The equivalent two-port network model of a middle range wireless power transfer(WPT) system was presented based on strongly coupled multiple resonators. The key parameters of the WPT system include self-inductance, re...The equivalent two-port network model of a middle range wireless power transfer(WPT) system was presented based on strongly coupled multiple resonators. The key parameters of the WPT system include self-inductance, resistance, parasitic capacitance, mutual inductance and S-parameters of coils & resonators were analyzed. The impedance matching method was used to optimize load power and transmission efficiency of the multi-resonator WPT system, and the impedance matching method was realized through adjusting the distances between the coils and resonators. Experiments show that the impedance matching method can effectively improve load power and transmission efficiency for middle range wireless power transfer systems with multiple resonators, at distances up to 3 times the coil radius with efficiency more than 70% and load power also close to 3.5 W.展开更多
随着医疗技术的不断进步,植入式医疗设备IMD(implantable medical devices)在临床上的应用越来越多。由于传统的电池供电方式会给患者带来额外的组织损伤和手术成本,采用无线电能传输WPT(wireless power transfer)技术对IMD供电将成为...随着医疗技术的不断进步,植入式医疗设备IMD(implantable medical devices)在临床上的应用越来越多。由于传统的电池供电方式会给患者带来额外的组织损伤和手术成本,采用无线电能传输WPT(wireless power transfer)技术对IMD供电将成为今后的趋势。然而,如何在有限的空间内设计出高效率的IMD-WPT系统具有较大的挑战性。为此,对比了5种适用于IMD的WPT技术的性能特点;然后以磁谐振式WPT技术为例,具体介绍了磁谐振式IMD-WPT系统设计中的关键问题;最后结合部分磁谐振式WPT技术在一些典型IMD中的应用现状,讨论了IMD-WPT技术未来的研究方向。展开更多
在磁耦合谐振式无线电能传输MCR-WPT(magnetically-coupled resonant wireless power transfer)系统中,线圈作为能量中转的关键环节,其参数的设计决定了系统的传输效率,但目前仍然没有成熟完善的线圈设计方法。将平面螺旋线圈作为研究对...在磁耦合谐振式无线电能传输MCR-WPT(magnetically-coupled resonant wireless power transfer)系统中,线圈作为能量中转的关键环节,其参数的设计决定了系统的传输效率,但目前仍然没有成熟完善的线圈设计方法。将平面螺旋线圈作为研究对象,采用阿基米德螺线方程,建立了精确的数学模型,分析了耦合线圈互感、自感、电阻与线圈几何参数的关系,得到了较为精确的计算方法。通过COMSOL进行仿真验证,在线圈匝间距较小时,各电量计算误差在5%以内。针对给定的限定条件,以线圈传输效率作为优化目标,通过Matlab求解出最优的线圈参数。最后,绕制实际的线圈并由实验测得其最大传输效率超过95%,证明了线圈设计方法的合理性。展开更多
基金Project(61104088)supported by the National Natural Science Foundation of ChinaProject(12C0741)supported by Scientific Research Fund of Hunan Provincial Education Department,China
文摘The equivalent two-port network model of a middle range wireless power transfer(WPT) system was presented based on strongly coupled multiple resonators. The key parameters of the WPT system include self-inductance, resistance, parasitic capacitance, mutual inductance and S-parameters of coils & resonators were analyzed. The impedance matching method was used to optimize load power and transmission efficiency of the multi-resonator WPT system, and the impedance matching method was realized through adjusting the distances between the coils and resonators. Experiments show that the impedance matching method can effectively improve load power and transmission efficiency for middle range wireless power transfer systems with multiple resonators, at distances up to 3 times the coil radius with efficiency more than 70% and load power also close to 3.5 W.
文摘随着医疗技术的不断进步,植入式医疗设备IMD(implantable medical devices)在临床上的应用越来越多。由于传统的电池供电方式会给患者带来额外的组织损伤和手术成本,采用无线电能传输WPT(wireless power transfer)技术对IMD供电将成为今后的趋势。然而,如何在有限的空间内设计出高效率的IMD-WPT系统具有较大的挑战性。为此,对比了5种适用于IMD的WPT技术的性能特点;然后以磁谐振式WPT技术为例,具体介绍了磁谐振式IMD-WPT系统设计中的关键问题;最后结合部分磁谐振式WPT技术在一些典型IMD中的应用现状,讨论了IMD-WPT技术未来的研究方向。
文摘在磁耦合谐振式无线电能传输MCR-WPT(magnetically-coupled resonant wireless power transfer)系统中,线圈作为能量中转的关键环节,其参数的设计决定了系统的传输效率,但目前仍然没有成熟完善的线圈设计方法。将平面螺旋线圈作为研究对象,采用阿基米德螺线方程,建立了精确的数学模型,分析了耦合线圈互感、自感、电阻与线圈几何参数的关系,得到了较为精确的计算方法。通过COMSOL进行仿真验证,在线圈匝间距较小时,各电量计算误差在5%以内。针对给定的限定条件,以线圈传输效率作为优化目标,通过Matlab求解出最优的线圈参数。最后,绕制实际的线圈并由实验测得其最大传输效率超过95%,证明了线圈设计方法的合理性。
