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This paper proposes the development of dodecagonal (12-sided) space vector diagrams from cascaded H-Bridge inverters. As already reported in literatures, dodecagonal space vector diagrams have many advantages over conventional hexagonal ones. Some of them include the absence of 6n±1, (n=odd) harmonics from the phase voltage, and the extension of the linear modulation range. In this paper, a new power...
In this paper, a new PWM technique for induction motor drives involving six concentric dodecagonal space vector structures is proposed. Apart from increasing the linear modulation range compared to a hexagonal space vector structure, the proposed configuration helps in total elimination of 5th and 7th order harmonics from the phase voltage throughout the modulation range. Thus, it is possible to operate...
A novel dodecagonal space vector structure for induction motor drive is presented in this paper. It consists of two dodecagons, with the radius of the outer one twice the inner one. Compared to existing dodecagonal space vector structures, to achieve the same PWM output voltage quality, the proposed topology lowers the switching frequency of the inverters and reduces the device ratings to half. At...
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