CN111293864A - Remote power distribution device architecture integrating multiple power conversion functions - Google Patents
Remote power distribution device architecture integrating multiple power conversion functions Download PDFInfo
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- CN111293864A CN111293864A CN201811496908.0A CN201811496908A CN111293864A CN 111293864 A CN111293864 A CN 111293864A CN 201811496908 A CN201811496908 A CN 201811496908A CN 111293864 A CN111293864 A CN 111293864A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
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Abstract
The invention discloses a remote power distribution device architecture integrating multiple power conversion functions, which comprises a power conversion module, a power conversion module and a power conversion module, wherein the power conversion module is used for receiving an input power supply 230VAC and an input power supply 28VDC from the outside and converting the input power supply 230VAC and the input power supply 28VDC into an output power supply 230VAC, an output power supply 115VAC, an output power supply +/-270VDC, an output power supply +/-135VDC and an output power supply 28 VDC; an SSPC 230VAC module; SSPC 115VAC module; SSPC +/-270VDC modules; SSPC +/-135VDC modules; an SSPC 28VDC module; and the COM communication module. The invention has the beneficial effects that: after a new power supply framework is adopted, the number of input power feeder lines of the RPDU is changed from a plurality of former leads to three, and meanwhile, due to the improvement of the voltage level of the feeder lines, the input current can be reduced, the wire diameter of the leads is reduced, and the weight of the airplane cable is reduced from two dimensions.
Description
Technical Field
The invention relates to a remote power distribution device architecture integrating multiple power conversion functions.
Background
The power supply system of the conventional airplane (including B787 and other multi-airplane airplanes) comprises four components of power generation, secondary power supply, primary power distribution and secondary power distribution. Where the generator is the primary power source of the aircraft, typically a 115VAC or 235VAC ac power source, the secondary power source converts it to 28VDC to the primary distribution bars, which are then subdivided by the primary distribution system to the secondary distribution devices, which supply the end loads.
Due to the introduction of a conversion device of a secondary power supply and a required primary power distribution intermediate link, the system architecture is complex, the reliability of a power supply system is reduced, and the weight and the cost of an airplane are increased.
Fig. 1 shows the RPDU architecture design of B787.
As can be seen from the figure, the RPDU contains 8 modules, namely two communication modules (COM 1 and COM 2) and 6 SSPCs (3 DC SSPCs and 3 AC SSPCs).
The communication module obtains 28VDC working power from outside to provide working power for itself and other SSPCs, and also provides communication interfaces of RPDU and other RPDU for RPDU communication network. The communication mode adopts AFDX and TTP.
The power input to the AC SSPC and the DC SSPC comes from the external 115VAC power feed and 28VDC power feed, providing power supply to the 115VAC and 28VDC loads, respectively.
From this architectural design, we can see that it has several drawbacks:
a. the product needs both working power supply input (28 VDC) and power feeder input (115 VAC, 28 VDC), the power input voltage is various, and the weight of the cable is increased;
b. the SSPC output voltage is too single, only 115VAC and 28VDC can be output, and the requirements of the multi-level electric aircraft on various voltage levels (+/-135 VDC, +/-270 VDC) in the future cannot be met;
c. the communication bus adopts TTP, is expensive, and can adopt other mature low-cost communication buses.
Disclosure of Invention
The invention aims to solve the technical problem that the weight of an airplane cable is large, and provides a novel remote power distribution device framework integrating various power conversion functions.
