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
Non-intrusive processor tracing
Method and/or apparatus for navigating mobile robot using virtual sensor
Dual use photovoltaic system
Television receiver
Prioritizing application data for transmission in a wireless user device
Maize hybrid X08B748
Aperture stop
  Randomly Featured Patents
Method of manufacturing a base
Pocket case for mobile communications devices combined with carrying compartment for credit card sized items
Electric power steering device
Key switch
Cytotoxic ribonuclease variants
Stock assembly with recoil suppression
Cycle pump holder
One-hand locking and releasing handheld medical instrument
Flow synthesis of quantum dot nanocrystals
Preparing polyolefins with a narrow particle size distribution and catalyst therefor