Talk:Directory:Broadstar Wind Systems

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Discussion page for Directory:Broadstar Wind Systems

Image:BroadStar AeroCam 95x95.jpg

Like a wind surfer, the horizontal blades of the Broadstar turbine change their angle of attack as they go around the perimeter, so that they are generating torque in nearly every position. It is much easier to ship and assemble these units because the largest components can be fit in 20-foot shipping containers.


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From: Daniel Bowers

To: Sterling D. Allan

Sent: Wednesday, June 11, 2008 2:13 AM

Subject: Broadstar Horizontal Wind


I was just checking out the Broadstar Horizontal Axis Wind Turbine.

There are some discrepancies I have with the system.

My first thought is that there are 10 blades on each side with 40 rotating cam shafts + two pivot points for each main axle as well as the main nacelle housing to turn the unit into the wind depending on the installation location. This represents 44+ lubrication points which will require routine maintenance.

The axial turbine from called the WindWing applies the concept of lift in a different way.

I believe that there are some issues when it comes to drag on the broadstar system due to having blow through in the truss frame structure. Each contact point in a truss frame structure which is moving like that creates a potential disaster in the long run.

I don't really see this system as being reliable.

I would like to see wind tunnel testing as well as endurance testing under high stress conditions. Max wind speed for a prolonged duration to the fail point as well as wind and rain tests to test the durability of this system.

There is one potential with the truss structure which these guys may not have considered.

The ability for a quick installation in relief efforts. That is the only benefit of a truss structure which can expand like an erector set but still there is limited marketability for this type of application. Many companies are focused on emergency power systems, this could be another tool for that shed.

I really don't see this technology as a Top 100 pick.

If I were to nominate a horizontal axis wind turbine my first pick would be which i found on my own while looking up linear generators for wave applications.

Here are some exerpts from the article I found

"Gearless permanent magnet generators were selected over conventional technology as the companies involved decided that at higher megawatt levels the new alternative could provide better reliability and performance than gear-based systems. Seeking to lead the gearless revolution, experts from Rotatek Finland Oy, Verteco Oy and Vaasa Engineering Oy, worked under the Arctic Wind Power Consortium to develop an optimal solution."

"The development of NdFeB-based (Neodymium, iron and boron) permanent magnets has made it possible to manufacture high-efficiency, high-power factor synchronous AC machines. The NdFeB-based permanent magnets have a high flux density, a high coercive force, a high performance/cost ratio and are high energy producers. "

"One generator consists of 12 three-phase linear generator segments. Four linear segments are symetrically coupled into a single 1.2 MW inverter package. Therefore one 3 MW turbine system consists of three 1.2 MW packages. So, if one inverter package is put out of order, or in the unlikely case of two packages being damaged, the system can still keep running."

"The converter modules can each run independently, with any combination of one, two or three modules in operation depending on the power need and maintenance requirements. For example, with low winds it may be necessary for only one or two to be connected. This modular approach gives improved efficiency, as converter losses are lower than with all three modules running.

If low wind conditions persist leading to prolonged running on one or two modules, the hot modules can be rotated in use to give extended lifetime and improved reliability. If there is a fault in one of the modules, the faulty one can be disconnected while the remaining units remain connected to the grid and the turbine continues to produce electricity at partial power. Although the output power is reduced the reliability and overall efficiency are improved."

This system has 12x system redundancy vs. a traditional horozontal axis system which has to be completely shut down if there are any problems. This type of system means the likelyhood of a complete failure is minimal and there will not be complete power loss unless the tower were to collapse or something of that nature.

I recommend reading this full article and having the NEC review this technology:

Power from Thin Air

My second recommendation which would be the WEG 100 from Wind Energy Group. This system may be suitable for industrial park applications and medium density urban areas such as the AeroVironment Architectural Wind System.

I personally like the look of the AeroVironment system vs. the Broadstar System.

Anyway, it is late I will talk to you soon but take a look at the Scanwind turbine when you have a chance.

~ Daniel

See also



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Directory:Wind:Past Developments



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Directory:High-Efficiency Horizontal Axis Wind Turbines

Directory:Home Generation:Wind Turbine

Directory:Vertical Axis Wind Turbines

Directory:High Altitude Wind Power


Directory:Wind Augmentation

Directory:Power Via Atmospheric Pressure Differences


Directory:Humdinger Windbelt



Directory:Wind Power in the United Kingdom

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- Directory







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