Development of single-winding linear oscillatory actuator

The movable element (rod) used for Linear Oscillatory Actuator ("LOA") fall into three main types: the coil type, iron-core type, and permanent magnet type. Artificial heart actuators that require forward and reverse moving rods should use the permanent magnet type moving rods in order to obtain the necessarily high degree of reliability. This LOA uses very few components and has a highly simplified structure, and it provides the forward-reverse motion required for the basic operation of artificial hearts without using a converter mechanism, and therefore promises to be a simpler and more reliable actuator. From the perspective of the authors, this research and development aimed at smaller and more lightweight LOAs is noteworthy for its potential application in totally implantable artificial hearts. This article describes the authors' permanent magnet single-winding LOA in terms of its structure, static thrust characteristics, frequency characteristics, and other features as shown in experiment results, and also describes the LOA'S high output based on magnetic field analysis.