AXIAL ELECTRIC MOTOR

Abstract

An axial electric motor which comprises a rotor (1) with a shaft (2) and a set of electromagnetic coils (3) situated between discs (4) of polarized magnets (5) which, in the manner of a stator (6), create the magnetic field which causes said coils (3) to rotate and with said coils, the shaft (2), each coil (3) being wound, to a steel core (7) which has a structural configuration which allows said cores (7) to be placed radially, forming a circle around the shaft (2) with a small spacing (8) therebetween and with the wires (31) of the winding arranged in a plane perpendicular to the longitudinal line of the shaft (2) and parallel to the discs (4).

Claims

1. An axial electric motor comprising a rotor (1) with a shaft (2) and a set of electromagnetic coils (3) situated between discs (4) of polarized magnets (5) which, in the manner of a stator (6), create the magnetic field which causes said coils (3) to rotate and with said coils, the shaft (2), is characterized in that the coils (3) are each wound, to a core (7) formed of steel which has a structural configuration which allows the core (7) to be placed radially, forming a circle around the shaft (2) with a small spacing (8) therebetween and with the wires (31) of the winding arranged in a plane perpendicular to the longitudinal line of the shaft (2) and parallel to the discs (4).

2. The axial electric motor according to claim 1, characterized in that the cores (7) of the coils have a trapezoid base shape.

3. The axial electric motor according to claim 1, characterized in that the core (7) is interchangeable with another core.

4. The axial electric motor according to claim 3, characterized in that the core (7) is fixed to the rotor (1) by screws (9).

5. The axial electric motor according to claim 4, characterized in that the core (7) is fixed by two screws (2) which pass through the core longitudinally and thread into at least one exterior ring (10) provided for such purpose.

6. The axial electric motor according to claim 5, characterized in that the core (7) is also fixed in an interior ring (11).

7. The axial electric motor according to claim 6, characterized in that the interior ring (11) to which the core (7) is fixed is a non-magnetic ring for the spacing of the shaft (2) to the coils (3).

8. The axial electric motor according to claim 1, characterized in that the core (7) has a transverse cross section in the form of a double T which determines two wide bases, upper and lower (71) with a narrower central trunk (72) in which the winding of the wires (31) of the coil (3) is implemented.

9. The axial electric motor according to claim 1, characterized in that the shaft (2) is equipped with holes (12) for ventilation and for passing cables which are combined using means for guiding the two-way ventilation.

10. The axial electric motor according to claim 9, characterized in that the means for guiding the ventilation are determined by vanes (13) incorporated into segments (14) into which the shaft (2) is divided at least in the region of the coils (3).

11. The axial electric motor according to claim 10, characterized in that the vanes (13) are arranged distributed along the entire perimeter of each segment (14) of shaft (2), all of the vanes (13) in the same segment (14) being directed in the same direction and, in adjacent segments (14), being directed in opposing directions.

12. The axial electric motor according to claim 1, characterized in that a group of coils (3) between two discs (4) of magnets (5) is coupled to the shaft (2).

13. The axial electric motor according to claim 1, characterized in that two groups of coils (3) are coupled to the shaft (2), each one of the two groups of coils (3) arranged between respective pairs of discs (4) of magnets (5).

Description

DESCRIPTION OF THE DRAWINGS

[0024] In order to complement the description being made and with the object of helping to better understand the characteristics of the invention, in accordance with a preferred practical embodiment thereof, said description is accompanied, as an integral part thereof, by a set of drawings where, in an illustrative and non-limiting manner, the following has been represented:

[0025] FIG. 1 shows a schematic elevated lateral view of the main parts of an example of the axial motor according to the invention specifically the shaft, the coils and the discs with magnets, the configuration and arrangement of the same being seen.

[0026] FIG. 2 shows a plan view of the same set of pieces of the motor of the invention shown in the preceding figure, the vertical shaft should be understood represented in this case with the exception of the discs and including the fixing screws of the coils, the trapezoid configuration of the cores thereof and the radial arrangement thereof around the shaft being seen.

[0027] FIG. 3 shows a plan view of one of the cores of the coils which comprises the motor of the invention, represented with the screws which pass through it for the fixing thereof, the trapezoid configuration of the upper and lower bases thereof being seen.

