Control Methods of Sine-Cosine Motor for Space Application

Electric motors which are used in spacecraft for different payload mechanism should be capable to deliver smooth and continuous torque efficiently in terms of power and mass. Slot-less Sine-Cosine motor, a type of Brushless Permanent Magnet motor with sinusoidal back emf pattern is a suitable candidate for such applications. This paper presents the control methods of a Slot-less Sine-Cosine Motor. Two major control methods are discussed with its merits and demerits.