A distributed redundant power supply circuit and method inside RPDU

Abstract

The present invention relates to a RPDU internal distributed redundant power supply circuit, including a power supply board, a backplane, a CPU board and a plurality of power boards; the power supply board performs overvoltage protection and filtering on the multi-channel input electricity, and after corresponding voting processing, the voltage output by the power supply board passes through the backplane to provide redundant control electricity for the CPU board and each power board. The present invention also relates to a power supply method for the RPDU internal distributed redundant power supply circuit, including three power supply modes: aircraft maintenance mode recognition, RPDU internal redundant power supply, and RPDU internal distributed power supply. The present invention analyzes the power supply of the RPDU under different modes of the aircraft, adopts a redundant distributed power supply architecture, and designs a highly reliable, hotspot dispersed RPDU internal power supply architecture that can cooperate with the aircraft for pattern recognition, thereby improving the adaptability of the power supply architecture.

Description

Technical Field

[0001] The present invention relates to an aviation power distribution system, belonging to the field of power distribution systems and power supply of power distribution products, and specifically to a RPDU internal distributed redundant power supply circuit and method suitable for aircraft mode recognition. Background Art

[0002] Aircraft have multiple working scenarios, so there are multiple working modes. The different working modes of aircraft have little effect on the internal power supply mode of most aircraft power supply equipment. For RPDU, the aircraft maintenance mode affects the power input of gateway RPDU.

[0003] RPDU stands for Remote Power Distribution Unit, and the gateway RPDU needs to perform certain maintenance operations when the aircraft is in maintenance mode. The maintenance mode can be determined by changing the way the aircraft powers the RPDU, so a redundant power supply is required inside the gateway RPDU.

[0004] The commonly used RPDU internal power supply mode is mostly centralized, which converts the main redundant working power of the product from the power board. The redundant working power is transmitted to each board through the motherboard after the power board votes, and the power board centrally supplies power to other boards. In the centralized internal power supply architecture, the heat point is concentrated in the power conversion module, and the heat is serious. It is necessary to consider adding corresponding heat dissipation measures, which not only increases the weight of the product, but also affects the product reliability. Therefore, it is necessary to propose a distributed power supply architecture. Summary of the invention

[0005] The purpose of the present invention is to provide an internal distributed redundant power supply circuit suitable for aircraft mode recognition for RPDU in response to the above technical problems, so as to meet the requirements of aircraft working mode recognition, provide power supply strategies, and ensure power supply redundancy, and adopt distributed power supply, disperse hot spots, and no heat dissipation measures are required.

[0006] Technical solution of the present invention:

[0007] An RPDU internal distributed redundant power supply circuit is applicable to aircraft maintenance mode recognition, RPDU internal redundant power supply and RPDU internal distributed power supply;

[0008] It is characterized in that the distributed redundant power supply circuit inside the RPDU includes a power board, a backplane, a CPU board and multiple power boards; the power board performs overvoltage protection and filtering on multiple input powers, and after corresponding voting processing, the voltage output by the power board passes through the backplane to provide redundancy control power for the CPU board and each power board.

[0009] It is characterized in that the n independent power inputs of the power board are respectively connected to the overvoltage protection and filtering processing circuits of their respective channels. After being output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to realize three-way 28V voltage output, which is output to the CPU board and each power board through the backplane.

[0010] The invention is characterized in that the n independent power inputs of the power board are power input battery, power input 2, ..., power input n, where n≤5.

[0011] It is characterized in that the three input ports of the CPU board receive three 28V voltages input from the backplane, and after passing through a fuse overcurrent protection respectively, three discrete quantity signals are obtained, which are sent to the discrete quantity acquisition circuit respectively. At the same time, the three discrete quantity signals are respectively voted by a diode, connected together, and connected to DC / DC1 for power conversion. The working electricity output by DC / DC1 supplies power to the discrete quantity acquisition circuit, other functional circuits and DC / DC2 respectively, wherein the working electricity output by DC / DC2 is connected to the CPU circuit to supply power to the CPU circuit.

[0012] It is characterized in that the two input ports of each power board receive the last two 28V voltages input from the backplane, and are connected together after passing through a fuse overcurrent protection and a diode voting respectively, and then are respectively connected to the input ends of multiple SSPCs inside each power board, so that the power supply of each SSPC is exactly the same. After receiving the power input inside each SSPC, it passes through a fuse overcurrent protection and is connected to DC / DC3 for power conversion. The output end of DC / DC3 is connected to the drive circuit and DC / DC4, and the output end of DC / DC4 is connected to various functional circuits inside the SSPC.

