Patent ID: 6097114
Filing Date: 2000-08-01
Classification: G03F,H02K

Abstract:
An apparatus comprising:a substantially planar plurality of magnetic poles which generate a magnetic field of periodic alternating polarity;a substantially planar coil array cooperating with said magnetic field, said coil array comprising a plurality of individual coils, each said individual coil including a coil unit;a commutation circuit configured to provide electric current to said coil array;wherein said coil array includes a first coil set including a first coil and a second coil set including a second coil, said first coil set and said second coil set respectively configured to generate a first electromagnetic force in a first principal direction and a second electromagnetic force in a second principal direction in response to said electric current in cooperation with said magnetic field; andwherein each said coil unit comprises an electrical conductor defining a closed band having a substantially planar geometric polygonal shape, said closed band having inner edges surrounding a void.