This paper presents the need of speed control in
induction motor, high processing speed and the control accuracy
of the DSP which allows sophisticated control technique to be
used to build the circuit. Out of different controlling methods
voltage/frequency control has proven to be the most versatile.
The control circuit designed is realized on a digital signal
processor TMS320F28335 development board based on v/f
which is specially designed to have an accurate control on the
three phase induction motor. The controller in the circuit
consists of faster generation of the voltage and frequency inputs
of sine wave in PWM. The inner sine generation using the
voltage and frequency components, the speed control of a three
phase induction motor can be handled accurately and a
smoother control can be obtained. Three phase inverter is used
to convert the PWM signal from the digital signal processor to
analog signal. For this the 3 phase MOSFET inverter is designed
with the gate driver. The experimental results for the speed (v/f)
control of the three phase induction motor drive controlled by a
digital signal processor TMS320F28335 chip has been observed