Abstract: Salient-pole shaded pole motors with multiple short circuited shading coils on each pole piece are disclosed wherein the pole pieces extend generally radially from the geometric center of the magnetizable yoke. The pole pieces are interconnected by a magnetic yoke that encompasses the pole pieces as well as a rotor. Adjacent pole tips of pole pieces are displaced in space from one another and are separated by air gaps. Among other things, this facilitates placement of concentrated winding means about the pole pieces. The leading edges or pole tips of the pole pieces exhibit a relatively high reluctance as compared to the center portion or region of the pole pieces. Also disclosed are methods of making multiple shading coil motors. Preferred forms include parallel disposed pairs of shading coils on each trailing pole tip which facilitates manufacture of motors. In addition, all of the coils are preferably made to be the same size in cross section to further facilitate manufacturability.

Abstract: One disclosed motor includes winding leg and yoke laminations that form a core yoke section and a core winding leg (or coil core). An excitation coil is supported on the coil core; and the coil core and core yoke are relatively oriented so that a first surface of the original strip material faces one direction in the core yoke section, and an opposite direction in the winding leg section in a finished motor. The geometrical configuration of the laminations prevent a random location of winding legs relative to yoke laminations, and yet permits two distinctly different relative lamination orientations. A longitudinal reference line along the winding leg is identified and keying or interlocking means are symmetrical about the reference line, but a winding accommodating portion of the winding leg is asymmetrical about the same reference line, so two distinct winding window openings may be provided, depending on the orientation of the winding leg.

Abstract: Salient-pole shaded pole motors with multiple short circuited shading coils on each pole piece are disclosed wherein the pole pieces extend generally radially from the geometric center of the magnetizeable yoke. The pole pieces are interconnected by a magnetic yoke that encompasses the pole pieces as well as a rotor. Adjacent pole tips of pole pieces are displaced in space from one another and are separated by air gaps. Among other things, this facilitates placement of concentrated winding means about the pole pieces. The leading edges or pole tips of the pole pieces exhibit a relatively high reluctance as compared to the center portion or region of the pole pieces. Also disclosed are methods of making multiple shading coil motors.

Abstract: One disclosed method involves punching winding leg and yoke laminations from a strip, subsequently forming a core yoke section, and forming a core winding leg (or coil core). Thereafter, an excitation coil is supported on the coil core, and the coil core and core yoke are assembled in reoriented relation relative to the relative orientation of the laminations when punched from the original strip. The winding leg laminations are reoriented 180 degrees, about a longitudinally extending axis, so that a first surface of the original strip material which faces one direction, as it is punched from the strip, faces an opposite direction in the winding leg section in a finished motor.The geometrical configuration of the laminations prevent a random location of the winding legs relative to the yoke laminations, yet permits two distinctly different relative lamination orientations.

Abstract: Salient-pole shaded pole motors with multiple short circuited shading coils on each pole piece; the pole pieces extending generally radially from the geometric center of the magnetizeable yoke. Pole pieces are interconnected by a magnetic yoke that encompasses the pole pieces as well as rotor. Adjacent pole tips of pole pieces are displaced in space from one another to, among other things, facilitate placement of concentrated winding means about the pole pieces. The leading edges or pole tips of the pole pieces exhibit a relatively high reluctance as compared to the center portion or region of the pole pieces.

Abstract: Salient-pole shaded pole motors with multiple short circuited shading coils on each pole piece; the pole pieces extending generally radially from the geometric center of the magnetizeable yoke. Pole pieces are interconnected by a magnetic yoke that encompasses the pole pieces as well as rotor. Adjacent pole tips of pole pieces are displaced in space from one another to, among other things, facilitate placement of concentrated winding means about the pole pieces. The leading edges or pole tips of the pole pieces exhibit a relatively high reluctance as compared to the center portion or region of the pole pieces.