Influence of Different Factors on the Static Force Characteristics of a Permanent Magnet Linear Actuator
Abstract:Static force characteristics of recently developed permanent magnet linear actuator with increased energy efficiency are studied. The actuator consists of several cores with coils placed on a common yoke and a moving permanent magnet. It is intended for individual driving a needle in a knitting machine. The actuator is subject to specific requirements—having four stable positions without supply and maintaining minimum static force during the whole working stroke. Three-dimensional finite element method was employed for modelling of the magnetic field and computation of the electromagnetic force of the actuator. Two actuator constructions were studied—with single and double sided core. The influence of the magnet length and the coil magnetomotive force are estimated and conclusions regarding their proper choice are drawn.
Document Type: Research Article
Publication date: June 1, 2009
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