| 摘要 |
PURPOSE: A three phase linear motor system including a forcer is provided to reduce manufacturing costs of the linear motor system. CONSTITUTION: A three phase linear motor system(10) includes a forcer(12) that is oriented in a spaced apart relationship relative to a platen(14), which defines the path along which the forcer can traverse in a direction, indicated by arrow(16). The forcer(12) includes three pole pairs(30,32,34), each having at least four associated teeth(36,38,40), respectively, which teeth are 180 degrees out of phase with each other in each pole pair. The three sets of teeth(36,38,40) are spaced 120 degrees apart from each other in the direction so that one or more tooth of one set of teeth can be aligned with a platen teeth(18) during movement of the forcer(12) relative to the platen(14).
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