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An apparatus which reduces magnetic cogging between a rotor and stator of an electrical motor or generator. The stator is divided into pairs of angular pie-shaped segments, one member of each pair being shifted angularly with respect to the other member of the pair a distance equal to one-half of on

An apparatus which reduces magnetic cogging between a rotor and stator of an electrical motor or generator. The stator is divided into pairs of angular pie-shaped segments, one member of each pair being shifted angularly with respect to the other member of the pair a distance equal to one-half of one pole pitch. This places the teeth of a shifted stator segment between the alternating magnetic poles of the rotor while the teeth of the unshifted segment are directly opposite the poles. When the rotor is moved, the reluctance torque, or magnetic cogging due to one member of a pair, virtually cancels the reluctance torque of the other member of the pair.

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An apparatus for reducing magnetic cogging in an electrical motor comprising: a plurality of magnetic poles, each having a defined pole pitch; means to support said poles in at least two annular configurations wherein said poles are arranged with substantially alternate polarity within each annular

An apparatus for reducing magnetic cogging in an electrical motor comprising: a plurality of magnetic poles, each having a defined pole pitch; means to support said poles in at least two annular configurations wherein said poles are arranged with substantially alternate polarity within each annular configuration and the configurations overlie one another so that they have a common central axis, said annular configurations are identical rotatable rotors of even number with poles of the same polarity registered; a magnetic flux carrier including a magnetic material disposed in spaced concentric relation within each of said annular configurations, and being supported by axial bearings to allow relative rotation between each carrier and respective annular configuration about said axis; the angular position of the magnetic material and at least one flux carrier being displaced angularly relative to the magnetic material and at least one other flux carrier so that the magnetic cogging between the annular configurations surrounding the displaced flux carrier and the magnetic material of the displaced flux carrier, is opposed by the magnetic cogging between the annular configuration surrounding the non-displaced flux carrier and the magnetic material of the non-displaced flux carrier, said flux carriers are cylindrical, each flux carrier having an equal number of teeth each having a defined tooth pitch and being shaped from the magnetic material and regularly spaced around the external circumference of the cylinder and wherein the flux carriers are paired, with the first member of each pair being angularly displaced relative to the second member of each pair so that the teeth of each first member are registered with the space between the teeth of the second member of the same pair, with the angular distance between the centers of adjacent poles being one pole pitch, and wherein there are three pairs of flux carriers and the first member of each pair is angularly displaced through a distance equal to one-third of two pole pitches with respect to the first member of all other pairs, and the second member of each pair is displaced through a distance equal to one-half of one pole pitch with respect to the first member of the same pair; the magnetic material of the flux carriers is shaped to receive coils so that if a variable current signal is established in the coils said relative rotation will occur; the ratio of the span of each of said tooth pitch and to said pole pitch being about 1:1.