[0013] The characteristic of the invention is that the power board only processes the redundant input voltage, does not perform voltage conversion, and outputs the voltage to other boards in the RPDU.

[0014] A power supply method for a distributed redundant power supply circuit inside an RPDU includes three power supply modes: aircraft maintenance mode recognition, internal redundant power supply of the RPDU, and internal distributed power supply of the RPDU.

[0015] 1) Aircraft maintenance mode identification: When the aircraft is in maintenance mode, it is powered only by the power input battery. After the overvoltage protection and filtering processing circuit, a 28V voltage output is realized, which is output to the CPU board through the backplane. One input port of the CPU board receives three 28V voltages input from the backplane. Two voltages are 0. After passing through a fuse overcurrent protection, three discrete quantity signals are obtained and sent to the discrete quantity acquisition circuit respectively. The aircraft maintenance mode identification is completed and the CPU board enters the maintenance mode;

[0016] 2) RPDU internal redundant power supply: n independent power supplies are input into the overvoltage protection and filtering processing circuits of each channel of the power board. After being output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to achieve three-way 28V voltage output, which is output to the CPU board and each power board through the backplane; the three-way input port of the CPU board receives the three-way 28V voltage input from the backplane to achieve triple redundant power supply; the two-way input port of each power board receives the last two 28V voltages input from the backplane to achieve dual redundant power supply;

[0017] 3) Distributed power supply inside RPDU: n independent power supplies are input into the overvoltage protection and filtering processing circuit of each channel of the power board. After being output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to achieve three-way 28V voltage output, which are output to the CPU board and each power board through the backplane; the three-way input port of the CPU board receives the three-way 28V voltage input from the backplane, and after being protected by a fuse overcurrent, three discrete quantity signals are obtained, which are sent to the discrete quantity acquisition circuit respectively. At the same time, the three discrete quantity signals are voted through a diode respectively, connected together, and connected to DC / DC1 for power conversion. The working power output by DC / DC1 is respectively supplied to the discrete quantity acquisition circuit and other power boards. The power circuit and DC / DC2 are powered, wherein the working circuit output by DC / DC2 is connected to the CPU circuit to supply power to the CPU circuit, thereby realizing the distributed power supply of the CPU board; the two input ports of each power board receive the last two 28V voltages input by the backplane, which are respectively connected together after passing through a fuse overcurrent protection and a diode voting, and then are respectively connected to the input ends of multiple SSPCs inside each power board, so that the power supply of each SSPC is exactly the same, and after receiving the power input inside each SSPC, it is connected to DC / DC3 for power conversion after passing through a fuse overcurrent protection, and the output end of DC / DC3 is connected to the drive circuit and DC / DC4, and DC / DC3 supplies power to the drive circuit and DC / DC4, thereby realizing the distributed power supply of each power board.

[0018] Beneficial effects of the invention:

[0019] The present invention clarifies the design of the RPDU internal distributed redundant power supply architecture based on aircraft pattern recognition. By analyzing the power supply conditions of the RPDU under different aircraft modes, a redundant distributed power supply architecture is adopted to design a highly reliable, hotspot-dispersed RPDU internal power supply architecture that can cooperate with the aircraft for pattern recognition, thereby improving the adaptability of the power supply architecture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A RPDU internal distributed redundant power supply circuit diagram of the present invention DETAILED DESCRIPTION

[0021] The connection structure of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0022] See also Figure 1 The redundant power supply circuit diagram in the central power board is to process the aircraft input power for power protection and filtering, and then input it to the motherboard after preliminary voting, adjust the power transmission path on the motherboard, and then output multiple power.

[0023] See also Figure 1 The power supply circuit diagram of the CPU board, that is, it takes power from the backplane, where the CPU takes excess 28V working power from the motherboard, and after voting by the diode, it is converted into the working power required by itself through DC / DC1; at the same time, the discrete quantity acquisition circuit collects the power supply input of the CPU board, and takes the power supply input as the logic "1" and the no power supply input as the logic "0", and provides the power supply logic input with the arrangement and combination of power supply logic for aircraft mode recognition and judgment.

