Proposed of Novel Linear Oscillating Actuator’s Structure Using Topology Optimization

This paper proposes a novel magnetic structure of a linear oscillating actuator (LOA). The higher efficient magnetic structure is necessary for reduction in size and weight of an LOA. In a conventional optimization method using a genetic algorithm, it depends on an initial shape hard, and it is difficult to get a novel magnetic structure. In this paper, the topology optimization method which does not need the initial shape is applied to an LOA. The unguessed magnetic structure with magnetization direction and ferromagnetic shape is computed, and the validation of calculated structure is confirmed through the measured results.