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
Deadline-driven parallel execution of queries
Method and system for distributing ringback files
Platform for generating electricity from flowing fluid using generally prolate turbine
Electrophoresis display having touch screen and method for driving the touch screen
Copolymer for positive type lithography, polymerization initiator used in production of said copolymer, and composition for semiconductor lithography
Can seam inspection
High damage threshold frequency conversion system
  Randomly Featured Patents
Installation of an optical component in an optical device
Multi-purpose lighter
Oil injection type screw compressor
Objective refractor
Process for generating electric power by means of turbogenerators using high pressure vapor
Combined jewelry component and a cap
Intraocular lens
System and method for speech verification using a robust confidence measure
Recessed rocker switch
Operator messaging within an environment for operating multiple computing systems