An investigation into pulse-width modulated AC electric drives with open-end winding machines
2013-01
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
An investigation into pulse-width modulated AC electric drives with open-end winding machines
Authors
Published Date
2013-01
Publisher
Type
Thesis or Dissertation
Abstract
Pulse-width modulated (PWM) ac drives have found numerous applications in industry and energy generation. Such drives offer advantages of higher efficiency and a wider range of operation as compared to line-connected machines. There are, however, certain disadvantages associated with PWM ac drives. These drives utilize bulky electrolytic capacitors in their power electronic sections which are costly. Also, the PWM inverter generates a switching common-mode voltage at the machine terminals. This causes spurious ground currents and harmful bearing currents through capacitively coupled paths to ground. Conventional ac machines used in electric drives are either star- or delta-connected and the machine has three terminals which are fed using a power electronic converter. In open-end winding machines, this star or delta connection is opened and the machine now has six terminals. These six terminals are then fed using two three-phase power converters. There are certain advantages to the open-end winding method, such as common-mode voltage reduction and increase in the voltage transfer ratio. Open-end winding ac drives have been investigated in this thesis. Different modulation strategies have been compared for the best performance in term of common-mode characteristics and output waveform quality. The inherent issue of circulating currents has been investigated and solutions have been proposed. Drive structures without dc-link capacitors have been proposed, analysed and their performance has been validated and evaluated.
Keywords
Description
University of Minnesota Ph.D. dissertation. January 2013. Major: Electrical Engineering. Advisor: Prof. Ned Mohan. 1 computer file (PDF); vii, 61 pages.
Related to
Replaces
License
Collections
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Somani, Apurva. (2013). An investigation into pulse-width modulated AC electric drives with open-end winding machines. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/145017.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.