To resolve a problem of reduction in inductance at both ends of an armature to avoid complication of a control system and reduction in motor efficiency, in a synchronization type linear motor in which a primary side armature is a stationary side.
A linear motor 1 consists of a stationarily-installed primary side armature 3, and a secondary side movable element 4 consisting of a permanent magnet. The armature 3 has electrodes 3U, 3V, and 3W corresponding to respective phases of a three-phase alternating current. In this type of linear motor 1, an intermediate electrode 3V other than the both-end electrodes 3U and 3W in an electrode alignment direction has a core shape by which a magnetic resistance to the movable element 4 becomes larger, or has the smaller number of coil windings, compared with the both-end electrodes 3U and 3W. Although only one primary side armature 3 may be provided, a discrete-arrangement type linear motor in which armatures 3 are arranged at an interval in a movable element movement direction can be applied more effectively.
JP2010517498 | Rotational drive with linear primary component segment |
JPS5454216 | POLYPHASE LINEAR MOTOR |
TSUNOGUCHI KENJI
JP2008125345A | 2008-05-29 | |||
JP2010130740A | 2010-06-10 | |||
JP2004297977A | 2004-10-21 | |||
JPH0799767A | 1995-04-11 | |||
JP2002119040A | 2002-04-19 |
US20080111430A1 | 2008-05-15 |
Shuji Sugimoto
Kenro Tsutsumi