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Adjustable Vibration Exciter Based on Unbalanced Motors.

Volodymyr Osadchyy1, Olena Nazarova1, Taras Hutsol2,3

  • 1Department of Electric Drive and Automation of Industrial Equipment, Zaporizhzhia Polytechnic National University, Zhukovsky, 64, 69-063 Zaporizhzhia, Ukraine.

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Summary

This study introduces an adjustable four-unbalanced vibration exciter system. It uses a closed-loop electric drive to control oscillation amplitude, improving energy efficiency in industrial applications.

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Area of Science:

  • Mechanical Engineering
  • Control Systems Engineering
  • Industrial Automation

Background:

  • Vibration exciters are crucial in various European industries, including metallurgy, mining, construction, food, and chemical processing.
  • Common types include electromagnetic and unbalanced exciters, each with distinct advantages and disadvantages regarding control, energy efficiency, and material consumption.

Purpose of the Study:

  • To develop a method for adjusting the amplitude of unbalanced vibration exciters independently of frequency.
  • To improve the energy efficiency of unbalanced vibration exciters by reducing installed power and compensating for process load effects.
  • To enable precise control over vibration amplitude during operation.

Main Methods:

  • Developed an analytical description for the interaction of rotating unbalances on a movable platform.
  • Created a mathematical model incorporating a frequency-controlled asynchronous electric drive within a closed-loop system.
  • Refined the mathematical model based on physical experiments measuring induction motor transient responses to frequency converter changes.

Main Results:

  • Simulation results confirmed the electric drive's capability to control oscillation amplitude in a four-unbalanced exciter.
  • Physical experiments validated and refined the mathematical model for electric drive dynamics.
  • The proposed control system structure enables an adjustable four-unbalanced vibration exciter using standard asynchronous vibrators.

Conclusions:

  • The developed closed-loop electric drive system effectively controls the oscillation amplitude of unbalanced vibration exciters.
  • This technology offers a pathway to more energy-efficient and adaptable industrial vibration systems.
  • The findings support the use of commercially available asynchronous vibrators for advanced industrial vibration control.