【摘要】 IGBT的选择对功率变换器的效率、可靠性和成本均有重要影响,是变换器设计阶段要解决的首要问题。然而,目前在功率变换器的设计中,IGBT及开关频率的选择更多依赖于设计者的经验,缺乏明确的理论依据。为此,该文提出一种新颖的基于多目标优化的电动汽车(EV)变流器设计方法。首先,建立了基于行驶工况的,与变流器损耗、可靠性和成本相关的三个性能评价指标;然后,通过所设计的多目标优化流程,获得了以IGBT和开关频率为设计变量的Pareto最优解集;最后,采用层次分析法选取一个最优解并进行实验验证。更多还原

【Abstract】 The selection of IGBTs is the primary and most important issue in the design stage of power converters, and plays an important role in converter’s efficiency, reliability and cost. However, IGBTs and switching frequency are always chosen approximately and empirically, and there is no clear theoretical basis so far. To solve this problem, a novel optimized design method of EV converters is proposed in this paper. First, three evaluation functions related to energy loss, lifetime and cost are established based on long term driving cycles. Then, the Pareto solution sets of two variables of IGBTs and switching frequency are obtained by the designed multi-objective optimization process. Last, an optimal solution is selected by using hierarchical analysis method and verified by experiments.更多还原