Centrifugal Fan
by Jurgen Eckstein

	This component represents a ventilator type load, which is designed
to run with an electric motor.  The only input to the component is the shaft
torque provided by the motor.  The speed, the shaft torque, the mechanical
power and a failure message are outputs.  The failure output is set equal
to one when the fan speed exceeds the maximum permitted speed, otherwise
it is zero.  The first three parameters are the constants of the torque 
speed relation.  Sample input and output are located in the source code.

REF:  Detailed Modeling of Photovoltaic System Components  (Masters Thesis)
      Solar Energy Laboratory  University of Wisconsin at Madison