Now that the U.S. election is over, there is renewed activity to push Congress and the President to extend the Wind Energy Tax Credit (PTC). Advocates from both sides of the aisle, governors and industry groups have combined to implore Congress to act before the end of the year. See the article here.
So what does this have to do with PowerbyProxi and wireless power? One key issue is the cost of power generated by the wind turbines currently in operation and the on-going cost for turbines that will be erected under the tax credit. PowerbyProxi has been intimately involved in designing solutions that address one key source of turbine downtime and maintenance costs, the slip ring on the turbine pitch control system.
The pitch control system is the key safety system on an operating turbine. The reliability of this system directly impacts uptime and power production efficiency. Proxi’s wireless slip ring, the Proxi-Ring, has just completed its two year trial on a wind turbine in Spain with zero downtime. This is compared to what the operator previously experienced with necessary downtime for cleaning and maintenance on the mechanical slip ring being 6 times during a comparable period.
With this extended reliability testing behind us, PowerbyProxi will be moving to full commercial roll out in 2013 to help reduce operating costs on current wind turbine installations, and working to get OEMs to include high reliability Proxi-Rings on new turbines. In doing so, we can secure the value of the Tax Credit investment and provide low cost power to the consumer. As a Green Energy company, we ask that you support the PTC and continued expansion of clean energy technology.
PowerbyProxi presents: “Powering Sensors in Hostile Environments”
Alternative & Renewable Energy Open
April 27th 3:30 – 4:30 pm EDT
FREE Online Event Sponsored by GlobalSpec
April 27, 2011 – Power-by-Proxi invites you to attend a free online seminar, featuring Fady Mishriki, CEO/Business Development & Co-founder who will present “Powering Sensors in Hostile Environments”.
In this presentation, attendees will learn of a contactless slip ring that provides wireless power and data to pitch control systems in wind turbines. This improves wind turbine efficiency by reducing the cost of maintaining and replacing existing mechanical slip rings and their carbon brushes, especially in wet, dirty environments, where rotational movement is involved, and power cables and physical connectors are problematic, expensive, and unreliable. Power transfer without wires or frictional contact ensures sensor operation in hard-to-reach locations. Replacing traditional wiring harnesses with wireless power transmitters and receivers ensures reliable sensor operation in hostile environments, in applications involving rotational movement, and in hard-to-reach locations.
To register, please visit: http://www.globalspec.com/events/eventdetails?eventId=105
PowerbyProxi, developers of high-efficiency, industrial wireless power solutions, have introduced alternative power technologies that reduce or avoid the problems of brush slip ring designs. The company’s contactless slip rings transmit power and data between stationary and rotating frames without the use of conventional slip rings or brushes. In these devices, there is no physical contact between the rotating and fixed parts of the apparatus. Inductive components are used to provide a reliable and efficient transfer of electrical power and data across the rotational boundary.
Fady Mishriki, CEO and Co-Founder of PowerbyProxi says “The conventional approach of using a mechanical slip ring to transfer power and data can be problematic, expensive and unreliable. By eliminating friction-based connection failures, wireless power transfer can reduce operation and maintenance costs, preserve data continuity, and free designers to create innovative solutions.”
For example, our contactless slip ring solutions, offers these capabilities:
1. Provides cost-effective, maintenance-free alternative to mechanical slip ring devices
2. Eliminates friction or heating between rotating and stationary components
3. Provides highly efficient transfer of power and data across short distances through inductive power transfer.
4. Enables complete freedom of movement (360° continuous rotation) across rotary joints, unlimited RPM and no need for lubrication and cooling.
5. Replaces through-hole slip rings and other wired electrical connectors. Proxi-Ring components can be manufactured for easy “plug and play” replacement of existing mechanical slip ring components.
3 applications where contactless slip rings provide substantial benefits:
Traditionally, DC servo motors have been used for wind turbine pitch control actuation. However, the trend toward larger turbines, increasingly isolated installations, and continued use of operate until failure maintenance practices drives down reliability and increases the total cost of energy (COE) of wind power operations. Also, slip ring devices fail frequently and require regular maintenance, cleaning and brush replacement, which results in expensive downtime.
Adding brushless PowerbyProxi slip rings and dynamic harmonization control technologies to wind turbine pitch control systems during the design and operations-maintenance phases of the turbine lifecycle can improve performance and reduce operations and maintenance costs. Proxi-Ring technology includes no moving parts, which can fail or cause false restarts. Wireless power solutions can reduce wiring failures. And, PowerbyProxi technology provides unlimited and continuous rotation speeds, which enable wind turbine designs to operate in variable load operating environments.
