Patent ID: 6664692
Filing Date: 2003-12-16
Classification: H02K

Abstract:
Slow moving electrical machine, comprising an annular set of windings on iron cores of laminated sheets or pressed iron powder, and a corresponding annular set of permanent magnets, the windings being concentrated and the machine having a number of grooves between the cores which is different from a number of poles of the permanent magnets,the number of grooves s and the number of poles p being defined by |sâˆ’p|=2*m and s=12*n*m, where n and m are natural numbers, the iron cores being arranged such that iron cores having windings alternate with iron cores without windings, the cores being disposed in groups corresponding to three phase operation of the machine with 2*m groups of windings per phase, with adjacent wound cores within a group being connected in series, and groups of cores being connected in series or in parallel.