Comparative Study of Two Degree-of-Freedom Rotary-Linear Machines With Permanent-Magnet Mover for High Dynamic Performance

This paper analyzes and evaluates various topologies of yokeless rotary-linear (RL) machine with permanent-magnet (PM) mover targeting for the achieving high dynamic performance. For conventional RL machines, single-stator topology features limited slot area armature winding excited both motions, coupled magnetic fields motions requires complex control strategy. In order to mitigate these issues, a double-stator hybrid PMs array, which adopts six magnetization directions, is proposed in this paper. An improved array introduced achieve decoupled motions. addition, an analytical model radial flux density derived reveal characteristics different topologies. The parametric studies towards key dimensions are conducted provide design guidelines obtain optimal design. Finally, electromagnetic performances compared systematically counterparts. It revealed that can enhance namely rotary linear