A nearly constant switching frequency current hysteresis controller with generalized parabolic boundaries using 12-sided polygonal voltage space vectors for IM drives

Azeez, Najath Abdul; Dey, Anubrata; Mathew, K.; Mathew, Jaison; Gopakumar, K.

doi:10.1109/icelmach.2012.6349969

Cited by 2 publications

(1 citation statement)

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“…In a dodecagonal voltage space vector structure, fifth and seventh harmonics (dominant in the phase voltages especially during over modulation operation of hexagonal space vector switching) can be completely eliminated [8]- [12]. An improvement over standard topologies by adding additional number of cascaded H-Bridges without increasing the number of DC sources is proposed in [13].…”

Section: Introductionmentioning

confidence: 99%

A 19 level dodecagonal voltage space vector structure for medium voltage IM drive

Kaarthik

Gopakumar

Cecati

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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In this paper, a nineteen level dodecagonal voltage space vector structure is proposed for the first time, by cascading two asymmetric three level inverters with isolated H-Bridges. The dodecagonal structure is made possible by proper selection of DC link voltages and switching states of the inverters. The proposed scheme retains all the advantages of multilevel topologies as well the advantages of dodecagonal voltage space vector structure. A generic and simple method for calculation of PWM timings is proposed. Also, a new method of switching technique is proposed, which ensures minimum switching while maintaining the linearity between modulating signals and the output phase voltages. Extensive simulation and experimental results have been presented for validation of the proposed concept.

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Section: Introductionmentioning

confidence: 99%