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| Dynamic bifurcation analysis of electro-mechanical coupled torsional vibration for main transmission system of scraper conveyer driven by permanent magnet motor |
| JU Jinyong1,2,LI Wei1,FAN Mengbao1,WANG Yuqiao1,YANG Xuefeng1 |
1.School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou 221116,China；
2.School of Mechanical and Automotive Engineering,Anhui Polytechnic University,Wuhu 241000,China |
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Abstract It is an effective method to adopt a high-power alternating current (AC) permanent magnet motor to directly drive a scraper conveyer system,decrease its intermediate transmission links and achieve the aim of improving the system reliability and reducing its energy consumption.Here,a scraper conveyer driven by a permanent magnet motor was taken as a study object.Firstly,considering the torsional vibration instability of its main transmission system and its complex electro-mechanical coupled feature,the system’s global electro-mechanical coupled dynamic model was constructed with Lagrange-Maxwell equations.Then,Hopf bifurcation characteristics of the main transmission system under the action of a class of nonlinear friction damping were investigated and the system stable region was obtained with Hurwitz criterion.At the main transmission system’s instability boundary point,the center manifold theory was adopted to reduce the dimension of the system dynamic model,and the relationship between Hopf bifurcation type and nonlinear friction damping coefficient was deduced using the normative theory.The correctness of the theoretical analysis was verified with numerical simulation results.The study results provided a theoretical basis for the stable operation of scraper conveyers driven by permanent magnet motors.
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Received: 26 April 2017
Published: 28 November 2018
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| Cite this article: |
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JU Jinyong1,2,LI Wei1, et al. Dynamic bifurcation analysis of electro-mechanical coupled torsional vibration for main transmission system of scraper conveyer driven by permanent magnet motor[J]. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(23): 52-60.
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| URL: |
| http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2018/V37/I23/52 |
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