Analytical Model of Eddy Currents in a Reaction Sphere Actuator

被引：18

作者：

Strumik, Marek ^{[1
]}

Wawrzaszek, Roman ^{[1
]}

Banaszkiewicz, Marek ^{[1
]}

Seweryn, Karol ^{[1
]}

Sidz, Michal ^{[1
]}

Onillon, Emmanuel ^{[2
]}

Rossini, Leopoldo ^{[2
]}

机构：

[1] Polish Acad Sci, Space Res Ctr, PL-00716 Warsaw, Poland

[2] Swiss Ctr Elect & Microtechnol, Syst Div, CH-2000 Neuchatel, Switzerland

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2014年 / 50卷 / 06期

关键词：

Eddy currents; satellite attitude control; spherical actuator; ROTATION; TORQUE;

D O I：

10.1109/TMAG.2014.2298215

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A recently proposed technique to control the satellite attitude using a magnetically levitated sphere requires the development of suitable models of its dynamics. One of the phenomena that can affect motion of the system are eddy currents induced in the stator of the actuator due to time variable magnetic field generated by rotational motion of a permanent magnet rotor. We present an analytical model of the eddy currents for the actuator with eight-pole rotor. The model is derived using a second-order vector potential-based approach, and the solution is obtained in terms of spherical harmonic functions. This model allows us to study rotor rotations with constant angular frequency around an axis arbitrarily oriented with respect to both rotor and stator of the reaction sphere actuator.

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