Patent ID: 6522035
Filing Date: 2003-02-18
Classification: H02K

Abstract:
A forcer for a three phase servo motor system for use with a platen having teeth of a non-permanent magnetic material, comprising:three pole pairs, each of the three pole pairs including at least two operatively connected poles that are magnetically coupled together; a coil operatively associated with each of the three pole pairs, each coil being operative to provide an electromagnetic field at the respective pole pair when energized; and a set of teeth associated with each of the three pole pairs, the set of teeth associated with a second pole pair of the three pole pairs being offset relative the set of teeth associated with a first pole pair of the three pole pairs by about (+/âˆ’120Â°+L*180Â°)*P/360Â°, where L is a natural number and P is the tooth pitch, and the set of teeth associated with a third pole pair of the three pole pairs being offset relative the set of teeth for the first pole by about (+/âˆ’240Â°+M*180Â°)*P/360Â°, where M is a natural number.