In order to achieve the purpose, the technical scheme of the invention is as follows: a remote power distribution device architecture integrating multiple power conversion functions includes,
a power conversion module for receiving an input power 230VAC and an input power 28VDC from the outside and converting them into an output power 230VAC, an output power 115VAC, an output power +/-270VDC, an output power +/-135VDC and an output power 28VDC according to the input power 230VAC and the input power 28 VDC;
an SSPC 230VAC module for receiving an output power 230VAC and an output power 28VDC from the power conversion module;
an SSPC 115VAC module for receiving an output power 115VAC and an output power 28VDC from the power conversion module;
an SSPC +/-270VDC module for receiving output power +/-270VDC from the power conversion module and output power 28 VDC;
an SSPC +/-135VDC module for receiving an output power +/-135VDC and an output power 28VDC from the power conversion module;
an SSPC 28VDC module for receiving an output power 28VDC from the power conversion module; and the number of the first and second groups,
and the COM communication module is used for receiving the output power 28VDC from the power conversion module.
As a preferred scheme of a remote power distribution device architecture integrating multiple power conversion functions, the communication mode of the COM communication module is an AFDX/CAN bus.
Compared with the prior art, the invention has the beneficial effects that: the original centralized power conversion is changed into a distributed type, the power capacity of a single power conversion device is reduced, the original forced air cooling heat dissipation or liquid cooling heat dissipation is not necessary, and natural heat dissipation can be adopted to optimize the heat distribution of an airplane power system; after a new power supply framework is adopted, the number of input power feeder lines of the RPDU is changed from a plurality of former leads into three, and meanwhile, due to the improvement of the voltage level of the feeder lines, the input current can be reduced, the wire diameter of the leads is reduced, and the weight of the airplane cable is reduced from two dimensions; the emergency loop is powered by a storage battery, so that the safety of the airplane is guaranteed; the communication bus supports the AFDX/CAN combination, and the cost of the communication system is reduced.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems solved by the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 shows the RPDU architecture design of B787 in the prior art.
Fig. 2 is a RPDU architecture design integrated with various power conversion functions proposed in this patent.
Fig. 3 is a schematic diagram of the RPDU internal structure according to the present invention, wherein the conversion module includes a plurality of voltage conversion functions.
Fig. 4 shows the design principle of the DC SSPC board of the RPDU of the present patent.
Fig. 5 shows the design principle of the AC SSPC board of the RPDU of the present patent.
Fig. 6 shows the design principle of the DC SSPC channel of the RPDU of this patent.
Fig. 7 shows the design principle of AC SSPC channel of RPDU of this patent.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
RPDU (resilient packet data Unit) architecture design provided by the patent and integrated with various power conversion functions
As shown in fig. 2, in order to simplify the architecture of the aviation power supply system and improve the safety and the economy, it may be considered to integrate the original centralized power conversion device on the aircraft into the RPDU, and for this reason, the following improvements need to be made on the basis of the original RPDU device:
a) a power supply conversion module is added, the power input is changed into a 230VAC/28VDC system from the previous 115VAC/28VDC system, and the input current is reduced by improving the input voltage level, so that the cable diameter is reduced, and the weight of the airplane is reduced;
b) the added power conversion module supports various voltage conversion, and can generate 28VDC, +/-135VDC and +/-270VDC from 230VAC power input so as to meet the requirements of various voltage class loads in a multi-level airplane;
c) the original 28VDC power input is reserved, the input comes from the storage battery, and when the airplane is in a multi-generation failure mode, key electronic equipment on the airplane can still obtain standby power from the storage battery so as to guarantee the flight safety to the maximum extent;
d) the aircraft is further optimized on an external communication bus, the AFDX/TTP combination of B787 is changed into the AFDX/CAN bus combination, and the TTP bus with high price is abandoned, so that the safety of the aircraft is further improved.
In addition, due to the emergence of SSPCs of various voltage specifications, the SSPC board and channel design must be considered accordingly. The patent provides a design principle block diagram of direct current and alternating current SSPC board cards and channels.
After the improvements are made, the RPDU integrated with various power conversion modules can support various SSPC specifications such as 28VDC, 115VAC, +/-135VDC, +/-270VDC, 230VAC and the like, and can meet the requirements of various voltage grades of future multi-electric airplanes.
