Time division multiplexing APU starting control circuit and control method thereof

Abstract

Provided are a time-division multiplexing APU starting control circuit and a control method thereof, wherein the time-division multiplexing APU starting control circuit is characterized by comprising a converter, a storage battery, and an APU starting relay; the converter is connected to an APU starting bus bar and a direct-current main bus bar, wherein a converter starting control contactor is arranged on a line connecting the converter to the APU starting bus bar, and a direct-current output control contactor is arranged on a line connecting the converter to the direct-current main bus bar; the direct-current main bus bar is connected to a direct-current emergency bus bar; the storage battery is connected to a storage battery thermal bus bar and the direct-current emergency bus bar, wherein the storage battery thermal bus bar is connected to the APU starting bus bar, a storage battery starting control contactor is arranged on a line connecting the storage battery thermal bus bar to the APU starting bus bar; a storage battery output control contactor is arranged on a line connecting the storage battery to the direct-current emergency bus bar; the APU starting relay is capable of receiving an APU starting instruction at an input end, is connected to a controller of the converter and a controller of the storage battery at an output end, and is connected to a power supply controller at a control end.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of auxiliary power unit (APU) starting control design, and particularly relates to a time-sharing multiplexing APU starting control circuit and a control method thereof. BACKGROUND

[0002] When an airplane is being inspected on the ground or an aero-engine is not working, an auxiliary power unit (APU) needs to be started to provide electric energy or hydraulic energy for the airplane.

[0003] Currently, the starting modes of the airplane auxiliary power unit (APU) mainly include starting by APU bleed air, starting by APU generator electricity, and starting by battery and converter control electricity. When the airplane auxiliary power unit (APU) is started by battery and converter control electricity, the battery controller and the converter simultaneously receive an APU starting instruction, and control the battery and the converter to supply power to the APU starting bus bar at the same time. In this case, the battery power is insufficient, and the converter simultaneously supplies power to the battery and the APU starting bus bar, which causes a large burden on the converter and easily leads to insufficient starting energy and failure of the APU starting.

[0004] The present application is proposed in view of the above technical defects. SUMMARY

[0005] The purpose of the present application is to provide a time-sharing multiplexing APU starting 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 the present application is as follows:

[0007] In one aspect, a time-sharing multiplexing APU starting control circuit is provided, which comprises a converter, a battery, and an APU starting relay.

[0008] The converter is connected to an APU starting bus bar and a direct current (DC) main bus bar. A converter starting control contactor is arranged on a line connecting the converter to the APU starting bus bar, and a DC output control contactor is arranged on a line connecting the converter to the DC main bus bar. The DC main bus bar is connected to a DC emergency bus bar.

[0009] The battery is connected to a battery hot bus bar and the DC emergency bus bar. The battery hot bus bar is connected to the APU starting bus bar, and a battery starting control contactor is arranged on a line connecting the battery hot bus bar to the APU starting bus bar. A battery output control contactor is arranged on a line connecting the battery to the DC emergency bus bar.

[0010] The APU starting relay has an input end capable of receiving an APU starting instruction, an output end connected to a controller of the converter and a controller of the battery, and a control end connected to a power supply controller.

[0011] When the power controller outputs the power signal to the APU starting relay, the main contact of the APU starting relay is closed, at this time, the APU starting instruction received by the APU starting relay can only be sent to the converter controller to make the DC output control contactor open, the converter starting control contactor closed, the converter supplies power to the APU starting bus bar, and the auxiliary power device APU is controlled to be electrically started.

[0012] When the power controller outputs the power signal to the APU starting relay, the main contact of the APU starting relay is closed, at this time, the APU starting instruction received by the APU starting relay can only be sent to the converter controller to make the DC output control contactor open, the converter starting control contactor closed, the converter supplies power to the APU starting bus bar, and the auxiliary power device APU is controlled to be electrically started.

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

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

[0015] A diode is arranged on the line connecting the DC emergency bus bar to the DC main bus bar.

[0016] The DC emergency bus bar is connected to the emergency equipment.

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

[0018] According to at least one embodiment of the present application, in the time-sharing multiplexing APU starting control circuit described above, the input end of the APU starting 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 a 28V power signal.

