Design and Control of Hybrid Electric Power System for a Hydraulically Actuated Excavator
Date Published: 2009-10-06
Paper Number:2009-01-2927
DOI: 10.4271/2009-01-2927
Citation:
Yoo, S., An, S., Park, C., and Kim, N., "Design and Control of Hybrid Electric Power System for a Hydraulically Actuated Excavator," SAE Int. J. Commer. Veh. 2(2):264-273, 2010, doi:10.4271/2009-01-2927.
Author(s):
Seungjin Yoo - Doosan Infracore Co., Ltd.
Sangjun An - Doosan Infracore Co., Ltd.
Cheol-Gyu Park - Doosan Infracore Co., Ltd.
Nagin Kim - Doosan Infracore Co., Ltd.
Abstract:
In this paper, a prototype hybrid excavator that incorporates two electric motors and an ultra-capacitor module in a commercial diesel engine powered hydraulic excavator is presented. The features of the developed hybrid excavator include (1) electric propulsion of the swing system, (2) electric power assistance for the diesel engine and (3) energy regeneration using an ultra-capacitor module. By designing a suitable swing control and power management algorithm, the developed hybrid electric power system can significantly improve the fuel economy of the diesel powered hydraulic excavator, without any performance degradation or drivability deterioration.
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