Generation of 2D Vector Magnetic Field by Mangle-Type Magnetic Field Source Using Permanent Magnets

Abstract

Generating a magnetic field with a desired magnitude and direction in a plane by using a mangle-type magnetic field source with four permanent magnets is discussed. Two rotation patterns were compared by using a 2D finite element method in terms of the controllability of the magnetic field and the uniformity of the generated magnetic field. In both patterns, the arrangement of magnets that generates the maximum magnetic field corresponds to a Halbach cylinder. It was found that one of the rotation patterns is superior for controlling the magnitude and direction of the magnetic field independently, while it is inferior in terms of uniformity. Finally, the above findings were demonstrated with a prototype, although a slight deviation was seen between the simulation and the demonstration.