Abstract
This paper presents comparative study of various scalar Pulse Width Modulation (PWM) techniques that are utilized in three-phase drives application. In this paper, various PWM methods are analysed and implemented namely Sinusoidal PWM (SPWM), Zero Sequence PWM (ZSPWM), Conventional Space Vector Modulation (CSVM) and Discontinuous SVM (DSVM). This study includes two new switching sequences referred in this paper as DSVM 15 and Hybrid SVM (HSVM) techniques. Initially, simulation study is carried out with the help of Simulink model. This study includes the effect of different PWM techniques on stator current distortion and switching loss of inverter. Hardware implementations of all mentioned methods, with the help of STM34F407 microcontroller and the auto code generation block set called ‘WAIJUNG’, have been accomplished. Results obtain from the experimentation are compared and analysed on the basis of quality of stator current waveforms and switching losses of inverter.
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