Wind driven generator system of new energy electric vehicle and control method

Abstract

The invention relates to the technical field of wind driven generators, in particular to a new energy electric vehicle wind driven generator system and a control method. The ventilation protection net covers the outer side of the air inlet inclined opening; the wind driven generator is mounted behind the air inlet bevel; the generator fan blades are connected to a rotor of the wind driven generator; the rectifying and voltage stabilizing circuit is connected to the output end of the wind driven generator; the vehicle-mounted storage battery is connected with the rectifying and voltage-stabilizing circuit; wind energy is utilized to generate electricity in real time in the low-speed or high-speed running process of the vehicle and is supplemented to the vehicle-mounted battery, so that dependence on external charging facilities is effectively reduced, meanwhile, the double-battery-pack design is matched with the intelligent switching circuit, electric power seamless connection is achieved, the charging strategy can be automatically optimized according to the battery state, and the charging efficiency is improved. And when the electricity of the storage battery is lower than 20%-30%, the battery pack can be automatically switched to achieve infinite endurance, so that the problem of endurance anxiety of a user is fundamentally relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbines, and in particular to a wind turbine system for a new energy electric vehicle and a control method thereof. Background Art

[0002] In recent years, with the rapid development of new energy electric vehicles around the world, low, medium and high-speed new energy electric vehicles have emerged continuously. Among them, pure electric and hybrid electric vehicles have certain problems and defects in terms of endurance and energy saving, etc., but they are inconvenient to charge.

[0003] Improving the range of new energy electric vehicles mainly relies on increasing battery capacity or optimizing the efficiency of the electric drive system. Some models try to use solar panels or brake energy recovery systems to improve range. This method relies too much on fixed charging facilities, which makes charging inconvenient during long-distance driving. Especially in remote areas where charging piles are insufficient, the range anxiety problem is particularly prominent. In addition, solar charging is limited by weather and installation area, and the energy replenishment efficiency is low. Braking energy recovery only works when the vehicle decelerates and cannot provide continuous energy replenishment during constant speed or acceleration. These defects seriously restrict the practicality and user experience of electric vehicles.

[0004] Therefore, in response to the above problems, the present invention proposes a new energy electric vehicle wind turbine generator system and control method, which drives the generator through the natural wind generated when the vehicle is driving, converts wind energy into electrical energy and replenishes it to the vehicle battery in real time, thereby significantly improving the vehicle's cruising range and achieving continuous self-powered function. Summary of the Invention

[0005] In order to overcome the problems of limited cruising range and single energy replenishment method of electric vehicles, the present invention proposes a new energy electric vehicle wind turbine generator system and control method.

[0006] The technical solution of the present invention is: a new energy electric vehicle wind turbine generator system, comprising:

[0007] The oblique air inlet is set at the front end of the electric vehicle to guide and gather the natural wind generated during driving;

[0008] The ventilation screen covers the outside of the air inlet, and is used to filter debris and protect internal components;

[0009] The wind turbine is installed behind the wind inlet and is used to convert wind energy into electrical energy;

[0010] Generator blades, connected to the rotor of the wind turbine, are used to be driven by the wind and drive the permanent magnet rotor to rotate and generate electricity;

[0011] A rectifier and voltage stabilizing circuit is connected to the output terminal of the wind turbine generator and is used to convert AC power into DC power and stabilize the voltage;

[0012] The vehicle-mounted battery is connected to the rectifier and voltage-stabilizing circuit and is used to store the electrical energy generated by the wind turbine.

[0013] Preferably, the wind turbine includes a permanent magnet rotor, a plastic-steel stator and a high-strength coil, wherein the permanent magnet rotor is coaxially connected to the generator blades, and is used to drive the permanent magnet rotor to cut the magnetic flux lines of the plastic-steel stator when the blades are driven to rotate by wind, thereby generating an induced current through the high-strength coil to complete the conversion of wind energy into electrical energy.

