Description

This project investigates the performance 3-phase inverter fed to 0.5Hp induction motor (IM) drive system. Generation of SPWM technique using DSP (TMS320F2812). Generation of DSP-based patterns to control voltage source inverters substantially helped the development of modern electric drives used in various applications. A DSP based algorithm to generate sinusoidal PWM signals. The sinusoidal PWM generation algorithm is written in C language so it can be reused easily, in addition to the flexibility it provides in terms of changing the PWM switching frequency and the fundamental frequency of the inverter output voltage. The algorithm development methodology and the experimental results are presented. The V/f-constant (Voltage/Frequency equals to constants) control strategy of three phase AC motor was studied. SPWM (Sinusoidal Pulse Wave Modulation) algorithm was employed to design the open-loop speed control system of three phase AC motor and implement through programming on DSP (Digital Signal Processor) TMS320F2812. The purpose of precise speed control in the system is achieved in range of 30-50Hz.