Resources Contact Us Home
Method and apparatus for harmonics suppression in motor systems

Image Number 8 for United States Patent #4629916.

A polyphase synchronous motor having a relatively large number of poles, constructed for substantial elimination of all significant harmonics. Harmonics are eliminated by dividing the motor into two symmetrical groupings, each a complete motor, then rotating one grouping relative to the other by an angle .pi./h electrical degrees, where h is the order of the harmonic being suppressed. Also, with a permanent magnet disc rotor, the magnet poles on one face of the disc can be rotated relative to those of the other face in the same manner, to suppress a harmonic.

  Recently Added Patents
Method for configuring analog-to-digital converter keys and non-transitory machine readable medium storing program code executed for performing such method
Creating three dimensional graphics data
Optimized control of an energy supplying system and an energy consuming system
Cucumber plants with a compact growing habit
Prevention and reduction of blood loss
Methods of implanting dopant ions
  Randomly Featured Patents
Method and system for compression of files for storage and operation on compressed files
Method for determining measuring points on a workpiece and a measuring system therefor
Electronic calendar collaboration
Surface pulse system for injection wells
Bicycle passenger peg
Method and apparatus for reducing metal-oxygen compounds
Self-leveling and height control hydraulic system
Circuit and method for suppressing gate induced drain leakage
Process for the preparation of 4-dihalomethyl-3-oxabicyclo[3.1.0]hexan-2-ones