Linear drive device with a magnet yoke body and a permanent magnetic armature

A linear drive device comprising:

• an excitation winding producing a variable magnetic field;
• a magnetic-flux-guiding main yoke body accommodating the excitation winding and having multiple limbs including a central limb;
• a winding-free counter-yoke body disposed opposite to the main yoke body;
• an axial gap formed between the main yoke body and the counter-yoke body;
• an armature body provided with at least two permanent magnetic magnet parts arranged axially one behind the other and having opposite magnetization, each of the at least two magnet parts having a magnet axial extension dimension, the armature body being set in axially oscillating motion by the magnetic field of the excitation winding in the axial gap;
• and
• each of the multiple limbs of the main yoke body having a pole surface facing the armature body and defining a pole surface width dimension extending across the axial width of the pole surface, the pole surface width dimension of each of the multiple limbs being substantially the same, each of the multiple limbs being spaced apart from one another axially by a pole surface spacing dimension, the magnet axial extension dimension of each magnet part being approximately equal to the sum of the pole surface width dimension and the pole surface spacing dimension.

A linear drive device comprising

• an excitation winding producing a variable magnetic field;
• a magnetic-flux-guiding main yoke body accommodating the excitation winding and having multiple limbs including a central limb and lateral limbs;
• a winding-free counter-yoke body disposed opposite to the main yoke body;
• an axial gap formed between the main yoke body and the counter-yoke body;
• an armature body provided with at least two permanent magnetic magnet parts arranged axially one behind the other and having opposite magnetization, each of the at least two magnet parts having an axial extension dimension, the armature body being set in axially oscillating motion by the magnetic field of the excitation winding in the axial gap;
• and
• the main yoke body and the counter-yoke body forming a common yoke body with common lateral limbs, the central limb of the main yoke body having an axial width dimension at a pole surface facing the armature body, the axial width dimension being at least as large as the axial extension dimension of each of the at least two magnet parts.