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Title: Axial gap rotating electrical machine

Patent ·
OSTI ID:1238805

Direct drive rotating electrical machines with axial air gaps are disclosed. In these machines, a rotor ring and stator ring define an axial air gap between them. Sets of gap-maintaining rolling supports bear between the rotor ring and the stator ring at their peripheries to maintain the axial air gap. Also disclosed are wind turbines using these generators, and structures and methods for mounting direct drive rotating electrical generators to the hubs of wind turbines. In particular, the rotor ring of the generator may be carried directly by the hub of a wind turbine to rotate relative to a shaft without being mounted directly to the shaft.

Research Organization:
Clear Path Energy, LLC, Wilmington, DE (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
EE0005489
Assignee:
Clear Path Energy, LLC (Wilmington, DE)
Patent Number(s):
9,270,150
Application Number:
13/743,187
OSTI ID:
1238805
Resource Relation:
Patent File Date: 2013 Jan 16
Country of Publication:
United States
Language:
English

References (37)

Windmill patent May 1984
Structureborne vibration-compensated motor arrangement having back-to-back twin AC motors patent October 1991
Brushless direct current motor system patent June 1993
Wind turbine patent May 1994
Wind turbine adaptable to wind direction and velocity patent February 1997
Horizontal axis wind turbine patent May 2000
Integrated rotor-generator patent January 2001
Rotary electric motor having magnetically isolated stator and rotor groups patent December 2002
Multaxel windmill patent December 2003
Small underwater generator with self-adjusting axial gap patent April 2004
Wind turbines for electrical power generation patent July 2004
Rotary electric motor having at least two axially air gaps separating stator and rotor segments patent September 2004
Segmented arc generator patent December 2004
Wind turbine patent May 2006
Offshore wind turbine with multiple wind rotors and floating system patent July 2006
Direct drive wind turbine patent October 2006
Electrical machine with double-sided rotor patent December 2006
Device for a wind power station placed in deep water patent January 2007
Wind turbine with floating foundation patent January 2007
Method and apparatus for wind turbine air gap control patent February 2007
Direct drive wind turbine patent February 2007
Wind energy conversion device patent March 2007
Position-control stage system patent April 2007
Method of controlling a wind power installation patent April 2007
Power generation assemblies, and apparatus for use therewith patent November 2007
Axial gap motor patent January 2008
Permanent magnet rotor for a direct drive generator or a low speed motor patent April 2008
Wind turbine for use offshore patent November 2008
Rotating electrical machine patent November 2008
Rotor and electrical generator patent January 2009
Rotor structure of an axial gap rotating electrical device patent August 2009
Floating wind turbine system patent November 2009
Arcuate coil winding and assembly for axial gap electro-dynamo machines (EDM) patent January 2010
Wind power generator and bearing structure therefor patent March 2010
Linear wind-powered electric generator patent May 2010
Wind turbine direct drive airgap control method and system patent May 2011
Superconducting Electrical Machines patent-application July 2008

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Related Subjects

42 ENGINEERING
17 WIND ENERGY