Primary Current Generation for a Contactless Power Transfer System Using Free Oscillation and Energy Injection Control
Primary Current Generation for a Contactless Power Transfer System Using Free Oscillation and Energy Injection Control
复制标题
DOI：
10.6113/jpe.2011.11.3.256
复制
发表时间：
2011-05
影响因子：
1.4
通讯作者：
H. Li;A. Hu;G. Covic
中科院分区：
文献类型：
--
作者：
H. Li;A. Hu;G. Covic
本文利用自由振荡和能量注入原理，在非接触电能传输系统的主轨道中产生和控制高频电流。这里，主功率逆变器保持自然谐振，同时确保主轨道中的电流幅值接近恒定，如多个独立负载所需。这种能量注入控制器具有较低的开关频率，并通过检测高频电流来实现ZCS（零电流开关），因此逆变器的开关应力、功率损耗和EMI较低。研究了具有多个拾取器的非接触式功率传输系统的示例全桥拓扑。理论分析、仿真和实验结果表明，该系统具有快速、平稳的启动瞬态响应。输出轨道电流是完全可控的，具有足够好的波形，用于非接触式电力传输应用。
This paper utilizes free oscillation and energy injection principles to generate and control the high frequency current in the primary track of a contactless power transfer system. Here the primary power inverter maintains natural resonance while ensuring near constant current magnitude in the primary track as required for multiple independent loads. Such energy injection controllers exhibit low switching frequency and achieve ZCS (Zero Current Switching) by detecting the high frequency current, thus the switching stress, power losses and EMI of the inverter are low. An example full bridge topology is investigated for a contactless power transfer system with multiple pickups. Theoretical analysis, simulation and experimental results show that the proposed system has a fast and smooth start-up transient response. The output track current is fully controllable with a sufficiently good waveform for contactless power transfer applications.