Intelligent power supply switching control circuit

By using normally closed and normally open connections of AC contactors KM1 and KM2 in the power switching circuit, combined with fuses and remote control signal receivers, the problem of manual operation of existing power switching is solved, and intelligent power switching with automatic and remote control is realized, suitable for low-voltage systems.

CN223156756UActive Publication Date: 2025-07-25JIANGXI TELLHOW INTELLIGENT POWER TECH CO LTD
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Patent Information

Application Number
CN202421685270.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-15
Publication Date
2025-07-25
Estimated Expiration
2034-07-15

AI Technical Summary

Technical Problem

The existing power switching loop requires manual operation and cannot achieve remote control, making the operation troublesome and inflexible.

Method used

The normally closed and normally open ends of the AC contactors KM1 and KM2 are connected to the live wire and neutral wire respectively, and are connected to the gear position and control loop of the conversion switch SA. Combined with the fuse and the remote control signal receiver, automatic and remote control power switching is realized.

Benefits of technology

It realizes safe and intelligent power switching, supports self-input and self-repair function, can be automatically or remotely controlled, and is suitable for low-voltage contact cabinets and dual power conversion circuits, improving operation flexibility and safety.

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Abstract

According to the intelligent power supply switching control circuit, one end of a normally-closed end KM2 is connected with a first live wire 1L1, the other end of the normally-closed end KM2 is connected with one end of an alternating current contactor KM1, and the other end of the alternating current contactor KM1 is connected with a first zero wire 1N; one end of the normally closed end KM1 is connected with a second live wire 2L1, the other end of the normally closed end KM1 is connected with one end of the alternating current contactor KM2, and the other end of the alternating current contactor KM2 is connected with a second zero wire 2N; the first live wire 1L1 and the second live wire 2L1 are respectively connected with one end of the normally-open end KM2 and one end of the normally-open end KM1, the other end of the normally-open end KM2 and the other end of the normally-open end KM1 are connected together and are respectively connected with two gears of the change-over switch SA, and the output end of the change-over switch SA is used for being connected with the input end of a control loop; the first null line 1N and the second null line 2N are respectively connected with one end of a normally open end KM1 and one end of a normally open end KM2, and the other end of the normally open end KM1 and the other end of the normally open end KM2 are connected together and are connected to the output end of the control loop.
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Description

Technical Field

[0001] The utility model relates to the field of power supply control of distribution boxes, in particular to an intelligent power supply switching control circuit. Background Technique

[0002] In the existing power supply switching circuit, the first-way power supply and the second-way power supply are respectively connected to two on-points of a change-over switch. When the first-way power supply loses power, it is necessary to manually operate the change-over switch to the second-way power supply, which is troublesome to operate and cannot realize the function of remote operation. Content of the Utility Model

[0003] To solve the above problems, the present technical solution provides an intelligent power supply switching control circuit.

[0004] To achieve the above object, the present technical solution is as follows:

[0005] An intelligent power supply switching control circuit includes an AC contactor KM1 and an AC contactor KM2. The AC contactor KM1 is provided with a normally closed end KM1 and a normally open end KM1. The AC contactor KM2 is provided with a normally closed end KM2 and a normally open end KM2, wherein;

[0006] One end of the normally closed end KM2 is connected to the first live wire 1L1, and the other end is connected to one end of the AC contactor KM1. The other end of the AC contactor KM1 is connected to the first neutral wire 1N;

[0007] One end of the normally closed end KM1 is connected to the second live wire 2L1, and the other end is connected to one end of the AC contactor KM2. The other end of the AC contactor KM2 is connected to the second neutral wire 2N;

[0008] The first live wire 1L1 and the second live wire 2L1 are respectively connected to one end of the normally open end KM2 and the normally open end KM1. The other ends of the normally open end KM2 and the normally open end KM1 are commonly connected and are respectively connected to two gears of a change-over switch SA. The output end of the change-over switch SA is used to be connected to the input end of a control circuit;

[0009] The first neutral wire 1N and the second neutral wire 2N are respectively connected to one end of the normally open end KM1 and the normally open end KM2. The other ends of the normally open end KM1 and the normally open end KM2 are commonly connected and are connected to the output end of the control circuit.

[0010] In some embodiments, the first live wire 1L1 and the second live wire 2L1 are respectively connected with a fuse 1FU and a fuse 2FU.

[0011] In some embodiments, a receiver for receiving a remote control signal is further provided between the output end of the change-over switch SA and the input end of the control circuit.

[0012] In some embodiments, the two gears of the transfer switch SA are a manual gear and an automatic gear respectively.

