Analysis of Induction Machines in Dynamic Systems

Modern controlled semiconductors and their use in inverters and cycloconverters have resulted in the frequent application of induction machines in variable speed drive systems. Consequently, a need has arisen to develop simulation techniques for studying induction machines as components in controlled drives. An analog computer simulation together with its associated 2-phase voltage generator is described. The complete system is responsive to a single dc input signal which controls both speed and direction of rotation of the motor by controlling its frequency, voltage, and phase sequence. Regulators, timing circuits, and other actual system components are easily introduced into the control loop of the simulation. Typical results of the study of a position controlled induction motor drive are given.