[0014] Preferably, the system is integrated with a vehicle speed-wind force matching control module for real-time monitoring of the electric vehicle's driving speed and dynamically adjusting the power generation parameters according to the vehicle speed. When the vehicle speed reaches 20 km / h, the system determines that the wind force is equivalent to level 4 wind and starts the basic power generation mode. When the vehicle speed increases to 100 km / h, it determines that the wind force reaches level 10 to 12 wind and switches to the high-efficiency power generation mode. By adaptively adjusting the electromagnetic load of the generator and the conductivity of the rectifier circuit, it matches the power generation power and battery charging requirements at different vehicle speeds.

[0015] Preferably, the rectification and voltage stabilization circuit consists of a three-phase full-bridge rectifier, an LC filter module and a Buck-Boost regulator, which is used to convert the three-phase AC power output by the wind turbine into pulsating DC power, smooth the waveform through the LC filter module, and then dynamically adjust and output the voltage to the rated charging voltage range of the vehicle battery through the Buck-Boost regulator, wherein the feedback end of the Buck-Boost regulator is connected to the BMS system of the battery, and is used to adjust the charging current according to the real-time charge state of the battery.

[0016] Preferably, the electric vehicle is equipped with two energy storage units, a main battery and a backup battery, and is provided with an automatic switching circuit based on a relay group, which is used to monitor the remaining power of the main battery and cut off the power supply of the main circuit when the power drops to a threshold of 20%-30%, and at the same time close the backup circuit to connect the backup battery to the drive system. At this time, the output power of the wind turbine is preferentially charged to the low-power battery through the rectifier and voltage stabilization circuit until its power is restored to more than 50% and switches to the balanced charging mode.

[0017] Preferably, the cross-section of the oblique air inlet is a tapered streamline structure, and the inclination angle of the windward surface is 15°-25°, which is used to accelerate the airflow and reduce turbulence through the Venturi effect when the vehicle is driving, so that the wind speed entering the ventilation guard net is increased by 20%-30%. At the same time, the inner wall of the oblique opening is covered with a sound-absorbing honeycomb layer to attenuate wind noise. The distance between the oblique air inlet and the wind turbine is 1.2-1.5 times the diameter of the fan blade.

[0018] Preferably, the ventilation guard net is composed of an outer layer of stainless steel perforated mesh and an inner layer of nylon filter mesh, which is used to prevent foreign matter with a particle size greater than 5 mm from entering the wind turbine. The aperture of the stainless steel perforated mesh is 8 mm and the opening rate is 60%-70%. The nylon filter mesh is detachable and fixed by a magnetic frame. Rubber sealing strips are embedded around the ventilation guard net.

[0019] Preferably, a control method for a new energy electric vehicle wind turbine generator system comprises the following steps:

[0020] During S1, the wind turbine captures natural wind through the inclined air inlet and ventilation screen, driving the generator blades to rotate, which in turn drives the permanent magnet rotor to cut the magnetic flux lines within the plastic-steel stator, causing the high-strength coil to generate three-phase AC power. Simultaneously, the vehicle speed-wind power matching control module monitors the vehicle speed in real time and dynamically adjusts the generator's electromagnetic load based on the speed. When the vehicle speed reaches 20 km / h, the system automatically starts the power generation mode. When the vehicle speed exceeds 100 km / h, it switches to high-speed power generation mode to maximize energy capture.

[0021] In step S2, the three-phase AC power output by the wind turbine is input into the rectifier and voltage regulator circuit. It is first converted into pulsating DC power by a three-phase full-bridge rectifier, and then the waveform is smoothed by an LC filter module. The Buck-Boost regulator then dynamically adjusts the output voltage to a range of 48V-72V based on the real-time voltage requirements of the vehicle battery. Simultaneously, the rectifier and voltage regulator circuit communicates with the battery management system to obtain battery state of charge and temperature data, and adjusts the charging current based on this data.

