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Analysis of power losses in power MOSFET based stacked polyphase bridges converters
KTH, School of Electrical Engineering (EES), Electric Power and Energy Systems. (Power Electronics)ORCID iD: 0000-0002-6633-8384
KTH, School of Electrical Engineering (EES), Electric Power and Energy Systems.ORCID iD: 0000-0002-8565-4753
KTH, School of Electrical Engineering (EES), Electric Power and Energy Systems.ORCID iD: 0000-0002-6283-7661
2016 (English)In: 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), Institute of Electrical and Electronics Engineers (IEEE), 2016, p. 3050-3055Conference paper, Published paper (Refereed)
Abstract [en]

The ability to accurately predict power semiconductor losses is essential for converter design and can provide a reference for thermal management. Based on a stacked polyphase bridges converter, a simplified but accurate loss model is used in this paper to calculate the power losses of power MOSFETs and experimentally verified. A special focus of the analysis is the ringing loss calculation since it is inevitable in the switching process of power MOSFETs. In addition, this paper presents a comparison of power losses between Si MOSFET and GaN FET based converters by using the analytical model.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2016. p. 3050-3055
Series
IEEE International Power Electronics and Motion Control Conference IPEMC
Keywords [en]
Semiconductor device modeling, MOSFET, power losses
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-196731DOI: 10.1109/IPEMC.2016.7512782ISI: 000390949703035Scopus ID: 2-s2.0-84983268335ISBN: 978-1-5090-1210-7 (print)OAI: oai:DiVA.org:kth-196731DiVA, id: diva2:1047783
Conference
8th IEEE International Power Electronics and Motion Control Conference, IPEMC-ECCE Asia 2016, Hefei, China, 22 May 2016 through 26 May 2016
Note

QC 20161206

Available from: 2016-11-18 Created: 2016-11-18 Last updated: 2017-01-30Bibliographically approved
In thesis
1. Integrated Compact Drives for Electric and Hybrid Electric Vehicles
Open this publication in new window or tab >>Integrated Compact Drives for Electric and Hybrid Electric Vehicles
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

To develop more competitive solutions, one of the trends in the development of drive systems for electric and hybrid electric vehicles (EVs/HEVs) is to integrate the power electronic converter and the electric motor. This thesis aims to investigate the performance and the operation of modular converters in integrated motor drive systems for EVs/HEVs.

In the first part, the concept of integrated modular motor drive systems for EVs/HEVs is introduced. Three suitable modular converter topologies, namely, the stacked polyphase bridges (SPB) converter, the parallel-connected polyphase bridges (PPB) converter and the modular high frequency (MHF) converter, are evaluated and compared with conventional electric drives in terms of power losses, energy storage requirements, and semiconductor costs.

In the second part of the thesis, the harmonic content of the dc-link current of the SPB converter is analyzed. By adopting an interleaving modulation the size of the dc-link capacitor can be reduced without increasing the switching frequency, which is beneficial for achieving a compact integrated system. This method allows for around 80% reduction of the dc-link capacitance for vehicle drives, resulting in a significant size reduction of the power converter and improved integration.

Finally, a communication-based distributed control system for the SPB converter is presented. The communication delay arising from the serial communication is inevitable, thus a timing analysis is also presented. It has been found that stability is maintained even when the baud rate of the SPI communication is lower than 1 Mbps, indicating that other communication protocols with lower bandwidths can also be adopted for this topology.

The analytical investigations provided in this thesis are validated by experiments on a four-submodule laboratory prototype. Experimental results verify the correctness of the theoretical analysis, as well as the dynamic performance of the distributed control system.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2016. p. 123
Series
TRITA-EE, ISSN 1653-5146
Keywords
distributed control, electric vehicle, energy storage capability, integrated motor drive, modular converter, modulation, power losses, stacked polyphase bridges converter, switching frequency
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-196732 (URN)978-91-7729-196-1 (ISBN)
Public defence
2016-12-19, F3, Lindstedtsvägen 26, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20161121

Available from: 2016-11-21 Created: 2016-11-18 Last updated: 2016-11-21Bibliographically approved

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