The sub models include induction motor direct quadrature-model and a voltage source inverter fed by SPWM signal generator. To address this issue, this work presents an approach to implement the mathematical model of a Sinusoidal Pulse Width Modulation (SPWM) fed three-phase induction motor drive in MATLAB Simulink. One must develop the understanding of the mathematical equations to be used and also having the knowledge to solve the equations with the use of computer simulation software. However, developing such models are not as simple. In the study of induction motor drive operation, mathematical models are often used to simulate the steady state and transient behavior of induction motor. With recent advancement in semiconductor technologies, the use of fixed speed induction motor drive is becoming obsolete, majority of the applications now requires inverter-based drives for variable speed operation. Three-phase induction motors are used in a vast area of applications mainly due to their simplicity, ruggedness and high reliability.
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