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AssigneeWilo SE
InventorsDaniel HOEKE, Oliver DRUBEL, Henry KOHLER, Roland Edmund UMMELMANN, Heiko DOEHLER, Heiko UNGER, Volker NETSCH, Michael MEIER-WAGNER, Martin VOGT
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Provided are a method and a tool for manufacturing a coil assembly of an electric motor for a deep well vertical turbine pump with a stator assembly that has a stator bore to receive a rotor and slots radially open to the inside which are respectively separated from each other by a stator tooth and in which electrical conductors of coils of the coil assembly lie, forming distributed windings and, at one axial end of the coil assembly, a winding head. The coil assembly is manufactured by shaping and encapsulating the coils within the tool so that the winding head extends only between an inner diameter and an outer diameter that is smaller than the diameter of the stator bore in order to enable axial insertion of the coil assembly into the stator assembly leading with the winding head in which the coils are respectively wound individually, drawn into the tool as wire bundles and encapsulated within it.
A method for manufacturing a coil assembly of an electric motor for a deep well vertical turbine pump having a stator assembly that has a stator bore configured to receive a rotor and slots radially open to inside the stator bore, and separated from each other by respective stator teeth, electrical conductors of coils of the coil assembly lying in the slots, forming distributed windings and, at one axial end of the coil assembly, a winding head, wherein the coil assembly, by shaping and encapsulating of the coils within a tool, is manufactured so that the winding head extends only between an inner diameter and an outer diameter that is smaller than a diameter of the stator bore thereby enabling axial insertion of the coil assembly into the stator assembly leading with the winding head, in which the coils are respectively wound individually, drawn into the tool and encapsulated within it.
The method according to claim wherein by locking rods of a locking mechanism having a number of locking rods corresponding to the number of longitudinal cavities are moved into the longitudinal cavities, axially, thereby to close the longitudinal cavities to form a casting mould.
A tool for manufacturing a coil assembly of distributed windings configured for axial insertion into a stator assembly of an electric motor, the stator assembly having slots radially open to inside the bore, and separated from each other by respective a stator teeth, comprising a winding support having a central guide cylinder and fins, corresponding in number to the stator teeth, arranged at a distance from the central guide cylinder so that there is an annular space between the central guide cylinder and the fins that is open in an axial direction towards an insertion end to receive at least one coil wound in a form of a wire bundle and to form a winding head segment of the coil in the annular space, a respective longitudinal cavity being situated between each two fins adjacent to each other in a circumferential direction in order to form a respective one longitudinal coil segment of the coil.
Dependencies are inferred from the claim text.