Electromagnetic device

The present invention provides an electromagnetic device in which a field magnet part is opposed to an armature part for a relative movement, the field magnet part having a plurality of permanent magnets arranged so that the magnetizing direction is changed in order by a set angle [Theta] each time and the length is a natural-number multiple of the length of one magnetic pole cycle. In the armature part, coils in each phase are arranged in order and the coils in the same phase are connected to each other so that a similar current flows through each coil. With this arrangement, even when a change in a distribution of magnetic flux interlinking the coils occurs in an end portion in the direction of the movement of the field magnet part, the electromagnetic device can suppress the end effect in which this change occurs to some of the coils, thereby effectively suppressing a thrust ripple caused by the end effect.