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This paper focuses on the analysis of a seven-phase voltage-source inverter for high-performance motor drives. The problem of the modulation strategy of the inverter is solved by combining the multiple space vector representation with traditional carrier-based pulsewidth modulation. This approach leads to the definition of a general modulation strategy that can be usefully utilized in multimotor drives,...
The paper reports the results of an experimental investigation of a five-phase two-motor drive system, consisting of a parallel connection of two induction machines (IM). Thanks to an appropriate connection of the motors, two machines are controlled independently although a single five-phase voltage source inverter (VSI) is used as the supply. An overview of the operating principles is provided first...
One of the advantages of multi-phase machine variable-speed drives is the possibility of disturbance-free mode of operation when one or more phases are lost during normal operation. This requires the modification of the control algorithm in post-fault operation. This paper investigates the use of multidimensional space vector PWM technique to synthesise required voltages for the disturbance-free mode...
Two series-connected two-motor drive systems with a single inverter supply have been proposed recently. The first one consists of two five-phase machines supplied from a single five-phase inverter, while the second one comprises one symmetrical six-phase machine, a three-phase machine and a single six-phase inverter. It has been verified experimentally that, by introducing an appropriate phase transposition...
The paper reports the results of an experimental investigation of a multi-phase two-motor drive system, consisting of a series connection of a five-phase induction machine (IM) and a five-phase synchronous reluctance machine (Syn-Rel). The two machines are controlled independently although a single five-phase voltage source inverter is used as the supply. A brief overview of the operating principles...
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