A novel automatic transfer control system for excitation dual power supply circuit

Abstract

The application relates to the technical field of control of an excitation dual-power automatic transfer switch, and discloses a novel excitation dual-power circuit automatic transfer control system, which comprises a system module assembly, the system module assembly comprises an intermediate relay module and a switch module, the intermediate relay module comprises KA1, KA2, KA3, KA4 and KA5, the switch module comprises a one-way travel switch, a two-way travel switch, a guide travel switch and a brake travel switch, the one-way travel switch is COM1NC1, the two-way travel switch is COM2NC2, the guide travel switch is COM3NC3, the brake travel switch is COM4NO4 and COM4NC4, and the system module assembly comprises an input module, a coil module and an electrical lock SB. The intermediate relay is adopted to control the logic relation of the circuit, the control mode is simple, the failure rate is low, and the production cost is saved.

Description

Technical Field

[0001] This invention relates to the field of automatic transfer switch control technology for dual excitation power supplies, and in particular to a novel automatic transfer control system for dual excitation power supply circuits. Background Technology

[0002] The excitation-type dual-power automatic transfer switch is equipped with a controller and a control mechanism with electromechanical interlock. It is an electromagnetically driven switch, driven by a set of high-performance electromagnetic coils. It is an actuator with fast switching speed, perfect performance, safety and reliability, high degree of automation and wide range of applications. In a dual-power supply system with a main power supply and a backup power supply, it automatically switches between power supplies in case of failure of one power supply, undervoltage, overvoltage, phase loss, frequency deviation and other factors, so as to ensure the reliability and safety of power supply.

[0003] Currently, all three-position excitation type dual power supply switch control boards on the market use single-chip microcomputer electronic control technology to realize the product's switching function when controlling the automatic switching of its main body. However, the existing single-chip microcomputer electronic control technology uses a lot of electronic components, which results in high cost and high failure rate. Therefore, it is very necessary to propose a new type of excitation dual power supply circuit automatic switching control system. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a novel automatic switching control system for dual-power excitation circuits, which solves the problems of existing single-chip microcomputer electronic control technologies having a large number of electronic components, high cost, high failure rate, and inability to meet people's requirements.

[0005] (II) Technical Solution To achieve the above objectives, the present invention adopts the following technical solution: A novel automatic switching control system for dual-power excitation circuits includes a system module assembly. The system module assembly includes an intermediate relay module and a switch module. The intermediate relay module includes KA1, KA2, KA3, KA4, and KA5. The switch module includes a single-path limit switch, a double-path limit switch, a guide limit switch, and a tripping limit switch. The single-path limit switch is COM1 NC1, the double-path limit switch is COM2 NC2, the guide limit switch is COM3 NO3, and the tripping limit switches are COM4 NO4 and COM4 NC4. The system module assembly includes an input module, a coil module, and an electric lock SB. The input module includes input terminals, a single-path power input module, and a double-path power input module. The coil module includes tripping coils E1 and E2, two guide coils H1 and H2, and closing coils C1 and C2. The input terminals are 202, 203, 204, 205, and 206. The single-path power input module has two AC 220V power inputs: L1 and N1, and the double-path power input module has two AC 220V power inputs. The system module assembly includes multiple points, including L2 and N2, such as <1 and 9>, <2 and 10>, <3 and 11>, <4 and 12>, <5 and 9>, <6 and 10>, <7 and 11>, and <8 and 12>. L1 and N1 are connected to intermediate relays KA101 and KA401, and L2 and N2 are electrically connected to KA107. L2 is connected via KA104 to intermediate relays KA105, KA202, and KA502, input terminal 205, and a two-way limit switch COM2. NC2 is connected to intermediate relays KA106, KA203, KA503, and limit switch COM1NC1. Both limit switches COM1NC1 and COM2NC2 are connected to intermediate relay KA301. Intermediate relay KA107 connected to N2 has terminals <4 and 12>, intermediate relay KA104 connected to L2 has terminals <1 and 9>, intermediate relay KA102 connected to N1 has terminals <5 and 9>, and intermediate relay KA103 connected to L1 has terminals <8 and 12>. N1 and N2 are each connected to an electric lock SB via intermediate relay KA102. Intermediate relay KA201 connects L1 and L2 to N1 and N2, and intermediate relay KA201 is connected to input terminals 202 and 206. Intermediate relay KA301 is connected in parallel with intermediate relay KA303 and trip limit switch COM4. NO4 and trip limit switch COM4NC4 are connected, and intermediate relay KA303 is connected to intermediate relay KA302 via input terminal 204. Trip limit switch COM4 NO4 is connected to trip coils E1 and E2. One end of trip limit switch COM4 NC4 is connected to intermediate relay KA304.Intermediate relay KA304 is connected to intermediate relays KA504 and KA505 via intermediate relay KA204. Intermediate relays KA402 and KA403 are connected via intermediate relay KA205. Intermediate relays KA505 and KA402 are connected to two guide coils H1 and H2. KA403 is individually connected to closing coils C1 and C2. Intermediate relay KA501 is connected to KA203 and KA503 via input terminal 203.

