UN-sts AC dual power automatic switching device

Abstract

This utility model discloses a UN-STS AC dual-power automatic switching device, belonging to the field of power switching technology. The UN-STS AC dual-power automatic switching device includes a main power supply and a secondary power supply, and also includes a switching circuit module. The switching circuit module includes: a first current transformer, whose input terminal is electrically connected to the output terminal of the main power supply; a second current transformer, whose input terminal is electrically connected to the output terminal of the secondary power supply; and a switching module, whose input terminal is electrically connected to the output terminals of the first and second current transformers respectively. Through the cooperation of the first current transformer, the second current transformer, the switching module, the processing chip, and the intermediate relay, this utility model enables automatic switching to the secondary power supply with a switching time of ≤5ms in the event of a main power supply failure, ensuring continuous operation of the load equipment, reducing the risk of power outages, and further improving the reliability of AC dual-power automatic switching.

Description

Technical Field

[0001] This utility model relates to the field of power switching technology, and in particular to a UN-STS AC dual power automatic switching device. Background Technology

[0002] In scenarios such as data centers, medical facilities, and industrial control, power outages may lead to data loss, equipment damage, or even safety accidents. Traditional mechanical ATS (Automatic Transfer Switches) have problems such as long switching time (>100ms), low reliability, and high maintenance costs, and cannot meet the continuous power supply requirements of high-precision equipment. When the load equipment is working, the three-phase voltage of the two power supplies needs to be tested regularly. If any phase experiences overvoltage, undervoltage, or power failure, it will affect the continuous operation of the load equipment, increase the risk of power failure, and further reduce the reliability of automatic switching between AC dual power supplies.

[0003] Therefore, in order to address this problem, this utility model provides a UN-STS AC dual power supply automatic switching device. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a UN-STS AC dual power supply automatic switching device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An UN-STS AC dual-power automatic switching device includes a main power supply, a secondary power supply, and a switching circuit module. The switching circuit module includes a first current transformer, a second current transformer, and a switching module. The input terminal of the first current transformer is electrically connected to the output terminal of the main power supply; the input terminal of the second current transformer is electrically connected to the output terminal of the secondary power supply; the input terminal of the switching module is electrically connected to the output terminals of the first current transformer and the second current transformer, respectively; and the output terminal of the switching module is electrically connected to the load device. The switching module is used to switch the two AC power inputs into a single main power output and supply power to the load device.

[0006] Preferably, the switching module includes a processing chip and an intermediate relay. The processing chip is electrically connected to the input terminals of the first current transformer and the second current transformer. The output terminal of the processing chip is electrically connected to the input terminal of the intermediate relay. The output terminal of the intermediate relay is electrically connected to the load device.

[0007] Preferably, the processing chip has ten sets of pins on its sidewalls, namely, pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, and pin 10. Pin 1 and pin 5 are connected in parallel, pin 2 and pin 6 are connected in parallel, pin 3 and pin 7 are connected in parallel, and pin 4 and pin 8 are connected in parallel. Pin 1 and pin 2 are electrically connected to the input terminal of the first current transformer, pin 3 and pin 4 are electrically connected to the input terminal of the second current transformer, and pins 5, 6, 7, and 8 are all electrically connected to the input terminal of the intermediate relay. The output terminal of the intermediate relay is electrically connected to the load device.

[0008] Preferably, the intermediate relay includes eight sets of pins, namely pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, pin 17, and pin 18. Pin 11 and pin 15 are connected in parallel, pin 12 and pin 16 are connected in parallel, the output terminals of pin 15 and pin 16 are electrically connected to the input terminal of the load device, pin 13 and pin 7 are connected in parallel, pin 14 and pin 8 are connected in parallel, pin 17 and pin 18 are connected in parallel with pin 9 and pin 10, respectively, and a coil control terminal is provided between pin 17 and pin 18.

[0009] Preferably, the processing chip is an HC32F003C4PA type chip.

[0010] Preferably, the intermediate relay is an HF115FA-2Z type relay.

