Generator control device, gas generator system and aircraft

Abstract

The utility model discloses a generator control device, a gas generator system and an aircraft, the generator control device comprises an automatic control unit, a sensing unit and a rectification unit, the generator is connected with a turbine of a turbojet engine through a main shaft, and the generator is connected with electric equipment. The automatic control unit is connected with an oil pump of the turbojet engine, electric equipment, the sensing unit and the rectifying unit, the sensing unit comprises a rotating speed sensor connected with a main shaft, the rectifying unit comprises a diode rectifier bridge and a buck-boost converter, the generator is connected with the diode rectifier bridge, and the diode rectifier bridge is connected with the buck-boost converter. And the buck-boost converter is connected with electric equipment. The power supply can stably output electric energy according to the requirements of electric equipment, ensures that the output voltage is stable, and meets the requirements of the electric equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to an aircraft technical field, concretely relates to a control device of generator, gas generator system and aircraft. BACKGROUND

[0002] The thrust of the exhaust of the turbojet engine acts on the turbine to drive the turbine to work, the turbine works coaxially with the generator, the rotor magnet of the generator and the stator coil act to generate electric energy. The existing generator connected with the turbojet engine cannot stably output electric energy according to the demand of the electric equipment, and at the same time, cannot guarantee that the electric equipment can be provided with stable direct current under any generator rotating speed and any direct current network pressure, and the voltage output by the generator can be unstable due to the change of rotating speed or load. SUMMARY

[0003] In order to solve at least one problem mentioned in the above background art, the utility model provides a control device of generator, gas generator system and aircraft, which can stably output electric energy according to the demand of the electric equipment, and at the same time, ensure that the output voltage is stable and meets the demand of the electric equipment.

[0004] The specific technical scheme provided by the utility model is as follows:

[0005] In the first aspect, a control device of generator is provided, which comprises an automatic control unit, a sensing unit and a rectifying unit, the generator is connected with the turbine of the turbojet engine through a main shaft, the generator is connected with the electric equipment, the automatic control unit is connected with the oil pump of the turbojet engine, the electric equipment, the sensing unit and the rectifying unit, the sensing unit comprises a rotating speed sensor connected with the main shaft, the rectifying unit comprises a diode rectifier bridge and a step-up and step-down converter, the generator is connected with the diode rectifier bridge, the diode rectifier bridge is connected with the step-up and step-down converter, and the step-up and step-down converter is connected with the electric equipment.

[0006] By the above technical scheme, the control device of the generator is provided with the automatic control unit, the sensing unit and the rectifying unit, the automatic control unit automatically collects the feedback signals of the voltage, the current, the power, the state and the like of the electric equipment and the rotating speed signal of the rotating speed sensor, then processes and analyzes the collected signals and formulates a control strategy, and sends the control signal to the oil pump to accurately adjust the oil supply of the turbojet engine, so as to adjust the rotating speed of the main shaft, stabilize the output power of the generator, and meet the demand of the electric equipment; meanwhile, the rectifying unit converts the three-phase alternating current output by the generator into direct current through the diode bridge, and flexibly adjusts the direct current voltage through the boost-buck converter, improves the stability and quality of the output power, ensures to provide stable and reliable direct current power for the electric equipment, and the automatic control unit can control the boost-buck converter through the feedback signals of the voltage, the current, the power, the state and the like of the electric equipment, further realizes the accurate adjustment of the output voltage, and ensures the stability of the output voltage and meets the demand of the electric equipment.

[0007] As a preferred solution of the above, the oil pump is an electric fuel pump, and the automatic control unit adjusts the oil supply of the turbojet engine by controlling the current of the oil pump.

[0008] As a preferred solution of the above, the automatic control unit controls the current of the oil pump by pulse width modulation or voltage regulation.

[0009] As a preferred solution of the above, the automatic control unit adjusts the oil supply of the turbojet engine by controlling the electronic regulating valve of the oil pump.

[0010] As a preferred solution of the above, the sensing unit further comprises a fuel flow sensor arranged at the outlet of the oil pump, and / or a temperature sensor arranged at the outlet of the turbojet.

[0011] As a preferred solution of the above, the diode bridge comprises a plurality of diodes and a capacitor filter, and the capacitor filter is connected between the diodes and the boost-buck converter.

[0012] As a preferred solution of the above, the automatic control unit adjusts the on or off of the switching device in the boost-buck converter by pulse width modulation control.

