RR Research

WiTricity is based on strong coupling between electromagnetic resonant objects to transfer energy wirelessly between them. This differs from other methods like simple induction, microwaves, or air ionization. The system consists of transmitters and receivers that contain magnetic loop antennas critically tuned to the same frequency. Due to operating in the electromagnetic near field, the receiving devices must be no more than about a quarter wavelength from the transmitter Unlike the far field wireless power transmission systems based on traveling electro-magnetic waves, WiTricity employs near field inductive coupling through magnetic fields similar to those found in transformers except that the primary coil and secondary winding are physically separated, and tuned to resonate to increase their magnetic coupling. These tuned magnetic fields generated by the primary coil can be arranged to interact vigorously with matched secondary windings in distant equipment but far more weakly with any surrounding objects or materials such as radio signals or biological tissue. In particular, WiTricity is based on using 'strongly-coupled' resonances to achieve a high power-transmission efficiency. Aristeidis Karalis, referring to the team's experimental demonstration, says that "the usual non-resonant magnetic induction would be almost 1 million times less efficient .. more»

Original Source: Wind Turbine Pitch Industry Buy Now: Market Research 2010 Deep Research Report on China Wind Turbine Pitch Systems Industry was published by QYResearch Wind Energy Research Center on June 2010. It was a professional and depth research report on China Wind Power Pitch Systems Industry. We focus on China domestic market in this report and make a comprehensive and objective reflection of the status of China's current wind power Pitch Systems industry. Wind power Pitch Systems is core component of large-scale wind turbine and is currently in the low level of domestic production. In the report, the following information will be included: China Wind turbine Pitch Systems production and demand from 2009-2014; Top 9 Foreign Wind Turbine Pitch Systems manufacturers in China and Top10 China Domestic Wind Turbine Pitch Systems manufacturers Capacity Production Cost Average selling price Production Value Revenue Profit etc information; China Wind Turbine Pitch Systems industry development trend and relevant conclusions; Finally, we conduct a comprehensive summary of China Wind Turbine Pitch Systems industry, including the past present and forecast the future, we also make a feasibility analysis of 500 sets/year Electric Pitch Systems project,we carry out accurate calculation on investment cost, revenue, .. more»