Performance evaluation of two level unidirectional PWM rectifiers employing space vector modulation (SVM) technique

Abstract

Performance evaluation of two levels unidirectional PWM rectifiers employing space vector modulation will be discussed in this proposed work. A methodology for the use of this modulation is proposed and applied in different group of rectifier. For each group of rectifier the converter switching techniques are analyzed to determine switch control signals for space vector modulation. One switching sequence is proposed for all rectifiers in order to minimize the number of switch commutations and reduce the switching losses thereby improving performance of the converter. Switching sequences are determined and performed by a simple space vector pulse width modulation. Two level converter topology is introduced in order to maintain constant output voltage and reduce the number of sensors and controllers. To evaluate the proposed modulation techniques, simulations results have been presented for low and medium power applications.