[0013] As a preferred solution of the above, the automatic control unit comprises an electronic control unit and / or a microprocessor control system.

[0014] As a preferred solution of the above, the automatic control unit further comprises a programmable logic controller.

[0015] In the second aspect, a gas generator system is provided, comprising the control device of the generator as above.

[0016] In a third aspect, there is provided an aircraft comprising a gas generator system as above. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Fig. 1 Fig. 1 is a structural schematic diagram of a gas generator system of the present application;

[0019] Fig. 2 Fig. 2 is a connection schematic diagram of a control device of a generator of the present application;

[0020] Fig. 3 Fig. 3 is a structural schematic diagram of a rectification unit of the present application. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0022] It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements can exist therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements can exist therebetween. The terms "vertical", "horizontal", "left", "right", "up", "down", "inner", "outer", "bottom", etc. used in the present specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] As described in the background, a turbojet engine, referred to as a turbojet engine, is a gas turbine engine that relies on the reaction force of high-speed gas emitted by the engine in a single flow passage. Its working principle is based on the Brayton cycle. Air enters the engine from the air intake, is compressed by the compressor, and then enters the combustion chamber to mix and burn with fuel, producing high-temperature and high-pressure gas to drive the turbine to rotate, rotating the compressor coaxial with the turbine. The gas flowing out of the turbine expands backward at high speed through the tail nozzle, while the compressor and turbine continue to rotate to maintain the working cycle, thereby generating thrust. The oil pump is an important part of the fuel system of the turbojet engine. Its main function is to pump fuel from the fuel tank and deliver it to the combustion chamber and other places where fuel is needed at a certain pressure and flow rate. The working performance of the oil pump directly affects whether the engine can obtain sufficient fuel supply to meet the needs of different working conditions.

[0024] Micro-combustion generator generally refers to micro-gas turbine generator, which is a small thermal power generation equipment. The micro-combustion generator is small in size, light in weight, and small in floor area, and can be flexibly installed in various space-limited places as the core equipment of distributed energy system, such as distributed energy station, data center, hospital, school, etc. It can also be used in vehicle-mounted, ship-mounted and other mobile power fields. The rotor of the micro-combustion generator is directly connected with the main shaft of the turbojet engine. The turbine rotates to drive the rotor of the micro-combustion generator to rotate. The rotor magnet interacts with the stator coil to generate electric energy, so that the micro-combustion generator generates electricity.

[0025] The existing generator connected with the turbojet engine cannot stably output electric energy according to the demand of the electric equipment, and cannot guarantee that the electric equipment can be provided with stable direct current at any generator speed and any direct current network pressure. The voltage output by the generator may be unstable due to changes in speed or load.

[0026] The utility model can stably output electric energy according to the demand of the electric equipment, and can ensure that the output voltage is stable and meets the demand of the electric equipment. The embodiments of the utility model are explained in detail below.

[0027] Embodiment one

[0028] As Figs. 1 to 3The utility model provides a control device of generator, including automatic control unit 1, sensing unit 2 and rectifier unit 3, generator 100 is connected with the turbine 201 of turbojet 200 through main shaft 203, generator 100 connects electric equipment 300, automatic control unit 1 is connected with the oil pump 204 of turbojet 200, electric equipment 300, sensing unit 2 and rectifier unit 3, sensing unit 2 includes the speed sensor 21 connected with main shaft 203, rectifier unit 3 includes diode rectifier bridge 31 and boost-buck converter 32, generator 100 connects diode rectifier bridge 31, diode rectifier bridge 31 connects boost-buck converter 32, boost-buck converter 32 connects electric equipment 300.

[0029] In an embodiment, the oil pump 204 is an electric fuel pump, such as a direct current motor driven oil pump 204. The automatic control unit 1 adjusts the oil supply of the turbine engine 200 by controlling the current of the oil pump 204. By controlling the current of the oil pump 204, the oil supply of the oil pump 204 can be indirectly controlled. The speed and output pressure of the oil pump 204 are directly related to the input current. Specifically, increasing the current can increase the speed of the oil pump 204, and increase the output pressure and fuel flow. Conversely, reducing the current can reduce the speed of the oil pump 204, and reduce the output pressure and fuel flow. By adjusting the current of the oil pump 204, high-precision oil supply control can be achieved. The automatic control unit 1 can quickly adjust the current of the oil pump 204 to adapt to changes in the load of the electric equipment. In addition, the automatic control unit 1 can dynamically adjust the oil supply according to the needs of the electric equipment, thereby reducing energy waste.

