| 摘要 |
A three phase linear motor system includes a forcer having three pole pairs, which are moveable relative to a platen. The pole pairs are arranged to oppose associated teeth of the platen. The platen teeth are spaced apart from each other in a travel direction according to a predefined tooth pitch. Each of the pole pairs includes a set of teeth that extend from magnetically coupled poles toward the platen. The set of teeth of one of the pole pairs is spaced from the sets of teeth for the other two poles by distances functionally related to about 120 degrees and 240 degrees, respectively, of the tooth pitch.
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