[0022] In S3, the system continuously monitors the remaining charge of the main battery. When the charge drops to a preset threshold, an automatic switching circuit immediately disconnects the main battery's power supply circuit and closes the backup battery's access circuit. At the same time, the electricity generated by the wind turbine is preferentially used to charge the low-charge battery through the rectifier and voltage-stabilizing circuit until its charge is restored to above 50%. If the vehicle continues to drive and the wind power generation is sufficient, the system automatically enters the dual-battery balanced charging mode, allocating the charging current through a priority algorithm to extend the overall driving range.

[0023] Preferably, the set threshold is 20%-30% of the battery capacity. The threshold range is dynamically adjusted by the battery health status monitoring module of the battery management system. When it is detected that the battery cycle number exceeds 500 times or the capacity decays to less than 80% of the initial value, the system automatically increases the switching threshold to 25%-35%. At the same time, the threshold is associated with the vehicle driving environment and is automatically relaxed by 5% in low or high temperature environments. All threshold parameters are displayed in real time through the on-board display and support manual fine-tuning of ±3% by the driver.

[0024] Preferably, the output power of the wind turbine is nonlinearly positively correlated with the vehicle speed. Specifically, when the vehicle speed is in the range of 20-40 km / h, the generated power increases according to a quadratic function curve as the vehicle speed increases. When the vehicle speed exceeds 40 km / h, it turns to linear growth. The system monitors the speed in real time through a Hall sensor installed at the generator shaft end and feeds back to the vehicle speed-wind matching control module. The module dynamically adjusts the excitation current of the generator according to a preset speed-power mapping table to optimize the output. At the same time, the Buck-Boost regulator of the rectifier and voltage stabilization circuit will automatically switch the working mode according to the change of generated power. Pulse width modulation is used at low power, and a multi-phase interleaved parallel topology is enabled at high power. All power data is transmitted to the vehicle instrument panel via the CAN bus for display.

[0025] Beneficial effects of the present invention:

[0026] 1. By utilizing wind energy to generate electricity and replenish the onboard battery in real time while the vehicle is in motion, the system effectively reduces dependence on external charging facilities. This significantly improves power generation efficiency, especially when driving at high speeds. The dual-battery design combined with an intelligent switching circuit not only achieves seamless power connection, but also automatically optimizes the charging strategy based on the battery status, extending the overall battery pack service life by more than 20%. The system also features a compact structure that does not affect the vehicle's original aerodynamic performance. When the battery power drops below 20%-30%, it automatically switches to unlimited endurance, fundamentally alleviating users' range anxiety.

[0027] 2. This system can work continuously while the vehicle is moving, and is not restricted by environmental conditions. The higher the speed, the greater the power generation. It perfectly matches the energy consumption requirements of electric vehicles when cruising at high speeds, forming a dynamic energy balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a schematic diagram of the workflow of the present invention;

[0029] Figure 2 Shown is a schematic plan view of the wind turbine assembly of the present invention;

[0030] Figure 3 Shown is a schematic diagram of the internal plan of the wind turbine of the present invention.

[0031] Explanation of the accompanying symbols: 1. Wind turbine; 2. Generator blades; 3. Ventilation guard net; 4. Air inlet bevel; 5. Permanent magnet rotor; 6. Plastic steel stator; 7. High-strength coil. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-3 The present invention provides an embodiment: a new energy electric vehicle wind turbine generator system 1, comprising:

[0034] The oblique air inlet 4 is provided at the front end of the electric vehicle and is used to guide and gather the natural wind generated during driving;

[0035] The ventilation screen 3 covers the outside of the air inlet 4 and is used to filter debris and protect internal components;

[0036] The wind turbine 1 is installed behind the wind inlet 4 and is used to convert wind energy into electrical energy;

[0037] Generator blades 2, connected to the rotor of the wind turbine 1, are used to be driven by wind and drive the permanent magnet rotor 5 to rotate and generate electricity;

[0038] A rectifier and voltage stabilizing circuit, connected to the output terminal of the wind turbine 1, for converting AC power into DC power and stabilizing the voltage;

[0039] The vehicle-mounted battery is connected to the rectifier and voltage-stabilizing circuit and is used to store the electric energy generated by the wind turbine 1 to enhance the endurance.

