Patent ID: 8587161

Claim:
A moving device comprising at least a first element provided with main magnets and auxiliary magnets and a second element provided with coils, wherein the main magnets are arranged in a grid of rows and columns, wherein at least main magnets in adjacent rows are oppositely polarized and staggered relative to each other, while auxiliary magnets of the same polarity are disposed between the main magnets at least in a number of rows, wherein the strength of the magnetic field of said auxiliary magnets is different from that of the main magnets, wherein the coils can be energized for moving the first element relative to the second element in a direction parallel to the rows as well as in a direction parallel to the columns, wherein the first element is provided with a number of disc-shaped magnetic segments and permanent magnets disposed between said disc-shaped magnetic segments, wherein said permanent magnets located adjacent to each other are oppositely polarized in an axial direction, while said disc-shaped magnetic segments form the main magnets and the auxiliary magnets.