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In this paper, a novel multiphase multilevel open-end winding (OeW) drive is presented. The topology employs one three-level and one two-level voltage source inverter (VSI) to supply a five-phase OeW machine. Three-level VSI operates with low switching frequency, while the second inverter is used to mitigate unwanted low-order harmonics. Proposed drive requires one dc source only, for three-level...
A new multilevel five-phase open-end winding drive topology is proposed and analysed in this paper. The topology consists of an induction machine with open-end windings, supplied with one three-level and one two-level voltage source inverters (VSIs). The two inverters are fully isolated with dc-link voltages in a ratio 2:1, which results in performance equivalent to that of a four-level five-phase...
Two four-level five-phase open-end winding drives are analysed in this paper, and their performances compared. The first topology consists of two two-level voltage source inverters (VSI) supplying a five-phase machine with open-end windings (OeW). The second topology comprises one three-level and one two-level VSI to supply the five-phase OeW machine. In both cases, two VSIs are supplied from isolated...
In this paper, pulse width modulation (PWM) of a five-phase multilevel open-end winding drive with two inverters supplied with unequal dc-link voltages is analysed. In particular, the effects of dead time on the drive performance are discussed. They are a consequence of PWM switching of both inverters at the same time, which happens to be an inevitable part of the modulation strategy. Detailed analysis...
A four-level five-phase open-end winding drive topology is introduced in the paper. The system comprises a five-phase induction machine with an open-end stator winding, supplied using two two-level voltage source inverters with isolated and unequal dc-link voltages, in the ratio 2:1. The topology offers the advantages of a modular structure with fewer semiconductor components and has a greater potential...
A hybrid three-phase rectifier with switched current injection device and high frequency switching current injection network is analyzed in this paper. The rectifier applies suboptimal current injection. Optimization of the injected current amplitude is performed, resulting in the minimum of the input current THD of 4.36%. Ratings of applied semiconductor devices are derived. Effects caused by finite...
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