The RPDU internal principle block diagram provided by the patent has a conversion module with a plurality of voltage conversion functions
As shown in fig. 3, power conversion is performed inside the RPDU to realize load control. The first is the conversion of 235VAC to 28VDC, and the converted 28VDC is OR-operated with an external 28VDC Batt bus to supply power to the 28VDC SSPC, and the latter supplies power to the 28VDC Load.
The 235VAC also performs 115VAC voltage conversion, providing power input to the 115VAC SSPC, and is controlled by the latter to supply power to the 115VAC load.
The 235VAC Bus can be directly used as the power supply input of the 230VAC SSPC to supply power for the 230VAC load.
Similarly, +/-135VDC and +/-270VDC are also converted from the 230VAC input voltage by the internal voltage conversion modules to serve as the power inputs for the RPDU +/-135VDC and +/-270VDC SSPC boards.
Design principle of DC SSPC board card of RPDU
Fig. 4 shows the design principle of the DC SSPC board of the RPDU of the present patent.
The DC SSPC board has two power inputs, one is a 28VDC power input, which comes from the voltage conversion module of the RPDU, and the DC SSPC uses it as its own working power supply. Since the 28VDC is not directly used as an internal control power supply, it is reduced to a digital voltage of 5V/3.3V/1.8V by DC-DC voltage conversion and used as an operating power supply of the main control chip uP.
The other power input of the DC SSPC board also comes from the RPDU power conversion module, and the voltage level of the power conversion module depends on SSPC load, and the voltage levels can be supported by 28VDC, +/-135VDC and +/-270 VDC.
Multiple DC SSPC channels (such as DC SSPC ch1 to chn in the figure) are integrated on each DC SSPC, and the highly integrated channel design improves the power density of the RPDU and reduces the volume and the weight.
The SSPC adopts a dual-redundancy serial bus outside for communicating with a communication board COM of the RPDU.
In addition, the DC SSPC also integrates discrete control, namely the control of the load channel can receive the command of the traversing bus and the control of external discrete quantity. The policy it controls is specified by a configuration file.
EMI filtering processing is additionally arranged on all I/O of the DC SSPC board card so as to improve EMI inhibition capability.
Design principle of AC SSPC board card of RPDU
Fig. 5 shows the design principle of the AC SSPC board of the RPDU of the present patent.
The AC SSPC board has two power inputs, one is a 28VDC power input from the voltage conversion module of the RPDU, which the AC SSPC uses as its operating power supply. Since the 28VDC is not directly used as an internal control power supply, it is reduced to a digital voltage of 5V/3.3V/1.8V by DC-DC voltage conversion and used as an operating power supply of the main control chip uP.
The other power input of the AC SSPC board is also from the RPDU power conversion module, the voltage level of the AC SSPC board depends on the SSPC load, and the voltage levels which can be supported are 115VAC and 230 VAC.
Multiple AC SSPC channels (such as AC SSPC ch1 to chn in the figure) are integrated on each DC SSPC, and the highly integrated channel design improves the power density of the RPDU and reduces the volume and the weight.
The SSPC adopts a dual-redundancy serial bus outside for communicating with a communication board COM of the RPDU.
In addition, the AC SSPC also integrates discrete control, namely the control of the load channel can receive the command of the traversing bus and the control of external discrete quantity. The policy it controls is specified by a configuration file.
EMI filtering processing is additionally arranged on all I/O of the AC SSPC board card so as to improve EMI inhibition capability.
Design principle of DC SSPC channel of RPDU
Fig. 6 shows the design principle of the DC SSPC channel of the RPDU of this patent.
The core device of the power MOS transistor is a power MOS transistor, the on-off control of the power MOS transistor is given by a driver logic (driver logic), and a sampling resistor (sampling resistor) provides a Current signal for Short Circuit protection (Short Circuit) and Current sampling (Current sampling). The channel state sampling (status sampling) is performed by channel voltage sampling.
The control command CMD of the channel comes from the main control chip uP of the DC SSPC board, and the acquired channel state (including short-circuit protection, current sampling, and state sampling) is also fed back to the main control chip uP.
