Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Permanent magnet brushless machine with magnetic flux regulation










Image Number 2 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
Modified continuous phase modulation communications system and related methods
Synchronization of communication equipment
Mobile terminal
DNA promoters and anthrax vaccines
Method, system and program for securing redundancy in parallel computing system
Antenna for an automobile
Nanoparticles in a flash memory using chaperonin proteins
  Randomly Featured Patents
Method of checking the loading and unloading of tankers by means of an electromagnetic identification system, and an identification system for use in said method
Electronic document modification
Haemostatic agents
Plastic bag rack
Light emitting device
Method for measuring initial hydrocarbon concentration in canister and controlling fuel injection thereby, and system thereof
Base for a business chair
Guide bar for a chain saw
Clip-on watch
Method and apparatus to reduce the effects of maxwell terms and other perturbation magnetic fields in MR images