Efficiency Evaluation of 2L and 3L SiC-Based Traction Inverters for 400V and 800V Electric Vehicle Powertrains
Efficiency Evaluation of 2L and 3L SiC-Based Traction Inverters for 400V and 800V Electric Vehicle Powertrains
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适用于 400V 和 800V 电动汽车动力系统的 2L 和 3L SiC 牵引逆变器的效率评估
DOI：
10.1109/itec51675.2021.9490082
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
J. Bauman
中科院分区：
文献类型：
--
作者：
Wesam Taha;B. Nahid;J. Bauman
本文介绍了三种碳化硅（SiC）逆变器拓扑的效率评估：两电平（2L）电压源逆变器（VSI）、3L中点钳位（NPC）和3L T型逆变器。它们的效率是针对额定值为400 V和800 V的动力系统进行评估的，并使用额定值为650 V和1200 V的SiC MOSFET器件，以30 kHz的开关频率工作。首先，在每单位尺度上，在不同的操作负载电流下评估效率。其次，效率曲线映射到120 kW内置永磁（IPM）电机的转矩-速度2D地图。第三，将所得的效率图用于电动汽车（EV）模型，以研究三种逆变器在标准驱动循环下的性能。在车辆级，使用所研究的逆变器的车辆的能量消耗进行了分析。结果表明，3L SiC逆变器在800 V动力总成中最具竞争力。与VSI相比，NPC和T型可分别节省0.6%和1.2%的能耗。在400 V下，只有T型比VSI节能0.9%。
This paper presents an efficiency evaluation of three silicon carbide (SiC) inverter topologies: two-level (2L) voltage source inverter (VSI), 3L neutral-point clamped (NPC), and 3L T-type inverter. Their efficiency is evaluated for powertrains rated at 400 V and 800 V, and using SiC MOSFET devices rated at 650 V and 1200 V operating at a switching frequency of 30 kHz. Firstly, the efficiency is evaluated at different operating load currents, on a per-unit scale. Secondly, the efficiency curves are mapped into torque-speed 2D maps of 120 kW interior permanent magnet (IPM) motors. Thirdly, the resulting efficiency maps are employed in an electric vehicle (EV) model, in order to study the performance of the three inverters on standard drive cycles. At the vehicle level, the energy consumption of the vehicle using the studied inverters is analyzed. It is found that 3L SiC-based inverters are most competitive in the 800 V powertrain. When compared to VSI, NPC and T-type offer 0.6% and 1.2% energy consumption savings. In 400 V, only T-type enjoys 0.9% energy savings over VSI.