Analysis of Electric Machine Charateristics for Robot Eyes Using Analytical Electromagnetic Field Computation Method
- Authors
- Kang, Dongwoo; Lee, Ju
- Issue Date
- Feb-2014
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Approximation methods; computational electromagnetic; humanoid robots; interpolation
- Citation
- IEEE TRANSACTIONS ON MAGNETICS, v.50, no.2, pp.1 - 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON MAGNETICS
- Volume
- 50
- Number
- 2
- Start Page
- 1
- End Page
- 4
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/160746
- DOI
- 10.1109/TMAG.2013.2278937
- ISSN
- 0018-9464
- Abstract
- This paper proposes an electromagnetic field computation method using an interpolation method with sigmoid functions. This method is useful for approximating and developing a 3-D electromagnetic field model. Particularly, the authors have been researching a spherical motor for a robotic eye. The spherical motor has a spherical air-gap unlike the radial air-gap motor or the axial air-gap motor. The spherical motor proposed in this paper realizes three degrees-of-freedom movements with only one motor. As the spherical motor has a complicated coil structure, the 3-D FEM would be essential for calculating torque while the rotor is tilted. However, 3-D FEM requires much computation time and a huge memory capacity to store the results. The electromagnetic field is rapidly calculated using an interpolation torque function proposed in this paper. The improvement of the spherical motor due to our method is verified through experiment, the results of which are compared with simulation data.
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