An exemplary permanent-magnet synchronous machine is disclosed with a stator and a rotor located at the distance of the air gap (δ1) from the stator. The rotor is supported on the shaft in a rotating arrangement, and a maximum value has been determined for the eccentricity between the stator and the rotor. The value is higher than one-tenth of the air gap. The magnetization of the synchronous machine is arranged with permanent magnets fitted in the rotor for creating a magnetic flux (φ) which is closed via the stator, the air gap (δ1), and the rotor. A relation H≧(10*ε−δ)*μr applies between the thickness of the permanent magnet and the maximum value of eccentricity ε, wherein δ is the dimensioning value of the air gap and μr is the relative permeability of the permanent magnet.