| 摘要 |
The utility model provides a linear motor, which can reduce inductance and improve cooling performance. The linear motor (1) allows an armature (20) to move forward and backward relative to an excitation part (10), the excitation part (10) comprises an outer magnet yoke (12) and an inner magnet yoke (11), wherein the outer magnet yoke (12) is provided with a plurality of permanent magnets (14S, 14N) in a manner that different polarities of the permanent magnets are alternatively arranged along the forward and backward direction of the armature (20); and at least a part of the inner magnet yoke (11) is covered by a coil (24) of the armature (20) in the circumferential direction, and the inner magnet yoke (11) comprises a first flow path portion (15D) extending in the forward and backward direction and a second flow path portion (15C) which is communicated with the first flow path portion (15D) and extends in a direction vertical to the forward and backward direction. |
