Time division multiplexing APU starting control circuit and control method thereof

Abstract

The invention provides a time division multiplexing APU starting control circuit and a control method thereof, and the time division multiplexing APU starting control circuit is characterized in that the time division multiplexing APU starting control circuit comprises a converter, a storage battery and an APU starting relay; the converter is connected with an APU starting bus bar and a direct-current main bus bar, a converter starting control contactor is arranged on a line, connected with the APU starting bus bar, of the converter, and a direct-current output control contactor is arranged on a line, connected with the direct-current main bus bar, of the converter; the direct-current main bus bar is connected with the direct-current emergency bus bar; the storage battery is connected with a storage battery hot bus bar and a direct current emergency bus bar, the storage battery hot bus bar is connected with an APU starting bus bar, and a storage battery starting control contactor is arranged on a line connected with the APU starting bus bar; a storage battery output control contactor is arranged on a line where the storage battery is connected with the direct-current emergency bus bar; the input end of the APU starting relay can receive an APU starting instruction, the output end is connected with the controller of the converter and the controller of the storage battery, and the control end is connected with the power supply controller.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft auxiliary power unit APU start control design, and specifically relates to a time-sharing multiplexed APU start control circuit and a control method thereof. Background Art

[0002] When the aircraft is undergoing ground inspection at the airport or the aircraft engine is not working, it is necessary to start the auxiliary power unit APU to provide electrical energy or hydraulic energy to the aircraft.

[0003] At present, the main starting modes of the aircraft auxiliary power unit APU include starting by auxiliary power unit APU bleed air, electric starting by auxiliary power unit APU generator, and electric starting controlled by battery and converter. Among them, when the aircraft auxiliary power unit APU is electrically started by battery and converter, the battery controller and converter receive the APU starting command at the same time, and control the battery and converter to supply power to the APU starting bus at the same time. There is a situation where the battery power is insufficient and the converter supplies power to the battery and APU starting bus at the same time. In this case, the converter is burdened with a large burden, and insufficient starting energy is prone to occur, resulting in failure to start the auxiliary power unit APU.

[0004] This application is proposed in view of the above-mentioned technical defects. Summary of the invention

[0005] The purpose of the present application is to provide a time-division multiplexing APU start control circuit and a control method thereof to overcome or alleviate at least one aspect of the known technical defects.

[0006] The technical solution of this application is:

[0007] On the one hand, a time-division multiplexing APU starting control circuit is provided, including a converter, a battery, and an APU starting relay;

[0008] The converter is connected to the APU starting bus and the DC main bus, wherein a converter starting control contactor is provided on the line connecting the converter to the APU starting bus, and a DC output control contactor is provided on the line connecting the converter to the DC main bus; the DC main bus is connected to the DC emergency bus;

[0009] The battery is connected to a battery hot bus bar and a DC emergency bus bar, wherein the battery hot bus bar is connected to an APU starting bus bar, and a battery starting control contactor is provided on the line connecting the APU starting bus bar; a battery output control contactor is provided on the line connecting the battery to the DC emergency bus bar;

[0010] The input end of the APU start relay can receive the APU start command, the output end is connected to the controller of the converter and the controller of the battery, and the control end is connected to the power supply controller;

[0011] When the power controller outputs a power signal to the APU start relay, the main contact of the APU start relay is connected. At this time, the APU start command received by the APU start relay can only be sent to the converter controller, so that the DC output control contactor is disconnected and the converter start control contactor is connected. The converter supplies power to the APU start bus bar to control the auxiliary power unit APU to start electrically.

[0012] When the power controller disconnects the power signal output to the APU start relay, the main contacts of the APU start relay are disconnected. At this time, the APU start command received by the APU start relay can only be sent to the battery controller, so that the battery output control contactor is disconnected and the battery start control contactor is connected. The battery supplies power to the APU start bus and controls the auxiliary power unit APU to start electrically.

[0013] According to at least one embodiment of the present application, in the above-mentioned time-division multiplexing APU starting control circuit, the converter is connected to the ground power supply or the power supply on the aircraft to output a 28V DC power supply.

[0014] According to at least one embodiment of the present application, in the above-mentioned time-division multiplexing APU starting control circuit, the DC main bus is connected to the airborne equipment;

[0015] A diode is provided on the line connecting the DC main busbar to the DC emergency busbar;

[0016] The DC emergency bus is used to connect emergency equipment.

[0017] According to at least one embodiment of the present application, in the above-mentioned time-division multiplexing APU starting control circuit, a diode is provided on the line connecting the battery to the DC emergency bus.

