Demonstration of AC machine behavior through interactive color graphics

A microcomputer program that graphically illustrates steady-state polyphase machine behavior under a variety of balanced and unbalanced operating conditions is described. Implemented in the C language, the interactive 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 illustrate dynamically revolving-field concepts, the use of symmetrical components, and the operation of synchronous and induction machines under conditions of sustained electrical unbalance. The motivation for such a program, its operation, and its capabilities are described.<>