Comparative Evaluation of Y-Inverter against Three-Phase Two-Stage Buck-Boost DC-AC Converter Systems
Comparative Evaluation of Y-Inverter against Three-Phase Two-Stage Buck-Boost DC-AC Converter Systems
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Y 型逆变器与三相两级降压-升压 DC-AC 转换器系统的比较评估
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
J. Kolar
中科院分区：
文献类型：
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作者：
M. Antivachis;D. Bortis;D. Menzi;J. Kolar
现代电机驱动器具有输出滤波功能，以保护电机免受高转换器输出电压Du/dt比率的影响，并为电机提供正弦电流，从而将转子损耗降至最低。将这种电机驱动集成到燃料电池(FC)应用中是具有挑战性的，因为电力电子转换器必须应对FC电压的功率依赖变化。本文对三种候选变流器概念进行了比较分析，即带前端DC-DC Boost变流器的电压型逆变器(Boost VSI)，带前端DC-DC Buck变流器的电流型逆变器(Buck CSI)，以及最近提出的Buck-Boost Y逆变器拓扑。在第一步中，基于基本比例定律来评估三种实现方式，即解析地导出构成总系统损耗和体积的主要部分的半导体损耗和/或所需芯片面积和电感元件体积。在第二步中，通过综合多目标优化来量化不同电机驱动解决方案在效率η和功率密度ρ方面的确切性能。优化结果合理地符合标度律方法，从而进一步验证了解析计算的实用价值。基于标度律的分析和精确的优化都表明，功率密度优势明显有利于Y逆变器。
Modern motor drives feature output filtering capability in order to protect the motor from high converter output voltage du/dt rates and provide a sinusoidal current to the machine in order to minimize the rotor losses. The incorporation of such motor drive into a fuel-cell (FC) application is challenging since the power electronics converter has to cope with the power dependent variation of the FC voltage. In this paper three candidate converter concepts are comparatively evaluated i.e. a voltage source inverter with front-end DC-DC boost converter (boost VSI), a current source inverter with front-end DC-DC buck converter (buck CSI), and the recently proposed buck-boost Y-inverter topology. In a first step, the three implementations are assessed based on fundamental scaling laws, i.e. the semiconductor losses and/or the required chip area and the inductive components volume, which constitute a major part of the total system losses and volume, are analytically derived. In a second step, the exact performance of the different motor drive solutions in terms of efficiency η and power density ρ is quantified by means of a comprehensive multi-objective optimization. The optimization results reasonably mach the scaling-laws approach and hence further verify the practical value of the analytic calculations. Both the scaling-laws based analysis and the accurate optimization indicate a clear power density advantage in favor of the Y-inverter.