Electrical machine
AssigneeSmart Motor AS
InventorBjorn Kristoffersen
Life of this patent
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Abstract
A slow moving electrical machine includes 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 iron cores having windings being arranged alternatingly with iron cores without windings. The machine has 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 |s−p|=2*m and s=12*n*m, where n and m are natural numbers. The machine is constructed and arranged for three phase operation, with serial connection of adjacent windings within a group, with 2*m groups of windings per phase, and with serial or parallel connection of groups of windings.
Claims6
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 |s−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.
Dependencies are inferred from the claim text.