Feed Rate
Control Using Current Sensing
The performance of equipment like grinders, sanders, saws, crushers,
compactors, milling machines, etc. can be improved
by adjusting the speed of the feed conveyor in proportion to the load on
the process motor. The feed conveyor slows when the load on the process
motor is heavy and increases when the load is lighter. The load on the
process motor can be monitored with the TCSA 4 to 20 milliamp output,
analog current transducer. The output of the TCSA Series is connected to
an analog input module of the process controller. The process controller
is connected to the variable speed drive that controls the feed conveyor
motor. The TCSA current transducer varies the flow
of current in the 4 to 20 milliamp loop in direct proportion to the AC
current flowing through its isolated current sensor. When the current in
the loop increases, the process controller understands that this means the
load on the process motor is increasing.
It acts to optimize the flow by slowing the feed rate of the feed
conveyor. The TCSA improves the operation of the equipment
by providing reliable closed loop response to the controllers command that
the requested operation is being performed.
The low installed cost of the TCSA Series over the competition makes it
the product of choice for OEM process
equipment designers.
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