Accession Number : AD0699363

Title :   THEORETICAL INVESTIGATION OF THE PERFORMANCE OF A-C MACHINES.

Descriptive Note : Final rept. Feb 68-Sep 69,

Corporate Author : WASHINGTON UNIV ST LOUIS MO DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Koopman,R. J. W. ; Bhandari,U.

Report Date : SEP 1969

Pagination or Media Count : 184

Abstract : The dynamic performance of a three-phase induction motor is analyzed on a digital computer using a mathematical model proposed by Robertson and Hebbar which gives stator currents without transformation to a new set of axes. Various conditions of operation are analyzed, including unbalance, opening and reclosing of a line, and inputs with high time harmonic content. These capabilities make the method attractive for use in the dynamic analysis of automotive systems using electronic power supplies for induction motor drives. The effect of space harmonics was analyzed by the direct method in which neither rotor nor stator currents are transformed. Because of the difficult computation process involved, the analysis including space harmonics had to be limited to those dynamic cases in which either constant acceleration or constant speed was prescribed. It is suggested that further study be directed toward the effects of space harmonics. (Author)

Descriptors :   (*INDUCTION MOTORS, MATHEMATICAL MODELS), VEHICLES, OPERATION, ALTERNATING CURRENT, TRANSFORMATIONS(MATHEMATICS)

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE