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
Particle measurement process and apparatus
Bisphosphonate compounds
Prevention and treatment of oxidative stress disorders by gluthathione and phase II detoxification enzymes
Method and system for Bluetooth low power link layer connection setup
Bipolar transistor with diffused layer between deep trench sidewall and collector diffused layer
Dispensing of restricted goods
Device for maneuvering a vehicle using maneuvering moves using at least one trajectory
  Randomly Featured Patents
Evaporated fuel piping construction for vehicular engines
X-ray microscope
Cephalosporin antibiotics
Stabilized peroxydicarbonate preparation
Non-sequentially configurable IC
Cryostat vacuum chamber
System and method for managing workplace real estate and other resources
Phosphor and including the same, light emitting apparatus, illuminating apparatus and image display
Car body welding assembly system
Medical waste disposal system