Multiple Output Inductive Charger for Electric Vehicles
Multiple Output Inductive Charger for Electric Vehicles
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DOI：
10.1109/tpel.2018.2882945
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发表时间：
2019-08
影响因子：
6.7
通讯作者：
Van-Binh Vu;V. Phan;M. Dahidah;V. Pickert
中科院分区：
文献类型：
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作者：
Van-Binh Vu;V. Phan;M. Dahidah;V. Pickert
多输出充电器由于其在成本、功率密度和安装空间等方面的优势，已被广泛应用于各种电子设备中。相反，与导电充电器相比，感应功率传输（IPT）更安全、更方便，因此在电动汽车（ev）上得到了越来越多的应用。然而，利用IPT系统对多输出充电器进行电动汽车充电的研究工作却很少。本文提出了一种多输出IPT充电器的新概念，该充电器只需在一次侧采用一个全桥逆变器，结合多个发射机，即可对多个输出电池独立同时充电。分析了两种可能的ipt线圈结构，确定了忽略交叉耦合的各通道线圈之间的最小距离。为了使系统的主逆变器达到零相角（ZPA）条件，提出了两种方案。第一种选择是在精确的ZPA频率上操作每个输出通道的补偿槽。另一种选择是让一个通道在其输入阻抗的感应区工作，而另一个通道在电容区工作。通过适当的设计，可以使这两个油箱的无功功率几乎相互抵消，从而使逆变器电流的相位与输入电压接近同相。我们会比较两种建议的方案，以根据不同应用的要求，建议选择方案1或方案2。为了简化控制复杂度，对IPT输出电流源拓扑进行了选择、比较和分析，构建了上述两种方案下的多输出系统。采用双面LCC和串并联拓扑来分别演示选项1和2的建议思想。为了验证该方法的可行性和有效性，给出了总输出功率为1.5 kW的两个输出通道的实验结果。实验结果表明，即使在不同的负载条件下，采用上述两种方案的主逆变器也能达到ZPA。在讨论部分中，将对传统和拟议的IPT收费结构在成本、可靠性和复杂性方面进行一些比较。
Multiple output chargers have widely been adopted in various electronic devices due to their benefit concerning cost, power density, and space for installation. On the contrary, inductive power transfer (IPT) has been applied increasingly in electric vehicles (EVs) since it is safer and more convenient as compared to conductive chargers. However, research works on multiple output chargers using an IPT system for EV charging applications are rarely presented. This paper proposes a new concept of a multiple output IPT charger, which can charge several output batteries independently and simultaneously by adopting only one full bridge inverter at the primary side combining with multiple transmitters. A total of two possible IPT-coil structures are analyzed, and the minimum distance between each channel's coils is determined to neglect the cross-coupling between them. A total of two options are proposed to attain a zero phase angle (ZPA) condition for the primary inverter of the proposed system. First option is to operate the compensation tanks of every output channel at exact ZPA frequencies. The other option is to let one channel work in the inductive region of its input impedance and other channel work in the capacitive region. By adopting an appropriate design, the reactive powers of these tanks can be nearly canceled by each other and the phase of inverter current can be nearly in-phase with the input voltage as a result. A total of two proposed options are compared to give recommendation whether option 1 or 2 should be selected according to various applications’ requirements. To simplify control complexity, IPT output current sources topologies are selected, compared, and analyzed to construct the proposed multiple output system in both above-mentioned options. Double-sided LCC and series–parallel topologies are adopted to demonstrate the proposed idea for options 1 and 2, respectively. In order to verify feasibility and validity of the proposed method, experimental results of two output channels with the total output power of 1.5 kW are provided. Experimental results indicate that the ZPA is achieved for the primary inverter with both of the above-mentioned options even under different load conditions. Some comparisons between the conventional and the proposed IPT charging structure in terms of cost, reliability, and complexity are included in the discussion section.