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Title:
LINEAR MOTOR, AND CONVEYANCE SYSTEM USING THE SAME
Document Type and Number:
Japanese Patent JP2012095414
Kind Code:
A
Abstract:

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.


Inventors:
WATABE NOBORU
TSUNOGUCHI KENJI
Application Number:
JP2010239450A
Publication Date:
May 17, 2012
Filing Date:
October 26, 2010
Export Citation:
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Assignee:
MURATA MACHINERY LTD
International Classes:
H02K41/03; B65G23/23
Domestic Patent References:
JP2008125345A2008-05-29
JP2010130740A2010-06-10
JP2004297977A2004-10-21
JPH0799767A1995-04-11
JP2002119040A2002-04-19
Foreign References:
US20080111430A12008-05-15
Attorney, Agent or Firm:
Masashi Noda
Shuji Sugimoto
Kenro Tsutsumi