scholarly journals Electromagnetic Field Analysis and Design of a Hermetic Interior Permanent Magnet Synchronous Motor with Helical-Grooved Self-Cooling Case for Unmanned Aerial Vehicles

2021 ◽  
Vol 11 (11) ◽  
pp. 4856
Author(s):  
Hae-Sol Lee ◽  
Myeong-Hwan Hwang ◽  
Hyun-Rok Cha
Keyword(s):  
Electromagnetic Field ◽  
Unmanned Aerial Vehicles ◽  
Permanent Magnet ◽  
High Power ◽  
Heat Dissipation ◽  
Power Source ◽  
Flight Duration ◽  
Aerial Vehicles ◽  
Drive Motor ◽  
Interior Permanent Magnet

As unmanned aerial vehicles expand their utilization and coverage, research is in progress to develop low-weight and high-performance motors to efficiently carry out various missions. An electromagnetic field interior permanent magnet (IPM) motor was designed and analyzed in this study that improved the flight performance and flight duration of an unmanned aerial vehicle (UAV). The output power and efficiency of a conventional commercial UAV motor were improved by designing an IPM motor of the same size, providing high power output and high-speed operation by securing high power density, wide speed range, and mechanical stiffness. The cooling performance and efficiency of the drive motor were improved without requiring a separate power source for cooling by introducing the helical-grooved self-cooling case, which has a low heat generation structure. Furthermore, the motor is oil-cooled through rotating power without a separate power source, reducing the weight of the UAV. The heat dissipation characteristics were verified by fabricating a prototype and taking actual measurements to verify the validity of the heat dissipation characteristics. The results of this study are expected to improve the flight duration and performance of UAVs and contribute to the efficiency of the design of a UAV drive motor.

scholarly journals MODERN APPROACHES TO THE ORGANIZATION OF A RELIABLE JAM–RESISTANT AND SECURED SATELLITE COMMUNICATION CHANNEL WITH UNMANNED AERIAL VEHICLES

2021 ◽  
pp. 78-87
Author(s):  
V. Soboliev ◽  
M. Herashchenko ◽  
S. Rudnichenko ◽  
S. Trofymenko ◽  
V. Ilienko
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Communication Channel ◽  
Satellite Communication ◽  
Communication Channels ◽  
Unmanned Aircraft ◽  
Line Of Sight ◽  
Flight Duration ◽  
Operational Conditions ◽  
Stage Of Development ◽  
Aerial Vehicles

At the present stage of development of unmanned aircraft systems work continues at a rapid pace to further improve their capabilities in the direction of more effective combat and special tasks. This is especially noticeable in two key areas: increasing the range and flight duration; reducing the physical size of the unmanned aerial vehicles. The combination of increasing flight duration and decreasing design characteristics significantly affects the requirements for unmanned aircraft system communication equipment and the development of a beyond line of sight satellite communication channel, which is currently considered as the main channel for transmitting intelligence, telemetry information in real time. Under existent warfighting conditions, the development of communication lines on the principle of a beyond line of sight with the use of ground or airborne relay stations, or through the introduction of additional ground control stations is virtually unjustified, due to the high dynamics of operational conditions and time constraints for decision making. In this context, the unmanned aerial vehicles' satellite communication channels are subject to strict requirements to ensure the combat missions are carried out successfully and safely. The article examines current approaches to the implementation of satellite communication channels with unmanned aerial vehicles in the context of the requirements for both on–board equipment and directly to the development of a satellite communication channel. Recommendations are given for the basic requirements for the organization of satellite duplex communication beyond line–of–sight with unmanned aerial vehicles based on geostationary (medium-altitude) high throughput satellites in the Ka frequency range.

scholarly journals The Influence of Ultrashort Electromagnetic Pulses on Unmanned Aerial Vehicle Control Systems

2020 ◽  
Vol 9 (7) ◽  
pp. 639-643
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Control Systems ◽  
Data Exchange ◽  
Critical Infrastructure ◽  
Armed Forces ◽  
Electromagnetic Pulses ◽  
Flight Duration ◽  
Aerial Vehicles ◽  
Aerial Vehicle ◽  
Important Means

The development of technologies for the development and use of unmanned aerial vehicles (UAV) for military purposes is especially notable. Modern UAV are used as one of the most important means increasing combat capabilities of the Armed Forces. Their combat use is desirable when performing tasks characterized by a long flight duration, increased danger and complexity. The use of UAV to ensure the safety of civilian objects and critical infrastructure facilities is also highlighted, forcing more attention to be paid to new methods of monitoring and monitoring the earth's surface. The analysis showed that there are potential threats of the emergence news power electromagnetic means of influence on unmanned aerial vehicles using ultrashort electromagnetic pulses. The article analyzes the characteristics of existing means generating ultrashort electromagnetic pulses and the trivial characteristics of aviation data exchange protocols. The necessity of testing telecommunication control systems for unmanned aerial vehicles based on the influence of ultrashort electromagnetic pulses is shown, and the experimental method is the most promising method for assessing their impact.

Advanced High-Power-Density Interior Permanent Magnet Motor for Traction Applications

2014 ◽  
Vol 50 (5) ◽  
pp. 3235-3248 ◽  
Author(s):  
Ayman M. EL-Refaie ◽  
James P. Alexander ◽  
Steven Galioto ◽  
Patel B. Reddy ◽  
Kum-Kang Huh ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Power Density ◽  
High Power ◽  
High Power Density ◽  
Permanent Magnet Motor ◽  
Interior Permanent Magnet ◽  
Interior Permanent Magnet Motor

scholarly journals Alternative power source for Small Unmanned Aerial Vehicles (UAV)

2018 ◽  
Vol 19 (9) ◽  
pp. 152-155
Author(s):  
Piotr Mazur
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Power Source ◽  
Aerial Vehicles ◽  
Alternative Power ◽  
Alternative Sources

The article discusses problems of current and development of new, alternative sources of power used for small unmanned aerial vehicles.

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