Abstract
This paper addresses the problem of dynamic characteristics of a moving-coil-type linear actuator (MctLA) to satisfy the requirements of higher output electromagnetic force and faster response time. A novel coils combination approach is presented because the time constant and the electrified currents are highly relevant to the resistance and the inductance. A general coil is divided into several segments and then used in parallel and series so that three different combinations of the electrified coils are developed. A mathematical model related to the output electromagnetic force, displacement response time, acceleration of the proposed MctLA is presented, respectively. Simulations results show that if the electrified coils are divided into three sections and used in parallel, the dynamic and static performances of the proposed MctLA are greatly improved. Numerical simulation and experimental results prove the usefulness of the electrified coils combinations approach, and the proposed MctLA can display high frequency response characteristics.
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