Nonlinear Dynamics of Permanent-magnet Synchronous Motor with v/f Control |
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Authors: | WEI Du-Qu ZHANG Bo LUO Xiao-Shu QIU Dong-Yuan |
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Affiliation: | 1. College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China;2. Power Electric College, South China University of Technology, Guangzhou 510640, China |
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Abstract: | The nonlinear dynamics of permanent-magnet synchronous motor(PMSM) with v/f control signals is investigated intensively.First,the equilibria and steady-state characteristics of the system are formulated by analytical analysis.Then,some of its basic dynamical properties,such as characteristic eigenvalues,Lyapunov exponents and phase trajectories are studied by varying the values of system parameters.It is found that when the values of the system parameters are smaller,the PMSM operates in stable domains,no matter what the values of control gains are.With the values of parameters increasing,the unstability appears and PMSM falls into chaotic operation.Furthermore,the complex dynamic behaviors are verified by means of simulation. |
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Keywords: | chaos the largest Lyapunov exponent phase trajectory permanent-magnet synchronous motor |
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