SBIR Phase I: Low Noise Loosely-Coupled Wireless Power Transfer System with Single Transistor Differential Drive

该小型企业创新研究（SBIR）第一阶段项目旨在开发一种能够为中远程无线电力传输系统供电的差动驱动系统。传统的驱动电路产生大量的噪声和干扰，这妨碍了无线传输系统的正常操作。由于无线电力系统的传输功能，这种噪声和干扰的影响是显著的，并且限制了大多数无线电力系统的可用性。用于为无线电力发射器供电的差分驱动电路通过依赖于振荡信号在发射器与接收器之间传输电力而大大降低噪声。这种振荡降低了每个振荡的噪声的幅度，但更重要的是配对并因此整体上消除了系统产生的噪声。通过仔细的调谐和校准，这些振荡是相互关联的，消除了噪声并减少了产生的噪声。设计差分驱动器为电路供电，使各种无线供电系统能够满足所有法规要求，并在不产生过多干扰的情况下向手机和其他电子系统传输电力。该项目更广泛的影响/商业潜力是允许无线电力输送系统的广泛采用和集成。对无线电力的商业开发的先前限制已经受到监管限制和由这些系统产生的过度噪声的限制。使用差分驱动器，允许开发各种发射器和应用，以及增加无线功率的潜在范围。除了通过监管要求外，差分驱动系统还允许将无线功率接收器集成到各种电子手持设备中，这在以前是不可能的。差分驱动器将减少干扰，使得诸如移动的电话、膝上型计算机和其它手持设备的先前应用现在可以无线供电。这个项目的影响？的目标在扩大无线供电的范围和可用性方面意义重大。噪声和干扰的减少将提高无线供电系统的可用性，并增加在消费电子和军事电子领域的采用。

This Small Business Innovation Research (SBIR) Phase I project is intended to develop a differential drive system capable of powering a mid- to long-range wireless power delivery system. Conventional drive circuits create significant quantities of noise and interference that prohibits the proper operation of wireless delivery systems. Due to the transmitting function of a wireless power system, the implications of this noise and interference are significant and limit the usability of most wireless power systems. A differential drive circuit used to power the wireless power transmitter greatly reduces noise by relying on an oscillating signal to transmit power between transmitters and receivers. This oscillation reduces the magnitude of noise of each oscillation, but more significantly pairs and therefore cancels noise generated system as a whole. With careful tuning and alignment, these oscillations are correlated, canceling the noise and reducing the noise generated. Designing a differential drive to power the circuit allows a variety of wireless power systems to meet all regulatory requirements and transmit power to handsets and other electronic systems without excessive interference. The broader impact/commercial potential of this project is to allow for widespread adoption and integration of wireless power delivery systems. Prior limitations on commercial exploitation of wireless power have been limited by regulatory limitations and the excessive noise created by these systems. Using a differential drive, permits a variety of transmitters and applications to be developed, as well as increase the potential range of wireless power. In addition to passing regulatory requirements, the differential drive system permits wireless power receivers to be integrated into a variety of electronic hand-sets that were previously impossible. The differential drive will reduce interference, such that prior applications such as mobile phones, laptops, and other handhelds can now be powered wirelessly. The implications of this project?s goals are significant in expanding the range and usability of wireless power. Reductions in noise and interference will improve usability of wireless power systems, and increase adoption in both the consumer and military electronics fields.