[0011] Compared with the prior art, this utility model provides a UN-STS AC dual power automatic switching device, which has the following advantages: The UN-STS AC dual power automatic switching device, through the cooperation of the first current transformer, the second current transformer, the switching module, the processing chip and the intermediate relay, enables it to automatically switch to the secondary power supply in the event of a main power supply failure in a static dual power supply switching mode with a switching time of ≤5ms. This ensures the continuous operation of the load equipment, reduces the risk of power outages in the load equipment, and further improves the reliability of AC dual power automatic switching. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a UN-STS AC dual power supply automatic switching device proposed in this utility model; Figure 2 This utility model provides an overall circuit diagram of a UN-STS AC dual power supply automatic switching device. Figure 3 The circuit diagram of the processing chip for the UN-STS AC dual power supply automatic switching device proposed in this utility model.

[0013] In the diagram: 1. Main power supply; 2. Secondary power supply; 3. First current transformer; 4. Second current transformer; 5. Switching module; 51. Processing chip; 52. Intermediate relay; 6. Load device. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0016] Reference Figures 1-3An UN-STS AC dual-power automatic switching device includes a main power supply 1 and a secondary power supply 2, and a switching circuit module. The switching circuit module includes: a first current transformer 3, whose input terminal is electrically connected to the output terminal of the main power supply 1; a second current transformer 4, whose input terminal is electrically connected to the output terminal of the secondary power supply 2; and a switching module 5, whose input terminals are electrically connected to the output terminals of the first current transformer 3 and the second current transformer 4 respectively, and whose output terminal is electrically connected to the load device 6. The switching module 5 is used to switch the two AC power inputs into a single main power output and supply power to the load device 6. The switching module 5 includes a processing core. The processing chip 51 and intermediate relay 52 are connected. The input terminals of the processing chip 51 are electrically connected to the first current transformer 3 and the second current transformer 4. The output terminal of the processing chip 51 is electrically connected to the input terminal of the intermediate relay 52. ​​The output terminal of the intermediate relay 52 is electrically connected to the load device 6. The side wall of the processing chip 51 is provided with ten sets of pins, which are, in order, the first pin, the second pin, the third pin, the fourth pin, the fifth pin, the sixth pin, the seventh pin, the eighth pin, the ninth pin, and the tenth pin. The first pin and the fifth pin are connected in parallel, the second pin and the sixth pin are connected in parallel, and the third pin is connected in parallel. Pin 1 and pin 7 are connected in parallel, pin 4 and pin 8 are connected in parallel, pin 1 and pin 2 are electrically connected to the input terminal of the first current transformer 3, pin 3 and pin 4 are electrically connected to the input terminal of the second current transformer 4, pin 5, pin 6, pin 7, and pin 8 are all electrically connected to the input terminal of the intermediate relay 52, and the output terminal of the intermediate relay 52 is electrically connected to the load device 6. The intermediate relay 52 includes eight sets of pins, namely pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, and pin 17. The eighteenth pin is provided, wherein the eleventh and fifteenth pins are connected in parallel, the twelfth and sixteenth pins are connected in parallel, the output terminals of the fifteenth and sixteenth pins are electrically connected to the input terminal of the load device 6, the thirteenth pin is connected in parallel with the seventh pin, the fourteenth pin is connected in parallel with the eighth pin, the seventeenth and eighteenth pins are connected in parallel with the ninth and tenth pins respectively, and a coil control terminal is provided between the seventeenth and eighteenth pins. The processing chip 51 is preferably an HC32F003C4PA type chip, and the intermediate relay 52 is preferably an HF115FA-2Z type relay.

[0017] In this utility model, the main power supply 1 supplies power: the main power supply 1 supplies power to the switching module 5 through the first current transformer 3. The first current transformer 3 detects the voltage signal of the main power supply 1 and transmits it to the processing chip 51. The processing chip 51 receives the data of the main power supply 1 through the first pin and the second pin. After judging that the voltage is normal, it sends a signal to the intermediate relay 52 to close the main power supply 1 through the fifth to the eighth pin. The fifteenth and sixteenth pins of the intermediate relay 52 are closed, and the load device (6) is powered by the main power supply 1. When the main power supply 1 fails, it switches to the secondary power supply 2. The first current transformer 3 detects an abnormal voltage in the main power supply 1 (such as overvoltage, undervoltage, or power failure) and sends a fault signal to the processing chip 51. The processing chip 51 determines that the main power supply 1 has failed through an algorithm and starts the switching program: the fifth to eighth pins output control signals to disconnect the main power supply 1 path of the intermediate relay 52 (the fifteenth and sixteenth pins are disconnected), and the ninth and tenth pins activate the secondary power supply 2 path of the intermediate relay 52 (the seventeenth and eighteenth pins are closed). The intermediate relay 52 switches to the secondary power supply 2, and the secondary power supply 2 supplies power to the switching module 5 through the second current transformer 4 and to the load device 6 through the pin (the seventeenth and eighteenth pins are closed). Automatic switching after main power supply 1 is restored: When main power supply 1 returns to normal, the first current transformer 3 detects qualified voltage again. After the processing chip 51 confirms that main power supply 1 is stable, it switches back to main power supply 1 first, disconnects the secondary power supply 2 path (pins 17 and 18 are disconnected), and recloses the main power supply 1 path (pins 15 and 16 are closed). The load device 6 seamlessly switches to main power supply 1.

