NDLI: A two-motor centre-driven winder drive fed by a five-leg voltage source inverter

Content Provider	IEEE Xplore Digital Library
Author	Jones, M. Dujic, D. Levi, E. Bebic, M. Jeftenic, B.
Copyright Year	2007
Description	Author affiliation: Liverpool John Moores Univ., Liverpool (Jones, M.; Dujic, D.; Levi, E.)
Abstract	Recent research has shown that it is possible to independently control two three-phase induction machines while supplying them via a single five-leg voltage source inverter (VSI). In such a two-motor drive system one phase of each motor is connected to a common inverter leg. Major shortcoming of this topology for general-purpose applications is the need to double the DC bus voltage in order to achieve the same speed control range as with the standard dual three-phase VSI topology. Also, the semiconductors of the common leg have to withstand up to twice the operating current of the other inverter legs. This paper investigates the applicability of this topology for a specific constant-power two-motor drive of winder type, where these drawbacks can be to a large extent avoided. In particular, in two-motor centre-driven winders voltage requirements of two machines are hugely different during normal operation of the drive, so that the need for doubling the DC bus voltage does not take place. The current rating of the common leg does not need to be doubled either. Modelling of the centre-driven winder is summarised first. An appropriate PWM method for a two-motor drive with the common inverter leg is developed next, which allows control over how the available DC bus voltage is allocated to the two motors. Description of the five-leg inverter control scheme is further given. Detailed verification of the two-motor drive configuration is provided by simulating the operation of the centre-driven two-motor winder using the standard three-phase inverter topology and comparing the results with those obtained using the five-leg inverter configuration in conjunction with the developed PWM strategy.
Starting Page	1
Ending Page	10
File Size	354874
Page Count	10
File Format	PDF
ISBN	9789275815108
DOI	10.1109/EPE.2007.4417243
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-02
Publisher Place	Denmark
Access Restriction	Subscribed
Rights Holder	EPE Association
Subject Keyword	AC machines Pulse width modulation Converter control DC motors Topology Voltage control Machine vector control Leg Pulse width modulation inverters Pulse width modulation converters Vector control Multi-machine system Induction machines
Content Type	Text
Resource Type	Article

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