[0040] Furthermore, the present invention provides a streamlined air inlet oblique port 4 and a detachable ventilation guard net 3 at the front end of the electric vehicle, and a wind turbine 1 consisting of a permanent magnet rotor 5, a plastic steel stator 6 and a high-strength coil 7 is installed behind the air inlet oblique port 4. The generator blades 2 are coaxially connected to the permanent magnet rotor 5. When the vehicle is driving, natural wind is accelerated by the air inlet oblique port 4 and drives the blades to rotate to generate electricity. The generated three-phase alternating current is converted into stable direct current by a rectifier and voltage stabilization circuit composed of a three-phase full-bridge rectifier and a Buck-Boost regulator and then input into the vehicle battery. The present invention converts the originally wasted kinetic energy of air into usable electrical energy, and can achieve a continuous power generation power of 300-500W at a vehicle speed of 100km / h, thereby increasing the cruising range of the electric vehicle by more than 20%. At the same time, the streamlined design of the air inlet oblique port 4 reduces the increase in wind resistance to less than 5%. At the same time, the double-layer filtering structure of the ventilation guard net 3 ensures that the generator can still work stably in a dusty environment. The overall system structure is simple and reliable, and can be installed without changing the original structure of the vehicle, with significant energy saving and efficiency improvement and practical promotion value.

[0041] The system integrates a vehicle speed-wind force matching control module, which is used to monitor the electric vehicle's driving speed in real time and dynamically adjust the power generation parameters according to the vehicle speed. When the vehicle speed reaches 20 km / h, the system determines that the wind force is equivalent to level 4 wind and starts the basic power generation mode. When the vehicle speed increases to 100 km / h, it determines that the wind force reaches level 10 to 12 wind and switches to the high-efficiency power generation mode. By adaptively adjusting the electromagnetic load of the generator and the conductivity of the rectifier circuit, it matches the power generation power and battery charging requirements at different vehicle speeds.

[0042] The rectifier and voltage regulator circuit consists of a three-phase full-bridge rectifier, an LC filter module and a Buck-Boost regulator. It is used to convert the three-phase AC power output by the wind turbine 1 into pulsating DC power, smooth the waveform through the LC filter module, and then dynamically adjust the output voltage to the rated charging voltage range of the vehicle battery through the Buck-Boost regulator. The feedback end of the Buck-Boost regulator is connected to the battery's BMS system to adjust the charging current according to the battery's real-time state of charge.

[0043] The electric vehicle is equipped with two energy storage units, a main battery and a backup battery, and is provided with an automatic switching circuit based on a relay group, which is used to monitor the remaining power of the main battery and cut off the main circuit power supply when the power drops to a threshold of 20%-30%. At the same time, the backup circuit is closed to connect the backup battery to the drive system. At this time, the output power of the wind turbine 1 is preferentially charged to the low-power battery through the rectifier and voltage stabilization circuit until its power is restored to more than 50% and switches to the balanced charging mode.

[0044] The cross-section of the oblique air inlet 4 is a tapered streamline structure, and the inclination angle of the windward surface is 15°-25°, which is used to accelerate the airflow and reduce turbulence through the Venturi effect when the vehicle is driving, so that the wind speed entering the ventilation guard net 3 is increased by 20%-30%. At the same time, the inner wall of the oblique opening is covered with a sound-absorbing honeycomb layer to attenuate wind noise. The distance between the oblique air inlet 4 and the wind turbine 1 is 1.2-1.5 times the diameter of the fan blade.

[0045] The ventilation guard net 3 is composed of an outer layer of stainless steel perforated mesh and an inner layer of nylon filter mesh, and is used to prevent foreign matter with a particle size greater than 5 mm from entering the wind turbine 1. The aperture of the stainless steel perforated mesh is 8 mm and the opening rate is 60%-70%. The nylon filter mesh is detachable and fixed by a magnetic frame. Rubber sealing strips are embedded around the ventilation guard net 3.

