Methods for controlling the path of magnetic flux from a permanent magnet and devices incorporating the same  
Patent Number:  US6246561 
Publication date: 2001-06-12 
Inventor(s): FLYNN CHARLES J (US) 
Applicant(s): MAGNETIC REVOLUTIONS LTD L L C (US) 
Requested Patent:  WO0007285 
Application Number: US19980127056 19980731 
Priority Number(s): US19980127056 19980731 
IPC Classification: H02K21/12 
EC Classification: H02K1/12; H02K21/04; H02K21/44; H02K33/12; H02K41/03 
Equivalents:  
Abstract

A permanent magnet device includes a permanent magnet having north and south pole faces with a first pole piece positioned adjacent one pole face thereof and a second pole piece positioned adjacent the other pole face thereof so as to create at least two potential magnetic flux paths. A first control coil is positioned along one flux path and a second control coil is positioned along the other flux path, each coil being connected to a control circuit for controlling the energization thereof. The control coils may be energized in a variety of ways to achieved desirable motive and static devices, including linear reciprocating devices, linear motion devices, rotary motion devices and power conversion
Data supplied from the esp@cenet database - l2