Generator Design Considering Mover Action to Improve Energy Conversion Efficiency in a Free-Piston Engine Generator
Generator Design Considering Mover Action to Improve Energy Conversion Efficiency in a Free-Piston Engine Generator
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DOI：
10.3390/electronics10172142
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发表时间：
2021-09
期刊：
影响因子：
2.9
通讯作者：
Mitsuhide Sato;Shoma Irie;Jianping Zheng;T. Mizuno;F. Nishimura;K. Naganuma
中科院分区：
文献类型：
--
作者：
Mitsuhide Sato;Shoma Irie;Jianping Zheng;T. Mizuno;F. Nishimura;K. Naganuma
在自由活塞式发动机发电机中，发动机的功率可以由线性发电机直接再生，而不需要曲柄。由于发电机的动子与发动机的活塞直接相连，因此该系统的动子运动与发动机及发电效率密切相关。发电机的设计应提高整体能量转换效率。动子的尺寸和质量限制了它的工作行程和驱动频率。在这里，我们提出了一种设计线性发电机和构造FPEG系统的方法，考虑了发动机的动子运行，以提高发动机的效率。我们使用热场和电磁场分析软件评估了动子运行对发动机和发电效率的影响。与只考虑发电效率最大化的发电机相比，本文提出的设计方法提高了总的能量转换效率。为提高发动机效率而设置动子运行，并设计直线发电机来实现运行，可以有效地提高燃料电池的能量转换效率。
In a free-piston engine generator (FPEG), the power of the engine can be directly regenerated by linear generators without a crank. The mover motion of this system is interrelated with engine and power generation efficiencies due to the direct connection between the mover of the generator and the piston of the engine. The generator should be designed to improve the overall energy conversion efficiency. The dimensions and mass of the mover limit its operating stroke and drive frequency. Herein, we propose a method for designing linear generators and constructing FPEG systems, considering the mover operation to improve engine efficiency. We evaluated the effect of mover operation on the engine and generation efficiencies using thermal and electromagnetic field analysis software. The proposed design method improves the overall energy conversion efficiency compared with a generator that considers only the maximization of generation efficiency. Setting the mover operation for higher engine efficiency and designing a linear generator to realize the operation can effectively improve the energy conversion efficiency of FPEGs.