[0018] According to at least one embodiment of the present application, in the above-mentioned time-division multiplexing APU start control circuit, the input terminal of the APU start relay is connected to the aircraft control system;

[0019] The power controller is connected to the aircraft control system and can control the output of 28V power signal.

[0020] On the other hand, a time-division multiplexing APU start control method is provided, which is implemented based on the above-mentioned time-division multiplexing APU start control circuit, and includes:

[0021] When on the ground, the control power supply controller outputs a 28V power signal to the APU start relay, so that the main contact of the APU start relay is turned on. The APU start relay receives the APU start command and sends it to the converter controller, so that the DC output control contactor is disconnected and the converter start control contactor is turned on. The converter supplies power to the APU start bus bar, and controls the auxiliary power unit APU to start electrically.

[0022] When in the air, the control power controller disconnects the 28V power signal output to the APU starting relay, disconnecting the main contacts of the APU starting relay. The APU starting command received by the APU starting relay is sent to the battery controller, disconnecting the battery output control contactor and connecting the battery starting control contactor. The battery supplies power to the APU starting bus, controlling the auxiliary power unit APU to start electrically.

[0023] This application has at least the following beneficial technical effects:

[0024] Provided are a time-sharing multiplexing APU starting control circuit and a control method thereof, an APU starting relay is designed, and an APU starting instruction is time-sharing multiplexing. When on the ground, a converter can independently supply power to an APU starting bus bar to electrically start an auxiliary power unit APU, thereby saving battery power. When in the air, a battery can independently supply power to an APU starting bus bar to electrically start an auxiliary power unit APU. The converter supplies power to an onboard DC main bus bar and an emergency bus bar to ensure safe flight of the aircraft, and can avoid the situation where the battery and the converter supply power to the APU starting bus bar at the same time, the battery power is insufficient, and the converter supplies power to the battery and the APU starting bus bar at the same time, resulting in a heavy burden on the converter, and the starting energy causes the auxiliary power unit APU to fail to start. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a time-division multiplexing APU start control circuit provided in an embodiment of the present application.

[0026] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be construed as limitations on the present application. DETAILED DESCRIPTION

[0027] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be described in further detail in detail and in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design.

[0028] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application indicates that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0029] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0030] A time-division multiplexing APU starting control circuit, such as Figure 1 As shown, it includes a converter, a battery, and an APU starting relay.

[0031] The converter is connected to the ground power supply or the aircraft power supply and outputs 28V DC power supply.

[0032] The converter is connected to the APU starting bus and the DC main bus, wherein a converter starting control contactor is arranged on the line connecting the converter to the APU starting bus, and a DC output control contactor is arranged on the line connecting the converter to the DC main bus.

[0033] The DC main bus is connected to the airborne equipment and the DC emergency bus, and a diode is arranged on the line connected to the DC emergency bus. The DC emergency bus is connected to the emergency equipment.

[0034] The battery is connected to a battery hot bus and a DC emergency bus, wherein the battery hot bus is connected to an APU starting bus, and a battery starting control contactor is arranged on the line connecting the APU starting bus; a battery output control contactor and a diode are arranged on the line connecting the battery to the DC emergency bus.

[0035] The input end of the APU start relay is connected to the aircraft control system and can receive the APU start command. The output end is connected to the converter controller and the battery controller. The control end is connected to the power controller. The power controller is connected to the aircraft control system and can control the output of a 28V power signal.

[0036] When the power controller outputs a 28V power signal to the APU start relay, the main contact of the APU start relay is connected. At this time, the APU start command received by the APU start relay can only be sent to the converter controller, so that the DC output control contactor is disconnected, the converter start control contactor is connected, and the converter supplies power to the APU start bus, controlling the auxiliary power unit APU to start electrically. After the auxiliary power unit APU is started, the DC output control contactor is restored to be connected, the converter start control contactor is restored to be disconnected, and the converter supplies power to the DC main bus and its DC emergency bus.

[0037] When the power controller disconnects the 28V power signal output to the APU start relay, the main contact of the APU start relay is disconnected. At this time, the APU start command received by the APU start relay can only be sent to the battery controller, so that the battery output control contactor is disconnected, the battery start control contactor is connected, and the battery supplies power to the APU start bus, controlling the auxiliary power unit APU to start electrically. After the auxiliary power unit APU is started, the battery output control contactor is restored to be connected, the battery start control contactor is restored to be disconnected, and the battery supplies power to the DC emergency bus.

[0038] The time-sharing multiplexing APU starting control circuit disclosed in the above embodiment designs an APU starting relay and time-sharing multiplexing APU starting instructions. When on the ground, the converter can independently power the APU starting bus to electrically start the auxiliary power unit APU, which can save battery power. When in the air, the battery can independently power the APU starting bus to electrically start the auxiliary power unit APU. The converter supplies power to the onboard DC main bus and emergency bus to ensure the safe flight of the aircraft, and can avoid the situation where the battery and the converter simultaneously power the APU starting bus, the battery is insufficient, and the converter simultaneously powers the battery and the APU starting bus, resulting in a heavy burden on the converter, and the starting energy causes the auxiliary power unit APU to fail to start.

