A vector control scheme for EV induction motors with a series ironloss model
Jinhwan Jung; Kwanghee Nam
Industrial Electronics, IEEE Transactions on
Volume 45, Issue 4, Aug 1998 Page(s):617 - 624
Digital Object Identifier 10.1109/41.704890
Summary: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
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