Three step sequence motor
AssigneeThe Superior Electric Company
InventorsArthur E. Snowdon, Albert Palmero
Life of this patent
Estimating the term…
Abstract
A stepping motor for providing movement in accordance with a repeating three step sequence with the third step being effected by a permanent magnet field and with the other two steps being effected by sequential sole energization of a pair of windings. The third step position constitutes the deenergized rest position of the motor.
Claims11
A motor for producing a plurality of incremental steps of essentially equal extent in each revolution in accordance with a repeating three step sequence comprising a stator and a rotor rotatably supported by the stator;
- said stator having a first energizable means and a second energizable means, each of said energizable means providing when energized a magnetic field with the magnetic field produced by the second means being rotatably displaced one step from the magnetic field of the first means, a third magnetic field producing means for producing a continuous magnetic field rotatably displaced one step from the fields of the first and second energizable means;
- said rotor being positioned for reaction to all magnetic fields and having means for causing it to assume a rotatable position of minimum reluctance where it is rotatably in alignment with the strongest one of said magnetic fields;
- and means for sequentially solely energizing the first and second energizable means to each produce a step of the motor and for maintaining both energizable means de-energized to produce a third step.
A motor for producing a plurality of incremental steps of essentially equal extent in each revolution in accordance with a repeating three step sequence comprising a stator and a rotor rotatably supported by the stator;
- said stator having a first magnetic field producing means comprising a first winding and an interiorly toothed annular means, a second field producing means comprising a second winding and a second interiorly toothed annular means, a third magnetic field producing means comprising a source of continuous magnetism and externally toothed annular means, means for locating each of said field means to locate its magnetic field one step away from each of the others;
- and in which said rotor has a shaft rotatably mounted by the stator and an annular member having an exteriorly toothed periphery and an interiorly toothed periphery mounted on the shaft;
- and means for sequentially independently energizing the first winding or the second winding and for maintaining both windings de-energized to produce a three step sequence movement.
A motor for producing a plurality of incremental steps of essentially equal extent in each revolution in accordance with a repeating plural step sequence comprising a stator and a rotor rotatably supported by the stator;
- said stator having a plurality of magnetic field producing means with there being one magnetic field producing means for each step of the sequence, one of said field producing means comprising a source of continuous magnetism and externally toothed annular means, each of the remainder of said field producing means including a winding and an exteriorly toothed annular means, means for locating each of said field means to locate its magnetic field essentially one step away from each of the others;
- and in which said motor has a shaft rotatably mounted by the stator and an annular member having an exteriorly toothed periphery and an interiorly toothed periphery mounted on the shaft;
- and means for independently energizing each of the windings sequentially and for maintaining all windings de-energized to produce a plural step sequence movement.
Dependencies are inferred from the claim text.