Front wind power generation kinetic energy synergistic system of new energy automobile

Abstract

The invention relates to the technical field of new energy automobile power generation, and discloses a new energy automobile front wind power generation electric energy efficiency increasing system which comprises a hardware part and a software part, and the hardware part comprises an adjustable air guide duct installed in an automobile forecabin and a generator set located in the adjustable air guide duct; the generator set comprises a wind turbine, a gearbox, a doubly-fed asynchronous motor, a controller and a rectifier. The adjustable air guide duct is installed in the front cabin of the automobile, the inlet of the adjustable air guide duct is located on the windward side of the automobile, and the generator set is installed in the adjustable air guide duct; the windward area of the automobile can be reduced through the adjustable air guide duct, so that the wind resistance of the automobile is reduced, and the energy consumption is reduced; the airflow is compressed and accelerated to drive the wind turbine to rotate, so that electric energy recovery is realized; and the rotating speed and the power of the wind turbine are adjusted through the adjusting control module at different speeds, so that the wind turbine is at the optimal output power, and the maximum wind energy conversion efficiency is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle power generation, and in particular to a front wind power generation energy efficiency enhancement system for a new energy vehicle. Background Art

[0002] Compared with internal combustion engine vehicles, new energy vehicles have outstanding advantages, especially in environmental protection and energy saving, making the development and research of electric vehicles the mainstream of green vehicle development in various countries. The energy used by new energy vehicles is usually batteries; but batteries have the defects of limited energy storage and short driving range; and when the car is driving normally, the convection between the car and the air generates wind energy. As long as the car maintains normal driving state, the car will generate wind energy; therefore, on-board wind power generation as a green and renewable energy solution has attracted much attention.

[0003] A Chinese patent discloses a car wind power generation device (authorization announcement number CN215949735U). The patented technology is used in conjunction with a car frame, a first power generation fan, a second power generation fan, an air intake grille, a fish fin hole, an exhaust tail wing and an inclined air intake plate. When the vehicle is driving, the wind from the front side enters the car frame through the air intake grille, and the first power generation fan rotates due to the wind force. The wind force generated by the rotation of the first power generation fan can also drive the two second power generation fans on the rear side to rotate. Finally, the wind entering the car frame will be quickly discharged through the exhaust tail wing, which solves the problem that a large amount of wind will be discharged out of the car through the front air intake grille when the existing car is driving, and there is no device for recycling wind inside the car, so the problem of being unable to recycle wind as an energy source, but it cannot control the speed of the wind turbine at different speeds, resulting in low power generation efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a front wind power generation energy efficiency enhancement system for new energy vehicles to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A front wind power generation energy efficiency enhancement system for a new energy vehicle comprises a hardware part and a software part, wherein the hardware part comprises an adjustable air duct installed in the front cabin of the vehicle, and a generator set located inside the adjustable air duct, and a wind speed sensor and a temperature sensor are installed on the inner wall of the adjustable air duct; the wind speed sensor is used to monitor the air flow speed in the adjustable air duct, and the temperature sensor is used to monitor the air flow temperature in the adjustable air duct; The generator set includes a wind turbine, a gearbox, a doubly-fed asynchronous motor, a controller and a rectifier: the wind turbine rotates under the action of airflow, and drives the gearbox and the doubly-fed asynchronous motor to rotate, the speed of the doubly-fed asynchronous motor is adjusted by the gearbox, and power generation is achieved through the rotation of the doubly-fed asynchronous motor; the voltage amplitude and frequency are adjusted by the controller, so that the doubly-fed asynchronous motor transmits active power with constant voltage and frequency; the positive and negative alternating current is converted into direct current with constant direction by the rectifier, and the electric energy is stored in the battery; The inlet of the adjustable air guide duct is located on the windward side of the car, and is used to guide the airflow when the car is driving; the airflow is compressed after entering the adjustable air guide duct from the inlet, so that the wind speed increases; and the airflow is discharged from the outlet and guided to the chassis of the car to dissipate heat from the battery; An area adjustment mechanism and an angle adjustment mechanism are installed at the entrance of the adjustable air guide duct; the area adjustment mechanism is used to control the size of the entrance area of ​​the adjustable air guide duct; the angle adjustment mechanism is used to control the size of the entrance angle of the adjustable air guide duct.

[0006] As a further solution of the present invention: the wind turbine is a lift-drag combined vertical axis wind turbine, including four lift-type blades and two drag-type blades.

[0007] As a further solution of the present invention: the attack angle and installation angle of the lift-type blade are both 8-11°, the attack angle and installation angle of the drag-type blade are both 6-9°, and the tip speed ratios of the lift-type blade and the drag-type blade are both 0.32-0.36.

