Ground starting power supply for multi-system modular aircraft

Abstract

The invention relates to the technical field of aviation ground power supplies, and particularly discloses a ground starting power supply for a multi-system modular aircraft, which comprises a power supply main body, a power supply module with multiple output voltage systems and a charging module, and is characterized in that the power supply main body comprises a monitoring module and a rear rectification module; the monitoring module is used for monitoring the working state and the operation mode of the power supply module. The invention provides a multi-system modular aviation ground power supply, which realizes flexible selection and matching of multiple voltage systems through modular design, improves the adaptability and the use efficiency of the power supply, can select a parallel redundancy mode to improve the reliability of the system, and has the advantages of low noise, environmental protection, convenience in maintenance and the like. The maintenance and replacement of the power supply module are more convenient and faster, the maintenance and time cost is reduced, and the power supply module is worthy of popularization and application in the technical field of aviation ground power supplies.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation ground power supply, and in particular to a ground starting power supply for multi-standard modular aircraft. Background Art

[0002] With the rapid development of aviation, the demand for ground power supply at airports is growing. Most of the existing aviation ground power supplies adopt a single standard design with single functions, which cannot meet the needs of different types of aircraft for diverse power supply standards. At the same time, traditional power supplies have problems such as high noise, difficult maintenance, and low work efficiency, which seriously affect the use effect of aviation ground power supplies. Therefore, designing an efficient and stable multi-standard modular aviation ground power supply is of great significance in the field of aviation ground power supply technology. Therefore, the present invention proposes a multi-standard modular aircraft ground starting power supply to solve the problems mentioned in the above background technology. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-standard, modular aviation ground power supply. Through modular design, flexible selection of multiple voltage standards can be achieved, the adaptability and utilization efficiency of the power supply can be improved, and battery modules can be optionally configured to solve the risk of power outages during the power supply process. At the same time, the modular design makes maintenance work more convenient.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A multi-standard modular ground starting power supply for aircraft, comprising a power supply body, a power supply module with multiple output voltage standards and a charging module, wherein the power supply body comprises a monitoring module and a post-rectifier module;

[0006] The monitoring module is used to monitor the working state and operation mode of the power module;

[0007] The post-rectifier module is used to rectify the AC input power into the DC power required by each power module;

[0008] The power module includes power module one, power module two, power module three and power module four, wherein power module one is an AC 115V 400Hz conversion module, power module two is a DC 28V conversion module, power module three is a DC 70V module, and power module four is a DC 270V module. The four modules are used to convert the DC power output by the rectifier module into the voltage standards required by each module;

[0009] When power module 1 needs to provide 115V AC power, the AC conversion mode is used to power devices that require 400Hz AC power. When power module 2 needs to provide 28V DC power, the DC conversion mode is used to power low-power devices on the aircraft. When power module 3 needs to provide 70V DC power, the DC conversion mode is used to power high-power devices. When power module 4 needs to provide 270V DC power, the DC conversion mode is used to power high-power load devices. When the system load changes, the monitoring module automatically adjusts the power module working mode to ensure that each module provides the correct voltage format for its respective load when needed.

[0010] Preferably, power module 1, power module 2, power module 3 and power module 4 in the power module are connected in sequence through DC cables or board-level connections, and the system voltage is superimposed from each module in turn, and the current remains consistent. It is used in application scenarios with higher voltage requirements. Although the current is the same, the voltage distribution of the power module may be uneven. Therefore, special attention should be paid to voltage balance to prevent a module from being overloaded. Usually, a voltage equalizer (such as a differential amplifier) ​​is used in the design to adjust the voltage distribution. Communication between modules is generally carried out through a serial bus (such as CAN, I2C or SPI), and the main control unit can monitor the status of each module (such as voltage, current, temperature, etc.) in real time.

[0011] Preferably, the power module and the monitoring module transmit data through a digital communication interface (such as I2C, CAN bus, RS-485, Modbus, etc.). The monitoring module obtains the status information of the power module (such as voltage, current, temperature, etc.) in real time, and adjusts the working state of the power supply according to the feedback. The monitoring module obtains the working state of the power module in real time through sensors and data interfaces, and the data is transmitted to the controller or management system through the communication interface. When the monitoring module detects that the output of the power module is abnormal (such as overcurrent, overvoltage, overheating, etc.), it usually feeds back to the power module through a control signal, thereby starting a protection mechanism such as current limiting, shutdown, alarm, etc. The monitoring module can also send control instructions to the power module (such as adjusting the output voltage, current, etc.) to achieve load regulation or power protection.

