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Operation Under Fault Conditions of the Stacked Polyphase Bridges Converter
KTH, School of Electrical Engineering (EES). (Electrical Power and Energy Systems)ORCID iD: 0000-0002-0333-9128
KTH, School of Electrical Engineering (EES). (Electrical Power and Energy Systems)ORCID iD: 0000-0002-6283-7661
KTH, School of Electrical Engineering (EES). (Electrical Power and Energy Systems)ORCID iD: 0000-0002-3107-7073
KTH, School of Electrical Engineering (EES). (Electrical Power and Energy Systems)ORCID iD: 0000-0002-1755-1365
2016 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The stacked polyphase bridges converter consists of several submodules that, on the input dc side, all are connected in series. Whereas controller designs presented in previous studies have been found promising for realizing equal voltage sharing between submodules, the survival and stability under fault conditions have not been studied. This paper presents a control strategy that enables survival of the converter after the occurrence of a sudden short circuit of a single transistor switch. The results are verified by simulations.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016.
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-193888DOI: 10.1109/IECON.2016.7793176ISI: 000399031202080Scopus ID: 2-s2.0-85010046684ISBN: 9781509034741 (print)OAI: oai:DiVA.org:kth-193888DiVA, id: diva2:1034149
Conference
The 42nd Annual Conference of the IEEE Industrial Electronics Society (IECON 2016)
Note

QC 20161027

Available from: 2016-10-11 Created: 2016-10-11 Last updated: 2019-04-11Bibliographically approved
In thesis
1. Design, Construction and Evaluation of a StackedPolyphase Bridges Converter for Integrated ElectricDrive Systems in Automotive ApplicationsMOJGAN NIKOUIEDoctoral ThesisStockholm, Sweden
Open this publication in new window or tab >>Design, Construction and Evaluation of a StackedPolyphase Bridges Converter for Integrated ElectricDrive Systems in Automotive ApplicationsMOJGAN NIKOUIEDoctoral ThesisStockholm, Sweden
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents a new concept for integration of the electricdrive system, specifically for electric and hybrid electric vehicle applications.The topology introduces an integration between the so-calledstacked polyphase bridges (SPB) converter and fractional-slot concentratedpermanent-magnet synchronous machine. The SPB converter iscomprised of an arbitrary number of submodules that are connected inseries to a dc-source voltage. A very compact integrated electric drivesystem is gained by the integration. Several advantages are potentiallygained from the concept, such as considerably shortening the powercables interconnecting the converter with the machine and as well asreduction in terms of electromagnetic interference, weight, and size.The principal focus of the thesis is on the design, construction, andcontrol of the SPB converter. Three different generations for the SPBconverter, all with four submodules, have been developed within theproject. In the first two generations, a submodule consists of a two-layerprinted circuit board (PCB) including both power and control circuits,whereas in the third generation, each submodule has separate powerand control boards. The power circuit is a conventional two-level threephaseconverter. In the third generation, the power PCBs can handlean rms current of 100 A and a dc-link voltage of 100 V.Along with the design of the converter, control algorithms have beendeveloped. A conventional proportional–integral (PI) current controlleris implemented on the microprocessor of each control board, on whichouter control loops are added. One important contribution concerningthe control is the stability analysis and balancing controller designresulting thereof. Since the submodules are series connected to the dcsourcevoltage, it is essential to ensure that the total voltage is sharedequally among the submodules.Secondly, a study of the SPB converter under fault is made. It is assumedthat one submodule is facing a short- or open-circuited powertransistor and the behavior of the converter is studied. A proposal fora safe way of short circuiting the faulty submodule is presented.Finally, torque ripple minimization is discussed. It is shown that usingan estimator for the flux linkage harmonics in the machine as well asadding a resonant part to the PI current controller can be an efficientmethod to suppress the ripple.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2019. p. 80
Series
TRITA-EECS-AVL ; 2019:34
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-249383 (URN)978-91-7873-153-4 (ISBN)
Public defence
2019-05-07, Kollegiesalen, Brinellvägen 8, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20190412

Available from: 2019-04-12 Created: 2019-04-11 Last updated: 2019-04-12Bibliographically approved

Open Access in DiVA

fulltext(380 kB)130 downloads
File information
File name FULLTEXT01.pdfFile size 380 kBChecksum SHA-512
97d87f6e414d800db407febff51478c9d64bf39617a2b03a43f4ea786be045a7b72308c222bc4fdc8be4d0cd04fc11a9a3a0ee60bf189aabc5f1742f86ab2f5c
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopushttps://eventegg.com/iecon-2016/

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Nikouei Harnefors, MojganWallmark, OskarHarnefors, LennartNee, Hans-Peter
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