Fast acceleration reaction force cancelling motor

摘要

Particular embodiment of the invention relates to motors that produce reaction force cancellation and are thus well suited to applications where accelerations and reaction forces are relatively large. Such motors are particularly well suited to precision machinery that can benefit from fast accelerations with short settling times. In particular, the motors include movable and counter-movable motor members, where the counter-movable motor member has a reaction mass to counter the reaction force of the first movable motor member.

主权项

1. A motor assembly, comprising:
a base; a motor comprising:
a first movable motor member mechanically isolated from the base by a first bearing arrangement and responsive to reaction forces applied thereto;a second movable motor member disposed relative to the first movable motor member and mechanically isolated from the base by a second bearing arrangement, the second movable motor member being substantially free moving and having a reaction mass to counter movement of the first movable motor member; a work element secured to the first movable motor member; and a control system for applying a reaction force to the first movable motor member, the reaction force calculated to move the work element from a first position to a second position, where the reaction force includes a factor for the reaction mass of the second movable motor member and wherein the reaction force yields a linear acceleration of at least 1 g at a portion of the work element.