Abstract: A synchronous motor with permanent magnets includes a rotor (110) provided with permanent magnets, and a winding (120) formed by overlapping coils located inside a slotless stator (100). The winding coils (120) are regularly distributed all around the 360° of the inside surface of the stator (100) and the ends of the coils are designed such that the winding has the same thickness throughout and the ends of the winding are at least partially inside the slotless stator (100).

Abstract: The present invention relates to synchronous motor comprising a cylindrical rotor (4) provided with permanent magnets (3) located inside a cylindrical stator provided with a winding (U, V, W), characterized in that the rotor is provided with protuberances (41) facing the said winding.

Abstract: A method for manufacturing a cylindrical winding for slotless electrical machine according to the following steps: a) a winding head (211) able to move according to three axes X, Y, Z, winds continuously a wire following a predetermined winding program around two sets of needles (80) on the external surface of a first cylindrical tube (6). The needles are located on the conical shaped end surfaces of two identical cylindrical bodies axially juxtaposed and axially and rotatable movable (R). The cylindrical bodies are partially located inside the first cylindrical tube (6), b) after the achievement of the winding operation of all the electrical machine phases all around the 360° peripheral surface of the first cylindrical tube (6) a second cylindrical tube is put around the achieved winding (41); c) the two sets of needles (80) are taken away and the two cylindrical bodies are axially moved away.

Abstract: The present invention relates to an alternating-current-synchronous-servomotor having a disk-shaped rotor (55, 56) which is located between two stator halves. The rotor comprises an even number of flat permanent magnets pieces (56) having magnet field lines extending parallel to the shaft of the rotor. The permanent magnet pieces (56) form an annular like series including interstices extending around a hub (55) supported on the shaft. The magnet pieces are made of a magnetically non-conductive material and have flat sides acting as magnetic pole surfaces (N, S) which extend in parallel planes to which the axis of the shaft extend perpendicularly. The permanent magnet pieces (56) have limiting surfaces located radially inwards, which are supported each on one of peripheral planes of the hub (55). Said peripheral planes and said limiting surfaces comprise cooperating means (57, 58, 59, 60) for fixing said magnet pieces (54) on said hub (55).

Abstract: The invention relates to a method for manufacturing a cylindrical winding for slotless electrical machine according to the following steps: a) a winding head moving according to three axes X, Y, Z, winds continuously a wire following to a winding program around two set of needles and on the external surface of a first cylindrical tube said needles being located on the conical shaped end surfaces of two identical cylindrical bodies, partially located inside said cylindrical tube, axially juxtaposed and axially and rotatable movable, b) after the achievement of the winding operation of all the electrical machine phases all around the 360° peripheral surface of said first cylindrical tube a second cylindrical tube is put around the achieved winding; c) said two sets of needles are taken away and the two cylindrical bodies are moved away.

Abstract: The present invention relates to synchronous motor comprising a cylindrical rotor (4) provided with permanent magnets (3) located inside a cylindrical stator provided with a winding (U, V, W), characterized in that the rotor is provided with protuberances (41) facing the said winding.

Abstract: The invention relates to a synchronous motor with permanent magnets comprising a rotor (110) provided with permanent magnets a winding (120) formed by overlapping coils located inside a slotless stator (100), characterized in that the winding coils (120) are regularly distributed all around the 360° of the inside surface of the stator (100) and in that the ends of the coils are designed so as the winding has the same thickness throughout and in that the ends of the winding are at least partially inside the slotless stator (100).

Abstract: The present invention relates to a grooved part of an electric motor with permanent magnets. The grooved part is made of an interior ring (5) formed by a closing ring (8), teeth (7), and an exterior ring (10). Said closing ring, teeth, and exterior ring (10) are made by sintering, and further comprising winding of wires (12) around said teeth (7). The grooved part may be either the stator or the rotor of the motor.