Development of an Integrated Electro-Hydraulic Machine to Electrify Off-highway Vehicles
Development of an Integrated Electro-Hydraulic Machine to Electrify Off-highway Vehicles
复制标题
开发用于非公路车辆电气化的集成电液机器
DOI：
10.1109/tia.2022.3189609
复制
发表时间：
2022
影响因子：
4.4
通讯作者：
E. Severson
中科院分区：
文献类型：
--
作者：
F. Nishanth;Garrett R. Bohach;Minal Nahin;James D. Van de ven;E. Severson
由于极高的功率密度要求，非公路车辆的电气化极具挑战性。本文提出并开发了一种与液压泵集成的轴向磁通机器，以实现单个模块化电动液压机器，从而使非公路车辆工具电气化。这种集成机器消除了多余的轴承、联轴器和轴封，重复利用表面，并能够使用液压油直接冷却电机，从而显着提高功率密度。首先使用基于有限元分析的设计优化方法对三种流行的轴向磁通电机变体进行比较。单转子、单定子变体被认为是最有希望与液压泵集成的。接下来，开发完整的集成液压泵和轴向通量机的多物理场框架来表征设计空间。结果表明，该概念在利用传统材料（薄规格硅钢、N45 磁体和漆包铜线）的同时，有望实现整机（电机、液压泵和热管理系统）的效率超过 85%，功率密度超过 5 kW/kg。原型轴向磁通机器已经过实验表征并与液压泵集成，以演示集成电液机器概念。
Electrification of off-highway vehicles is notoriously challenging due to extreme power density requirements. This article proposes and develops an axial flux machine integrated with a hydraulic pump to realize a single modular, electro-hydraulic machine to electrify off-highway vehicle implements. This integrated machine eliminates redundant bearings, couplings, and shaft seals, reuses surfaces, and enables direct cooling of the electric machine with the hydraulic fluid, to significantly increase power density. Three popular axial flux machine variants are first compared using a finite element analysis based design optimization approach. The single rotor, single stator variant is identified to be the most promising for integration with the hydraulic pump. Next, a multiphysics framework of the complete integrated hydraulic pump and axial flux machine is developed to characterize the design space. The results indicate promising potential for this concept to realize efficiency over 85% and power density over 5 kW/kg for the complete machine (electric machine, hydraulic pump, and thermal management system), while utilizing conventional materials (thin gauge silicon steel, N45 magnets, and enamelled copper wire). A prototype axial flux machine has been experimentally characterized and integrated with a hydraulic pump to demonstrate the integrated electro-hydraulic machine concept.