Modeling and simulation of high frequency effects of a separately excited DC motor

Author

Cheng, DKW ; Lee, CK

Author_Institution

Dept. of Electron. Eng., Hong Kong Polytech., Hung Hom, Hong Kong

fYear

1991

fDate

16-17 Jun 1991

Firstpage

192

Abstract

The frequency response of a DC motor armature winding is measured up to 10MHz. It is found that, at high frequencies the winding stops behaving like a complex RL circuit. The impedance magnitude drops sharply and the phase delay reduces. The equivalent circuit of the winding is modeled by lumped circuit impedance obtained by the curve fitting method using the software package MATLAB. Such an extension of the frequency range helps the designer to find the optimal switching frequency of a PWM drive for a DC motor. The model is verified by comparison of the SPICE simulation result of a PWM driven separately excited DC motor with experimental results

Keywords

DC motors; equivalent circuits; machine theory; machine windings; modelling; power engineering computing; 10 MHz; MATLAB; PWM drive; SPICE simulation; armature winding; complex RL circuit; curve fitting method; equivalent circuit; frequency response; high frequency effects; impedance magnitude; lumped circuit impedance; optimal switching frequency; phase delay; separately excited DC motor; software package; Circuit simulation; Curve fitting; DC motors; Delay; Equivalent circuits; Frequency measurement; Frequency response; Impedance; Mathematical model; Pulse width modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1991. Conference Proceedings, China., 1991 International Conference on

Conference_Location

Shenzhen

Type

conf

DOI

10.1109/CICCAS.1991.184316

Filename

184316