License and Technology Review Radial Flux Technology

License and Technology Review

Radial Flux Radial Flux TechnologyTechnology

License StatusLicense Status

To: Small Wind Turbines, LLC (SWT)

◦ Permitted Application: 5kw -99kw small wind ◦ Permitted Territory: Worldwide◦ License Type: Exclusive◦ Right to manufacture or have manufactured◦ Right to sell and distribute◦ Subject to: Product Development & Licensing

Agreement dated January 26, 2009

Radial Flux Technology Radial Flux Technology (RFT)(RFT)

T Flux trials over a decade RFT a derived technology from T

FluxRFT prototype tested by Garrad

HassanSWT designs complete to

prototype

Key FeaturesKey Features

• Light and Compact due to its innovative design.

• Unique Permanent Magnet Technology

• High Efficiency allows use of smaller drive engine

Conventional Generator

Radial Flux Generator

Single stator

Dual stator

Traditional PMGTraditional PMG

vs. RFT PMGvs. RFT PMG

Rotor

Wind Turbine RFT Wind Turbine RFT BenefitsBenefits

A low rpm permanent magnet direct drive replaces gearbox and high rpm generator

Jacobs (US) used for comparison analysis

Generator/Gearbox weight reduced

by 43%Electrical generation efficiency

increased 30%

Wind TurbinesWind TurbinesRFT vs Jacobs Gearbox RFT vs Jacobs Gearbox

TurbineTurbineRFT

G-20-180-AJacobs20kw

Speed (rated RPM) 180 1230

Power (rated Kw) 20 20Weight (Kg) 213 262

Generator Type PMG 3 phase Synchronous Brushless 3 phase

Drive Direct 6-1 Gearbox

Gearbox Weight (Kg) No gearbox 114

Combined Efficiency (%) 96% 67.2%

Productive Operating Wind Speed (m/s)

0-12 7-12

• Conclusions 43% less weight 30% greater power

• Produces usable power from low wind speeds

Jacobs 20kw vs. RFTJacobs 20kw vs. RFT

Gearbox

Generator

RFT based TurbineRFT based Turbine

20kW RFT 20kW RFT Wind Design StatusWind Design Status

FEA completeProduction design

complete

20kW RFT Completed 20kW RFT Completed DesignDesign

20kw RFT Completed 20kw RFT Completed DesignDesign

20kw RFT Prototype Status

• Three prototypes in production• 20 kw now complete, 10 kw by 7-30-10• Machining has begun on 40 kw• All three will be complete by 8-31-10• Testing, modifications and tooling complete for 20 kw unit by 7-1-10