High power density by combining of a double stator and an opposite-magnets linear generator in a dual-type free-piston engine generator
High power density by combining of a double stator and an opposite-magnets linear generator in a dual-type free-piston engine generator
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DOI：
10.3233/jae-190158
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发表时间：
2020
影响因子：
0.6
通讯作者：
Mitsuhide Sato;M. Nirei;Y. Yamanaka;Y. Bu;T. Mizuno
中科院分区：
文献类型：
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作者：
Mitsuhide Sato;M. Nirei;Y. Yamanaka;Y. Bu;T. Mizuno
基于自由活塞发动机的直线发电机系统有望成为串联混合动力汽车的高效发电发动机。然而，发动机发电机必须在有限的安装空间内产生驱动汽车所需的非常高的功率。因此，考虑到车载情况，需要通过减小发电机尺寸和提高效率来实现更高的功率密度。本文研究了一种用于自由活塞发动机的对向永磁体圆柱双定子直线同步发电机。双定子实现了更小的尺寸，并且使用相反的磁铁获得了比单定子更大的推力常数。在有限元分析中，与相同尺寸的表面磁体类型相比，高效率区域扩大了。此外，本文还通过对一个双面发动机模型的仿真，阐明了采用最大功率控制提高功率密度的有效性。
A linear generator system based on a free-piston engine is expected to be a highly efficient power-generation engine for series hybrid vehicles. However, the engine generator must produce in a limited installation space the very high power required to drive a car. Consequently, considering the car-mounting situation, higher power density is required by means of reduced generator size and higher efficiency. In this paper, a cylindrical double-stator linear synchronous generator with opposing permanent magnets is used for free-piston engine. The double stator realizes smaller size, and using opposing magnets achieves a larger thrust constant than that with a single stator. In a finite-element analysis, the high-efficiency area is expanded compared to a surface-magnet type of the same size. Furthermore, this paper clarifies the effectiveness for improved power density with maximum-generation control in a simulation of a dual-sided engine model.