Abstract
Multilevel inverters (MLIs) have replaced conventional two-level inverters for medium-voltage high-power industrial applications. One of the best modulation techniques for MLIs is the space vector modulation (SVM). Although SVM has its own advantages, it has been overlooked for much simpler carrier-based modulation schemes in the industry. Nearest level modulation (NLM) is a simple alternative, which is functionally similar to SVM. In this paper, a new generalized SVM algorithm is presented, in which the SVM is achieved using the concept of NLM. A generalized switch matrix is introduced to derive gate pulses for the inverter, which further simplifies the algorithm. The algorithm is tested and verified for a three-phase, three-level, and five-level neutral-point-clamped inverters in both simulation and hardware.
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