[0012] Preferably, the power module and the control system generally exchange data through digital or analog signals to ensure the coordinated operation of the system. To ensure the coordinated operation of the system, the signal connection includes: analog voltage feedback, digital communication protocol (I2C, SPI, RS-485, etc.), pulse width modulation (PWM, etc.). The control system is adjusted through the real-time data received from the power module, and the adjustment parameters include output voltage, current, frequency, etc.

[0013] Preferably, the power supply body also includes a bidirectional power converter, which realizes bidirectional energy flow between the power module and the charging module. The working principle of the bidirectional power converter is based on power electronics technology, and the bidirectional flow of energy is realized by controlling the rectification and inversion process. When the power module is supplying power, the remaining energy can be used to charge the battery to ensure that the battery is always in the best charging state. When the system load fluctuates, the energy flow direction is flexibly switched according to demand to avoid excessive consumption of battery power.

[0014] Preferably, the power supply body further includes a heat exchanger, and the heat generated by the power supply module is discharged through the heat exchanger. A heat conduction channel is provided between each power supply module to ensure that the temperature of each module is maintained within a reasonable range.

[0015] Preferably, the power supply body further includes a fuse and a voltage stabilizer, the fuse is used to protect the power supply module from being damaged by excessive current, and the voltage stabilizer is used to protect the system from being impacted by overvoltage.

[0016] Preferably, the charging module is used to charge the battery pack. The charging module draws power from the direct current output by the rectifier module and charges the battery pack by controlling the voltage and current.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The power supply of the present invention supports multiple voltage systems such as AC single-phase and three-phase 115V400Hz, DC 28V, DC 56V, DC 70V, and DC 270V to meet the power supply requirements of different types of aircraft. It has the characteristics of lightweight, modularization, and high efficiency. It uses the third-generation semiconductor silicon carbide as the core device. The power unit adopts a modular design and has the functions of intelligent monitoring, automatic diagnosis, fault warning, and self-repair. It can reduce human intervention and improve the autonomous operation capability and maintainability of the power supply system.

[0019] 2. The PFC circuit of the present invention adopts a three-level switch to reduce the stress of semiconductor devices. The DCDC circuit adopts a phase-shifted full-bridge topology and adopts a circuit structure of two-way interleaving, primary-side parallel and secondary-side series. The primary MOS tube realizes soft opening, and the secondary side adopts a SiC diode with almost no switching loss, which greatly reduces the switching loss of the power tube and the heating of the device, and perfectly achieves the goals of wide output voltage range, high efficiency, high reliability and low noise. At the same time, wide-bandwidth loop control, interleaved control and multi-stage filtering design are adopted to control the peak-to-peak value of the output voltage ripple within 0.5%.

[0020] In summary, the present invention provides a multi-standard modular aviation ground power supply. Through modular design, flexible selection of multiple voltage standards is achieved, the adaptability and utilization efficiency of the power supply are improved, and the parallel redundant mode can be selected to improve the reliability of the system. It has the advantages of low noise, environmental protection, and easy maintenance. The maintenance and replacement of the power supply module are more convenient and quick, which reduces maintenance and time costs. It is worthy of promotion and application in the field of aviation ground power supply technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an appearance diagram of a multi-standard modular aircraft ground starting power supply proposed by the present invention;

[0022] Figure 2 The present invention provides a schematic diagram of the structure and connection relationship of a ground starting power supply for a multi-standard modular aircraft. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Reference Figure 1-2 A multi-standard modular ground starting power supply for aircraft includes a power supply body, power modules with multiple output voltage standards and a charging module. The power supply body includes a monitoring module and a post-rectifier module. The monitoring module is used to monitor the working status and operation mode of the power module. The monitoring module can collect the input, output voltage, working status, temperature and other parameters of each power module, and provide fault alarm, early warning and other functions. In addition, the monitoring module can also perform system self-diagnosis to facilitate maintenance and inspection by operators. The post-rectifier module is used to rectify the AC input power into the DC power required by each power module. This DC The direct current is supplied to different power modules so that they can further adjust the voltage to the required output voltage format. The design of the rectifier module ensures efficient and stable output, and at the same time, protection mechanisms such as overload and overheating should be considered. The power modules include power module 1, power module 2, power module 3 and power module 4, among which power module 1 is an AC 115V400Hz conversion module, power module 2 is a DC 28V conversion module, power module 3 is a DC 70V module, and power module 4 is a DC 270V module. The four modules are used to convert the direct current output by the rectifier module into the voltage format required by each;

