Novel permanent magnet block external efficient rotor propeller for unmanned aerial vehicle and manned aerial vehicle

Abstract

A novel permanent magnet block external efficient rotor propeller of an unmanned aerial vehicle and a manned aerial vehicle is characterized in that a permanent magnet block is externally arranged on a rotor structure, magnetic field distribution is optimized, and the thrust and efficiency of the propeller are remarkably improved. According to the design of the propeller, the newest policy of low-altitude airspace management is fully considered, and the national requirement for low-altitude economic high-quality development is met. The propeller is expected to become a key component for promoting the progress of the low-altitude industry and assists in realizing optimal utilization of airspace resources. The design is as shown in figure (figure 1), a stator is an outer ring, a plurality of groups of S-pole and N-pole winding coils are oppositely arranged on the inner side of the stator, and a rotating magnetic field is generated after the stator is electrified. The design of the rotor is shown in figure (figure 2), the rotor is an inner ring, a plurality of groups of S-stage and N-stage permanent magnets are oppositely mounted on the outer side of the rotor, the center of the rotor is the center of the propeller instead of a shaft, and the shaft is located at the position, generating a rotating magnetic field, of the outer side of the rotor and the inner side of the stator. A fixing piece is arranged in the center of the rotor and used for fixing and connecting propeller blades.

Description

1. Technical field:

[0001] The technical field of application of this invention patent is: low-altitude, medium-low altitude, and high-altitude manned and unmanned propeller aircraft that can be reached by future technological development. As the propeller of all propeller aircraft, it provides the aircraft with efficient flight lift and speed as well as the ability to hover, adjust attitude, etc. 2. Background technology:

[0002] 1. Brushless motor: Brushless DC Motor (BLDC) is a highly efficient and durable electric motor. Its working principle is based on electronic commutation technology, which replaces the mechanical commutation device of traditional brushed motor.

[0003] Stator: Made of laminated silicon steel sheets, with multiple sets of winding coils (usually three-phase) embedded in it. The stator windings are arranged in a specific way (such as star or triangle), and a rotating magnetic field is generated when energized. Rotor: Made of permanent magnets (such as neodymium iron boron), no external power supply is required. Common structures include inner rotors (magnets in the center) and outer rotors (magnets on the periphery), the latter of which is commonly found in drone motors.

[0004] 2. Existing common drone propellers. 3. Summary of the invention:

[0005] A new type of high-efficiency rotor propeller with external permanent magnet blocks for UAVs and manned aircraft. The core of this propeller is to place the permanent magnet blocks outside the rotor structure, optimize the magnetic field distribution, and significantly improve the thrust and efficiency of the propeller. Through precise calculation and material selection, a lightweight design is achieved to ensure that the aircraft can operate stably and efficiently in all types of airspace. The propeller is suitable for G and W non-controlled airspaces, especially for micro and light unmanned aerial vehicles with a true altitude of less than 120 meters in W airspace. It complies with the provisions of the "National Airspace Basic Classification Method" and the "Interim Regulations on the Flight Management of Unmanned Aircraft", and helps the efficient development of the low-altitude economy. The design of this propeller fully considers the latest policies on low-altitude airspace management to ensure safe and efficient flight in G and W airspaces. Its lightweight and high-efficiency characteristics not only improve the endurance of the aircraft, but also reduce energy consumption, which meets the country's requirements for high-quality development of the low-altitude economy. Through technological innovation, the propeller is expected to become a key component to promote the progress of the low-altitude industry and help achieve the optimal utilization of airspace resources.

[0006] Its design is shown in the figure ( Figure 1 ). The stator is an outer ring, and arrays of S-level and N-level winding coils are installed opposite to each other on the inner side of the stator, which generates a rotating magnetic field when powered on.

[0007] The rotor design is shown in the figure ( Figure 2), the rotor is the inner ring, and arrays of S-level and N-level permanent magnets are installed opposite to each other on the outside of the rotor. The center of the rotor is the center of the propeller. This is not the axis. The axis is located at the position where the rotating magnetic field is generated on the outside of the rotor and the inside of the stator. A fixing is set at the center of the rotor to fix and connect the propeller blades. In addition, the propeller blades in this design are made of high-strength composite materials to ensure the stability and durability of the blades in high-speed rotation. By optimizing the aerodynamic design of the blades, the propeller's propulsion efficiency is further enhanced.

[0008] The overall design idea is that since this invention is based on existing technology and is easy to explain, only a brief explanation is needed and expressed with simple diagrams. The permanent magnet block is placed outside the rotor propeller, which not only avoids direct contact between the magnet and the winding and reduces energy loss, but also facilitates thermal management and improves the reliability of the overall system. The design adopts a modular structure, which is easy to maintain and replace, and adapts to the needs of diverse flight missions. In addition, the optimized rotor propeller design can effectively reduce noise and provide more friendly environmental conditions for drones to fly in sensitive areas such as residential areas. The modular design of the propeller not only improves maintenance efficiency, but also reduces downtime, thereby improving the utilization rate of the aircraft. The innovative external permanent magnet block makes the magnetic field distribution more uniform, greatly reduces the heating of the motor, and thus extends the life of the propeller. By designing a gap between the rotor and the stator, the propeller can also ensure excellent flight stability when facing complex meteorological conditions. 4. Description of the drawings:

[0009] 1. Figure 1 Note: This figure is a simplified schematic diagram of the stator. As shown in the figure, this is a propeller stator. Arrays of winding coils (S-level and N-level) are installed opposite to each other on the inner wall or inner ring of the stator, and a rotating magnetic field is generated when power is turned on.

[0010] 2. Figure 2 Description: This figure is a simplified schematic diagram of a rotor propeller. As shown in the figure, the rough figure is a rotor propeller. An array of S-level and N-level permanent magnets are installed opposite to each other on the outside of the rotor. The center of the rotor is the center of the propeller. This is not the axis. The axis is located at the position where the rotating magnetic field is generated on the outside of the rotor and the inside of the stator. A fixing piece is set at the center of the rotor to fix and connect the propeller blades.

[0011] 3. Figure 3 Description: This figure is a schematic diagram of the clearance fit assembly between the stator and the rotor propeller. As shown in the figure, the outer ring is the stator and the inner ring is the rotor propeller. The clearance fit between the two generates a rotating magnetic field when the stator is energized, driving the rotor propeller to rotate at high speed to generate lift.

Claims

1. The number of propeller blades has nothing to do with that shown in the figure. For any individual or organization that uses or cites this invention patent, the number of propeller blades is within the scope of this invention.

2. The number of coil windings and permanent magnet blocks are both even numbers, but the number of winding coils and the number of permanent magnet blocks are not limited to be equal. The number of winding coil groups can be large and the number of permanent magnet blocks can be small; or the number of winding coil groups can be small and the number of permanent magnet blocks can be large.

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