07859231 is referenced by 8 patents and cites 7 patents.

A permanent magnet (PM) electric generator with directly controllable field excitation control comprises: a drive shaft; a PM rotor assembly with multiple PMs arranged around an outer axial periphery of the rotor assembly; a stator assembly comprising a ferromagnetic stator yoke, multiple ferromagnetic stator teeth mounted to the stator yoke with distal ends proximate the outer axial periphery of the rotor assembly separated by an air gap and multiple stator coils mounted between the stator teeth; multiple saturable ferromagnetic shunts, each shunt coupling adjacent distal ends of the stator teeth to shunt air gap magnetic flux Φg generated by the PMs across the air gap through the distal ends of the stator teeth; and multiple saturation control coils, each saturation control coil wrapped about a saturable region of an associated one of the shunts; wherein application of a control current Ic to the control coils at least partially magnetically saturates the shunts to reduce shunting of air gap magnetic flux Φg, thereby increasing magnetic flux linkage ΨM between the PMs and the stator coils and increasing generated electromagnetic force (EMF) at lower levels of rotor assembly angular velocity.

Title
Permanent magnet electric generator with variable magnet flux excitation
Application Number
12/61309
Publication Number
7859231 (B2)
Application Date
April 2, 2008
Publication Date
December 28, 2010
Inventor
Gregory I Rozman
Rockford
IL, US
Jacek F Gieras
Glastonbury
CT, US
Agent
Stephen G Mican
Assignee
Hamilton Sundstrand Corporation
CT, US
IPC
H02K 3/493
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