[0006] The beneficial effects of this invention are as follows: 1. In this invention, the novel three-position excitation dual-power circuit automatic conversion control system uses intermediate relays to control the logic relationship of the circuit, which is simple to control, has a low failure rate, and saves production costs.

[0007] 2. In this invention, the first power supply and the second power supply serve as backups for each other, ensuring operation regardless of whether the faulty power supply is restored, thus ensuring good safety. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the circuit structure of a novel automatic switching control system for dual excitation power supply circuits proposed in this invention. Detailed Implementation

[0009] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. It should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection", and "setting" should be interpreted broadly. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0010] Reference Figure 1 A novel automatic switching control system for dual-power excitation circuits includes the following three operating states: I. Automatic Mode: One power supply fails, and two power supplies are powered. At this time, 202 and 206 are connected, and SB is closed. L1 and N1 are de-energized, and L2 and N2 are energized. N2 passes through the normally closed contact of KA1, the electric lock SB, and one end of KA2 and KA5 is connected to the neutral wire, finally reaching the AC terminals of the three rectifier bridges. One end of each of the three coils is connected to the neutral wire. L2 passes through the normally closed contact of KA1, and the KA2 coil is energized. L2 passes through the normally closed contact of the normally open transformer of KA2, the normally closed contact of KA5, the normally closed contact of the two-way limit switch, the normally closed contact of KA3, the normally closed contact of the zero-position limit switch, the normally closed contact of KA3, the normally closed contact of the normally open transformer of KA2, and the normally closed contact of KA4, reaching the AC terminals of the rectifier bridges. The two-way guide coil is energized, and the guide limit switch is closed. L2 continues to pass through the normally closed contact of the normally open transformer, finally reaching the AC terminals of the rectifier bridges. The closing coil is energized, and the two power supplies of the switch are closed. After closing, the two-way limit switch is opened, the zero-position limit switch is opened and closed, and the coil is de-energized.

[0011] II. Automatic Mode: One power supply is energized, and two power supplies are energized; at this time, 202 and 206 are connected, and SB is closed; L1 and N1 are energized, and L2 and N2 are energized; KA1 and KA4 coils are energized; N1 passes through the normally open and normally closed contact of KA1 transformer, the electric lock SB, and one end of KA2 and KA5 is connected to the neutral wire, finally reaching the AC terminals of the three rectifier bridges, with one end of each of the three coils connected to the neutral wire; L1 passes through the normally open and normally closed contact of KA1 transformer, and the KA2 coil is energized; L1 passes through the normally open and normally closed contact of KA1 transformer, the normally open and normally closed contact of KA2 transformer, and the KA5 coil is energized. L1 passes through the normally open and normally closed contact of KA5, the normally closed contact of one limit switch, the normally closed contact of KA3, the normally open and normally closed contact of the zero-position limit switch, and finally reaches the AC terminal of the rectifier bridge. The trip coil is energized, and the switch trips to the zero position. The zero-position limit switch closes and opens, and the trip coil is de-energized. L1 passes through the closed contact of the zero-position limit switch, the normally closed contact of KA3, the normally open and normally closed contact of KA2, and the normally open and normally closed contact of KA4, and finally reaches the AC terminal of the rectifier bridge. The closing coil is energized, and one power supply of the switch closes. After closing, one limit switch opens, the zero-position limit switch opens and closes, and the coil is de-energized.

