1. Dynamic Characteristics of a Vibration System Excited by Four Induction Motors Rotating in Arbitrary Directions.
- Author
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Kong, Xiangxi, Kong, Fei, Zeng, Fanxing, Wu, Tong, Xu, Qi, and Zhang, Lei
- Subjects
INDUCTION motors ,FREQUENCIES of oscillating systems ,DYNAMICAL systems ,RIGID bodies ,SYNCHRONOUS electric motors ,DYNAMIC models - Abstract
Purpose: Facing the high-power requirements of large-scale or super-scale scale vibratory machines, the multi-machine parallel technology by adding the number of exciters is a feasible solution. In the paper, the self-synchronous characteristics and Sommerfeld effect of a vibration system driven by four non-ideal induction motors rotating in arbitrary directions on a rigid body are investigated to expand the application of the multi-machine parallel technology in large vibratory machines. Methods: The dynamic coupling model of the whole vibration system is established by using the Lagrange method. A modified direct separation of motion method is innovatively applied to transfer the complex synchronous motion problem of four time-varying coupling dynamic systems to that of four time-invariant systems. The synchronization and stability conditions of the modified system are given by using the perturbation method. Results: The Sommerfeld effect and self-synchronization near the natural frequency of the vibration system interact with each other. The synchronous states of four motors will change before and after the natural frequency of the vibration system. The rotating directions of four motors influence the synchronous states of four motors largely. Conclusion: To implement the purpose of enlarge the excitation force by increasing the number of exciters, four motors should work before the system' natural frequency. For vibration attenuation, four motors should work after the system natural frequency and the power of the motors should be very large to avoid the capture of motor speed. Self-synchronization of four motors is helpful for vibration attenuation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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