MAGNET ASSEMBLY

摘要

An electromagnet comprising a ferromagnetic yoke which comprises a yoke. Mutually opposing first and second pole pieces are provided. The first pole piece is provided with a planar coil having a first side facing the yoke and a second side facing the yoke. A balancing member is arranged on the second side of the planar coil to counterbalance the attractive force between the planar coil and the yoke. The other pole piece may also be provided with a corresponding balancing member.