초록 ▼

A single phase stepper motor is formed of a rotor having a shaft carrying a driving pinion and a permanent magnet and a stator having a body of diamagnetic or paramagnetic material, a field winding producing an excitation field transverse to the axis of the rotor shaft and a pair of diametrically op

A single phase stepper motor is formed of a rotor having a shaft carrying a driving pinion and a permanent magnet and a stator having a body of diamagnetic or paramagnetic material, a field winding producing an excitation field transverse to the axis of the rotor shaft and a pair of diametrically opposed auxiliary poles spaced from the excitation field. The permanent magnet is constructed of a lanthanide ferromagnetic alloy, such as a lanthanide cobalt alloy and preferably a samarium cobalt alloy; and the permanent magnet has a moment of inertia substantially the same as or less than the moment of inertia of the combination of the rotor shaft and the driving pinion. The stator body has a plurality of pairs of holes therein for supporting a U-shaped, rod-like member having ends forming the auxiliary poles in a plurality of positions to permit adjustment of the direction of rotation and torque of the rotor.

대표청구항 ▼

A single phase stepper motor comprising stator means including a body of diamagnetic or paramagnetic material, a field winding disposed in said body for producing an excitation field, and two diametrically opposed auxiliary poles spaced from said excitation field; rotor means including a shaft carry

A single phase stepper motor comprising stator means including a body of diamagnetic or paramagnetic material, a field winding disposed in said body for producing an excitation field, and two diametrically opposed auxiliary poles spaced from said excitation field; rotor means including a shaft carrying a driving pinion and a bipolar permanent magnet; and bearing means rotatably supporting said rotor means in said stator body with the axis of said rotor shaft transverse to the direction of said excitation field, said permanent magnet being constructed of a lanthanide ferromagnetic alloy and having a moment of inertia substantially the same as or less than the moment of inertia of the combination of said rotor shaft and said driving pinion.