Method and apparatus for producing a coil winding for stators or rotors of electrical machines, and stator or rotor produced thereby

Abstract

A method for producing a coil winding for stators is described, in which each coil turn rests, with one fillet () each, in two stator slots, and the two fillets () are joined by a head portion (). A plurality of coil turns are made simultaneously by winding up n parallel wires () with intermediate spacing onto a rotatable former (). To obtain small winding heads, alternatingly in a work step A, one fillet () and the wire length of one head portion () are made from each of the parallel wires () on the former (). Then in a work step B, the resultant fillets () together with the adjoining first end of the respective associated head portions (), and the wire guide together with the second end of these head portions (), are displaced relative to one another along the former () by n times the intermediate spacing of the wires (). After work steps A and B have been repeated multiple times, the fillets () for the last n stator slots are then also made on the former (). Next, the winding is removed from the former, pressed flat, and placed in a striplike coil holder. From there it is transferred into slots of a rotorlike transfer tool that are open radially outward, and from there it is finally positively displaced radially outward into the stator slots.