Load-Independent Voltage Control for Multiple-Receiver Inductive Power Transfer Systems
Load-Independent Voltage Control for Multiple-Receiver Inductive Power Transfer Systems
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DOI：
10.1109/access.2019.2943541
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发表时间：
2019-09
期刊：
影响因子：
3.9
通讯作者：
Quoc-Trinh Vo;Quang-Thang Duong;M. Okada
中科院分区：
文献类型：
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作者：
Quoc-Trinh Vo;Quang-Thang Duong;M. Okada
本文提出了一种多接收器感应电能传输平台，它能够控制负载电压，以满足个别额定值和稳定的负载电压对负载的变化。在所提出的充电平台中，采用多个发射谐振器来支持电压驱动的源谐振器来操纵朝向各个接收器的能量流。该结构还有助于电压源将恒定电流感应到发射谐振器中，并且因此能够将与负载无关的电压传递到负载。结果，当负载足够大时，负载电压比近似地仅由线圈的互耦确定。这意味着可以通过毫不费力地调整充电平台内的发送谐振器的布置来执行电压控制。电磁仿真和实验结果验证了该系统的电压稳定性和可控性。虽然典型的恒压设计不可避免地会受到效率下降的影响，但我们的方案可以实现高达56°的效率，这对于许多实际应用来说是可以接受的并且足够了。
This paper proposes a multiple-receiver inductive power transfer platform which is capable of controlling the load voltages to satisfy individually rated values and stabilizing the load voltages against the load variations. In the proposed charging platform, multiple transmitting resonators are employed to support a voltage-driven source resonator in manipulating the energy flows toward individual receivers. This structure also helps the voltage source induce constant currents into the transmitting resonators, and therefore, is able to deliver load-independent voltages to the loads. As a result, when the loads are sufficiently large, the load voltage ratio is approximately determined only by the mutual couplings of the coils. This means that the voltage control can be performed by effortlessly adjusting the arrangement of the transmitting resonators inside the charging platform. Electromagnetic simulation and experiment results verify voltage stability and controllability of the proposed system. Although typical constant voltage designs inevitably suffer from efficiency degradation, our scheme can achieve an efficiency of up to 56°, which is acceptable and sufficient for many practical applications.