Vibrating conveyor
AssigneeABB Schweiz AG
InventorsSverre Faureholm Jensen, Thomas Norby, Mike Gornitzka
Life of this patent
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Abstract
For tuning a vibrating conveyor having an electric vibrator that drives a vibration element connected to a conveying unit of the vibrating conveyor for oscillating the conveying unit to a mechanical resonance frequency fR of the vibrating conveyor, an electric drive unit varies the frequency fv of a AC drive voltage (uv) in a given frequency range, measures a current consumption of the electric vibrator unit for different applied frequencies fv of the AC drive voltage (uv) and using the frequency fv with the lowest current consumption of the electric vibrator unit as frequency fv of the AC drive voltage (uv) for operating the vibrating conveyor.
Claims10
A method for controlling the oscillation of a vibrating conveyor, the vibrating conveyor including a vibration element, an oscillation conveyor coupled to the vibration element, and an electric vibrator arranged to vibrate the vibration element, the method comprising:
- supplying the electric vibrator with an AC drive voltage having an initial frequency;
- tuning the initial frequency of the AC drive voltage to an unknown mechanical resonance frequency of the vibrating conveyor;
- wherein the tuning of the initial frequency of the AC drive voltage to the unknown mechanical resonance frequency of the vibrating conveyor comprises:
- varying the initial frequency of the AC drive voltage in a given frequency range,
- measuring an electric current consumption of the electric vibrator for different frequencies within the given frequency range, and
- using one of the different frequencies within the given frequency range with the lowest electric current consumption of the electric vibrator as a tuned frequency of the AC drive voltage for operating the vibrating conveyor.
A vibrating conveyor comprising:
- a vibration element;
- a conveying unit coupled to the vibration unit;
- an electric vibrator arranged to drive the vibration element, which oscillates the conveying unit;
- and
- an electric drive, which comprises a current measurement sensor, the electric drive being supplied with a supply voltage from a supply grid and being arranged to supply the electric vibrator with an AC drive voltage with a frequency tuned to an unknown mechanical resonance frequency for oscillating the conveying unit,
- wherein the electric drive is structured to supply the electric vibrator with the AC drive voltage with an initial frequency that is tunable to the unknown mechanical resonance frequency of the vibrating conveyor by varying the initial frequency in a given frequency range while the electric drive is supplied with the supply voltage from the supply grid, to measure an electric current consumption of the electric vibrator with the current measurement sensor for the different frequencies in the given frequency range, and to use, as a tuned frequency of the AC drive voltage, one of the different frequencies with the lowest electric current consumption of the electric vibrator unit for operating the vibrating conveyor.
Dependencies are inferred from the claim text.