MOVING MAGNET MOTORS

摘要

An apparatus includes a load, a lever that is coupled to the load, and an electric motor that is coupled to the lever for driving the lever in oscillatory, rotary motion about a pivot axis. The electric motor includes an armature and a stator. The armature is coupled to the lever and includes a permanent magnet. The stator defines an air gap within which the armature is disposed. The stator is configured for creating magnetic flux across the air gap for the permanent magnet to interact with, thereby to drive motion of the load. The electric motor is configured such that substantially no detent forces (a/k/a cogging forces) are generated between the stator and the permanent magnet as the lever is driven by the motor.

主权项

1. An apparatus comprising:
I.) a load; II.) a lever coupled to the load; and III.) an electric motor coupled to the lever for driving the lever in oscillatory, rotary motion about a pivot axis, the electric motor comprising:
A.) an armature comprising a permanent magnet, the armature being coupled to the lever; andB.) a stator defining an air gap within which the armature is disposed, the stator being configured for creating magnetic flux across the air gap for the permanent magnet to interact with, thereby to drive motion of the load, wherein the electric motor is configured such that substantially no detent forces are generated between the stator and the permanent magnet as the lever is driven by the motor.