Preformed Coil to Produce a Self-Supporting Air Gap Winding, in Particular Oblique Winding of a Small Electrical Motor

摘要

A preformed coil (20) to produce a self-supporting air-gap skewed winding of a small electric motor consisting of at least two preformed coils (20) positioned overlapping on a circumference of a winding (6) and a method and device for producing the coil. Two preformed coil sides (24a, 24b) lying in different radial planes are formed which are connected on their front ends (26a, 26b) by front connections. The front connections feature the radial plane offset from the winding offset sections (28) bridging the preformed coil sides (24a, 24b). The preformed coil sides (24a, 24b) are formed curved with a circular shape around a longitudinal axis (16), and the radius of curvature of the one radial outer preformed coil side (24a) is greater than the radius of curvature of the radial inner preformed coil side (24b).

主权项

1. A preformed coil (20) to produce a self-supporting air-gap skewed winding (6) of an electric motor (1) having at least two preformed coils (20) positioned overlapping on a circumference of the winding (6) comprising at least one winding (30) of an electrically conducting wire element (22), wherein a radial inner preformed coil side and a radial outer preformed coil side lying in different radial planes are constructed which are connected with each other at first and second front ends (26a, 26b) via front connections, wherein the front connections have winding offset sections (28) bridging the preformed coil sides (24a, 24b), and the preformed coil sides (24a, 24b) are curved in a circular arc shape around a longitudinal axis (15) of the winding (6), and a first curvature radius (R1) of the radial outer preformed coil side (24a) is greater than a second curvature radius (R2) of the radial inner preformed coil side (24b).