The paper deals with the design optimization of voltage source inverter (VSI) fed squirrel cage induction motor. A set of
nine independent variables were selected and to make the machine feasible and practically acceptable, certain constraints
were imposed on the design. Different objective functions were considered, namely, the active material cost, operating
cost, a mixed objective function of the active material cost and operating cost, and the torque pulsation, to facilitate a
suitable design for a given application. In these investigations the sequential unconstrained minimization technique
(SUMT) with interior penalty function approach in conjunction with Rosenbrock’s method of rotating coordinates was
used to optimize the design. The optimized design results of a 7.5kW, delta-connected, voltage source inverter fed cage
motor were given and discussed in detail.
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