[0008] As a further solution of the present invention: the software part includes an adjustment control module, a fault detection module and a display module; The fault detection module is used to collect, process and analyze the temperature, vibration and speed data of the generator set, identify the type, location and severity of the fault, and provide guidance for subsequent maintenance work to ensure the safe and stable operation of the system; the display module is used to display the operating status and parameters of the generator set.

[0009] As a further solution of the present invention: the fault detection and self-diagnosis methods include a rule-based expert system, a model-based fault diagnosis method and a data-driven machine learning algorithm; wherein the rule-based expert system includes a knowledge base, a database, an inference engine and an interpreter, and the knowledge base consists of a fault mode table, a fault cause table and a diagnosis conclusion table; the model-based fault diagnosis method includes a residual analysis method, a parameter estimation method and a state estimation method; the data-driven machine learning algorithm includes a linear regression algorithm, a logistic regression algorithm, a support vector machine algorithm and a decision tree algorithm.

[0010] As a further solution of the present invention: the regulation control module includes a start control unit, a maximum wind energy control unit, a constant speed control unit and a constant power control unit.

[0011] As a further solution of the present invention: the starting control unit is used to disconnect the double-fed asynchronous motor and the battery when the wind speed is less than the cut-in wind speed of the wind turbine; The maximum wind energy control unit is used to adjust the speed of the doubly-fed asynchronous motor through the gearbox when the doubly-fed asynchronous motor rotates below the rated speed so that the doubly-fed asynchronous motor runs at the optimal output power; The constant speed control unit is used to control the inlet area and angle of the adjustable air guide duct through the area adjustment mechanism and the angle adjustment mechanism when the speed of the double-fed asynchronous motor reaches the rated speed but the output power of the wind turbine does not reach the rated power, so that the speed of the wind turbine is limited to the maximum allowable value to achieve constant speed operation; The constant power control unit is used to make the wind turbine run at a constant speed and power through an area adjustment mechanism and an angle adjustment mechanism when the output power of the wind turbine reaches the rated power.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention installs an adjustable air duct in the front cabin of the car, and the entrance of the adjustable air duct is located on the windward side of the car, and a generator set is installed inside the adjustable air duct; the adjustable air duct can reduce the windward area of ​​the car, thereby reducing the wind resistance of the car and reducing energy consumption; and the airflow is compressed and accelerated to drive the wind turbine to rotate, thereby realizing electric energy recovery; and the speed and power of the wind turbine are adjusted by adjusting the control module at different speeds to make it at the optimal output power and realize the maximum wind energy conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of the wind turbine in the front wind power generation energy efficiency enhancement system of new energy vehicles. DETAILED DESCRIPTION

[0014] In an embodiment of the present invention, a front wind power generation energy efficiency enhancement system for a new energy vehicle comprises a hardware part and a software part. The hardware part comprises an adjustable air duct installed in the front cabin of the vehicle, and a generator set located inside the adjustable air duct. A wind speed sensor and a temperature sensor are installed on the inner wall of the adjustable air duct; the wind speed sensor is used to monitor the air flow speed in the adjustable air duct, and the temperature sensor is used to monitor the air flow temperature in the adjustable air duct; The generator set includes a wind turbine, a gearbox, a doubly-fed asynchronous motor, a controller and a rectifier: the wind turbine rotates under the action of the airflow, and drives the gearbox and the doubly-fed asynchronous motor to rotate. The speed of the doubly-fed asynchronous motor is adjusted through the gearbox, and power generation is achieved through the rotation of the doubly-fed asynchronous motor; the voltage amplitude and frequency are adjusted through the controller, so that the doubly-fed asynchronous motor transmits active power with constant voltage and frequency; the positive and negative alternating current is converted into direct current with constant direction through the rectifier, and the electric energy is stored in the battery, thereby realizing the conversion of kinetic energy into electric energy during the driving process of new energy vehicles; The inlet of the adjustable air duct is located on the windward side of the car, and is used to guide the airflow when the car is driving. The adjustable air duct can reduce the windward area of ​​the car, thereby reducing the wind resistance of the car and reducing energy consumption. The airflow is compressed after entering the adjustable air duct from the inlet, so that the wind speed increases, thereby increasing the rotation speed of the wind turbine; and the airflow is discharged from the outlet and guided to the chassis of the car to dissipate heat from the battery. An area adjustment mechanism and an angle adjustment mechanism are installed at the entrance of the adjustable air duct; the area adjustment mechanism is used to control the entrance area of ​​the adjustable air duct; the angle adjustment mechanism is used to control the entrance angle of the adjustable air duct; when the entrance of the adjustable air duct is controlled to the minimum by the area adjustment mechanism, the entrance of the adjustable air duct is closed, and the windward area of ​​the car is the same as that of an ordinary new energy vehicle.

[0015] Preferably, the wind turbine is a lift-drag combined vertical axis wind turbine, such as Figure 1 As shown, it includes four lift-type blades and two drag-type blades.

