This paper presents a magnetic field analysis of surface-mounted permanent magnet (PM) motor using Schwarz-Christoffel (SC) mapping method, taking account any eccentric PM shape and for varied magnetization pattern. Two rotor shapes with radial and parallel magnetization are proposed: The first has a conventional PM shape, while the other has an eccentric PM shape. For that, the calculated magnetic field in the middle of the air-gap using conformal mapping (CM) method and its harmonic content are compared for the four motors. Further, the influence of rotor shape and PM's magnetization on the back EMF and its harmonic content and on the cogging torque and electromagnetic torque is also discussed. Finally, finite-element method (FEM) is used to verify the obtained results, showing good agreement between both methods.