Variable Speed Commutatorless Energy Converters.

摘要

The theory of three phase squirrel cage induction motors supplied by chopped d.c. supplies is developed. The differential equations are solved by a fourth order Runge-Kutta method explained in the appendix. The waveform of the applied voltage is either square of staircase in shape. The numerical method,specially modified for the application,yields the following results: (a) Current waveshapes in the stator when square wave voltages of 20Hz to 120Hz,and stepped wave voltages of 30to 100Hz,are applied to the stator terminals. (b) The torque variations at different loads and frequencies. (c) The slip variations at different loads and frequencies. (Modified author abatract)