[0016] Preferably, the angle of attack and the installation angle of the lift-type blade are both 8-11°, the angle of attack and the installation angle of the drag-type blade are both 6-9°, and the tip speed ratios of the lift-type blade and the drag-type blade are both 0.32-0.36; wherein, the angle of attack is the angle formed by the chord of the airfoil blade and the relative wind speed, and the installation angle is the angle formed by the mounting plane of the airfoil blade and the chord of the airfoil blade; the tip speed ratio is the ratio of the linear velocity of the blade tip to the wind speed; so that it has better starting performance, thereby maximizing the energy captured from the wind; at the same time, the wind turbine has better dynamic balance performance and lower noise when running at high speed.

[0017] Preferably, the software part includes an adjustment control module, a fault detection module and a display module; The fault detection module is used to collect, process and analyze the temperature, vibration and speed data of the generator set, identify the type, location and severity of the fault, and provide guidance for subsequent maintenance work to ensure the safe and stable operation of the system; the display module is used to display the operating status and parameters of the generator set, such as wind turbine speed, power generation, wind energy capture efficiency, etc.

[0018] Preferably, the fault detection and self-diagnosis methods include rule-based expert systems, model-based fault diagnosis methods and data-driven machine learning algorithms; wherein the rule-based expert system includes a knowledge base, a database, an inference engine and an interpreter, and the knowledge base consists of a fault mode table, a fault cause table and a diagnosis conclusion table; the model-based fault diagnosis method includes a residual analysis method, a parameter estimation method and a state estimation method; the data-driven machine learning algorithm includes a linear regression algorithm, a logistic regression algorithm, a support vector machine algorithm and a decision tree algorithm.

[0019] Preferably, the regulation control module includes a start control unit, a maximum wind energy control unit, a constant speed control unit and a constant power control unit.

[0020] Preferably, the starting control unit is used to disconnect the double-fed asynchronous motor from the battery when the wind speed is less than the cut-in wind speed of the wind turbine, so that the generator set does not generate electricity when the car just starts. The maximum wind energy control unit is used to adjust the speed of the doubly-fed asynchronous motor through the gearbox when the doubly-fed asynchronous motor rotates below the rated speed so that it runs at the optimal output power and achieves the maximum wind energy conversion efficiency; The constant speed control unit is used to control the inlet area and angle of the adjustable air guide duct through the area adjustment mechanism and the angle adjustment mechanism when the speed of the double-fed asynchronous motor reaches the rated speed but the output power of the wind turbine does not reach the rated power, so that the speed of the wind turbine is limited to the maximum allowable value to achieve constant speed operation; The constant power control unit is used to make the wind turbine operate at a constant speed and power through the area adjustment mechanism and the angle adjustment mechanism when the wind turbine output power reaches the rated power; thereby achieving the best rotation speed at different wind speeds and a higher wind energy capture efficiency.

[0021] In order to better illustrate the technical effects of the present invention, the following embodiments are described: The electric energy efficiency enhancement system of the present invention is selected as embodiments 1 to 3 respectively; wherein, In Example 1, the attack angle and installation angle of the lift-type blade are both 8°, the attack angle and installation angle of the drag-type blade are both 6°, and the tip speed ratios of the lift-type blade and the drag-type blade are both 0.32; In Example 2, the attack angle and installation angle of the lift-type blade are both 9°, the attack angle and installation angle of the drag-type blade are both 8°, and the tip speed ratios of the lift-type blade and the drag-type blade are both 0.34; In Example 3, the attack angle and installation angle of the lift-type blade are both 11°, the attack angle and installation angle of the drag-type blade are both 9°, and the tip speed ratios of the lift-type blade and the drag-type blade are both 0.39; Embodiments 1 to 3 of the present invention were respectively installed in the front cabin of a simulated car as embodiment 1 to 3 groups, and the control group was a simulated ordinary new energy vehicle, and wind tunnel experiments were carried out under the same conditions; the wind speeds of the wind tunnel were 10, 15, 20 and 30 m / s, respectively, and the drag, drag coefficient, lift and lift coefficient, as well as the wind energy utilization coefficient (unit: 100%) and the recovery power (unit: W) of the four groups were measured and recorded in the following Table 1.

[0022] Table 1 Analysis of wind energy utilization coefficient Project Name resistance Drag coefficient Lift Lift coefficient Wind energy utilization factor Recovering power Example 1 Group 199.63 0.586 67.31 0.238 14.83% 438.7 Example 2 Group 199.41 0.584 67.34 0.239 15.01% 440.2 Example 3 Group 199.58 0.591 67.29 0.240 15.02% 440.7 Control group 206.75 0.603 79.65 0.251 - - It can be concluded from Table 1 above that: the drag and drag coefficient in Examples 1 to 3 are significantly smaller than those in the control group; the lift and lift coefficient in Examples 1 to 3 are significantly greater than those in the control group; and the wind energy utilization coefficient in Examples 1 to 3 is higher; and it can be further concluded that: the wind power generation energy efficiency enhancement system in the present invention can significantly reduce the wind resistance of new energy vehicles, and can recover electrical energy, and the wind energy capture efficiency is higher.