[0028] FIGS. 4, 5, 6 and 7 show views, respectively in lateral elevation, frontal and rear elevations and perspective view of the same exemplary core for the coils which the motor according to the invention has, represented in said figures without the winding of the coil and without fixing screw, the trapezoid configuration and double T section thereof being seen;

[0029] FIG. 8 shows a perspective view of the core of the coils which the motor of the invention has, in this case represented with the winding of the coil wound to the same on the double T section of the trunk thereof;

[0030] FIGS. 9 and 10 show views, in transverse cross section and in perspective of respective sections of the shaft in which the incorporation of holes and ventilation vanes arranged in opposing directions are seen; and

[0031] FIG. 11 shows a sectional view of another exemplary configuration of the motor of the invention, in this case an example of multiple motors with double set of coils and magnetic discs.

PREFERRED EMBODIMENT OF THE INVENTION

[0032] In view of the mentioned figures, and in accordance with the numeration adopted, non-limiting examples of the axial electric motor of the invention may be seen in said figures, said motor comprises the parts and elements which are indicated and described in detail below.

[0033] Thus, as is seen in FIG. 1, the motor in question, in addition to other components common to any axial three-phase electric motor which are not represented in the figures, comprises, in a known manner, a rotor (1) with a shaft (2) and a set of electromagnetic coils (3) situated between two discs (4) of polarized magnets (5) which, in the manner of a stator (6), create the magnetic field which causes said coils (3) to rotate and with said coils, the shaft (2), where said set of coils (3) are each wound, in an innovative manner, to a steel core (7) which has a structural configuration which allows said cores (7) placed radially around the shaft (2) and with the wires (31) of the winding arranged in a plane perpendicular to the longitudinal line of the shaft (2) and parallel to the discs (4).

[0034] As is observed in FIG. 2, the cores (7) of the coils (3) have a trapezoid base shape owing to which the set of the same form a circle around the shaft (2), a small spacing (8) existing between them.

[0035] These cores (7) are interchangeable since they are fixed to the rotor (1) by means of screws (9). Each core is preferably fixed by means of two screws (9) which pass through it longitudinally and thread into securing rings (10, 11) provided for such purpose; in at least one exterior ring (10) and optionally also in an interior ring (11) which is preferably a non-magnetic interior ring for the spacing of the shaft (2) to the coils (3).

[0036] Concerning the FIGS. 3 to 8, it is seen how the cores (7) of the coils (3), in addition to having the trapezoid base shape, which makes them wider at the external side thereof than at the internal side and allows the radial arrangement thereof, forming the mentioned circle around the shaft (2), they have a transverse cross section in the shape of double T which determines two wide bases, upper and lower, (71) with a narrower central trunk (72) in which the winding of the wires (31) of the coil is implemented, said bases (71) being passed through longitudinally by respective holes (73) in order to insert the fixing screws (9).

[0037] Furthermore, the shaft (2) of the rotor (1) is equipped with a plurality of holes (12) for ventilation and for the passage of cables, holes (12) which are combined with means for guiding the two-way ventilation which optimizes the effectiveness thereof.

[0038] It should also be noted that said guide means of the ventilation are determined by the existence of a series of vanes (13) incorporated into segments (14) in which the shaft (2) is divided at least in the region of the coils (3), the vanes (13) of which are arranged distributed along the entire perimeter thereof, all the vanes (13), in a same segment (14), being directed in the same direction and, in adjacent segments (14), directed in opposing direction as is observed in FIGS. 9 and 10.

[0039] In FIG. 11, an exemplary alternative arrangement of the motor of the invention has been represented, where the shaft (2) of the rotor (1), instead of a group of coils (3) situated between two discs (4) of magnets (5) which would be the simple preferred embodiment shown in FIG. 1, envisages both groups of coils (3) interposed between respective pairs of discs (4) of magnets (5). Spacers (15), the body (16) of the motor and bearings (17) have also been included in this example, it should be indicated that the arrangement of said shaft (2) may also be variable according to the requirements of each case.

[0040] With the nature of the present invention sufficiently described as well as the manner of putting it into practice, it is not considered necessary to explain it further for a person skilled in the art to understand the scope thereof and the advantage derived therefrom, it must be stated that, within its essence, it may be put into practice in other embodiments which differ in detail from that indicated by way of example and to which the protection sought likewise extends, provided that the fundamental principle thereof is not altered, changed or modified.