Accession Number : AD0786005

Title :   Variable Speed Commutatorless Energy Converters.

Descriptive Note : Final rept. Sep 71-Dec 73 on Phase A,

Corporate Author : COLORADO UNIV AT BOULDER DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Erdelyi, Edward A. ; Remington, David A.

Report Date : DEC 1973

Pagination or Media Count : 206

Abstract : 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 20 Hz to 120 Hz, and stepped wave voltages of 30 to 100 Hz, are applied to the stator terminals. (b) The troque variations at different loads and frequencies. (c) The slip variations at different loads and frequencies. (Modified author abstract)

Descriptors :   *INDUCTION MOTORS, *VARIABLE SPEED DRIVES, DRIVES, ELECTRICAL EQUIPMENT, NUMERICAL ANALYSIS, COMPUTER PROGRAMS, RUNGE KUTTA METHOD.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE