A PWM method for seven-leg inverters supplying three three-phase motors

Industrial robotic systems often require high performance control of a number of converter-fed motors. Although the advantages of using industrial robots during the manufacturing process are numerous the initial capital cost of the robotic system can be prohibitively expensive. One possibility to reduce these costs is to construct the multi-motor drive system using component minimized converters. This article develops a three-motor drive system supplied using a seven-leg voltage source inverter (VSI). The three-motor drive offers a saving of two inverter legs when compared to the standard equivalent triple three-phase VSI topology. It is believed that this supply system is particularly well suited to three-axis robots often found in pick and place applications. The performance of the seven-leg VSI-fed three-motor drive is verified by simulation and experiments using a custom built rig.


Published in:
2008 IEEE Power Electronics Specialists Conference, 2902-2908
Presented at:
2008 IEEE Power Electronics Specialists Conference - PESC 2008, Rhodes, Greece, 15-19 06 2008
Year:
2008
Publisher:
IEEE
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2014-04-15, last modified 2018-10-01

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