MODELING OF THREE PHASE VSI USING AN EFFICIENT SVPWM TECHNIQUE AND ITS ANALYSIS

The Voltage source inverters (VSI) give desirable inverter output voltages and control the drives in most medium and large power applications. The inverter outputs are influenced by Pulse width modulation (PWM) methods. The space vector-PWM (SVPWM) is one of the most effective switching control strategies used to control inverter outputs. In this article, an efficient SVPWM technique is modeled and used in two-level Three-Phase VSI. The SVPWM module mainly consists of an Angle generation unit (AGU) using Phase-locked Loop (PLL), Sector generation unit (SGU), time duration module (TDM), Switching time generation (STG) Module, and lastly, SVPWM gate pulse generation (GPG) module. The SVPWM techniques generate six gate pulses and are used in VSI. The Three-Phase VSI is modeled using SVPWM and generates the Line and phase voltage for the given Load. The simulation results of each SVPWM are analyzed, and VSI generates the line and phases voltage output waveforms. The THD of 29.63% is achieved at Modulation index 0.99 with a 425.5V peak output voltage.