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Lu Z.,Shenzhen Institute of Special Equipment Inspection and Test | Li J.,Zhongshan Polytechnic | Zhou S.,Shenzhen Institute of Information Technology | Kang L.,South China University of Technology
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2013

A braking energy regeneration system is designed based on the lead-acid battery and PMSM system under the vector control. The AC generated by PMSM braking is commutated to DC by the three- phase full-bridge inverter under the SPWM control via -iq, which is then used to recharge the batteries to realize the energy regeneration. The braking energy regeneration system is tested with an electric vehicle and the relationship between the braking current and the electric vehicle speed, braking time or battery discharge depth is analyzed. Results show that the electric vehicle with braking energy regeneration system runs with higher efficiency. Source


Pu H.,South China University of Technology | Xie X.,South China University of Technology | Jia S.,South China University of Technology | Liang G.,Shenzhen Institute of Special Equipment Inspection and Test
Proceedings - International Conference on Electrical and Control Engineering, ICECE 2010 | Year: 2010

Compared with general steel wire rope, the non-rotating rope incurs more inner broken-wires damage, which makes the damage detection difficult. This paper analyzes the causes of the broken-wires damage in non-rotating rope by creating a geometric model. A new method based on support vector machine (SVM) for the detection of the wires damage in non-rotating rope has been proposed, and experimental results show that SVM performs well in the identification of damage. © 2010 IEEE. Source


Pu H.,South China University of Technology | Xie X.,South China University of Technology | Niu G.,South China University of Technology | Liang G.,Shenzhen Institute of Special Equipment Inspection and Test
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2012

A dynamic model for load-lifting system of wire rope was established herein, with which a high precision direct precise integration method was proposed for calculating the dynamic load of the system, and the relationship between dynamic lifting coefficient and rigidity of rigging was discussed. Calculation results show the dynamic characteristics of lifting process truly, and experiments demonstrate that this method, with the advantages of high accuracy, taking less computing time, is simple and effective to analyze the dynamic load of the system in various lifting velocity cases. Source


Pu H.,South China University of Technology | Xie X.,South China University of Technology | Liang G.,Shenzhen Institute of Special Equipment Inspection and Test | Yun X.,Shenzhen Institute of Special Equipment Inspection and Test | Pan H.,Shenzhen Institute of Special Equipment Inspection and Test
Procedia Engineering | Year: 2011

A dynamic model for load-lifting system of the crane was established in this paper, with which a high precision direct precise integration method was proposed for calculating the dynamic loads of the system. The dynamic characteristics of the general crane which used the traditional step speed regulation and advanced crane which used the variable frequency speed control technique were discussed. Calculating results show that the advanced have much smaller dynamic loads than the general in the same case. This method, with the advantages of high accuracy and taking less computing time, is simple and effective to analyze the dynamic characteristics of the crane system. © 2010 Published by Elsevier Ltd. Source


Pu H.-J.,South China University of Technology | Xie X.-P.,South China University of Technology | Jia S.-Y.,South China University of Technology | Liang G.-C.,Shenzhen Institute of Special Equipment Inspection and Test | And 2 more authors.
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2011

Based on the differential geometry and the elastomechanics theory, the physical model and of a non-rotating wire rope under straight tension is established, and the corresponding mechanical equations are deduced. Then, based on the space spiral equations, an entity model of the rope is set up using the three-dimension CAD software ProE and is introduced in ANSYS to carry out mechanical analyses for the verification of the proposed model. It is found that the calculated results obtained by the proposed model are basically consistent with those of the finite element analysis, which means that the proposed model is correct. Source

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