chapt-1 - 1 INTRODUCTION Improvements in fast switching...

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1 1 INTRODUCTION Improvements in fast switching power devices have led to an increased interest in voltage source inverters (VSI) with pulse width modulation control (PWM). Control methods which generate the necessary PWM patterns have been discussed extensively in literature. These could be classified as voltage controlled and current controlled PWM. This thesis deals with voltage control PWM methods. Several voltage controlled PWM methods have been proposed in literature [1,2,4,5,6] e.g., sinusoidal PWM, sinusoidal PWM with third harmonic injection and space vector modulation. All these methods aim at generating a sinusoidal inverter output voltage without low-order harmonics. This is possible if the sampling frequency is high compared to the fundamental output frequency of the inverter. The performance of each of these control methods is usually judged based on the following parameters: a) Total harmonic distortion (THD) of the voltage and current at the output of the inverter, b) Switching losses within the inverter, c) Peak-to-peak ripple in the load current,
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This note was uploaded on 08/10/2011 for the course ETD 201 taught by Professor Dr.nazifi during the Spring '06 term at Alvin CC.

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chapt-1 - 1 INTRODUCTION Improvements in fast switching...

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