[0030] The automatic control unit 1 controls the current of the oil pump 204 by pulse width modulation or voltage regulation. Pulse width modulation (PWM) control is a method of modulating the width of a series of pulses to obtain the required waveform (including shape and amplitude). By adjusting the duty cycle of the pulse width modulation signal, the average current of the oil pump 204 can be controlled. Specifically, increasing the duty cycle increases the average current, which in turn increases the speed of the oil pump 204 and the oil supply. Conversely, reducing the duty cycle reduces the average current, which in turn reduces the speed of the oil pump 204 and the oil supply. The automatic control unit 1 controls the current of the oil pump 204 by pulse width modulation, which is precise, efficient, and fast in response. Voltage regulation is a method of adjusting the input voltage of the oil pump 204 to change the current. Specifically, increasing the voltage increases the current, which in turn increases the speed of the oil pump 204 and the oil supply. Conversely, reducing the voltage reduces the current, which in turn reduces the speed of the oil pump 204 and the oil supply. The automatic control unit 1 controls the current of the oil pump 204 by voltage regulation, which is simple and easy to implement.

[0031] In another embodiment, the automatic control unit 1 regulates the fuel supply to the turbojet engine 200 by controlling the electronic regulating valve (not shown) of the fuel pump 204. The electronic regulating valve of the fuel pump 204 is an electronically controlled valve installed on or within the fuel pump system, used to regulate the output fuel flow rate or pressure of the fuel pump 204. The automatic control unit 1 calculates the required fuel flow rate based on the collected signals and then sends a control signal to the electronic regulating valve of the fuel pump 204. The electronic regulating valve of the fuel pump 204 increases or decreases its opening according to the instructions of the automatic control unit 1, increasing or decreasing the fuel flow. Finally, the fuel pump 204 increases or decreases the output fuel pressure and flow rate according to the valve opening of the electronic regulating valve, thereby increasing or decreasing the amount of fuel entering the combustion chamber 202 of the turbojet engine 200 to meet the speed requirements of the generator 100.

[0032] The sensing unit 2 also includes a fuel flow sensor 22 located at the outlet of the fuel pump and / or a temperature sensor 23 located at the outlet of the turbine 201. The fuel flow sensor 22 monitors the actual fuel flow in real time and feeds the flow data back to the automatic control unit 1. The automatic control unit 1 further adjusts the current of the fuel pump 204 or the opening of the electronic regulating valve based on the feedback data to ensure that the fuel supply accurately matches the needs of the electrical equipment. The temperature sensor 23 can accurately measure the gas temperature at the turbine outlet in real time. The gas temperature at the turbine outlet is closely related to the combustion efficiency, power output, and thermal load of various components of the turbojet engine 200. The temperature sensor 23 transmits the measured temperature signal to the automatic control unit 1. Based on the received temperature information and data provided by other sensors (such as the speed sensor 21 and fuel flow sensor 22 mentioned above), the automatic control unit 1 evaluates and judges the overall operating status of the turbojet engine 200, thereby determining whether the fuel pump 204 needs to be adjusted and by how much.

[0033] like Fig. 3 As shown, the diode rectifier bridge 31 includes six diodes 311 and a capacitor filter 312. The six diodes 311 are connected to form a bridge structure, with each pair of diodes forming a group, corresponding to each phase of the three-phase AC power supply. This bridge structure is used to convert the three-phase AC power to DC power. The capacitor filter 312 is connected between the diodes 311 and the buck-boost converter 32. Placing the capacitor filter 312 at the output of the diode rectifier bridge 31 reduces ripple and achieves low-ripple voltage regulation. The buck-boost converter 32 consists of switching devices 321 (such as MOSFETs), inductors 322, and diodes 323. The switching devices 321 are connected to the automatic control unit 1. Additionally, a capacitor filter 324 can be placed at the output of the buck-boost converter 32. The capacitor filter 324 directly filters the DC voltage output by the buck-boost converter 32, providing a stable power supply for the subsequent load.

