Comparison of Outer Rotor Radial Flux and Axial Flux PM Motors for CMG Application

Date

2014-09-05

Author

Ertan, Hulusi Bülent

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

257
views

0
downloads

Control moment gyroscopes (CMG) are used in modern satellite applications for attitude control of satellites. The volume and mass of the instruments is very important in such applications. In this context, integrating the mass of the CMG, on the stator of the motor, promises to save space and mass. Radial-flux outer-rotor motor is a promising configuration in that respect. In this paper, using such a PM motor is considered for control moment gyroscope applications. The design of the motor must be made such that the specifications, such as accelerating torque, steady-state torque and temperature rise constraint should be taken into consideration, while the mass and volume are kept at minimum. This is a difficult problem to solve. This paper presents an approach for designing the motor to meet these criteria. The findings indicate that the outer-rotor, radial-flux motor based CMG has important advantages and while the mass of the CMG can be reduced to 2/3 of the reference design, the volume is reduced to 1/5 of the reference design.

Subject Keywords

Control moment gyroscope, Permanent magnet machines, Brushless machines, Motor design, Design optimization

URI

https://hdl.handle.net/11511/52829

Conference Name

International Conference on Electrical Machines (ICEM)

Collections

Graduate School of Natural and Applied Sciences, Conference / Seminar

Suggestions

OpenMETU
Core

Choice of Pole Number of Two-Rotor Axial-Flux PM Motor for Control Moment Gyroscope Özlü Ertan, Hatice Gülçin (2011-09-10) Modern low earth orbit satellites use control moment gyroscopes (CMG) for maneuvering. GMC's generally use a brushless DC motor to run an inertial wheel at about 10000 rpm. In this paper axial-flux BLDC motor is considered for this task with a view to design a low volume, low weight CMC. Various axial-flux (AF) motor topologies are possible. However, two-rotor AF topology is found to be more advantageous. The specifications of an existing CMG design, based on a commercial BLDC motor are taken as reference. ...
Design of a control moment gyroscope with outer rotor BLDC motor İnce, Berk; Ertan, Hulusi Bülent; Department of Electrical and Electronics Engineering (2019) The aim of this thesis is to design a control moment gyroscope (CMG) with outer rotor BLDC motor for medium size satellites. CMG is a device that provides high output torque to the satellite in order to maneuvering satellites rapidly. CMG is the most efficient actuator in terms of output torque capacity when it is compared with other type actuators such as the reaction wheel. The first step of the designing CMG is to determine CMG design specifications. The mass and volume specifications of the designed CMG...
Orbit Control of an Earth Orbiting Solar Sail Satellite Polat, Halis Can; Tekinalp, Ozan (2022-09-01) A concept for the utilization of solar sail satellite's propellant-free thrust capability at Low earth orbit (LEO) is proposed and its orbit control strategy is analyzed. Thrust vector control of the sail's normal direction is used to harvest the solar radiation pressure for generating the necessary acceleration to change the orbital elements. The required control vector direction is determined with two approaches. The first approach is realized by approximating the Gaussian Variational Equations at the emp...
Analysis of a UAV that can Hover and Fly Level Cakici, Ferit; Leblebicioğlu, Mehmet Kemal (EDP Sciences; 2016-03-14) In this study, an unmanned aerial vehicle (UAV) with level flight, vertical take-off and landing (VTOL) and mode-changing capability is analysed. The platform design combines both multirotor and fixed-wing (FW) conventional airplane structures and control surfaces; therefore, named as VTOL-FW. The aircraft is modelled using aerodynamical principles and linear models are constructed utilizing small perturbation theory for trim conditions. The proposed method of control includes implementation of multirotor a...
Numerical simulation of two-dimensional collisionless plasma flows under the effect of electrostatic forces via particle in cell method Tümüklü, Özgür; Çelenligil, Mehmet Cevdet; Şengil, Nevsan; Department of Aerospace Engineering (2013) Taking its name from its ability to generate thrust via electricity, the concept of electric propulsion has important space mission applications like station keeping for satellites and deep space probe. However, contamination of plumes in electric propulsion systems with ion beam could hinder communication, and effective neutralization is essential to clear away this predicament. Today, computer simulation is regarded as a powerful tool to investigate plasma behavior in the plumes of electric propulsion dev...

Citation Formats

H. B. Ertan, “Comparison of Outer Rotor Radial Flux and Axial Flux PM Motors for CMG Application,” presented at the International Conference on Electrical Machines (ICEM), Berlin, Germany, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52829.