Abstract
A lot of space equipment such as the gyroscope, the antenna, the paddle of the solar cell panel, and the reaction wheel need to be driven in multi degrees of freedom. The spherical motor can rotate and positioning the rotor in any direction. Therefore, the spherical motor is suitable for driving such equipment. In this paper, a reaction wheel is picked up from the equipment. Then, discuss the advantages and the problems of the spherical motor for driving the reaction wheel. The specifications of the JAXA planned reaction wheel, CSEM designed reaction sphere, and the AIST developed spherical motor are compared. The AIST developed spherical motor can be applied to the spherical reaction wheel.
