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
Call admission control method and system
Media processing method and device
Web-based system and method for video analysis
Nucleic acid sequences encoding secE/sec61-gamma subunits of protein translocation complexes
Power supply apparatus for light emitting diode
Motion compensated overlay
Interface circuit and interface system
  Randomly Featured Patents
Method for making a Z-fold signature
Method and apparatus for setting a desired deceleration of a vehicle
Device for reconfiguring a faulty storage assembly
Frame synchronizer having a write-inhibit circuit
Backlash-compensating toothed moving part, gear assembly and use of this gear assembly
Pressure transducer
Composite thermal dye transfer ID card stock
Pattern recognition system
Automotive dress air freshener for attachment to rear view mirror
Surgical instrument handle