[0023] What has been described above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The front wind power generation energy efficiency enhancement system for new energy vehicles, including hardware and software parts, is characterized in that: The hardware part includes an adjustable air duct installed in the front cabin of the car, and a generator set located inside the adjustable air duct. A wind speed sensor and a temperature sensor are installed on the inner wall of the adjustable air duct; the wind speed sensor is used to monitor the air flow speed in the adjustable air duct, and the temperature sensor is used to monitor the air flow temperature in the adjustable air duct; The generator set includes a wind turbine, a gearbox, a doubly-fed asynchronous motor, a controller and a rectifier: the wind turbine rotates under the action of airflow, and drives the gearbox and the doubly-fed asynchronous motor to rotate, the speed of the doubly-fed asynchronous motor is adjusted by the gearbox, and power generation is achieved through the rotation of the doubly-fed asynchronous motor; the voltage amplitude and frequency are adjusted by the controller, so that the doubly-fed asynchronous motor transmits active power with constant voltage and frequency; the positive and negative alternating current is converted into direct current with constant direction by the rectifier, and the electric energy is stored in the battery; The inlet of the adjustable air guide duct is located on the windward side of the car, and is used to guide the airflow when the car is driving; the airflow is compressed after entering the adjustable air guide duct from the inlet, so that the wind speed increases; and the airflow is discharged from the outlet and guided to the chassis of the car to dissipate heat from the battery; An area adjustment mechanism and an angle adjustment mechanism are installed at the entrance of the adjustable air guide duct; the area adjustment mechanism is used to control the size of the entrance area of ​​the adjustable air guide duct; the angle adjustment mechanism is used to control the size of the entrance angle of the adjustable air guide duct.

2. The new energy vehicle front wind power generation energy efficiency enhancement system according to claim 1 is characterized in that: The wind turbine is a lift-drag combined vertical axis wind turbine, comprising four lift-type blades and two drag-type blades.

3. The new energy vehicle front wind power generation energy efficiency enhancement system according to claim 1 is characterized in that: The attack angle and installation angle of the lift-type blade are both 8-11°, the attack angle and installation angle of the drag-type blade are both 6-9°, and the tip speed ratios of the lift-type blade and the drag-type blade are both 0.32-0.

36.

4. The new energy vehicle front wind power generation energy efficiency enhancement system according to claim 1 is characterized in that: The software part includes an adjustment control module, a fault detection module and a display module; The fault detection module is used to collect, process and analyze the temperature, vibration and speed data of the generator set, identify the type, location and severity of the fault, and provide guidance for subsequent maintenance work to ensure the safe and stable operation of the system; the display module is used to display the operating status and parameters of the generator set.

5. The new energy vehicle front wind power generation energy efficiency enhancement system according to claim 1 is characterized in that: Fault detection and self-diagnosis methods include rule-based expert systems, model-based fault diagnosis methods and data-driven machine learning algorithms; among them, the rule-based expert system includes a knowledge base, a database, an inference engine and an interpreter, and the knowledge base consists of a fault mode table, a fault cause table and a diagnostic conclusion table; the model-based fault diagnosis method includes a residual analysis method, a parameter estimation method and a state estimation method; the data-driven machine learning algorithm includes a linear regression algorithm, a logistic regression algorithm, a support vector machine algorithm and a decision tree algorithm.

6. The new energy vehicle front wind power generation energy efficiency enhancement system according to claim 1 is characterized in that: The regulation control module includes a start control unit, a maximum wind energy control unit, a constant speed control unit and a constant power control unit.

7. The new energy vehicle front wind power generation energy efficiency enhancement system according to claim 6 is characterized in that: The start control unit is used to disconnect the double-fed asynchronous motor and the battery when the wind speed is less than the cut-in wind speed of the wind turbine; The maximum wind energy control unit is used to adjust the speed of the doubly-fed asynchronous motor through the gearbox when the doubly-fed asynchronous motor rotates below the rated speed so that the doubly-fed asynchronous motor runs at the optimal output power; The constant speed control unit is used to control the inlet area and angle of the adjustable air guide duct through the area adjustment mechanism and the angle adjustment mechanism when the speed of the double-fed asynchronous motor reaches the rated speed but the output power of the wind turbine does not reach the rated power, so that the speed of the wind turbine is limited to the maximum allowable value to achieve constant speed operation; The constant power control unit is used to make the wind turbine run at a constant speed and power through an area adjustment mechanism and an angle adjustment mechanism when the output power of the wind turbine reaches the rated power.

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