[0034] The automatic control unit 1 adjusts the conduction or non-conduction of the switching device 321 in the Buck-Boost converter 32 through pulse width modulation control. The Buck-Boost converter 32, also known as a buck-boost converter, is a DC-to-DC converter that can perform step-up and step-down conversion on the input DC voltage as needed, and can adjust the size and stability of the output voltage to meet the voltage and power requirements of different loads. In the Buck-Boost converter 32, the topology of the circuit is changed by the conduction and non-conduction of the switching device 321, thereby realizing the step-up and step-down conversion of the voltage, and the pulse width modulation control signal can accurately control the conduction and non-conduction time of the switching device 321, thereby controlling the energy storage and release process, and further realizing the accurate regulation of the output voltage. By changing the duty cycle of the pulse width modulation control signal (i.e. the ratio of the switching tube conduction time to the entire switching period), the charging and discharging time of the inductor in the Buck-Boost converter 32 can be changed, thereby controlling the size of the output voltage. When the duty cycle increases, the inductor charging time becomes relatively longer, and the output voltage rises; on the contrary, when the duty cycle decreases, the output voltage decreases. In practical applications, the load and input voltage of the Buck-Boost converter 32 may change, which will affect the stability of the output voltage. The automatic control unit 1 connects the switching device 321 in the Buck-Boost converter 32, and the automatic control unit 1 can adjust the duty cycle in real time by collecting the voltage, current, power, state and other feedback signals of the electrical equipment, so that the output voltage is kept near the set value, thereby improving the stability and anti-interference ability of the Buck-Boost converter 32, further realizing the accurate regulation of the output voltage, ensuring the stability of the output voltage and meeting the demand of the electrical equipment.

[0035] The automatic control unit 1 comprises an electronic control unit (not shown) and / or a microprocessor control system (not shown). The electronic control unit is also called ECU (Electronic Control Unit), which is essentially a microcontroller integrating microprocessor (CPU), memory (ROM, RAM), input / output interface (I / O), analog-to-digital converter (ADC) and other auxiliary circuits, etc. By running the pre-written program, the signals input by various sensors are processed and analyzed, and then control instructions are issued to realize accurate control and management of the equipment. The microprocessor control system is a system that uses a microprocessor as the core, combines relevant hardware and software, and monitors, controls and adjusts various physical quantities and working processes. In the present utility model, the electronic control unit and the microprocessor control system can be used together or separately to control the stable output of electric energy of the generator according to the feedback signal to meet the demand of the electric equipment. The automatic control unit 1 can also comprise a programmable logic controller (not shown), which is a programmable logic controller (PLC for short). It is a digital operation electronic system specially designed for application in industrial environments. The programmable logic controller can control the logic of the start, stop, grid connection and column of the generator, and can also monitor the operating parameters of the generator in real time, such as voltage, current, temperature, etc. According to the preset logic and conditions, it can perform operations such as alarm and protection. The programmable logic controller can communicate with the electronic control unit and / or the microprocessor control system to realize remote control and monitoring of the generator.

[0036] The control device of the generator can be used for the micro-combustion generator, and the control device of the micro-combustion generator and the micro-combustion generator are in a distributed power generation system, specifically in a direct-current microgrid, and the direct-current microgrid can independently operate or be connected with a main power grid to provide power for loads in a specific region. For example, when the output power of the micro-combustion generator needs to be maintained at 30Kw, the rotating speed of the micro-combustion generator needs to be maintained at about 5w. First, the automatic control unit 1 automatically collects the voltage, current, power, state and other feedback signals of the electrical equipment and the rotating speed signal of the rotating speed sensor, and then performs demand calculation of the electrical equipment and rotating speed analysis of the micro-combustion generator according to the collected signals, and formulates a control strategy: when the power demand of the electrical equipment increases, the load of the micro-combustion generator increases, and the rotating speed may decrease, the automatic control unit 1 detects the decrease of the rotating speed and judges that the oil supply needs to be increased to maintain the stability of the rotating speed; when the power demand of the electrical equipment decreases, the load of the micro-combustion generator decreases, and the rotating speed may increase, the automatic control unit 1 detects the increase of the rotating speed and judges that the oil supply needs to be reduced to maintain the stability of the rotating speed. Finally, the automatic control unit 1 adjusts the oil supply in real time and dynamically according to the preset rotating speed target value (such as the rated rotating speed 5w) through the closed-loop control loop, so as to ensure the stability of the rotating speed of the micro-combustion generator. The PID control algorithm can be built in the automatic control unit 1, and the automatic control unit 1 can accurately adjust the oil supply according to the load change of the electrical equipment through the PID control algorithm, avoid the rotating speed fluctuation, make the generator stably output electric energy, and meet the demand of the electrical equipment.