[0024] See also Figure 1 The distributed power supply architecture diagram in the medium power board, that is, taking power from the backplane (redundancy), the input power is input to each SSPC (1-z) small module of the power board card after fuse protection and voting, among which the 28V power is independently converted into the power required by the SSPC small module as the working power of each SSPC small module.

[0025] Figure 1 The power supply architecture is a distributed redundant power supply architecture inside the RPDU, which can provide different power supply modes for different boards and complete multiple power supply strategies according to the power input to ensure that the power supply of each board meets the aircraft pattern recognition requirements and the board power supply redundancy requirements, thereby ensuring the reliable power supply of the RPDU product. The distributed redundant power supply circuit inside the RPDU includes a power board, a backplane, a CPU board and multiple power boards; the power board performs overvoltage protection and filtering on the multiple input electricity, and after the corresponding voting process, the voltage output by the power board passes through the backplane to provide redundancy control electricity for the CPU board and each power board.

[0026] The RPDU internal distributed redundant power supply circuit includes three power supply modes: aircraft maintenance mode recognition, RPDU internal redundant power supply, and RPDU internal distributed power supply:

[0027] 1) Aircraft maintenance mode identification: When the aircraft is in maintenance mode, it is powered only by the power input battery. After the overvoltage protection and filtering processing circuit, a 28V voltage output is realized, which is output to the CPU board through the backplane. One input port of the CPU board receives three 28V voltages input from the backplane. Two voltages are 0. After passing through a fuse overcurrent protection, three discrete quantity signals are obtained and sent to the discrete quantity acquisition circuit respectively. The aircraft maintenance mode identification is completed and the CPU board enters the maintenance mode;

[0028] 2) RPDU internal redundant power supply: n independent power supplies are input into the overvoltage protection and filtering processing circuits of each channel of the power board. After being output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to achieve three-way 28V voltage output, which is output to the CPU board and each power board through the backplane; the three-way input port of the CPU board receives the three-way 28V voltage input from the backplane to achieve triple redundant power supply; the two-way input port of each power board receives the last two 28V voltages input from the backplane to achieve dual redundant power supply;

[0029] 3) Distributed power supply inside RPDU: n independent power supplies are input into the overvoltage protection and filtering processing circuit of each channel of the power board. After being output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to achieve three-way 28V voltage output, which are output to the CPU board and each power board through the backplane; the three-way input port of the CPU board receives the three-way 28V voltage input from the backplane, and after being protected by a fuse overcurrent, three discrete quantity signals are obtained, which are sent to the discrete quantity acquisition circuit respectively. At the same time, the three discrete quantity signals are voted through a diode respectively, connected together, and connected to DC / DC1 for power conversion. The working power output by DC / DC1 is respectively supplied to the discrete quantity acquisition circuit and other power boards. The power circuit and DC / DC2 are powered, wherein the working circuit output by DC / DC2 is connected to the CPU circuit to supply power to the CPU circuit, thereby realizing the distributed power supply of the CPU board; the two input ports of each power board receive the last two 28V voltages input by the backplane, which are respectively connected together after passing through a fuse overcurrent protection and a diode voting, and then are respectively connected to the input ends of multiple SSPCs inside each power board, so that the power supply of each SSPC is exactly the same, and after receiving the power input inside each SSPC, it is connected to DC / DC3 for power conversion after passing through a fuse overcurrent protection, and the output end of DC / DC3 is connected to the drive circuit and DC / DC4, and DC / DC3 supplies power to the drive circuit and DC / DC4, thereby realizing the distributed power supply of each power board.