The Isolated DC-DC (Isolated DC-DC) on the channel provides a working power supply for the channel, the EMI module is used for improving the electromagnetic immunity of the channel, the fuse (fuse) is used for failure safety protection, and when the MOS pipe control fails, the fuse can also be used as a backup protection measure, so that the safety factor of the airplane is improved.
The design principle of AC SSPC channel of RPDU
Fig. 7 shows the AC SSPC channel design principle of the RPDU of this patent.
The isolation power supply design, channel driving logic, short-circuit protection, current sampling, state acquisition, EMI suppression and the like are similar to those of the DCSSPC.
The difference is that the AC SSPC channel uses two MOS transistors back-to-back, rather than just one MOS transistor as the DC SSPC channel. In addition, in order to reduce the voltage and current impact generated by the alternating current SSPC at the turn-on and turn-off moments, zero-cross detection logic (VZero cross and izzero cross) is specially designed to realize soft switching.
In order to realize the simultaneous protection of the three-phase alternating-current load, the AC SSPC channel also outputs an Alarm signal for short-circuit protection to the main uP, so as to realize the protection of the three-phase SSPC channel in one cycle.
The foregoing merely represents embodiments of the present invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (2)
1. A remote power distribution device architecture integrating multiple power conversion functions is characterized by comprising,
a power conversion module for receiving an input power 230VAC and an input power 28VDC from the outside and converting them into an output power 230VAC, an output power 115VAC, an output power +/-270VDC, an output power +/-135VDC and an output power 28VDC according to the input power 230VAC and the input power 28 VDC;
an SSPC 230VAC module for receiving an output power 230VAC and an output power 28VDC from the power conversion module;
an SSPC 115VAC module for receiving an output power 115VAC and an output power 28VDC from the power conversion module;
an SSPC +/-270VDC module for receiving output power +/-270VDC from the power conversion module and output power 28 VDC;
an SSPC +/-135VDC module for receiving an output power +/-135VDC and an output power 28VDC from the power conversion module;
an SSPC 28VDC module for receiving an output power 28VDC from the power conversion module; and the number of the first and second groups,
and the COM communication module is used for receiving the output power 28VDC from the power conversion module.
2. The architecture of claim 1, wherein the COM communication module is configured to communicate in AFDX/CAN bus.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117435543A (en) * | 2023-12-20 | 2024-01-23 | 天津航空机电有限公司 | Internal UART bus communication structure and communication method suitable for RPDU |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485704A (en) * | 2014-12-05 | 2015-04-01 | 中国航空工业集团公司第六三一研究所 | Multi-channel dual-redundancy intelligent power supply management system |
| US20170063151A1 (en) * | 2014-05-15 | 2017-03-02 | Airbus Operations Gmbh | Power and data distribution module and method for power and data distribution in an airborne vehicle |
| CN108183612A (en) * | 2018-03-13 | 2018-06-19 | 北京比特大陆科技有限公司 | Expansible parallel operation DC-DC power source device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170063151A1 (en) * | 2014-05-15 | 2017-03-02 | Airbus Operations Gmbh | Power and data distribution module and method for power and data distribution in an airborne vehicle |
| CN104485704A (en) * | 2014-12-05 | 2015-04-01 | 中国航空工业集团公司第六三一研究所 | Multi-channel dual-redundancy intelligent power supply management system |
| CN108183612A (en) * | 2018-03-13 | 2018-06-19 | 北京比特大陆科技有限公司 | Expansible parallel operation DC-DC power source device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117435543A (en) * | 2023-12-20 | 2024-01-23 | 天津航空机电有限公司 | Internal UART bus communication structure and communication method suitable for RPDU |
| CN117435543B (en) * | 2023-12-20 | 2024-04-09 | 天津航空机电有限公司 | Internal UART bus communication structure and communication method suitable for RPDU |
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