Resources Contact Us Home
Permanent magnet brushless machine with magnetic flux regulation

Image Number 9 for United States Patent #8148867.

A permanent magnet machine (PMM) has a generally cylindrical permanent magnet (PM) rotor that has multiple PM rotor poles arranged around a rotor axis of rotation; and a stator with two generally cylindrical and concentric yokes, an inner yoke proximate the PM rotor with associated multiple inner poles and inner armature windings suitable for multiphase alternating current operation that form a PMM magnetic flux circuit, an outer yoke with associated multiple outer poles and outer control windings suitable for connection to a direct current source, with distal ends of the outer poles in contact with the inner yoke to form an external magnetic flux circuit that diverts magnetic flux from the PMM magnetic flux circuit; wherein application of increasing direct current to the outer windings results in increased magnetic reluctance of the external magnetic flux circuit, thereby causing the external magnetic flux circuit to divert less magnetic flux from the PMM magnetic flux circuit.

  Recently Added Patents
Liposomes with improved drug retention for treatment of cancer
Pipe coupling
Reflective non-invasive sensor
End to end email monitor
Antenna array system
Method of making a CIG target by spray forming
Music composition automation including song structure
  Randomly Featured Patents
Silencer for gas discharge devices
Boom with mast assembly
Protection against mite contamination
Method of making an internally channeled glass article
Clutch outer
Insulin supplemented infant formula
Confidence determination
Misfire detection device for an internal combustion engine
Interface system for servo controller
Spread spectrum communications system