Claims

1. A RPDU internal distributed redundant power supply circuit, suitable for aircraft maintenance mode identification, RPDU internal redundant power supply and RPDU internal distributed power supply; It is characterized in that The RPDU internal distributed redundant power supply circuit includes a power board, a backplane, a CPU board and multiple power boards; the power board performs overvoltage protection and filtering on the multiple input electricity, and after corresponding voting processing, the voltage output by the power board passes through the backplane to provide redundancy control electricity for the CPU board and each power board; The n independent power inputs of the power board are connected to the overvoltage protection and filtering processing circuits of their respective channels. After being output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to achieve three-way 28V voltage output, which is output to the CPU board and each power board through the backplane; The three input ports of the CPU board receive three 28V voltages input from the backplane, and after passing through a fuse for overcurrent protection, three discrete quantity signals are obtained, which are sent to the discrete quantity acquisition circuit respectively. At the same time, the three discrete quantity signals are voted through a diode respectively, connected together, and connected to DC / DC1 for power conversion. The working power output by DC / DC1 supplies power to the discrete quantity acquisition circuit, other functional circuits and DC / DC2 respectively, and the working power output by DC / DC2 is connected to the CPU circuit to supply power to the CPU circuit; The two input ports of each power board receive the last two 28V voltages input from the backplane, and are connected together after passing through a fuse overcurrent protection and a diode voting, and then connected to the input ends of multiple SSPCs inside each power board, so that the power supply of each SSPC is exactly the same. After receiving the power input inside each SSPC, it passes through a fuse overcurrent protection and is connected to DC / DC3 for power conversion. The output end of DC / DC3 is connected to the drive circuit and DC / DC4, and the output end of DC / DC4 is connected to various functional circuits inside the SSPC.

2. The RPDU internal distributed redundant power supply circuit as claimed in claim 1, characterized in that: The n independent power inputs of the power board are power input battery, power input 2, ..., power input n, where n≤5.

3. The RPDU internal distributed redundant power supply circuit as claimed in claim 2, characterized in that: The power board only processes the excess input voltage without performing voltage conversion and outputs the voltage to other boards in the RPDU.

4. A power supply method for a distributed redundant power supply circuit inside an RPDU as described in any one of claims 1-3, comprising three power supply modes: aircraft maintenance mode recognition, internal redundant power supply of the RPDU, and internal distributed power supply of the RPDU.

5. The power supply method according to claim 4, characterized in that: When the aircraft is in maintenance mode, it is powered only by the power input battery. After overvoltage protection and filtering processing circuits, a 28V voltage output is achieved, which is output to the CPU board through the backplane. One input port of the CPU board receives three 28V voltages input from the backplane, and two voltages are 0. After passing through a fuse for overcurrent protection, three discrete quantity signals are obtained and sent to the discrete quantity acquisition circuit respectively. The aircraft maintenance mode is identified and the CPU board enters maintenance mode.

6. The power supply method according to claim 5, characterized in that: When the RPDU has redundant power supply, n independent power supplies are input into the overvoltage protection and filtering processing circuits of each channel of the power board. After the outputs are output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to achieve three-way 28V voltage output, which is output to the CPU board and each power board through the backplane; the three-way input ports of the CPU board receive the three-way 28V voltage input from the backplane to achieve triple redundant power supply; the two-way input ports of each power board receive the last two 28V voltages input from the backplane to achieve dual redundant power supply.

7. The power supply method according to claim 6, characterized in that: When the RPDU is internally powered by distributed power, n independent power supplies are input into the overvoltage protection and filtering processing circuits of each channel of the power board. After being output from their respective overvoltage protection and filtering processing circuits, they are voted through the diodes of their respective channels, and the output ends of channels 2-n are connected in parallel in pairs to achieve three-way 28V voltage output, which are output to the CPU board and each power board through the backplane; the three-way input port of the CPU board receives the three-way 28V voltage input from the backplane, and after being protected by a fuse overcurrent, three discrete quantity signals are obtained, which are sent to the discrete quantity acquisition circuit respectively. At the same time, the three discrete quantity signals are voted through a diode respectively, connected together, and connected to DC / DC1 for power conversion. The working power output by DC / DC1 is respectively supplied to the discrete quantity acquisition circuit and other power boards. The power circuit and DC / DC2 are powered, wherein the working circuit output by DC / DC2 is connected to the CPU circuit to supply power to the CPU circuit, thereby realizing the distributed power supply of the CPU board; the two input ports of each power board receive the last two 28V voltages input by the backplane, which are respectively connected together after passing through a fuse overcurrent protection and a diode voting, and then are respectively connected to the input ends of multiple SSPCs inside each power board, so that the power supply of each SSPC is exactly the same, and after receiving the power input inside each SSPC, it is connected to DC / DC3 for power conversion after passing through a fuse overcurrent protection, and the output end of DC / DC3 is connected to the drive circuit and DC / DC4, and DC / DC3 supplies power to the drive circuit and DC / DC4, thereby realizing the distributed power supply of each power board.

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