Control of a rotating electric machine

A system for determining control parameters of a rotating electric machine, including:

• a two-phase imaginary reference frame module configured to construct two imaginary two-phase signals (xα, xβ) based on a measurement of the mechanical position θmeca of the axis of a rotor of the rotating machine received from a position sensor,
• an open-loop module configured to:
• generate two pulse signals at the zero crossings of said imaginary two-phase signals (xα, xβ);
• determine a preliminary estimate of an electrical speed, said preliminary electrical speed ωest, from the sum of said two pulse signals and an electrical frequency fmax associated with a rotational speed;
• and determine an open-loop estimated electrical speed ωestflt by applying a selective band-pass filter on said preliminary electrical speed ωest, and
• a phase-locked loop module configured to generate the actual electrical position θ of the rotating machine from said two imaginary two-phase signals (xα, xβ) and using said open-loop estimated electrical speed ωestflt received from the open-loop module.