[0020] In another aspect, a time-sharing multiplexing APU starting control method is provided, which is implemented based on the time-sharing multiplexing APU starting control circuit described above, and includes:

[0021] When on the ground, the power controller outputs a 28V power signal to the APU starting relay to make the main contact of the APU starting relay closed, the APU starting instruction received by the APU starting relay is sent to the converter controller to make the DC output control contactor open, the converter starting control contactor closed, the converter supplies power to the APU starting bus bar, and the auxiliary power device APU is controlled to be electrically started.

[0022] When in the air, the control power controller disconnects the 28V power signal output to the APU starting relay, the main contact of the APU starting relay is disconnected, the APU starting instruction received by the APU starting relay is sent to the battery controller, the battery output control contactor is disconnected, the battery starting control contactor is connected, the battery supplies power to the APU starting bus bar, and the control makes the auxiliary power device APU electrically start.

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

[0024] The application provides a time-division multiplexing APU starting control circuit and a control method thereof, an APU starting relay is designed, APU starting instructions are time-division multiplexed, on the ground, the APU starting bus bar can be independently powered by a transformer, the auxiliary power device APU is electrically started, the battery power can be saved, in the air, the APU starting bus bar can be independently powered by a battery, the auxiliary power device APU is electrically started, the transformer supplies power to the on-board direct-current main bus bar and the emergency bus bar, the safety of the airplane is ensured, and the situation that the battery power is insufficient, the transformer supplies power to the battery and the APU starting bus bar at the same time, the transformer is heavily burdened, and the starting energy causes the auxiliary power device APU to fail to start can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the time-division multiplexing APU starting control circuit provided by the application.

[0026] In order to better illustrate the present application, some components in the drawings can be omitted, enlarged or reduced, and do not represent the actual product size, and in addition, the drawings are only used for illustrative description and cannot be understood as a limitation of the present application. DETAILED DESCRIPTION

[0027] In order to make the technical solutions of the present application and the advantages thereof clearer, the technical solutions of the present application will be further clearly and completely described below with reference to the drawings, and it can be understood that the specific embodiments described herein are only part of the embodiments of the present application, and are only used to explain the present application, but not to limit the present application. It should be noted that, in order to facilitate description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the general design.

[0028] In addition, unless otherwise defined, technical terms or scientific terms used in the description of the application shall be the general meaning understood by those skilled in the art to which the application belongs. The words used to indicate the position in the description of the application are only used to indicate the relative direction or positional relationship, and the relative positional relationship may also change accordingly when the absolute position of the described object changes. The "includes" used in the description of the application indicates that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0029] In addition, it should be further pointed out that, unless otherwise explicitly specified and limited, the "installation", "connection" and similar words used in the description of the application should be understood in a broad sense, for example, the connection can be fixed connection or detachable connection; can be mechanical connection or electrical connection; can be directly connected or indirectly connected through intermediate medium, and those skilled in the art can understand the specific meaning of the application according to the specific circumstances.

[0030] A time division multiplexing APU starting control circuit, as shown in Figure 1 It comprises a converter, a battery and an APU starting relay.

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

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

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

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

[0035] The APU starting relay is connected to the aircraft control system at the input end, can receive the APU starting instruction, is connected to the controller of the converter and the controller of the battery at the output end, and is connected to the power supply controller at the control end. The power supply controller is connected to the aircraft control system and can control the output of 28V power supply signal.

[0036] When the power controller outputs the 28V power signal to the APU starting relay, the main contact of the APU starting relay is closed, at this time, the APU starting instruction received by the APU starting relay can only be sent to the battery controller to make the battery output control contactor open, the battery starting control contactor closed, the battery supplies power to the APU starting bus bar, and controls the electric starting of the auxiliary power unit APU.

[0037] When the power controller outputs the 28V power signal to the APU starting relay, the main contact of the APU starting relay is closed, at this time, the APU starting instruction received by the APU starting relay can only be sent to the battery controller to make the battery output control contactor open, the battery starting control contactor closed, the battery supplies power to the APU starting bus bar, and controls the electric starting of the auxiliary power unit APU.

[0038] The time-sharing multiplexing APU starting control circuit disclosed in the above embodiment designs an APU starting relay, time-sharing multiplexes APU starting instructions, and can supply power to the APU starting bus bar independently by the converter on the ground to electrically start the auxiliary power unit APU, thereby saving the battery power, can supply power to the APU starting bus bar independently by the battery in the air to electrically start the auxiliary power unit APU, the converter supplies power to the on-board DC main bus bar and emergency bus bar, ensures the safe flight of the aircraft, and can avoid the situation that the battery power is insufficient when the battery and the converter supply power to the APU starting bus bar at the same time, the converter supplies power to the battery and the APU starting bus bar at the same time, and the starting energy causes the failure of the starting of the auxiliary power unit APU.

