Variable reluctance stepper motor

摘要

A variable reluctance stepper motor includes an energizable first stator cooperative with a first rotor for imparting incremental motion to the rotor and a second stator generating a permanent magnetic field and a second rotor cooperative therewith to restrain the rotor from drift rotation upon deenergization of the first stator. The second stator-second rotor combination defines positions of minimum magnetic reluctance radially angularly coincident with those provided by the first stator-first rotor combination. A lead screw is displaced rectilinearly to provide a linear output according with rotor shaft rotation.