[0039] Based on the time-division multiplexing APU start control circuit disclosed in the above embodiment, a time-division multiplexing APU start control method is designed.

[0040] When on the ground, the control power supply controller outputs a 28V power signal to the APU start relay, so that the main contact of the APU start relay is turned on. The APU start relay receives the APU start command and sends it to the converter controller, so that the DC output control contactor is disconnected and the converter start control contactor is turned on. The converter supplies power to the APU start bus bar, and controls the auxiliary power unit APU to start electrically.

[0041] When in the air, the control power controller disconnects the 28V power signal output to the APU starting relay, disconnecting the main contacts of the APU starting relay. The APU starting command received by the APU starting relay is sent to the battery controller, disconnecting the battery output control contactor and connecting the battery starting control contactor. The battery supplies power to the APU starting bus, controlling the auxiliary power unit APU to start electrically.

[0042] The time-sharing multiplexing APU start control method disclosed in the above embodiment is implemented based on the time-sharing multiplexing APU start control circuit disclosed in the above embodiment. The description is relatively simple. For specific related matters, please refer to the relevant description of the time-sharing multiplexing APU start control circuit part. Its technical effect can also refer to the technical effect of the relevant part of the time-sharing multiplexing APU start control circuit, which will not be repeated here.

[0043] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A time-division multiplexing APU starting control circuit, characterized in that: Includes converter, battery, APU starter relay; The converter is connected to the APU starting bus and the DC main bus, wherein a converter starting control contactor is provided on the line connecting the converter to the APU starting bus, and a DC output control contactor is provided on the line connecting the converter to the DC main bus; the DC main bus is connected to the DC emergency bus; The battery is connected to a battery hot bus bar and a DC emergency bus bar, wherein the battery hot bus bar is connected to an APU starting bus bar, and a battery starting control contactor is provided on the line connecting the APU starting bus bar; a battery output control contactor is provided on the line connecting the battery to the DC emergency bus bar; The input end of the APU start relay can receive the APU start command, the output end is connected to the controller of the converter and the controller of the battery, and the control end is connected to the power supply controller; When the power controller outputs a power signal to the APU start relay, the main contact of the APU start relay is connected. At this time, the APU start command received by the APU start relay can only be sent to the converter controller, so that the DC output control contactor is disconnected and the converter start control contactor is connected. The converter supplies power to the APU start bus bar to control the auxiliary power unit APU to start electrically. When the power controller disconnects the power signal output to the APU start relay, the main contacts of the APU start relay are disconnected. At this time, the APU start command received by the APU start relay can only be sent to the battery controller, so that the battery output control contactor is disconnected and the battery start control contactor is connected. The battery supplies power to the APU start bus and controls the auxiliary power unit APU to start electrically.

2. The time-division multiplexing APU start control circuit according to claim 1, characterized in that: The converter is connected to the ground power supply or the aircraft power supply and outputs 28V DC power supply.

3. The time-division multiplexing APU start control circuit according to claim 2, characterized in that: The DC main busbar connects the onboard equipment; A diode is provided on the line connecting the DC main busbar to the DC emergency busbar; The DC emergency bus is used to connect emergency equipment.

4. The time-division multiplexing APU starting control circuit according to claim 3, characterized in that: A diode is provided on the line connecting the battery to the DC emergency bus.

5. The time-division multiplexing APU start control circuit according to claim 4, characterized in that: The input of the APU start relay is connected to the aircraft control system; The power controller is connected to the aircraft control system and can control the output of 28V power signal.

6. A time-division multiplexing APU start control method, implemented based on the time-division multiplexing APU start control circuit according to claim 1, characterized in that: include: When on the ground, the control power supply controller outputs a 28V power signal to the APU start relay, so that the main contact of the APU start relay is turned on. The APU start relay receives the APU start command and sends it to the converter controller, so that the DC output control contactor is disconnected and the converter start control contactor is turned on. The converter supplies power to the APU start bus bar, and controls the auxiliary power unit APU to start electrically. When in the air, the control power controller disconnects the 28V power signal output to the APU starting relay, disconnecting the main contacts of the APU starting relay. The APU starting command received by the APU starting relay is sent to the battery controller, disconnecting the battery output control contactor and connecting the battery starting control contactor. The battery supplies power to the APU starting bus, controlling the auxiliary power unit APU to start electrically.

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