Like wind turbine applications, PowerbyProxi radar solutions provide 360° continuous rotation across rotary joints. However, these solutions also require continuous data transmission to enable safety and technical analysis. PowerbyProxi solutions are designed to operate in a wide variety of communications systems. Fully integrated wireless data supports most industrial protocols, including CAN-Bus (J1939), RS 485, RS 422, Ethernet, and PLC (4-20mA).
Heavy machinery in extreme environments.
PowerbyProxi solutions are also designed to operate in heavy machinery that operates in wet, dirty, or other hostile environments. The company’s first Proxi-Ring system was a forestry solution. It had to be highly corrosion resistant, able to withstand extreme heat, cold and humidity, and survive shocks of up to 50 Gs. These capabilities, high power transmission reliability, and plug-and-play installation reduced the cost of replacing hard-cabled power alternatives.
Test how wireless power can improve designs in your company today with one of our products.
Industrial designers, engineers and manufacturers in industries that employ machinery with rotating parts or operate in hostile or hard-to-reach work environments need new ways to ensure continuous data transmission and reduce critical downtime that occurs from failed electrical and mechanical connectors.
Slip ring technology was developed to overcome the constraints of power cables and mechanical components, which can increase maintenance costs in hostile environments and limit design options in applications that use moving parts.
Carbon brush slip rings were an early design alternative. These electromechanical components when used with brushes, provide a continuous electrical connection between rotating parts and stationary conductors. However, these devices incur downtime due to failed electrical and mechanical connectors. Mechanical, through hole, and high-current slip ring designs also limit designers’ and manufacturers’ ability to power systems in wet, dirty or hostile conditions that involve vibration and 360 degree movement.
Read about PowerbyProxi’s Proxi Ring in Windpower Engineering’s This slipring does not slip
Try our revolutionary wireless power solutions today
The trend toward larger wind turbines, increasingly isolated installations and continued use of operate-until-failure maintenance practices drives down reliability and increases the total cost of energy (COE) of wind power operations.
As a result, wind turbine OEMs continue to search for innovative wind turbine designs with improved performance and lower COE. And, wind turbine project operators are interested in more cost-effective alternatives to aging turbines that are increasingly expensive to maintain.
At the show we talked with wind turbine manufacturers and operators about the role of pitch control in operational efficiencies. Modern wind turbines adjust rotor blade pitch angle for safety and control.Pitch control optimizes blade performance and therefore, overall turbine performance. However, to be cost-effective, pitch control systems require high levels of uptime.
Correcting pitch control system failures or false resets require substantial maintenance costs. And, optimal turbine performance can be limited by factors such as turbine design, turbine location and the need of high levels of data and power availability.
Wireless slip rings are an innovative method for wirelessly transmitting power or data between stationary and rotating frames without the use of conventional slip rings or brushes. In these solutions, there is no physical contact between the rotating and fixed parts of the apparatus. Inductive components are used to provide a reliable and efficient transfer of electrical power across the rotational boundary, reducing maintenance costs and improving overall uptime for the operator.
PowerbyProxi’s Proxi-Ring contactless slip ring provides wireless power and data to pitch control systems in wind turbines, improving wind turbine efficiency by reducing the cost of maintaining and replacing existing mechanical slip rings and their carbon brushes.
Operation and maintenance costs are a sizable portion of wind turbine annual expenditures. By replacing traditional slip rings with the Proxi-Ring, PowerbyProxi aims to eliminate a major source of turbine downtime due to mechanical slip ring failure.
PowerbyProxi’s Proxi-Wave technology is unique in its ability to cater to the demands of variable load operating environments and overcomes the limitations of earlier generations of Inductive Power solutions that suffered from excessive heat generation.
Two solutions exist to provide wireless electricity to wind turbines across rotary joints.
The Proxi-Ring 240 and 750 products are completely wireless alternatives to mechanical slip rings for hydraulically controlled systems. Both of these solutions have been designed to make it easy for Wind Turbine vendors to incorporate in new turbines or for wind farm operators and maintenance service providers to retrofit to existing wind turbines.
The Proxi-Ring 750 is also available as a hybrid solution developed in conjunction with UEA Inc. to deliver a new high performance solution for electric pitch control systems. In the hybrid solution the Proxi-Ring is used to provide wireless electricity to the critical low power and data channels.