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Method of controlling electrical rotating machines connected to a common shaft
   
Document Number
US Patent 7002259
Issued Date
February 21, 2006
Link
Inventors
Howes; Lawrence H. (Santa Barbara, CA)
Mikhail; Amir S. (Santa Barbara, CA)
Deane; Geoff F. (Santa Barbara, CA)
Map
Abstract
A controller for high torque, low RPM wind turbines and ocean current turbines. The turbine consists of a large, input power shaft-mounted, rotating bull-gear with stationary powertrains mounted around its periphery. The gear teeth on the bull-gear rotate past the teeth on pinions, causing the pinions to turn and delivering power to each smaller powertrain. A controller regulates torque experienced by each powertrain to assure that torques are balanced between generators at any given system load. The control method comprises the programmatically continuously looping steps of measuring a system parameter to be controlled, such as torque and/or speed, selecting the optimal number of generators to be connected/disconnected to a utility line, incrementally connecting or disconnecting generators to achieve the point of optimal performance, measuring the parameters, such as current and/or voltage, of the connected generators and adjusting the generator parameters to fine tune the system for optimal performance.
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Number of Claims:
6
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Published
February 21, 2006
Application Number
10/224,108
Filed
August 20, 2002
US Classification
290/4C   290/6 290/7 322/10
Int'l Classification
H02P   9/04   (20060101)  
Attorney/Law Firm
Parent Case
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of US Provisional Patent Application No. 60/313,725 Filed: Aug. 21, 2001, and is related to U.S. Pat. No. 6,731,017 entitled "Improved Distributed Powertrain That Increases Electric Power Generator Density" filed Aug. 7, 2002, and granted May 4, 2004, both of which are incorporated herein by reference.
USPTO Field of Search
290/1C   290/43   290/54   290/44   290/55   310/75R   322/10  
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