Electric vehicle (EV) motors are characterized by their low inductance and high current density, so that they run at high speed and produce a high starting torque. Due to the low inductance coil design, the current ripple caused by pulsewidth modulation (PWM) switching makes a significant amount of eddy-current loss and hysteresis loss, especially in high-speed operation. If one simply neglects the iron loss, the overall vector controller is detuned, resulting in an error in the torque control. The iron loss is modeled, in general, by a parallel resistor RM to the magnetizing inductor LM. The authors propose a series R-L model that accounts for the effects of the iron loss. A major advantage of the series model is that it does not increase the number of state variables in developing a vector control. In this paper, they derive a rotor-flux-oriented flux error, orientation angle error, and torque error caused by iron loss. Finally, they demonstrate the effectiveness of the proposed control method through computer simulation and experimental results.
A vector control scheme for EV induction motors with a series iron loss model
IEEE Transactions on Industrial Electronics ; 45 , 4 ; 617-624
1998
8 Seiten, 8 Quellen
Aufsatz (Zeitschrift)
Englisch
Elektrofahrzeug , Asynchronmotor , Maschinentheorie , Straßenverkehr , Start , Verkehrslenkung , Geschwindigkeitsregelung , Stromdichte , Induktivität , Anlaufmoment , rechnerunterstützte Regelungsanalyse , Regelungssynthese , rechnerunterstützte Elektromaschinenanalyse , Maschinensteuerung , Maschinenprüfung
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