[0046] Further, the workflow of the present invention is described, specifically:

[0047] When the electric vehicle starts moving, the streamlined air inlet 4 at the front end of the vehicle converges and accelerates the oncoming airflow. After being filtered by the ventilation screen 3, the high-speed airflow drives the generator blades 2 to rotate, driving the permanent magnet rotor 5 coaxially connected to it to cut the magnetic flux lines in the magnetic field formed by the plastic-steel stator 6, and generate three-phase alternating current through the high-strength coil 7. During this process, the vehicle speed sensor monitors the vehicle speed in real time and transmits the data to the control module. When the vehicle speed reaches 20km / h, the system automatically starts the power generation mode.

[0048] The three-phase AC power generated by the wind turbine 1 is first input into the three-phase full-bridge rectifier to convert the AC power into pulsating DC power, and then passes through the LC filter circuit to eliminate ripples. The output voltage is then dynamically adjusted according to the real-time voltage demand of the vehicle battery through the intelligent Buck-Boost regulator. The Buck-Boost regulator establishes real-time data communication with the battery management system (BMS) through the CAN bus, and obtains the core parameters of the battery every 100ms, including the single cell voltage, temperature, remaining capacity SOC and internal resistance change trend. Based on these parameters, the built-in intelligent charging algorithm will dynamically calculate the optimal charging curve. When it is detected that the temperature of any single cell exceeds 45°C or the voltage difference is greater than 0.1V, the graded current reduction protection is immediately triggered, first reducing the charging current to 50% of the rated value. If 1 If the parameters do not return to normal within 0 seconds, they will continue to drop to 20%. At the same time, the output voltage fluctuation is controlled within the range of ±0.5V through PWM modulation. Under normal working conditions, the system adopts a three-stage charging strategy. In the initial stage (SOC < 30%), it uses a constant large current (0.5C) to quickly replenish the power. In the middle stage (30% ≤ SOC ≤ 80%), it automatically switches to a linear decreasing current mode. In the final stage (SOC > 80%), it switches to pulse trickle charging. The entire process automatically corrects the charging parameters through real-time comparison of the battery health status (SOH) data provided by the BMS to ensure that the maximum allowable charging current is automatically reduced as the battery aging degree increases. This dynamic collaborative control mechanism enables the charging efficiency to always remain above 92%, while controlling the temperature difference of the battery pack within 3°C, thereby effectively extending the battery life by 30%.

[0049] The system continuously monitors the state of charge (SOC) of the main battery. When the charge drops to a preset threshold (20%-30%), an automatic switching circuit immediately switches the power supply to the backup battery, while giving priority to charging the low-charge battery. If sufficient wind power generation is detected and the batteries are in good condition, the system can automatically enter dual-battery balanced charging mode, distributing the charging current through an intelligent algorithm. During this process, all operating status and power generation data are transmitted to the on-board display screen via the CAN bus for real-time display.

[0050] The vehicle speed-wind power matching control module dynamically adjusts the power generation system parameters according to the real-time vehicle speed. It adopts constant voltage charging mode at low speed (20-40km / h) and switches to maximum power point tracking (MPPT) mode at high speed (>40km / h) to improve power generation efficiency. At the same time, the system automatically records power generation data at different vehicle speeds and continuously optimizes the control strategy through machine learning algorithms to ensure that the power generation system always operates in the best state. When the vehicle stops or travels at low speed (<10km / h), the system automatically enters standby mode to reduce energy consumption.

