Resources Contact Us Home
Three-phase stepping motor and driving method therefor

Image Number 18 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
Electronic device and control method therein
Negative electrode material for non-aqueous electrolyte secondary battery, method for manufacturing negative electrode material for non-aqueous electrolyte secondary battery, non-aqueous elect
Computing device with improved user interface for applications
Circuit design approximation
Method and apparatus for detection of the remote origin fraction of radon present in a measuring site
Optical sensor and electronic apparatus
Stretchable elastic laminate having increased CD elongation zones and method of production
  Randomly Featured Patents
Indole inhibitors of MDM2 and the uses thereof
Electronic vacuum gauge and systems and methods of calibration and operation of same
Control of marine borers by chlorothalonil
Systems and methods for enabling communications among devices in a multi-cache line size environment and disabling communications among devices of incompatible cache line sizes
Ink tubing chain slider for wide format printer
Rotary disc filter and module for constructing same
Container, lid and clip therefor
Method for pressure measurement
Process for the production of diazonium compounds with a low content of sodium ions
Process for the immobilization and volume reduction of low level radioactive wastes from thorium and uranium processing