Multilevel converters for large electric drives

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Description

Traditional two-level high frequency pulse width modulation (PWM) inverters for motor drives have several problems associated with their high frequency switching which produces common-mode voltage and high voltage change (dV/dt) rates to the motor windings. Multilevel inverters solve these problems because their devices can switch at a much lower frequency. Two different multilevel topologies are identified for use as a converter for electric drives, a cascade inverter with separate dc sources and a back-to-back diode clamped converter. The cascade inverter is a natural fit for large automotive all electric drives because of the high VA ratings possible and because it ... continued below

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9 p.

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Tolbert, L. M. & Peng, F. Z. November 1, 1997.

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Description

Traditional two-level high frequency pulse width modulation (PWM) inverters for motor drives have several problems associated with their high frequency switching which produces common-mode voltage and high voltage change (dV/dt) rates to the motor windings. Multilevel inverters solve these problems because their devices can switch at a much lower frequency. Two different multilevel topologies are identified for use as a converter for electric drives, a cascade inverter with separate dc sources and a back-to-back diode clamped converter. The cascade inverter is a natural fit for large automotive all electric drives because of the high VA ratings possible and because it uses several levels of dc voltage sources which would be available from batteries or fuel cells. The back to back diode damped converter is ideal where a source of ac voltage is available such as a hybrid electric vehicle. Simulation and experimental results show the superiority of these two converters over PWM based drives.

Physical Description

9 p.

Notes

OSTI as DE98001911

Source

  • 1998 IEEE applied power electronics conference, Anaheim, CA (United States), 15-19 Feb 1998

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  • Other: DE98001911
  • Report No.: ORNL/CP--95563
  • Report No.: CONF-980207--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 634130
  • Archival Resource Key: ark:/67531/metadc690996

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 3, 2016, 6:30 p.m.

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Tolbert, L. M. & Peng, F. Z. Multilevel converters for large electric drives, article, November 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc690996/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.