Electric motor
AssigneePolestar Magnetronics Inc.
InventorJohn Kaszman
Life of this patent
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Abstract
An electric motor operating on the reluctance principle employs spaced rotor discs presenting rings of inwardly fcing poles of alternating polarity, typically by means of permanent magnets, and an annular stator between the discs consisting of a ring of H shaped cores, with the stems of the H's extending peripherally. Two sets of windings on these cores are energized alternately so as to provide alternating polarization of pole pieces presented by the cores to the rotor discs, with a timing such as to produce continuous rotation at a controlled rate, of the discs as their magnets seek a minimum reluctance position.
Claims8
An electric motor comprising two coaxial rotor discs, spaced apart on a rotational axis of the motor and each exhibiting an annular array of alternating north and south magnetically polarized pole pieces, at a predetermined annular pitch with the like polarized pole pieces in each rotor angularly aligned;
- a stator coaxial with and between said rotors, said stator exhibiting two angularly aligned axially spaced annular arrays of pole pieces at a predetermined pitch equal to the pitch of the rotor pole pieces, arranged so that the annular arrays of pole pieces of the rotor discs can be aligned in close juxtaposition with the pole pieces of the annular arrays of the stator, the stator comprising core members defining said pole pieces such that angularly adjacent pairs of pole pieces in said pole piece arrays of the stator are joined by said core members in an annularly arranged series of H configurations with cross bars of the H configurations extending peripherally of the stator and stems of the H configurations extending parallel to the axis of the motor;
- electrically energizable windings on said cross bars of the H configurations such that energization of said windings polarizes pairs of pole pieces on stems at opposite ends of the cross bars of said H configurations, with the pole pieces on any one stem having like polarization and the pole pieces on neighbouring stems having opposite polarization;
- electrical energy storage means external of said windings;
- and control means, connected between said windings, said electrical energy storage means and connections to a direct current power supply, to control the direction and duration of energization of the windings with reference to the relative angular position of the rotor and stator pole pieces such as to control angular movement of the rotor.
Dependencies are inferred from the claim text.