[0025] Furthermore, the power module adopts a modular design. Power modules of different voltage standards can be selected and combined according to actual needs to achieve flexible selection of multiple voltage standards. The same power module can also be connected in parallel according to the power level requirements to achieve the purpose of capacity expansion and redundancy. When power module 1 needs to provide 115V AC, the AC conversion mode is used to power equipment that requires 400Hz AC. It is suitable for equipment on aircraft that requires this kind of AC power. It is usually used for AC power required by certain aviation equipment (such as radar, communication systems, etc.). When power module 2 needs to provide 28V DC, the DC conversion mode is used to provide 28V DC for aircraft. Low-power equipment on the aircraft is powered. Many avionics equipment, control systems, lighting equipment, etc. use 28V DC. When power module three needs to provide 70V DC, the DC conversion mode is used to power high-power equipment, such as the auxiliary power unit (APU) or other large power demand systems. When power module four needs to provide 270V DC, the DC conversion mode is used to power high-power load equipment, such as the aircraft's power system, starting system or some other high-power equipment. When the system has a load change, the monitoring module automatically adjusts the power module working mode to ensure that each module provides the correct voltage format for its own load when needed;

[0026] Furthermore, power module 1, power module 2, power module 3 and power module 4 in the power module are connected in sequence through DC cables or board-level connections. The system voltage is superimposed from each module in turn, and the current remains consistent. It is used in application scenarios with higher voltage requirements. Although the current is the same, the voltage distribution of the power module may be uneven. Therefore, special attention should be paid to voltage balance to prevent a certain module from being overloaded. Usually, a voltage equalizer (such as a differential amplifier) ​​is used in the design to adjust the voltage distribution. Communication between modules is generally carried out through a serial bus (such as CAN, I2C or SPI). The main control unit can monitor the status of each module (such as voltage, current, temperature, etc.) in real time. The power module and the monitoring module communicate through digital communication. The monitoring module uses an interface (such as I2C, CAN bus, RS-485, Modbus, etc.) to transmit data. The monitoring module obtains the status information of the power module (such as voltage, current, temperature, etc.) in real time and adjusts the working state of the power supply according to the feedback. The monitoring module obtains the working state of the power module in real time through sensors and data interfaces, and transmits the data to the controller or management system through the communication interface. When the monitoring module detects that the output of the power module is abnormal (such as overcurrent, overvoltage, overheating, etc.), it usually feeds back to the power module through a control signal, thereby starting a protection mechanism such as current limiting, shutdown, alarm, etc. The monitoring module can also send control instructions to the power module (such as adjusting the output voltage, current, etc.) to achieve load regulation or power protection;

[0027] Furthermore, the power module and the control system generally exchange data through digital or analog signals to ensure the coordinated operation of the system. The signal connection includes: analog voltage feedback, digital communication protocol (I2C, SPI, RS-485, etc.), pulse width modulation (PWM, etc.). The control system is adjusted through the real-time data received from the power module. The adjustment parameters include output voltage, current, frequency, etc. The power supply body also includes a bidirectional power converter, which realizes the bidirectional energy flow between the power module and the charging module. The working principle of the bidirectional power converter is based on power electronics technology. By controlling the rectification and inversion process, the bidirectional flow of energy is realized. When the power module supplies power, the remaining energy can be used to charge the battery to ensure that the battery is always in the best charging state. When the system load fluctuates, the energy flow direction is flexibly switched according to demand to avoid excessive consumption of battery power. The power supply body also includes a heat exchanger. The heat generated by the power module is exported through the heat exchanger. A thermal conduction channel is set between each power module to ensure that the temperature of each module is kept within a reasonable range.

