Fabric to harvest energy from athletes Danfoss Polypower A/S based in Denmark designs and manufactures PolyPower DEAP smart film and elements. Finding the best applications for the smart DEAP material is the key to success, and in collaboration with customers, Danfoss PolyPower focuses particularly on designing and developing products within, adaptive airfoils, valves and pumps, and sensors.
Danfoss has developed a fabric which uses electrostatic film to gather information on performance during sporting activities. Such measurements include data on knee and elbow angle, shoulder alignment, breathing rates, muscle volume and other information for achieving maximum results. Danfoss claims that the fabric has the potential to harvest energy not only from human movement, but also from ocean waves. According to the company DEAP technology is a platform technology as fundamental as electro-magnetic solenoid, piezo ceramics etc. The DEAP ( Electro Active Polymers) technology can be used for actuation, sensing and , challenging known standards and designs.
EAP (Electro Active Polymer) technology has been known for many years. EAPs are polymers that exhibit a change in size or shape when stimulated by an electric field. They can have several configurations, but are generally divided in two principal classes: (DEAP) and Ionic. In DEAPs, actuation is caused by electrostatic forces between two electrodes which squeeze the polymer. DEAPs are capable of very high strains and are fundamentally a that changes its when a voltage is applied by allowing the polymer to compress in thickness and expand in area due to the electric field. DEAP is a unique technology as it covers the medium force-medium strain range compared to other widespread technologies. Compared to today’s dominant technologies, electromagnetics and pneumatics, the DEAP technology has very strong value propositions. Along with higher force density and good strain capability, the technology has unparalleled energy efficiency, is very fast acting, and the direct acting and compliant nature enables unique actuator solutions. Danfoss PolyPower has developed a special optimized DEAP design ensuring high performance and the ability to volume manufacturing. The film is made of a silicone material. It has a corrugated surface covered by a layer of metallic electrode. When high voltage is applied, the film expands in plane and contracts in thickness. The Polypower material makes it stretch in length and stiff in width. A very interesting and emerging application for the PolyPower technology is ; or more generically, generators that transform mechanical energy to electrical energy. By squeezing and/or stretching the PolyPower material the will change which will enable conversion of mechanical to electrical energy. Ideally DEAP generators will enable service free, high efficient direct transformation of linear mechanical movements to electrical energy. Direct acting and with very high energy density, the DEAP generators have the potential to become a truly disruptive technology within this field. In the future Danfoss forsees that DEAP generators will harvest energy from wind, wave, vibrations and more. is a major research area for Danfoss PolyPower A/S with focus on a few selected projects. The company is currently working towards developing an installation of the material, which can harvest energy from offshore waves. Source and top image: Danfoss Polyower A/S For more read Energy Harvesting and Storage for Electronic Devices 2012-2022 And attend Energy Harvesting & Storage Europe 17-18 April 2013, Berlin, Germany
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