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
Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation
Method of operating a split gate flash memory cell with coupling gate
Method and system for modifying satellite radio program subscriptions in a mobile vehicle
Methods and systems for automatically identifying a logical circuit failure in a data network
Fluid discrimination device
Evaluating programmer efficiency in maintaining software systems
Multi-domain dynamic group virtual private networks
  Randomly Featured Patents
Linear recliner
Image detection and identification device
Lens apparatus and camera system
Multicast transmission in a cellular network
Liquid crystal display with high aperture ratio
Compliant bonding method
Apparatus for promoting intermixing of heated coolant streams in nuclear reactor
Small size electrical connector assembly
Outdoor antenna system with remote control and method for optimizing antenna function
Spine region of a binder