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

[0040] On the ground, the power controller is controlled to output the 28V power signal to the APU starting relay, the main contact of the APU starting relay is closed, the APU starting instruction received by the APU starting relay is sent to the converter controller to make the DC output control contactor open, the converter starting control contactor closed, the converter supplies power to the APU starting bus bar, and controls the electric starting of the auxiliary power unit APU.

[0041] When in the air, the control power controller disconnects the 28V power signal output to the APU starting relay, the main contact of the APU starting relay is disconnected, the APU starting instruction received by the APU starting relay is sent to the battery controller, the battery output control contactor is disconnected, the battery starting control contactor is connected, the battery supplies power to the APU starting bus bar, and the control makes the auxiliary power device APU electrically start.

[0042] The time-sharing multiplexing APU starting control method disclosed in the above embodiment is implemented based on the time-sharing multiplexing APU starting control circuit disclosed in the above embodiment, which is described simply, and the specific details can be referred to the relevant description of the time-sharing multiplexing APU starting control circuit part. The technical effects can be referred to the technical effects of the relevant part of the time-sharing multiplexing APU starting control circuit, and will not be described here.

[0043] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings. It should be understood by those skilled in the art that the protection scope of the present application is obviously not limited to these specific embodiments. Without deviating from the principles of the present application, those skilled in the art can make equivalent changes or replacements to the related technical features. The technical solutions after these changes or replacements will fall within the protection scope of the present application.

Claims

1. A time-division multiplexing APU start-up control circuit, characterized in that, Includes converter, battery, APU starter relay; The converter connects to the APU starter busbar and the DC main busbar. A converter starter control contactor is installed on the line connecting the converter to the APU starter busbar, and a DC output control contactor is installed on the line connecting the converter to the DC main busbar. The DC main busbar is connected to the DC emergency busbar. The battery is connected to a battery thermal busbar and a DC emergency busbar. The battery thermal busbar is connected to the APU starting busbar, and a battery starting control contactor is installed on the line connecting the APU starting busbar. A battery output control contactor is installed on the line connecting the battery to the DC emergency busbar. The APU start relay input terminal can receive APU start command, the output terminal is connected to the converter controller and the battery controller, and the control terminal is connected to the power controller. When the power controller outputs a power signal to the APU start relay, the main contacts of the APU start relay are closed. At this time, the APU start command received by the APU start relay can only be sent to the converter controller, causing the DC output control contactor to open and the converter start control contactor to close. The converter supplies power to the APU start busbar, controlling the auxiliary power unit APU to start electrically. When the power controller disconnects the power output signal to the APU start relay, the main contacts of the APU start relay open. At this time, the APU start command received by the APU start relay can only be sent to the battery controller, causing the battery output control contactor to open and the battery start control contactor to close. The battery then supplies power to the APU start busbar, controlling the APU to start electrically.

2. The time-division multiplexing APU start-up control circuit according to claim 1, characterized in that, The converter connects to a ground power source or an aircraft power source and outputs 28V DC power.

3. The time-division multiplexing APU start-up control circuit according to claim 2, characterized in that, The DC main busbar connects to the airborne equipment; A diode is installed on the line connecting the DC main busbar to the DC emergency busbar; DC emergency busbars are used to connect emergency equipment.

4. The time-division multiplexing APU start-up control circuit according to claim 3, characterized in that, A diode is installed on the line connecting the battery to the DC emergency busbar.

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

6. A time-division multiplexing APU start-up control method, implemented based on the time-division multiplexing APU start-up control circuit of claim 1, characterized in that, include: When on the ground, the power controller outputs a 28V power signal to the APU start relay, which closes the main contacts of the APU start relay. The APU start relay receives the APU start command and sends it to the converter controller, which disconnects the DC output control contactor and connects the converter start control contactor. The converter supplies power to the APU start busbar, controlling the APU to start electrically. When in the air, the power controller disconnects the 28V power signal output to the APU start relay, causing the main contacts of the APU start relay to open. The APU start relay receives the APU start command and sends it to the battery controller, causing the battery output control contactor to open and the battery start control contactor to close. The battery then supplies power to the APU start busbar, controlling the APU to start electrically.

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