[0037] In addition, the rectifier unit 3 first converts the three-phase alternating current output by the micro-combustion generator into direct current through the diode rectifier bridge 31, and then adjusts the direct current voltage flexibly through the boost-buck converter 32, improves the stability and quality of the output electric energy, ensures to provide stable and reliable direct current power for the electrical equipment, and the automatic control unit 1 can control the boost-buck converter 32 through the voltage, current, power, state and other feedback signals of the electrical equipment, further realizes accurate adjustment of the output voltage, the output voltage is direct current in the range of 355.2-403.2V, and the stability of the output voltage is ensured and the demand of the electrical equipment is met.

[0038] The control device of the generator is provided with an automatic control unit 1, a sensing unit 2 and a rectifying unit 3, the automatic control unit 1 automatically collects the voltage, current, power, state and other feedback signals and the rotating speed signal of the rotating speed sensor of the electric equipment first, then the automatic control unit 1 processes and analyzes the collected signals and formulates a control strategy, and sends a control signal to the oil pump, so as to accurately adjust the oil supply of the turbojet engine 200, thereby adjusting the rotating speed of the main shaft, making the generator 100 stably output electric energy to meet the demand of the electric equipment; meanwhile, the rectifying unit 3 first converts the three-phase alternating current output by the generator 100 into direct current through a diode rectifier bridge 31, and then flexibly adjusts the direct current voltage through a boost-buck converter 32, improves the stability and quality of the output electric energy, ensures to provide stable and reliable direct current power for the electric equipment, and the automatic control unit 1 can control the boost-buck converter 32 through the voltage, current, power, state and other feedback signals of the electric equipment, further realizes accurate adjustment of the output voltage, and ensures that the output voltage is stable and meets the demand of the electric equipment.

[0039] Embodiment two

[0040] The utility model provides a kind of gas generator system, including the control device of generator of as embodiment one, gas generator 100 and turbojet engine 200, gas generator 100 is the generator 100 in the control device of generator of as embodiment one.

[0041] Embodiment three

[0042] The utility model provides a kind of aircraft, including the gas generator system of as embodiment two.

[0043] Although the preferred embodiments in the embodiments of the utility model have been described, those skilled in the art can make additional changes and modifications to these embodiments once the basic creative concept is known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the utility model.

[0044] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalent technologies, the utility model also intends to include these modifications and variations.

Claims

1. A control device for a generator, characterized in that, The system includes an automatic control unit, a sensing unit, and a rectifier unit. The generator is connected to the turbine of the turbojet engine via a main shaft. The generator is connected to electrical equipment. The automatic control unit is connected to the oil pump of the turbojet engine, the electrical equipment, the sensing unit, and the rectifier unit. The sensing unit includes a speed sensor connected to the main shaft. The rectifier unit includes a diode rectifier bridge and a buck-boost converter. The generator is connected to the diode rectifier bridge, the diode rectifier bridge is connected to the buck-boost converter, and the buck-boost converter is connected to the electrical equipment.

2. The generator control device according to claim 1, characterized in that, The fuel pump is an electric fuel pump, and the automatic control unit regulates the fuel supply of the turbine engine by controlling the current of the fuel pump.

3. The generator control device according to claim 2, characterized in that, The automatic control unit controls the current of the oil pump through pulse width modulation or voltage regulation.

4. The generator control device according to claim 1, characterized in that, The automatic control unit regulates the fuel supply of the turbine engine by controlling the electronic regulating valve of the oil pump.

5. The control device for the generator according to claim 1, characterized in that, The sensing unit also includes a fuel flow sensor disposed at the outlet of the oil pump, and / or a temperature sensor disposed at the outlet of the turbine.

6. The control device for the generator according to claim 1, characterized in that, The diode rectifier bridge includes multiple diodes and a capacitor filter, with the capacitor filter connected between the diodes and the buck-boost converter.

7. The control device for the generator according to claim 1, characterized in that, The automatic control unit uses pulse width modulation control to regulate the on or off of the switching devices in the buck-boost converter.

8. The control device for the generator according to claim 1, characterized in that, The automatic control unit includes a programmable logic controller.

9. A gas generator system, characterized in that, Includes the control device for the generator as described in any one of claims 1-8.

10. An aircraft, characterized in that, Includes the gas generator system as described in claim 9.

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