A comprehensive interactive microcomputer capability for demonstrating AC machine operation

A software package is described for graphically and analytically demonstrating the steady-state behavior of polyphase machines under a variety of operating conditions. Implemented in the C language, the program employs sophisticated screen color graphics to show the slow-motion progression of the appropriate voltage or current waves, the loci of the resulting magnetic fields, and the movement of the machine rotor. It can be used to dynamically illustrate revolving-field concepts, the use of symmetrical components, and the effects of synchronous machine torque angle and induction machine slip. Screen movement can be frozen and significant numerical values displayed at any point during program use. The user may specify stator voltages or currents with any degree of unbalance. The neutral connection is arbitrary and can be altered during program execution. Input data may be specified or altered interactively. The program is completely menu-driven and interactive, and contains help commands and instructions which enable it to be used without additional documentation