Rotor for an electric machine, the rotor comprising: - a rotor body, formed by a stack of laminations, which is preferably placed on a rotor shaft; - N pairs of magnetic poles, each magnetic pole being composed of at least three magnets which are positioned in axial voids; and - three asymmetric flux barriers which make up each magnetic pole, which include one outer flux barrier, one centre flux barrier and one inner flux barrier, each flux barrier (9, 10, 11) comprising two inclined voids that are positioned on either side of each axial void, the two inclined voids forming an opening angle (θ1, θ2, θ3) between them which corresponds to the angle between two straight lines (Δ1, Δ2) each passing through the centre C of the rotor and through a midpoint positioned on an outer face of the respective voids of each flux barrier (9, 10, 11); - magnets in the inclined voids of at least one flux barrier (9, 10, 11) of each magnetic pole; - N primary magnetic poles each composed of an inner flux barrier comprising an opening angle (θ1), a centre flux barrier comprising an opening angle (θ2) and an outer flux barrier comprising an opening angle (θ3), such that the opening angles (θ1, θ2, θ3) satisfy at least two of the following three equations: θ1=(0.946 +/- 0.014) × P, θ2=(0.711 +/- 0.014) × P, θ3=(0.508 +/- 0.014) × P; - N secondary magnetic poles each composed of an inner flux barrier comprising an opening angle (θ1), a centre flux barrier comprising an opening angle (θ2) and an outer flux barrier comprising an opening angle (θ3), such that the opening angles (θ1, θ2, θ3) satisfy at least two of the following three equations: θ1=(0.776 +/- 0.014) × P, θ2=(0.564 +/- 0.014) × P, θ3=(0.348 +/- 0.014) × P, each secondary pole alternating with a primary pole and where - P is the pole pitch of said rotor defined in degrees by P = 360 2 × N. - a rotor body, formed by a stack of laminations, which is preferably placed on a rotor shaft; - N pairs of magnetic poles, each magnetic pole being composed of at least three magnets which are positioned in axial voids; and - three asymmetric flux barriers which make up each magnetic pole, which include one outer flux barrier, one centre flux barrier and one inner flux barrier, each flux barrier (9, 10, 11) comprising two inclined voids that are positioned on either side of each axial void, the two inclined voids forming an opening angle (θ1, θ2, θ3) between them which corresponds to the angle between two straight lines (Δ1, Δ2) each passing through the centre C of the rotor and through a midpoint positioned on an outer face of the respective voids of each flux barrier (9, 10, 11); - magnets in the inclined voids of at least one flux barrier (9, 10, 11) of each magnetic pole; - N primary magnetic poles each composed of an inner flux barrier comprising an opening angle (θ1), a centre flux barrier comprising an opening angle (θ2) and an outer flux barrier comprising an opening angle (θ3), such that the opening angles (θ1, θ2, θ3) satisfy at least two of the following three equations: θ1=(0.946 +/- 0.014) × P, θ2=(0.711 +/- 0.014) × P, θ3=(0.508 +/- 0.014) × P; - N secondary magnetic poles each composed of an inner flux barrier comprising an opening angle (θ1), a centre flux barrier comprising an opening angle (θ2) and an outer flux barrier comprising an opening angle (θ3), such that the opening angles (θ1, θ2, θ3) satisfy at least two of the following three equations: θ1=(0.776 +/- 0.014) × P, θ2=(0.564 +/- 0.014) × P, θ3=(0.348 +/- 0.014) × P, each secondary pole alternating with a primary pole and where - P is the pole pitch of said rotor defined in degrees by P = 360 2 × N.