Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Three-phase stepping motor and driving method therefor










Image Number 16 for United States Patent #6160330.

A three-phase stepping motor comprising: a rotation shaft rotatably supported by a pair of bearings provided in predetermined places of a housing so as to be in opposition to each other; a permanent-magnet rotor formed in a cylindrical shape so as to have south (S) and north (N) poles magnetized alternately in the direction of rotation on an outer circumferential portion of the rotor, or an induced magnetization rotor having S and N poles disposed alternately in the direction of rotation which are formed in a manner so that permanent magnets with the same polarity are fitted or formed so as to be identical in polarity at their surfaces in grooves formed parallelly to each other at a regular pitch in a surface of a magnetic body formed to be cylindrical in parallel to the rotation shaft and the cylindrical magnetic body is subjected to induced magnetization to form the S and N poles alternately in the surface of the cylindrical magnetic body; and a stator disposed so as to be in opposition to a surface of one of the rotors through a gap of a predetermined size, the stator having main poles the number of which is a multiple of 3, each of the main pole having a predetermined number of pole teeth and having a stator coil mounted thereon.








 
 
  Recently Added Patents
Hand-held electronic display device
Image forming apparatus and method for making density correction in a low resolution image based on edge determination
Towel clip
Optical scanner and image-forming device
Soliciting first party in communication session to maintain call when degradation of connection to second party is anticipated
Digital display devices and digital projectors with expanded color gamut
Aware manufacturing of integrated circuits
  Randomly Featured Patents
Techniques to transfer information between memory regions
Vacuum cane for picking up articles off the floor
Method and apparatus for detecting friction coefficient of road surface, and method and system for four-wheel steering of vehicles using the detected friction coefficient of road surface
Autostereoscopic display
Method and system of producing phase front distortion
Electrical machine
Ink jet printhead and an armature therefor
N-substituted hydroxypyrimidinone carboxamide inhibitors of HIV integrase
Interactive television application with navigable cells and regions
Method for producing human lactoferrin in plant cell culture