Interphase Mutual Inductance in Polyphase Inductive Power Transfer Systems
Interphase Mutual Inductance in Polyphase Inductive Power Transfer Systems
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DOI：
10.1109/tie.2009.2020076
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发表时间：
2009-07-01
影响因子：
7.7
通讯作者：
Cvic, Grant A.
中科院分区：
文献类型：
--
作者：
Kissin, Michael L. G.;Boys, John T.;Cvic, Grant A.
具有最小或没有车载能量存储的道路供电电动车辆已经提出多年，但该概念直到最近才通过三相感应电力传输（IPT）系统变得可行。可以创建较宽的区域，在该区域上功率传输相对恒定。这使得拾取器相对于轨道的对准具有良好的容限，从而允许使用简单的低成本拾取器结构。虽然三相IPT轨道使车辆拾取和电力传输更简单，但由于轨道的物理布局导致的轨道相位之间的互耦的存在，它们难以使电源驱动。由于电感器-电容器-电感器网络，这些互感在每个轨道相位内感应电压，导致电源逆变器内的大电流和系统内的不平衡。本文提出了一个分析评估的问题所造成的相间互感，和三种可能的解决方案。两种方法涉及对轨道布局的修改以改变或去除互感，而第三种和优选的技术需要在各个相之间的附加铁氧体磁芯以补偿这种不利的互感，而不影响到拾取负载的功率传输。
Roadway powered electric vehicles with minimal or no onboard energy storage have been proposed for many years, but the concept has only recently become feasible via three-phase inductive power transfer (IPT) systems. A wide zone can be created over which power transfer is relatively constant. This gives good tolerance to the alignment of the pickup relative to the track allowing simple low-cost pickup structures to be used. While three-phase IPT tracks make the vehicle pickup and power transfer simpler, they are difficult for the power supply to drive due to the presence of mutual coupling between the track phases resulting from the physical layout of the track. These mutual inductances induce voltages within each track phase that, because of the inductor-capacitor-inductor network, cause large currents within the power supply inverter and imbalances within the system. This paper presents an analytical assessment of the problems caused by the interphase mutual inductance, and three possible solutions. Two of the methods involve modifications to the track layout to alter or remove the mutual inductances, while the third and preferred technique requires additional ferrite cores between the various phases to compensate this adverse mutual inductance without affecting the power transfer to the pickup loads.