Improvement on characteristics of linear oscillatory actuator for artificial hearts

The authors discuss improvements to develop a simple structured, permanent magnet single-winding linear oscillatory actuator (LOA) for total implantable artificial heart actuators. Two methods for improving the starting thrust of the LOA are considered: one is improvement by structural analysis; another is improvement by the exciting current control. In the first method, the starting thrust could be improved by the authors' investigations into the mover diameter, stator inductor shoe dimension and other factors. In the second, the current waveforms to obtain arbitrarily static thrust characteristics with respect to displacement were calculated.<
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