Linear motor and method to manufacture said linear motor

2- Linear motor as in claim 1, characterised in that said interruptions (21) are made on at least a lateral segment of a relative housing compartment (15).

3- Linear motor as in claim 1, characterised in that said interruptions (21) are made on at least an upper or lower segment of a relative housing compartment (15).

4- Linear motor as in any claim hereinbefore, characterised in that said armature (14) is able to cooperate, in a position behind said coils (16) with respect to the position of said permanent magnets (12), with at least a bar (18) made of ferromagnetic material on which the magnetic circuit, established between said coils (16) and said permanent magnets (12), closes.

5- Linear motor as in claim 4, characterised in that it comprises a supporting plate (25) associated at the rear with said bar (18) made of ferromagnetic material.

6- Linear motor as in claim 5, characterised in that said supporting plate (25) is made of aluminium or its alloys.

7- Linear motor as in claim 5, characterised in that said supporting plate (25) is made of ceramic material.

8- Linear motor as in any claim hereinbefore, characterized in that said armature (14) is able to define casting fissures (19) into which an insulating material in liquid or melted state is cast.

9- Linear motor as in claim 8, characterised in that said insulating material is a polymerizable resin.

10- Linear motor as in claim 1, characterised in that the coils (16) are obtained by substantially continuous winding of a conductor (17).

11- Linear motor as in any claim hereinbefore, characterised in that said armature (14) is able to contain two coils or multiples of two (16a, 16b) adjacent on a plane transverse to the direction of movement and obtained by substantially continuous winding of a conductor (17).

12- Linear motor as in any claim hereinbefore, characterised in that said armature (14) comprises at least a module able to define a plurality of compartments (15) to house respective coils (16) aligned in the direction of movement, the longitudinal development of said module being such as to cover an even number of permanent magnets (12).

13- Linear motor as in claim 12, characterised in that said module comprises a number of coils (16) equal to two or multiples of two.

14- Linear motor as in claim 12, characterised in that said module comprises a number of coils (16) equal to three or multiples of three.

15- Linear motor as in any claim hereinbefore, characterized in that the distance “p” between two adjacent housing compartments (15) is equal to or less than the distance between two adjacent permanent magnets (12).

16- Method to manufacture an electric motor of the type comprising an armature equipped with a plurality of compartments (15) inside which are stably housed respective electric coils (16) and one fixed bar (22) cooperating with one side of said armature, on which are mounted a plurality of permanent magnets (12) arranged, during use, facing said electric coils (16), the method comprising achieving said armature (14) using a body made mainly of aluminium or its alloys or of ceramic material, said body being able to define a plurality of compartments (15) housing respective coils (16), an insulating and binding material (20) such as a polymerizable resin being then cast in its liquid or melted state into fissures (19) defined on the perimeter of said armature (14) which thus functions as a mold for the casting and polymerization of said insulating and binding material (20).

17- Method as in claim 16, characterised in that said polymerization is performed cold.

18- Method as in claim 16, characterised in that said polymerization is performed hot.