Simulation of Unsymmetrical 2-Phase Induction Machines

The equations which describe the dynamic performance of unsymmetrical 2-phase induction machines are established, and an analog computer representation is developed from these equations. Computer representations of several single-phase machines including the split-phase, the capacitor-start, and the capacitor-start-capacitor-run types of induction motors are developed by extension and modification of the unsymmetrical 2-phase machine representation. In these simulations, provisions are made for stator switching during the starting period. The results of a computer study which demonstrates the free-acceleration characteristics of the capacitor-start, as well as those of the capacitor-start-capacitor-run single-phase induction motors, are given. Computer results which show the decay of the open-circuit terminal voltage and the instantaneous torque during an opening and reclosing of the main winding are also included.