Resources Contact Us Home
Stepper motor

Image Number 5 for United States Patent #5448117.

A stepper motor includes a stator with magnetic poles extending radially outward from a central core to form segments of an outer stator surface, an armature ring fitting loosely over the stator, and a rotor with a drive plate rotationally driven by rollers extending from the armature ring into apertures in the drive plate. Current is supplied, according to a sequence, through coils surrounding each magnetic pole, so that the armature ring, being sequentially attracted to adjacent magnetic poles, moves around the stator with a modified orbital motion including an orbital motion, in which the ring is translated around a circular path, and a rotational motion. The stepper motor may also include a stationary cam plate with a number of peripheral notches, into which the rollers are moved individually by the orbital motion.

  Recently Added Patents
Dynamically reconfigurable systolic array accelorators
Circuit device for preventing radiation emission in portable terminal with two cameras
Tranverse in-core probe monitoring and calibration device for nuclear power plants, and method thereof
Method and apparatus for representing sensory effects and computer readable recording medium storing user sensory preference metadata
Television with a stand
Magnetic memory and method of manufacturing the same
Location estimation of wireless terminals through pattern matching of deduced signal strengths
  Randomly Featured Patents
Electrical switch keypad
Basket design and means of attachment for horizontal air preheaters
ATM cell transmit priority allocator
Method of using a substrate with magnetic substance of a magnetic scale
Methods of treating diabetes using carnitine conjugates as dual prodrugs
Decorative laminate
Ferrite for high-frequency applications and manufacturing method thereof
Deployable member for use with an intervertebral cage
Apparatus and methods for impingement cooling of an undercut region adjacent a side wall of a turbine nozzle segment
Thrower of transported materials