INSTRUCTIONS:

• The top-left-hand corner, labelled Controls, contains four controls that you can use to change parameters in the simulation.
• The top-right-hand corner, labelled Schematic, displays the components of the motor-load system and the connections between them.
• The bottom-left-hand corner, labelled Parameters, contains the displays of the measuring instruments connected to the simulation. The instruments (ammeter, voltmeter, torquemeter, tachometer, ohmmeter, and tachogenerator) are colour-coded to represent their location in the schematic (top-right display).
• The bottom-right-hand corner, labelled Graph, displays a graph of motor-torque vs. speed and load-torque vs. speed.

• The top-most slider represents an ac controller, which changes the voltage setting of the power supply. To move the slider, click and hold the slider and then move it in the desired direction.
• The middle slider represents a frequency changer, which changes the frequency setting of the power supply.
• The bottom slider affects the amount to which a damper is lowered in the output vent, which affects the load on the motor.
• Underneath the bottom slider is a row of four buttons; pressing one of these buttons will change the NEMA motor class of the motor in the system.

ABOUT PIM-SIM:

PIM-SIM (Polyphase Induction Motor Simulation) simulates a simple motor-load system where voltage is applied to a motor in order to drive a fan. By manipulating the frequency and voltage of the ac power supply connected to the motor, you can observe the effect of these parameters on the system's performance. You can also control a damper in the fan's output vent, which affects the load on the motor.