Rotor for a synchronous drive motor of an electrically driven motor vehicle having a plurality of rotor poles, wherein each rotor pole has at least three U-shaped magnetic layers (16, 17, 18) arranged radially one behind the other, and each magnetic layer (16, 17, 18) comprises a series of at least three cavities (10 - 34), of which at least the inner cavities (22, 26, 30, 34) are filled with a permanent magnetic material, and furthermore the two outer cavities (20, 24, 28) are closed in each case by an outer web (48, 50, 52) facing a rotor gap formed by a stator, wherein - the outermost magnetic layer comprises at least one cavity filled with a permanent magnetic material and each other magnetic layer (17, 18) comprises at least two cavities (26, 30) filled with permanent magnetic material, characterized in that - each magnetic layer (16, 17, 18) has an extension of a section of an ellipse (36, 38, 40) respectively having a long axis and a short axis, which substantially coincides with a radial pole axis (d), - wherein the center points of all ellipses (36, 38, 40) lie within the smallest ellipse of the outer magnetic layer, - wherein 1.2 < X i < 4, where X i = a i /b i applies to the ratio of the two axes of all magnetic layers (16, 17, 18), - wherein the ratio of the largest X value to the smallest X value is not more than 1.5, - wherein each cavity belongs to one of the at least three magnetic layers and defines an interface (49+51) in a radial plane, and each of these interfaces (49+51) of a magnetic layer (16, 17, 18) is divided by the associated ellipse (16, 17, 18) into two partial interfaces (49, 51), wherein the surface ratio of each partial interface (49, 51) to an interface (49+51) lies between 1/3 and 3, - wherein webs (56, 46) made from the rotor material are formed between each of the cavities in the second and each additional magnetic layer (17, 18), and these webs (56, 46) are at least twice as wide at the narrowest point as the respective outer webs (50, 52) of the same magnetic layer (17, 18). - the outermost magnetic layer comprises at least one cavity filled with a permanent magnetic material and each other magnetic layer (17, 18) comprises at least two cavities (26, 30) filled with permanent magnetic material, - each magnetic layer (16, 17, 18) has an extension of a section of an ellipse (36, 38, 40) respectively having a long axis and a short axis, which substantially coincides with a radial pole axis (d), - wherein the center points of all ellipses (36, 38, 40) lie within the smallest ellipse of the outer magnetic layer, - wherein 1.2 < X i < 4, where X i = a i /b i applies to the ratio of the two axes of all magnetic layers (16, 17, 18), - wherein the ratio of the largest X value to the smallest X value is not more than 1.5, - wherein each cavity belongs to one of the at least three magnetic layers and defines an interface (49+51) in a radial plane, and each of these interfaces (49+51) of a magnetic layer (16, 17, 18) is divided by the associated ellipse (16, 17, 18) into two partial interfaces (49, 51), wherein the surface ratio of each partial interface (49, 51) to an interface (49+51) lies between 1/3 and 3, - wherein webs (56, 46) made from the rotor material are formed between each of the cavities in the second and each additional magnetic layer (17, 18), and these webs (56, 46) are at least twice as wide at the narrowest point as the respective outer webs (50, 52) of the same magnetic layer (17, 18).