiliary power supply, a second auxiliary power supply, a switching control module, a main control module, and a power failure monitoring module. The first terminal of the switching control module is used to connect to the main power supply, the second terminal of the switching control module is used to connect to the backup power supply, the third terminal of the switching control module is used to output the power supply voltage, and the control terminal of the switching control module is connected to the main control module. The first end of the power failure monitoring module is connected to the main power supply, the second end of the power failure monitoring module is connected to the backup power supply, and the output end of the power failure monitoring module is connected to the main control module; The first terminal of the first auxiliary power supply is connected to the main control module, the second terminal of the first auxiliary power supply is connected to the main power supply, the first terminal of the second auxiliary power supply is connected to the main control module, and the second terminal of the second auxiliary power supply is connected to the backup power supply.
2. The fast and seamless switching output control device for main and backup two-channel in-phase sequence AC power as described in claim 1, characterized in that, Also includes: buzzer; The buzzer is connected to the main control module.
3. The fast and seamless switching output control device for main and backup two-channel in-phase sequence AC power as described in claim 1, characterized in that, The switching control module includes: a switch Q1, a relay RLY1, a switch Q2, and a relay RLY2; The control terminal of the switching transistor Q1 is connected to the main control module. The first terminal of the switching transistor Q1 is connected to the first input terminal of the relay RLY1. The second input terminal of the relay RLY1 is connected to the VCC power supply. The second terminal of the switching transistor Q1 is grounded. The first terminal of the relay RLY1 is connected to the live wire of the main power supply. The second terminal of the relay RLY1 is used to output the power supply voltage. The control terminal of the switching transistor Q2 is connected to the main control module. The first terminal of the switching transistor Q2 is connected to the first input terminal of the relay RLY2. The second input terminal of the relay RLY2 is connected to the VCC power supply. The second terminal of the switching transistor Q2 is grounded. The first terminal of the relay RLY2 is connected to the live wire of the backup power supply. The second terminal of the relay RLY2 is used to output the power supply voltage.
4. The fast and seamless switching output control device for main and backup two-channel in-phase sequence AC power as described in claim 3, characterized in that, The switching control module further includes: a silicon controlled rectifier (SCR1) and a silicon controlled rectifier (SCR2); The control terminals of both the SCR1 and the SCR2 are connected to the main control module. The first anode of the SCR1 is connected to the live wire of the main power supply, and the second anode of the SCR1 is used to output the power supply voltage. The first anode of the SCR2 is connected to the live wire of the backup power supply, and the second anode of the SCR2 is used to output the power supply voltage.
5. The fast and seamless switching output control device for main and backup two-channel in-phase sequence AC power as described in claim 4, characterized in that, The switching control module further includes: diode D5 and diode D2; The anode of diode D2 is connected to the first input terminal of relay RLY1, and the cathode of diode D2 is connected to the second input terminal of relay RLY1. The anode of diode D5 is connected to the first input terminal of relay RLY2, and the cathode of diode D5 is connected to the second input terminal of relay RLY2.
6. The fast and seamless switching output control device for main and backup two-channel in-phase sequence AC power as described in claim 3, characterized in that, The power failure monitoring module includes: resistor R1, resistor R10, and current sensor L1; The first terminal of the current sensor L1 is connected to the second terminals of the relays RLY1 and RLY2 respectively, and the second terminal of the current sensor L1 outputs the power supply voltage. The first output terminal of the current sensor L1 is connected to the first terminal of the resistor R1 through the resistor R10, the second terminal of the resistor R1 is connected to the second output terminal of the current sensor L1, the second output terminal of the current sensor L1 is grounded, and the first terminal of the resistor R1 is connected to the main control module.