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
Power management systems and designs
Techniques for determining optimized local repair paths
Viruses lacking epithelial cell receptor entry
Multi-level integrated circuit, device and method for modeling multi-level integrated circuits
Generating and using checkpoints in a virtual computer system
System for purifying air through germicidal irradiation and method of manufacture
System and method for internet based procurement of goods and services
  Randomly Featured Patents
Water-soluble wire enamel
Method for distributing data packets in a mobile node network and associated node
Thermal flowmeter having improved durability against thermal stress
Disk reproducing speed control method and a disk reproducing apparatus using this method
Objective lens drive apparatus with objective lens portion movable along support member axial direction
Preventing blur caused by motion of the subject in a digital image
Semiconductor device
Coordinate input system and display apparatus
Low styrene emission vinyl ester resin for fiber-reinforced applications
Air cleaner and dryer