Electromagnetic
vibrating feeders are equipped with electromagnetic drives which
generate vibrations required for conveying of material.
The electromagnetic drives are robust in construction with very
high reliability factor. These conveyors come with a
specially designed controller required for operation of the
electromagnetic conveyor. These controllers convert the
input AC supply voltage into pulsating DC output which results
in generation of vibrations. A thyristor such as a silicon
controlled rectifier is used for this purpose. The fringe
angle of the SCR can be varied sleeplessly using a potentiometer
or an analogous electrical signal / PLC signal from an external
command variable unit, which in turn increases / decreases the
amplitude of vibrations thereby controlling the output of the
conveyor as required.
As in the case of
electromechanical feeders depending on the material conveyed,
the conveyors can be supplied on two types viz, through type and
tubular type. Suitable liners in case of through conveyors
are provided where severely abrasive materials are handled as in
the case of electromechanical conveyors. |
