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http://dx.doi.org/10.3795/KSME-A.2011.35.12.1537

Development of Power Management Strategies for a Compound Hybrid Excavator  

Kim, Hak-Gu (Dept. of Mechanical Engineering, Seoul Nat'l Univ.)
Choi, Jae-Woong (Dept. of Mechanical Engineering, Seoul Nat'l Univ.)
Yoo, Seung-Jin (Doosan Infracore Co.)
Yi, Kyoung-Su (Dept. of Mechanical Engineering, Seoul Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.35, no.12, 2011 , pp. 1537-1542 More about this Journal
Abstract
This paper presents the power management strategies for a compound hybrid excavator. The compound hybrid excavator has been replaced the hydraulic swing motor to the electric swing motor. This excavator requires a proper control algorithm to regulate the energy flow between the mechanical coupling and the electric devices. The controller should improve fuel economy and maintain the super capacitor voltage within a proper range. A thermostat controller and ECMS controller are designed such that these objectives can be achieved. The thermostat controller regulates the power of the engine-assist motor on the basis of the super capacitor voltage, and the ECMS controller determines it using the real-time fuel minimization strategy based on the concept of equivalent fuel. Simulation results showed that by using the hybrid excavator, the fuel economy becomes about 20% higher than that obtained using the conventional excavator and that the ECMS controller outperforms the thermostat controller.
Keywords
Compound Hybrid Excavator; Power Management Strategy; ECMS Strategy;
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  • Reference
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