Affiliations: Science and Technology on Vehicular Transmission Laboratory, Beijing Institute of Technology, Beijing, China
Correspondence:
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Corresponding author: Jibin Hu, Science and Technology on Vehicular Transmission Laboratory, Beijing Institute of Technology, Haidian, Beijing 100081, China. Tel.: +86 010 6891 8494; E-mail:hujibin@bit.edu.cn
Abstract: Permanent magnet synchronous motor is an
electromechanical coupled system. Electromagnetic field can result in change
of the dynamic behaviors of the PMSM's rotor system. Here, changes to the
electromagnetic torque excitation caused by the torsional displacement are
considered using electromechanical coupled dynamic equations for the rotor.
Steady state solutions and their stability are determined. Effects of inner
power factor angle, pole pairs, saturation coefficient and torsional
stiffness of shaft are investigated. Also, numerical integration is used to
validate and carry out perturbation results. Based on the results, amplitude
jump and bifurcation instability phenomenon can be avoided through
reasonable control of permanent magnet synchronous motors, electromagnetic
and mechanical parameters design and consequently control the torsional
vibration of PMSM's rotor system.
