摘要
自谐振线圈(Self-Resonant,SR)因其利用自身寄生电容或杂散电容对电路进行补偿,具有高品质因数、易于集成等优点,在感应式电能传输(Inductive Power Transfer,IPT)领域引起了广泛的研究兴趣。为了进一步提升SR线圈的品质因数Q以增加系统能量传输效率,提出了一种低剖面、结构紧凑的新型单层平面SR线圈,该线圈由两个终端开路的传输线绕制在单层介质板上构成,具有较小的截面。此外,由于电流的分流作用,有效降低了线圈的铜损,提高了SR线圈的传输效率。加工并测试了所提超薄、高Q值SR线圈结构的优化模型,在谐振频率为6.90 MHz的情况下,该线圈具有220的高品质因数。利用所提SR线圈作为收发线圈组成的IPT系统,在两线圈相距50 mm的距离下,线圈间传输效率高达93.5%,DC-DC效率为86%,证明了该线圈良好的传输性能。因所提SR线圈具有低剖面和高传输效率特性,有望在小型消费电子产品和可穿戴输能系统中得到广泛应用。
The self-resonant(SR)coil,with its advantages of high quality factor and easy integration by using its own parasitic capacitance or stray capacitance to compensate the circuit,has aroused extensive research interest in inductive power transfer(IPT)system.In order to further improve the quality factor Q of the SR coil and increase the system's power transfer efficiency,a new type of single-layer planar SR coil with low profile and compact structure is proposed in this paper.The coil is composed of two transmission lines with open ends wound on a single-layer dielectric board with a small cross-section.Furthermore,due to the current splitting effect,the copper loss of the coil is effectively reduced,and the transfer efficiency of the SR coil is improved.The optimized model of the proposed ultra-thin and high-Q SR coil structure is processed and tested.At the resonant frequency of 6.90 MHz,the coil has a high quality factor of 220.Using the proposed SR coil as the transmitting and receiving coils in an IPT system,the transfer efficiency between the coils at a distance of 50 mm is 93.5%,and the DC-DC efficiency can reach 86%,demonstrating the excellent transfer performance of the coil.
出处
《工业控制计算机》
2023年第11期150-152,共3页
Industrial Control Computer
关键词
感应电能传输
自谐振线圈
高功率传输效率
inductive power transfer
self-resonant coil
high power transfer efficiency
