Access time minimization of a moving coil actuator with volumetric, magnetic and current constraints

Abstract

The existence of global optima for access time and dissipated power is demonstrated by analysis and numerical example for a volume constrained, magnetically constrained, and electrically constrained moving coil actuator. A simple iterative procedure for access time and power is given. The optima are illustrated by numerically obtained plots for a typical disk drive with 5.25 in diameter disks and a split magnetics linear actuator. The usefulness of the assumptions made for the analysis is discussed.<>