A novel small linear actuator for tactile display using high density magnetic flux

A novel linear actuator for a tactile display is proposed, especially for Braille aimed for visually impaired people, and also for a new human haptics interface. The features of actuators for this use may be evaluated by output force, stroke, and compactness. The proposed new actuator has better performance in terms of above features compared with other actuators. The proposed actuator is a small linear actuator with inner stator, outer stators and mover. The direction of the output force can be controlled by changing polarity of the input current. The structure, JMAG simulations, and the experimentally measured data are presented in this paper.

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