[0028] Furthermore, the power supply body also includes a fuse and a voltage stabilizer. The fuse protects the power module from damage caused by excessive current, and the voltage stabilizer protects the system from overvoltage shock. The charging module is used to charge the battery pack. The charging module draws power from the DC power output by the rectifier module and charges the battery pack by controlling the voltage and current. The power supply system adopts a modular design. According to actual needs, users can choose modules with different output voltages and combine them together to meet the power supply requirements of various devices and occasions. When the power demand increases, the system capacity can be expanded by connecting the same power module in parallel, or redundancy can be improved by adding modules. Connecting multiple identical power modules in parallel can not only increase the output power, but also continue to provide power through other modules when a module fails, thereby ensuring the stability and reliability of the system. The charging module has an automatic control function, which can automatically adjust the charging current and voltage according to the status of the battery to ensure the safety and stability of the charging process and extend the service life of the battery. The charging module has an overcharge protection mechanism to avoid safety problems caused by excessive battery charging, such as short circuit protection, overload protection, over-temperature protection, etc., to ensure safety during the charging process.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ground starting power supply for multi-standard modular aircraft, characterized in that: It includes a power supply body, a power supply module with multiple output voltage formats and a charging module, wherein the power supply body includes a monitoring module and a post-rectifier module; The monitoring module is used to monitor the working state and operation mode of the power module; The post-rectifier module is used to rectify the AC input power into the DC power required by each power module; The power module includes power module one, power module two, power module three and power module four, wherein power module one is an AC 115V 400Hz conversion module, power module two is a DC 28V conversion module, power module three is a DC 70V module, and power module four is a DC 270V module. The four modules are used to convert the DC power output by the rectifier module into the voltage standards required by each module; When power module 1 needs to provide 115V AC power, the AC conversion mode is used to power devices that require 400Hz AC power. When power module 2 needs to provide 28V DC power, the DC conversion mode is used to power low-power devices on the aircraft. When power module 3 needs to provide 70V DC power, the DC conversion mode is used to power high-power devices. When power module 4 needs to provide 270V DC power, the DC conversion mode is used to power high-power load devices. When the system load changes, the monitoring module automatically adjusts the power module working mode to ensure that each module provides the correct voltage format for its respective load when needed.

2. The multi-standard modular aircraft ground starting power supply according to claim 1, characterized in that: The power module 1, the power module 2, the power module 3 and the power module 4 in the power module are connected in sequence through a DC cable or a board-level connection, and the system voltage is superimposed from each module in sequence, and the current remains consistent.

3. The multi-standard modular aircraft ground starting power supply according to claim 1, characterized in that: The power module and the monitoring module transmit data via a digital communication interface. The monitoring module obtains status information of the power module in real time. The monitoring module obtains the working status of the power module in real time via sensors and data interfaces, and the data is transmitted to the controller or management system via the communication interface.

4. The multi-standard modular aircraft ground starting power supply according to claim 1, characterized in that: The power module and the control system generally exchange data through digital or analog signals to ensure the coordinated operation of the system. The signal connection includes: analog voltage feedback, digital communication protocol (I2C, SPI, RS-485), pulse width modulation (PWM). The control system is adjusted through the real-time data received from the power module. The adjustment parameters include output voltage, current, and frequency.

5. The multi-standard modular aircraft ground starting power supply according to claim 1, characterized in that: The power supply body also includes a bidirectional power converter, which realizes bidirectional energy flow between the power module and the charging module. When the power module is supplying power, the remaining energy can be used to charge the battery to ensure that the battery is always in the best charging state. When the system load fluctuates, the energy flow direction is flexibly switched according to demand to avoid excessive consumption of battery power.

6. The multi-standard modular aircraft ground starting power supply according to claim 1, characterized in that: The power supply body also includes a heat exchanger, and the heat generated by the power supply module is discharged through the heat exchanger. A heat conduction channel is arranged between each power supply module.

7. The multi-standard modular aircraft ground starting power supply according to claim 1, characterized in that: The power supply body also includes a fuse and a voltage stabilizer. The fuse protects the power supply module from being damaged by excessive current, and the voltage stabilizer protects the system from being impacted by overvoltage.

8. The multi-standard modular aircraft ground starting power supply according to claim 1, characterized in that: The charging module is used to charge the battery pack. The charging module draws power from the direct current output by the rectifier module and charges the battery pack by controlling the voltage and current.

Images