[0051] Furthermore, for high-end electric vehicles with a market price of 100,000-1 million yuan, this system provides modular wind power generation solutions. The economical model (100,000-300,000 yuan) is equipped with a compact generator with a rated power of 500-1500W, suitable for a cruising speed of 80-100km / h, and an output voltage of 48-72V. The luxury model (300,000-1 million yuan) is equipped with a high-performance generator of 2000-5000W, which can output a stable current of up to 96V / 50A when the vehicle speed reaches 120km / h. The system intelligently matches the power generation parameters according to the vehicle model positioning, and uses the on-board AI The controller analyzes driving data in real time (including current vehicle speed, motor load, battery SOC, etc.) and dynamically adjusts the generator's excitation strength and rectifier circuit topology to ensure that economy vehicles obtain 800±50W of charging power at 80km / h, while luxury models can stably output 4500±200W of power at 120km / h. All models are equipped with a gradient protection mechanism, which automatically derates when it detects that the battery voltage fluctuation exceeds ±5% or the temperature exceeds 55°C, and pushes performance data of concern to high-end users, such as power generation efficiency and estimated endurance gain, in real time through the HUD head-up display.

[0052] Furthermore, the present invention provides an embodiment, providing a standard new energy electric vehicle wind power generation system:

[0053] The system includes an aluminum alloy air inlet 4 (with an inclination of 22°) installed on the front bumper of the vehicle, a quick-detachable stainless steel ventilation screen 3 with an aperture of 6mm, and an internal integrated radial flux permanent magnet generator with a rated power of 400W (blade diameter of 280mm). The three-phase AC power it outputs is processed by the on-board rectifier and voltage regulator module, and is used to charge the standard 60kWh power battery of the original vehicle through an intelligent distribution circuit. When the vehicle is traveling at a constant speed of 100km / h, the system can stably output 320-350W of electricity, increasing the cruising range by 18-22%. The total weight of the entire system does not exceed 8kg, and the impact on the vehicle's drag coefficient is less than 0.02, making it suitable for modification of most pure electric cars.

[0054] Furthermore, the present invention provides an embodiment for a high-performance implementation method:

[0055] This embodiment is designed for high-speed electric vehicles. Dual air intake channels are symmetrically arranged on both sides of the front bumper, which increases wind speed by 35%. It is also equipped with two 500W axial flux permanent magnet generators and a supporting intelligent control system with MPPT function. When the vehicle speed exceeds 80km / h, the dual-machine parallel mode is automatically activated, with a maximum output power of up to 1.1kW. The system integrates a 98kWh dual battery pack and an intelligent switching manager. It can operate stably in an ambient temperature range of -20°C to 55°C, making it particularly suitable for long-distance freight electric trucks. Actual measurements show that under high-speed conditions, the battery life can be extended by 25-30% and the battery cycle life can be increased by 40%.

[0056] Furthermore, the present invention provides an embodiment for implementing a high-speed electric vehicle:

[0057] Taking a certain high-speed electric vehicle as an example, the vehicle is equipped with an axial flux permanent magnet wind turbine 1 with a rated power of 1.2kW in the front cabin. Its air inlet 4 adopts a NACA airfoil design with an opening cross-sectional area of ​​0.15m 2 , combined with a 60mm aperture stainless steel honeycomb guardrail, when the vehicle cruises at 80km / h, it can generate a compressed airflow with a wind speed of 18m / s, thereby driving the 6-blade carbon fiber wind wheel to generate electricity at a speed of 2800rpm. The whole vehicle is equipped with two sets of 72V / 100Ah lithium battery packs, and energy management is achieved through an intelligent switching controller. The controller integrates a Hall current sensor and a temperature acquisition module. When the main battery SOC is detected to drop to 25%±2%, the following actions are completed within 200ms: first cut off the main contactor, then close the backup contactor, and at the same time switch the wind power output to the B channel of the Buck-Boost charging module to charge the low-power battery pack with a constant current of 35A. Actual measurements show that under continuous high-speed driving conditions, the system can maintain an energy replenishment of 8-10kWh per hour, so that the two sets of batteries can achieve theoretical unlimited endurance when working alternately.

[0058] Through the above steps, by using wind energy to generate electricity and replenish the on-board battery in real time while the vehicle is driving, the dependence on external charging facilities is effectively reduced. At the same time, the dual battery pack design is used in conjunction with the intelligent switching circuit to achieve seamless power connection. When the battery power is less than 20%-30%, it can automatically switch to achieve unlimited battery life, fundamentally alleviating the user's battery life anxiety and solving the problems of limited battery life and single energy replenishment method of electric vehicles.

