Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Power Current Control of a Resonant Vibratory Conveyor Having Electromagnetic Drive

  • Despotovic, Zeljko V. (Mihajlo Pupin Institute, University of the Belgrade) ;
  • Ribic, Aleksandar I. (Mihajlo Pupin Institute, University of the Belgrade) ;
  • Sinik, Vladimir M. (Technical Faculty "Mihajlo Pupin" Zrenjanin, University of the Novi Sad)
  • Received : 2011.05.19
  • Published : 2012.07.20
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Abstract

The vibratory conveyors with electromagnetic drive are used for performing gravimetric flow of granular materials in processing industry. By realizing free vibrations of variable intensity and frequency over a wide range through application of the electromagnetic actuator, suitable power converter, and the corresponding controller, continuous conveyance of granular materials have been provided for various operating conditions. Standard power output stages intended for control of vibratory conveyance using thyristors and triacs. Phase angle control can only accomplish tuning of amplitude oscillations, but oscillation frequency cannot be adjusted by these converters. Application of current controlled transistor converters enables accomplishing the amplitude and/or frequency control. Their use implies the excitation of a vibratory conveyor independent of the supply network frequency. In addition, the frequency control ensures operation in the region of mechanical resonance. Operation in this region is favourable from the energy point of view, since it requires minimal energy consumption. The paper presents a possible solution and advantages of the amplitude-frequency control of vibratory conveyors by means of a current controlled power converter.

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