[0018] Dual power supply fault protection: If both main power supply 1 and secondary power supply 2 are abnormal (such as simultaneous power failure or voltage failure), the processing chip 51 triggers the protection mechanism: simultaneously disconnecting the main power supply 1 and secondary power supply 2 paths of the intermediate relay 52, sending an alarm signal through the coil control terminal (between pins seventeen and eighteen) or entering standby mode.

[0019] The system awaits power restoration or manual intervention.

[0020] Manual intervention and monitoring (optional); the power path can be forcibly switched via the coil control terminal of the intermediate relay 52 (e.g., during testing or maintenance). The processing chip 51 connects to an external monitoring system via a reserved communication interface (e.g., pins 9 and 10) to transmit power status data in real time.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A UN-STS AC dual-power automatic switching device, comprising a main power supply (1) and a secondary power supply (2), characterized in that, The UN-STS AC dual power supply automatic switching device further includes a switching circuit module, which includes a first current transformer (3), a second current transformer (4), and a switching module (5). The input terminal of the first current transformer (3) is electrically connected to the output terminal of the main power supply (1); the input terminal of the second current transformer (4) is electrically connected to the output terminal of the secondary power supply (2); the input terminal of the switching module (5) is electrically connected to the output terminals of the first current transformer (3) and the second current transformer (4) respectively, and the output terminal of the switching module (5) is electrically connected to the load device (6). The switching module (5) is used to switch the two AC power inputs to one total power output and supply power to the load device (6).

2. The UN-STS AC dual power automatic switching device according to claim 1, characterized in that, The switching module (5) includes a processing chip (51) and an intermediate relay (52). The processing chip (51) is electrically connected to the input terminals of the first current transformer (3) and the second current transformer (4). The output terminal of the processing chip (51) is electrically connected to the input terminal of the intermediate relay (52). The output terminal of the intermediate relay (52) is electrically connected to the load device (6).

3. The UN-STS AC dual power automatic switching device according to claim 2, characterized in that, The processing chip (51) has ten sets of pins on its sidewalls. The ten sets of pins are, in order, the first pin, the second pin, the third pin, the fourth pin, the fifth pin, the sixth pin, the seventh pin, the eighth pin, the ninth pin, and the tenth pin. The first pin and the fifth pin are connected in parallel, the second pin and the sixth pin are connected in parallel, the third pin and the seventh pin are connected in parallel, and the fourth pin and the eighth pin are connected in parallel. The first pin and the second pin are electrically connected to the input terminal of the first current transformer (3), the third pin and the fourth pin are electrically connected to the input terminal of the second current transformer (4), and the fifth pin, the sixth pin, the seventh pin, and the eighth pin are all electrically connected to the input terminal of the intermediate relay (52).

4. The UN-STS AC dual power supply automatic switching device according to claim 3, characterized in that, The intermediate relay (52) includes eight sets of pins, namely the eleventh pin, the twelfth pin, the thirteenth pin, the fourteenth pin, the fifteenth pin, the sixteenth pin, the seventeenth pin, and the eighteenth pin. The eleventh pin and the fifteenth pin are connected in parallel, the twelfth pin and the sixteenth pin are connected in parallel, the output terminals of the fifteenth pin and the sixteenth pin are electrically connected to the input terminal of the load device (6), the thirteenth pin is connected in parallel with the seventh pin, the fourteenth pin is connected in parallel with the eighth pin, the seventeenth pin and the eighteenth pin are connected in parallel with the ninth pin and the tenth pin, respectively, and a coil control terminal is provided between the seventeenth pin and the eighteenth pin.

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