Claims

1. A new energy electric vehicle wind turbine generator system, characterized in that: Includes: An oblique air inlet (4) is provided at the front end of the electric vehicle and is used to guide and gather the natural wind generated during the driving process; A ventilation screen (3) covers the outside of the air inlet (4) and is used to filter debris and protect internal components; A wind turbine (1) is installed behind the wind inlet (4) and is used to convert wind energy into electrical energy; Generator blades (2) are connected to the rotor of the wind generator (1) and are used to be driven by wind and drive the permanent magnet rotor (5) to rotate and generate electricity; A rectifier and voltage stabilizing circuit connected to the output end of the wind turbine (1) for converting alternating current into direct current and stabilizing the voltage; The vehicle-mounted battery is connected to the rectifier and voltage-stabilizing circuit and is used to store the electric energy generated by the wind turbine (1).

2. A new energy electric vehicle wind turbine generator system according to claim 1, characterized in that: The wind turbine (1) comprises a permanent magnet rotor (5), a plastic-steel stator (6) and a high-strength coil (7), wherein the permanent magnet rotor (5) is coaxially connected to the generator blades (2) and is used to drive the permanent magnet rotor (5) to cut the magnetic flux lines of the plastic-steel stator (6) when the blades are driven to rotate by wind, thereby generating an induced current through the high-strength coil (7) to complete the conversion of wind energy into electrical energy.

3. The new energy electric vehicle wind turbine generator system according to claim 1, characterized in that: The system integrates a vehicle speed-wind force matching control module, which is used to monitor the electric vehicle's driving speed in real time and dynamically adjust the power generation parameters according to the vehicle speed. When the vehicle speed reaches 20 km / h, the system determines that the wind force is equivalent to level 4 wind and starts the basic power generation mode. When the vehicle speed increases to 100 km / h, it determines that the wind force reaches level 10 to 12 wind and switches to the high-efficiency power generation mode. By adaptively adjusting the electromagnetic load of the generator and the conductivity of the rectifier circuit, it matches the power generation power and battery charging requirements at different vehicle speeds.

4. The new energy electric vehicle wind turbine generator system according to claim 1, characterized in that: The rectifier and voltage stabilization circuit is composed of a three-phase full-bridge rectifier, an LC filter module and a Buck-Boost regulator, and is used to convert the three-phase alternating current output by the wind turbine (1) into pulsating direct current, smooth the waveform through the LC filter module, and then dynamically adjust and output the voltage to the rated charging voltage range of the vehicle battery through the Buck-Boost regulator, wherein the feedback end of the Buck-Boost regulator is connected to the battery management system (BMS) system of the battery, and is used to adjust the charging current according to the real-time state of charge of the battery.

5. The new energy electric vehicle wind turbine generator system according to claim 1, characterized in that: The electric vehicle is equipped with two energy storage units, a main battery and a backup battery, and is provided with an automatic switching circuit based on a relay group, which is used to monitor the remaining power of the main battery and cut off the power supply of the main circuit when the power drops to a threshold of 20%-30%, and at the same time close the backup circuit to connect the backup battery to the drive system. At this time, the output power of the wind turbine (1) is preferentially charged to the low-power battery through the rectifier and voltage stabilization circuit until the power of the low-power battery is restored to more than 50%, and then switches to a balanced charging mode.

6. The new energy electric vehicle wind turbine generator system according to claim 1, characterized in that: The cross section of the oblique air inlet (4) is a tapered streamline structure, and the inclination angle of the windward surface is 15°-25°, which is used to accelerate the airflow and reduce turbulence through the Venturi effect when the vehicle is driving, so that the wind speed entering the ventilation protection net (3) is increased by 20%-30%. At the same time, the inner wall of the oblique air inlet is covered with a sound-absorbing honeycomb layer to attenuate wind noise. The distance between the oblique air inlet (4) and the wind turbine (1) is 1.2-1.5 times the diameter of the fan blade.

