Wind powered system for generating electricity

Patent · Tue Jan 21 04:00:00 EST 1986

OSTI ID:6053353

Baskin, J M; Miller, G E; Wiesner, W

This patent describes a wind turbine system for generating electricity. It consists of: a wind turbine rotor; a rotor shaft connected to the hub for rotation with the wind turbine rotor; a step-up transmission having a low speed input connected to the rotor shaft and a high speed output; a rotary pole amplitude modulated induction machine having a rotor that is connected to the output of the transmission, the machine being operable as a generator at a plurality of discreet speeds of rotation; wind speed responsive switch means for changing speed of operation of the induction machine; and within the wind turbine rotor is made-up of an elongated central hub with no twist having rounded edges and a substantially constant thickness between the edges; a pair of fixed pitch essentially straight blades, each blade extending radially outwardly from the hub in a direction diametrically opposite from the other blade; each blade has a mid-section of airfoil cross section positioned radially outwardly of the central hub portion, and a tip section of airfoil cross section positioned radially outwardly of the mid-section; each blade smoothly changing from the substantially constant thickness and rounded edge shape of the central hub portion into an airfoil cross section as it extends radially outwardly from the central hub portion; each blade first changing to first a plus twist and then a zero twist and then a minus twist as it extends radially outwardly; each blade tapering in thickness and chord as it extends radially outwardly from a location in its mid-section through its tip section.

• Assignee: Boeing Co., Seattle, WA
• Patent Number(s): US 4565929
• OSTI ID: 6053353
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
170602* -- Wind Energy Engineering-- Turbine Design & Operation
AERODYNAMICS
DESIGN
DIMENSIONS
ELECTRIC GENERATORS
FLUID MECHANICS
INDUCTION
MACHINE PARTS
MACHINERY
MECHANICAL TRANSMISSIONS
MECHANICS
MOTION
ROTATION
ROTORS
SIZE
THICKNESS
TURBINE BLADES
TURBINES
TURBOMACHINERY
VELOCITY
WIND TURBINES