Torsional oscillations associated with the starting of three phase synchronous motors from a single phase supply

Author

Al-Ohaly, A.A. ; Hamouda, R.M. ; Badr, M.A.

Author_Institution

Dept. of Electr. Eng., King Saud Univ., Riyadh, Saudi Arabia

Volume

12

Issue

1

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

10

Lastpage

16

Abstract

Studies have proved that the operation of three phase synchronous motors from a single phase supply is possible. This adds more flexibility to the operation of these motors and extends their field of application. However, previous work carried out in this respect neglected the effect of the torsional dynamics of the motor-load-shaft assembly, that exist particularly with motors driving reciprocating type multi-compressor loads. Such an effect may have damaging consequences when one or more of the natural frequencies of the mechanical system coincides with one or more of the natural frequencies of the electromagnetic torque components. This phenomenon is called electro-mechanical resonance. The main objective of this paper is to take the effect of this phenomenon into consideration through the development of a rigorous mathematical model coupled with a sound digital simulation

Keywords

compressors; machine theory; oscillations; power supplies to apparatus; resonance; starting; synchronous motors; torque; torsion; digital simulation; electro-mechanical resonance; electromagnetic torque components; mathematical model; motor-load-shaft assembly; natural frequencies; reciprocating type multi-compressor loads; single phase supply; starting; three phase synchronous motors; torsional dynamics; torsional oscillations; Assembly; Capacitors; Couplings; Digital simulation; Frequency; Hafnium; Mathematical model; Resonance; Synchronous motors; Torque;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.577274

Filename

577274