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＜departmental bulletin paper＞
Development of a Parallel Hybrid System for Agricultural Tractors

Creator	Creator Name Lee, Dae-Hyun Affiliation Affiliation Name Laboratory of Agricultural Machinery and Production Systems Design, Division of Bioproduction Environmental Sciences, Department of Agro–environmental Sciences Faculty of Agriculture, Kyushu University \| Department of Agricultural Engineering, National Institute of Agricultural Sciences
	Creator Name Kim, Yong-Joo Affiliation Affiliation Name Laboratory of Agricultural Machinery and Production Systems Design, Division of Bioproduction Environmental Sciences, Department of Agro–environmental Sciences Faculty of Agriculture, Kyushu University \| Department of Biosystems Machinery Engineering, Chungnam National University
	Creator Name Choi, Chang-Hyun Affiliation Affiliation Name Laboratory of Agricultural Machinery and Production Systems Design, Division of Bioproduction Environmental Sciences, Department of Agro–environmental Sciences Faculty of Agriculture, Kyushu University \| Department of Bio–mechatronic Engineering, Sungkyunkwan University
	Creator Name Chung, Sun-Ok Affiliation Affiliation Name Laboratory of Agricultural Machinery and Production Systems Design, Division of Bioproduction Environmental Sciences, Department of Agro–environmental Sciences Faculty of Agriculture, Kyushu University \| Department of Biosystems Machinery Engineering, Chungnam National University
	Author PID K001580 Creator Name Inoue, Eiji 井上, 英二イノウエ, エイジ Affiliation Affiliation Name Laboratory of Agricultural Machinery and Production Systems Design, Division of Bioproduction Environmental Sciences, Department of Agro–environmental Sciences Faculty of Agriculture, Kyushu University 農学研究院環境農学部門
	Author PID K001653 Creator Name Okayasu, Takashi 岡安, 崇史オカヤス, タカシ Affiliation Affiliation Name Laboratory of Agricultural Machinery and Production Systems Design, Division of Bioproduction Environmental Sciences, Department of Agro–environmental Sciences Faculty of Agriculture, Kyushu University 農学研究院環境農学部門
Language	English
Publisher	Faculty of Agriculture, Kyushu University
Publisher	九州大学大学院農学研究院
Date	2017-02-24
Source Title	Journal of the Faculty of Agriculture, Kyushu University
Vol	62
Issue	1
First Page	137
Last Page	144
Publication Type	Version of Record
Access Rights	open access
Crossref DOI	https://doi.org/10.5109/1800848

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Details

PISSN	0023-6152
NCID	AA00697606
Record ID	1800848
Peer-Reviewed	Unrefereed
Subject Terms	Parallel hybrid
	Agricultural tractor
	EMG
	power assist
	HCU
ISSN	0023-6152
NCID	AA00697606
Notes	The purpose of this study was to develop parallel hybrid tractor. The hybrid tractor was constructed by adding major components of a hybrid driving system on a tractor. The tractor has 71 kW engine power and the major components included an EMG (electric motor/generator), an inverter, batteries, a battery management system (BMS), and a hybrid control unit (HCU). The hybrid tractor had three control modes: idle, power assist, and battery charge and it were determined by the workload which estimated by measuring engine rotational speed. Performance of the hybrid tractor was evaluated through the field tests of plowing. Performance tests were conducted by comparing the hybrid tractor and the conventional one, and one hybrid tractor was used for the experiment. The hybrid tractor used the hybrid system for the control of EMG, and the conventional tractor was driven by the engine not using the hybrid system. Performances of the hybrid tractor and the conventional tractor were similar at M2 which is low speed condition and it could work with low load, but the performance of the hybrid tractor was better than one of the conventional tractor at higher load condition (M3, M4). Fuel efficiency of the hybrid tractor at M2 was similar with the one of the conventional tractor, but it was lower at M3 and M4 than the one of the conventional tractor by 74%. Considering all results of this study, the developed parallel hybrid tractor is feasible to improve plowing performance of the conventional tractor.
Created Date	2017.03.29
Modified Date	2022.11.11