Patent ID: 8482175

Claim:
A permanent-magnet synchronous machine, comprising: a stator; and a rotor located at a distance of an air gap (δ 1 ) from the stator, which rotor is supported in a rotating arrangement on a shaft, whereby a maximum value has been specified for eccentricity between the stator and the rotor, which maximum value is higher than one-tenth of the air gap, whereby magnetization of the synchronous machine is arranged with permanent magnets fitted in the rotor, which are of thickness H in a direction of a magnetic flux and which are used for creating the magnetic flux (φ) which is closed via the stator, the air gap (δ 1 ) and the rotor, wherein between the permanent magnet's thickness H and the maximum value of eccentricity ε it applies a formula: H ≧(10*ε−δ)*μ r , where δ is a dimensioning value of the air gap, and μ r is relative permeability of the permanent magnet.