A novel electromagnetic linear actuator with inner and outer stators and one moving winding for tactile display

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 these use may be evaluated by output force, output power, stroke, compactness, and so on. The proposed new actuator has better performance in terms of stroke, compactness, and output force compared with existing actuators. Moreover, it does not need a position sensor to detect the mover position. The proposed actuator is an electromagnetic linear mini-actuator with two stators and one moving winding. 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 will be presented in this paper.