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










Image Number 10 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
Fan guide
Wireless communication system, associated methods and data structures
Method and apparatus of motion vector prediction with extended motion vector predictor
Compatibility check
Trimming circuit and semiconductor device
Substrate and patterning device for use in metrology, metrology method and device manufacturing method
Message processing method and apparatus based on the SIP protocol and an IP communication system
  Randomly Featured Patents
Ceramic-metal composite and method to form said composite
Orthotic garment and method
Method and system for optical multichannel transmission using coherence division multiplexing with optical filtering
Emergency tower escape system for a building having multiple floors
Container for transporting temperature sensitive materials
Image recording apparatus
Cryogenic construction and article therefor
Method and apparatus to remove data outliers, produced by external disturbance, in internally measured signals in an implantable cardiac stimulator
Industrial computer
Guitar