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Asymmetrical multilevel inverter for large induction machine drives

Publications associées (36)

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Dc bus utilisation in multiphase VSI supplied drives with a composite stator phase number

Drazen Dujic

Multiphase variable-speed drives are typically supplied from a two-level voltage source inverter (VSI). The number of phases of the machine and hence the legs of the inverter can be either a prime or a composite number. Limits of the dc bus utilisation in ...

IEEE2010

Current ripple in inverter-fed five-phase drives with space-vector PWM

Drazen Dujic

A number of PWM techniques have been developed in recent times for five-phase voltage source inverters (VSIs), which enable sinusoidal output voltage generation. Relatively little attention has been however paid to the current ripple caused by these PWM me ...

IEEE2010

A General PWM Method for a (2n + 1)-Leg Inverter Supplying n Three-Phase Machines

Drazen Dujic

Control of an ac machine requires only two currents. It is, therefore, possible to achieve independent control of a number of three-phase machines using various inverter topologies with a reduced switch count. One such drive system comprises n three-phase ...

Institute of Electrical and Electronics Engineers2009

The Impact of inverter dead time on performance of n-motor drives supplied from (2n+1)-leg VSI

Drazen Dujic

Industrial applications often require two or more variable-speed electric drives, which have to be controlled independently. Over the past decade research efforts have been made to reduce the number of power electronic devices required in multi-motor drive ...

IEEE2009

Dead-Time Effects in Voltage Source Inverter Fed Multi-Phase AC Motor Drives and Their Compensation

Drazen Dujic

Inverter dead-time effects have been investigated in detail in the past for three-phase drives supplied from a three-phase voltage source inverter (VSI). A similar study has never been conducted in conjunction with multi-phase (more than three phases) driv ...

2009

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In the frame of the European project UNIFLEX-PM, two AC/AC converter topologies hove been studied and implemented. Both converters, rated for 25 kVA, are isolated by a medium-frequency power transformer. The first topology is based on a dual active bridge ...

2009

A two-motor centre-driven winder drive with a reduced switch count

Drazen Dujic

Industrial applications often require two (or more) variable speed electric drives, which have to be controlled independently. An example is a centre-driven two-motor winder, where ac machines are traditionally supplied from their individual three-phase vo ...

IEEE2008

Five-leg inverter PWM technique for reduced switch count two-motor constant power applications

Drazen Dujic

Industrial applications often require a number of variable speed electric drives. In the majority of cases, these multi-motor drive systems require independent control of individual motors. Over the past decade, research efforts have been made to reduce th ...

2008

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-b ...

Institute of Electrical and Electronics Engineers2008

An improved PWM method for a five-leg inverter supplying two three-phase motors

Drazen Dujic

Component minimized multi-machine drives have recently become an area of much research interest. One such drive comprises two three-phase induction motors supplied by a five-leg voltage source inverter. With only five legs available to supply two three-pha ...

IEEE2008