Patent ID: 8638012

Claim:
A rotor for a synchronous reluctance machine, a cross-section of the rotor comprising: four pole sectors arranged symmetrically about a central aperture of the cross-section, each pole sector comprising a plurality of insulating barriers, each insulating barrier extending between two pitch points, a plurality of q-axes, each q-axis defining a direction of maximum reluctance of the corresponding pole sector, a perimeter defining the outer contour of the cross-section, a plurality of reference points located on the perimeter symmetrically with regard to the q-axes, the angular intervals between the reference points defining reference angles which between two circumferentially adjacent q-axes have an equal value of α m =γ/(k−1), where γ is an angle between two pitch points that are furthest apart between two circumferentially adjacent q-axes and k is the number of pitch points between two circumferentially adjacent q-axes, a q-axis pitch angle defined by an angular distance δ between two circumferentially adjacent pitch points on opposite sides of a q-axis, the q-axis pitch angle having a value which is different from δ=3*α m , the angular positions of each pitch point and the reference point closest to that pitch point have a deviation having a value Δ T less than 2.5 degrees, characterized in that the q-axis pitch angle has a value δ 50 degrees or less.