OREGON STATE UNIVERSITY

You are here

Design and Evaluation of a 300 kW Dual Mechanical Port Machine Used as Variable Gearbox in Wind Power Generation

TitleDesign and Evaluation of a 300 kW Dual Mechanical Port Machine Used as Variable Gearbox in Wind Power Generation
Publication TypeConference Paper
Year of Publication2009
AuthorsZhang, J., L. Xu, and X. Sun
Conference NameExposition of Electrical Manufacturing and Coil Winding Association
Date Published09/2009
Conference LocationNashville, TN
KeywordsDual Mechanical Port (DMP) Machine, variable gear box, variable gear ratio, wind power generation
Abstract

Wind power generation systems based on Doubly-Fed Induction Generators (DFIG) require gearboxes to couple the DFIGs to wind turbines. Those gearboxes are heavy, highly cost and generally have fixed gear ratios. This paper presents a Dual-Mechanical-Port (DMP) machine and focuses on its new application as a variable gearbox in wind power generation. The outer rotor (surface PM rotor) is directly driven by the wind turbine and controlled to track the maximum output power operation points in terms of different wind speeds. The inner wound rotor is always operating at a fixed speed to drive another generator to produce the electrical power of a fixed frequency. The design procedures of a 300 kW DMP machine with a variable gear ratio from 5:1 to 12.5:1 are demonstrated in this paper. FEA analysis verifies that the DMP motor is capable of delivering the desired torque.