|
Publication Number: CEC-500-2006-018
Abstract:
This research investigated controls for a novel gearbox for large diameter, high torque wind turbines. This gearbox consists of an input shaft-driven bull gear that drives a number of pinions around its periphery. These pinions, which divide the input torque load at its highest point, thereby reducing gear tooth stress, each drive small generators. Equipment for this program included a lab scale gearbox (5 x 0.5kW squirrel cage induction generators) and a small (<5kW) dynamometer. This equipment was fed with 480 V three phase AC power, and a sophisticated system control and data acquisition system was added to measure all significant generator characteristics. Controls work focused upon generator torque load modulation using voltage variation. Each of the generators was characterized on the dynamometer, and then load sharing was assessed using the gearbox. The generators' torque-speed curves were measured at varying voltages, pushover characteristics were assessed, and data was applied to the design of control elements. These control elements were then added, the codes were for actuation, and the controls system was tested. Generator characteristics were assessed and capabilities of the control system were quantified.
Author(s): Geoffrey Deane, Larry Howes, James Hahn Commission Division: Technology Systems Division - R&D, PIER (500)
Office/Program: Energy Innovations Small Grant Pgm
PIER Program Area: Energy Innovations Small Grant (EISG)
Date Report Completed: February 2006
Date On Line:
02/22/2006
Acrobat PDF File Size: 38 pages,
1,100 kilobytes**
| 
