Title :
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
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;
Conference_Titel :
Circuits and Systems, 1991. Conference Proceedings, China., 1991 International Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CICCAS.1991.184316