[0012] III. Remote Control Mode: One power supply is energized, two power supplies are energized, or any one power supply is energized; at this time, 202 and 206 are disconnected, 202 and 203 are connected, and SB is closed; L1 and N1 are energized, L2 and N2 are energized; KA1 and KA4 coils are energized; N1 passes through the normally open and normally closed contact of KA1 transformer, the electric lock SB, and one end of KA5 and KA3 is connected to the neutral line, finally reaching the AC terminals of the three rectifier bridges, and one end of each of the three coils is connected to the neutral line; L1 passes through the normally open and normally closed contact of KA1 transformer, the connection terminal point, and KA5 coil is energized; L1 passes through the normally open and normally closed contact of KA5 transformer, one limit switch normally closed contact, KA3 normally closed contact, zero-position limit switch normally closed contact, KA3 normally closed contact, KA2 normally closed contact, KA5 normally open transformer normally closed contact, finally reaching the AC terminals of the rectifier bridges, and the closing coil is energized, and one power supply of the switch is closed; after closing, one limit switch is opened, the zero-position limit switch is opened and closed, and the coil is de-energized. 202 and 203 are disconnected, 202 and 205 are disconnected, and 202 and 204 are closed; L1 passes through the normally open and normally closed point of KA1 transformer and connects to the terminal point, energizing the KA3 coil and closing KA3; L1 passes through the normally open and normally closed point of KA3 transformer, the normally open and normally closed point of the zero-position travel switch, to the AC terminal of the rectifier bridge, energizing the trip coil, and the switch is tripped to the zero position; the zero-position travel switch is closed and opened, and the trip coil is de-energized. 202 and 203 are disconnected, 202 and 204 are disconnected, and 202 and 205 are closed. L1 passes through the normally open and normally closed contact of KA1, the connection terminal, the normally closed contact of KA5, the normally closed contact of the two-way limit switch, the normally closed contact of KA3, the normally closed contact of the zero-position limit switch, the normally closed contact of KA3, the normally closed contact of KA2, the normally closed contact of KA5, and then to the AC terminal of the rectifier bridge. The two-way guide coil is energized, and the guide limit switch is closed. L1 then passes through the closed contact of the guide limit switch and finally reaches the AC terminal of the rectifier bridge. The closing coil is energized, and one power supply of the switch is closed. After closing, one limit switch is opened, the zero-position limit switch is opened and closed, and the coil is de-energized.

[0013] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel automatic switching control system for dual-power excitation circuits, comprising a system module assembly, characterized in that, The system module assembly includes an intermediate relay module and a switch module. The switch module includes one limit switch, two limit switches, a guide limit switch, and a trip limit switch. The one limit switch is COM1 NC1, the two limit switches are COM2 NC2, the guide limit switch is COM3 NO3, and the trip limit switches are COM4 NO4 and COM4 NC4. The system module assembly also includes an input module, a coil module, and an electric lock SB. The input module includes input terminals, one power input module, and two power input modules. The coil module includes trip coils E1 and E2, two guide coils H1 and H2, and closing coils C1 and C2. The input terminals are 202, 203, 204, 205, and 206. The one power input module has one AC 220V power input L1 and N1, and the two power input modules have two AC 220V power inputs L2 and N2. The system module assembly includes multiple points, including <1 and 9>, <2... The following are connections: <10>, <3 and 11>, <4 and 12>, <5 and 9>, <6 and 10>, <7 and 11>, <8 and 12>. L1 and N1 are connected to intermediate relays KA101 and KA401, and L2 and N2 are electrically connected to KA107. L2 is connected to intermediate relays KA105, KA202, and KA502, input terminal 205, and a two-way limit switch COM2 NC2 via KA104. It is also connected to intermediate relays KA106, KA203, and KA503, and a single-way limit switch COM1 NC1. Both the single-way limit switch COM1 NC1 and the two-way limit switch COM2 NC2 are connected to intermediate relay KA301. The intermediate relay KA107 connected to N2 has positions <4 and 12>, and the intermediate relay KA104 connected to L2... Points are <1 and 9>. Intermediate relay KA102 connected to N1 has points <5 and 9>, and intermediate relay KA103 connected to L1 has points <8 and 12>. N1 and N2 are each connected to an electric lock SB via intermediate relay KA102. Intermediate relay KA201 connects L1 and L2 to N1 and N2, and intermediate relay KA201 is connected to input terminals 202 and 206. Intermediate relay KA301 is connected in parallel with intermediate relay KA303, trip limit switch COM4 NO4, and trip limit switch COM4 NC4. Intermediate relay KA303 is connected to intermediate relay KA302 via input terminal 204. Trip limit switch COM4 NO4 is connected to trip coils E1 and E2.One end of the trip limit switch COM4 NC4 is connected to an intermediate relay KA304. Intermediate relay KA304 is connected to intermediate relays KA504 and KA505 via intermediate relay KA204. Intermediate relays KA402 and KA403 are connected via intermediate relay KA205. Intermediate relays KA505 and KA402 are connected to two guide coils H1 and H2. KA403 is individually connected to closing coils C1 and C2. Intermediate relay KA501 is connected to KA203 and KA503 via input terminal 203.

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