ELECTRIC MOTOR, HOISTING MACHINE AND ELEVATOR SYSTEM

The invention relates to an electric motor of for example a hoisting machine. The electric motor (l) according to the invention comprises a stator (4), which stator comprises slots (5), into which slots a concentrated winding (6) is fitted. The electric motor also comprises a rotating rotor (2), which rotor (2) comprises permanent magnets (3a, 3b) placed consecutively in a ring (12) in the direction of the rotational movement. The ratio (L M /L p ) of the width of a permanent Lp magnet (3a, 3b) at the center line (12) of the magnet and the width (L p ) of a magnetic pole of the rotor is at least 2/3 and at most 4/5. Further, and the direction of at least one side of at least one permanent magnet (3a, 3b) on the rotor differs from the direction of the stator s slot (5) with a slot inclination (s), the ratio s L P of which slot inclination (s) and the width (L P ) of a magnetic pole of the rotor is at least 5 36 and at most 1 5 .