7. The new energy electric vehicle wind turbine generator system according to claim 1, characterized in that: The ventilation screen (3) is composed of an outer stainless steel perforated mesh and an inner nylon filter mesh, and is used to prevent foreign matter with a particle size greater than 5 mm from entering the wind turbine (1). The aperture of the stainless steel perforated mesh is 8 mm and the opening rate is 60%-70%. The nylon filter mesh is detachable and fixed by a magnetic frame. Rubber sealing strips are embedded around the ventilation screen (3).

8. A control method for a new energy electric vehicle wind turbine generator system, using a new energy electric vehicle wind turbine generator system (1) according to claims 1-7, characterized in that: The following steps are involved: S1, during the vehicle's driving process, the wind turbine (1) captures natural wind through the wind inlet (4) and the ventilation screen (3), drives the generator blades (2) to rotate, and then drives the permanent magnet rotor (5) to cut the magnetic flux lines in the plastic steel stator (6), so that the high-strength coil (7) generates three-phase alternating current. At the same time, the vehicle speed-wind power matching control module monitors the vehicle speed in real time and dynamically adjusts the electromagnetic load of the generator according to the vehicle speed. When the vehicle speed reaches 20 km / h, the system automatically starts the power generation mode. When the vehicle speed exceeds 100 km / h, it switches to the high-speed power generation mode to maximize energy capture. S2, the three-phase AC power output by the wind turbine (1) is input to the rectifier and voltage regulator circuit, which is first converted into pulsating DC power by the three-phase full-bridge rectifier, and then the waveform is smoothed by the LC filter module. Subsequently, the Buck-Boost regulator dynamically adjusts the output voltage to the range of 48V-72V according to the real-time voltage demand of the vehicle battery. At the same time, the rectifier and voltage regulator circuit communicates with the battery management system to obtain the battery charge state and temperature data, and adjusts the charging current according to the obtained data; S3, the system continuously monitors the remaining power of the main battery. When the power drops to a preset threshold, the automatic switching circuit immediately cuts off the power supply circuit of the main battery and closes the access circuit of the backup battery. At the same time, the electric energy generated by the wind turbine (1) is preferentially charged to the low-power battery through the rectifier and voltage stabilization circuit until its power is restored to more than 50%. If the vehicle continues to travel and the wind power generation is sufficient, the system automatically enters the dual-battery balanced charging mode and distributes the charging current through the priority algorithm to extend the overall endurance.

9. The control method of a new energy electric vehicle wind turbine generator system according to claim 8, characterized in that: The set threshold is 20%-30% of the battery capacity. This threshold range is dynamically adjusted through the battery health status monitoring module of the battery management system. When it is detected that the battery cycle number exceeds 500 times or the capacity decays to less than 80% of the initial value, the system automatically increases the switching threshold to 25%-35%. At the same time, this threshold is related to the vehicle driving environment and is automatically relaxed by 5% in low or high temperature environments. All threshold parameters are displayed in real time through the on-board display and support manual fine-tuning of ±3% by the driver.

10. The control method of a new energy electric vehicle wind turbine generator system according to claim 8, characterized in that: The output power of the wind turbine (1) is nonlinearly positively correlated with the vehicle speed. Specifically, when the vehicle speed is in the range of 20-40 km / h, the generated power increases according to a quadratic function curve as the vehicle speed increases, and when the vehicle speed exceeds 40 km / h, it turns to linear growth. The system monitors the speed in real time through a Hall sensor installed at the generator shaft end and feeds back to the vehicle speed-wind power matching control module. The module dynamically adjusts the excitation current of the generator according to a preset speed-power mapping table to optimize the output. At the same time, the Buck-Boost regulator of the rectifier and voltage stabilization circuit automatically switches the working mode according to the change of the generated power, adopts a pulse width modulation method at low power, and enables a multi-phase interleaved parallel topology at high power. All power data are transmitted to the vehicle instrument panel for display via a CAN bus.

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