IRONLESS MAGNETIC LINEAR MOTORS HAVING LEVITATING AND TRANSVERSAL FORCE CAPACITIES

摘要

A ironless magnetic motor (21-23) employs a magnetic track (30) and a forcer (40). The forcer (40) is orientated a magnetic field (ß) across a linear air gap of the magnetic track (30) to generate a drive force (F_x) parallel to the X drive axis and orthogonal to the Z levitation axis in response to a commutation drive current (I_x) and to generate a force (F_z, F_y) orthogonal to the X drive axis in response to a commutation coil current (I_z, I_y) being superimposed on and phase shifted from the commutation drive current (I_x). To this end, a set of levitating turns of the coil (41) parallel to the X drive axis and orthogonal to the Z levitation axis may be internal or external to magnetic field (ß), and the forcer (40) may be centered or offset from a center X-Z longitudinal axis (CP) of the linear air gap.