[0013] The beneficial effects of this application are as follows:

[0014] This application provides a safe, intelligent, self-switching and self-restoring loop that can achieve remote control, aiming to solve the problem that the current power supply switching control loop needs to be switched manually. This circuit can not only be applied in a low-voltage tie cabinet to realize the switching between the first power supply and the second power supply, but also be used in a dual-power conversion loop to realize the self-switching and self-restoring function. With the transfer switch, it can also achieve manual and remote control, and can be widely applied in the low-voltage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below.

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] Please refer to Figure 1 As shown, an intelligent power supply switching control circuit includes a contactor KM1 and a contactor KM2. The contactor KM1 is provided with a normally closed end KM1 and a normally open end KM1. The contactor KM2 is provided with a normally closed end KM2 and a normally open end KM2, wherein;

[0019] One end of the normally closed end KM2 is connected to the first live wire 1L1, and the other end is connected to one end of the contactor KM1. The other end of the contactor KM1 is connected to the first neutral wire 1N;

[0020] One end of the normally closed end KM1 is connected to the second live wire 2L1, and the other end is connected to one end of the contactor KM2. The other end of the contactor KM2 is connected to the second neutral wire 2N;

[0021] The first live wire 1L1 and the second live wire 2L1 are respectively connected to one end of the normally open end KM2 and the normally open end KM1. The other ends of the normally open end KM2 and the normally open end KM1 are commonly connected and respectively connected to the two gears of the transfer switch SA. The output end of the transfer switch SA is used to be connected to the input end of the control loop;

[0022] The first neutral line 1N and the second neutral line 2N are respectively connected to one end of the normally open contacts KM1 and KM2. The other ends of the normally open contacts KM1 and KM2 are commonly connected and are connected to the output end of the control circuit.

[0023] Specifically, the first live wire 1L1 and the second live wire 2L1 are respectively connected with fuses 1FU and 2FU.

[0024] Specifically, a receiver for receiving remote control signals is further provided between the output end of the changeover switch SA and the input end of the control circuit.

[0025] Specifically, the two gears of the changeover switch SA are respectively a manual gear and an automatic gear.

[0026] When the first power supply is energized, the coil of KM1 is energized and attracted, the normally open contact of KM1 is converted into a normally closed contact, and the control circuit is energized; when the second power supply is energized, the coil of KM2 is energized and attracted, the normally open contact of KM2 is converted into a normally closed contact, and the control circuit is energized. Only when one of the power supplies loses power can the other power supply close the coil and the control circuit is energized, avoiding the situation of parallel operation. If a changeover switch is connected to the control circuit, when the changeover switch is turned to the manual state, local control can be achieved, and when it is turned to the automatic state, remote control of the circuit can be realized.

[0027] The above are only the preferred embodiments of the present application, and are not used to limit the scope of implementation of the present application. All other principles and basic structures that are the same as or similar to those of the present application are within the protection scope of the present application.

Claims

1. An intelligent power switching control circuit, characterized in that It includes AC contactor KM1 and AC contactor KM2. The AC contactor KM1 is provided with a normally-closed terminal KM1 and a normally-open terminal KM1. The AC contactor KM2 is provided with a normally-closed terminal KM2 and a normally-open terminal KM2, where; One end of the normally-closed terminal KM2 is connected to the first live wire 1L1, and the other end is connected to one end of the AC contactor KM1. The other end of the AC contactor KM1 is connected to the first neutral wire 1N; One end of the normally-closed terminal KM1 is connected to the second live wire 2L1, and the other end is connected to one end of the AC contactor KM2. The other end of the AC contactor KM2 is connected to the second neutral wire 2N; The first live wire 1L1 and the second live wire 2L1 are respectively connected to one end of the normally-open terminal KM2 and the normally-open terminal KM1. The other ends of the normally-open terminal KM2 and the normally-open terminal KM1 are commonly connected and respectively connected to two gears of the change-over switch SA. The output end of the change-over switch SA is used to be connected to the input end of the control circuit; The first neutral wire 1N and the second neutral wire 2N are respectively connected to one end of the normally-open terminal KM1 and the normally-open terminal KM2. The other ends of the normally-open terminal KM1 and the normally-open terminal KM2 are commonly connected and are connected to the output end of the control circuit.

2. The intelligent power supply switching control circuit according to claim 1, characterized in that: The first live wire 1L1 and the second live wire 2L1 are respectively connected with a fuse 1FU and a fuse 2FU.

3. The intelligent power supply switching control circuit according to claim 2, wherein: A receiver for receiving remote control signals is also provided between the output end of the change-over switch SA and the input end of the control circuit.

4. An intelligent power switching control circuit according to claim 1, characterized in that: The two gears of the change-over switch SA are respectively a manual gear and an automatic gear.