The working condition property of the hydraulic excavator was analyzed based on the 15 second typical operating cycle. The mathematical model of power source in parallel hybrid hydraulic excavator was established. An optimal set of power source parameters in parallel hybrid hydraulic excavator was proposed. Then the generator/motor efficiencies of the space vector pulse width modulation (SVPWM)-controlled permanent magnet synchronous motor (PMSM) and the charge/discharge efficiencies of the NiMH battery were analyzed under the same circumstance as well as the dynamic response characteristic including motor speed, motor torque and battery SOC. Simulation results show that the optimal set of power source in powertrain can satisfy the requirement of power and energy transformation efficiency for hydraulic excavator, and help achieve better fuel consumption with hybrid configuration. Furthermore the battery system was only treated as a media to transform energy. The more energy-saving and higher efficient control for the hydraulic excavator was achieved.
［1］ KAGOSHIMA M, SORA T, KOMIYAMA M. Development of hybrid power train control system for excavator［C］//JSAE Annual Congress. Japan: ［s.n.］,2003： 16.
［2］ NANJO T, IMANISHI E, KAGOSHIMA M. Power simulation for energy saving in hybrid excavator［J］. JSAE Transaction, 2004, 47 (44): 101106.
［3］ 肖清,王庆丰,张彦廷,等.液压挖掘机混合动力系统建模及控制策略研究［J］.浙江大学学报:工学版,2007,41（3）： 480483,528.
XIAO Qing, WANG Qing-feng, ZHANG Yan-ting, et al. Study on modeling and control strategy of hybrid system in hydraulic excavator［J］.Journal of Zhejiang Univeristy: Engineering Science, 2007, 41(3): 480483,528.
［4］ SCHOUTEN N J, SALMAN M A, KHEIR N A. Fuzzy logic control for parallel hybrid vehicles［J］.IEEE Transactions on Control Systems Technology, 2002,10(3): 460468.
［5］ POURSAMAD A,MONTAZERI M. Design of genetic-fuzzy control strategy for parallel hybrid electric vehicles［J］.Control Engineering Practice, 2008, 16(7): 861873.
［6］ FENG Qi-shan, ZHANG Jian-wu, YIN Cheng-liang. Modeling and implementation of speed governor for the hybrid electric vehicle engine［J］.Chinese Journal of Mechanical Engineering,2005,18(4): 605611.
［7］ PLETT G L. Extended Kalman filtering for battery management systems of LiPB-based HEV battery packs［J］. Journal of Power Source, 2004, 134(2): 262276.
［8］ VASEBI A,PARTOVIBAKHSH M,BATHAEE S M T. A novel combined battery model for state-of-charge estimation in lead-acid batteries based on extended Kalman filter for hybrid electric vehicle applications［J］. Journal of Power Source, 2007,174： 3040.
［9］ 林伟杰.永磁同步电机伺服系统控制策略的研究［D］.杭州：浙江大学,2005: 3144.
LIN Wei-jie. Research on control strategy of permanent magnet synchronous motor servo system［D］.Hangzhou: Zhejiang University,2005: 3144.
［10］ 张兴,张崇巍.PWM可逆变流器空间电压矢量控制技术的研究［J］.中国电机工程学报,2001,21（10）: 102105.
ZHANG Xing,ZHANG Chong-wei. Study on a new space voltage vector control method about reversible PWM converter［J］.Proceedings of the CSEE,2001,21(10): 102105.
［11］ 何继爱,王惠琴.永磁同步电机空间矢量控制系统的仿真［J］.电力系统及其自动化学报,2005,17（6）：1416,38.
HE Ji-ai,WANG Hui-qin.Simulation of PMSM controlled by space vector PWM［J］. Proceedings of the CSU-EPSA, 2005,17(6): 1416,38.
