Patent ID: 7449880
Filing Date: 2008-11-11
Classification: H02P

Abstract:
1. Method for determining the angular position of a rotor in a rotating electric machine, which machine has a stator winding set with at least three stator windings, in which the stator winding set is powered by a converter device, wherein a first voltage (U  is calculated therefor, and a second voltage (U  is calculated therefor, a third voltage (U  is calculated therefor, and a fourth voltage (U  is calculated therefor, a partial rotor position (γ) is calculated from the first, second, third and fourth current gradients the stator voltage (U the cosine angle function of the first stator flux signal (ψ the difference is derived from the cosine angle function of the first stator flux signal (ψ a correction phase angle (ψ