A 5-level flying capacitor multi-level converter with integrated auxiliary power supply and start-up

Andrew Stillwell, C. N. Robert, Pilawa-Podgurski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a 5-level Flying Capacitor Multi-Level (FCML) converter with an integrated auxiliary power converter to supply power to the controller and gate drive circuitry. The auxiliary power converter is sourced from within the FCML converter at a naturally occurring low voltage node, reducing the voltage rating requirements by 75% and thus the size of the auxiliary converter. The auxiliary load current drawn from the FCML converter induces an imbalance in the flying capacitors, which is detrimental to the capacitor and switch ratings if left unchecked. To compensate for this imbalance, an active balancing method is proposed that adjusts the phase and duty cycle of the traditional Phase-Shifted Pulse-Width Modulated (PSPWM) control signals. The active balancing requires a single capacitor voltage measurement, no additional components and proportional control. A start-up circuit is proposed to power the auxiliary power supply and soft-start the FCML converter. Experimental results have been demonstrated with an experimental prototype resulting in excellent flying capacitor balancing and FCML start-up.

Original languageEnglish (US)
Title of host publication2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2932-2938
Number of pages7
ISBN (Electronic)9781509053667
DOIs
StatePublished - May 17 2017
Event32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 - Tampa, United States
Duration: Mar 26 2017Mar 30 2017

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Other

Other32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
CountryUnited States
CityTampa
Period3/26/173/30/17

Fingerprint

Capacitors
Power converters
Voltage measurement
Electric potential
Switches
Controllers
Networks (circuits)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Stillwell, A., Robert, C. N., & Pilawa-Podgurski (2017). A 5-level flying capacitor multi-level converter with integrated auxiliary power supply and start-up. In 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017 (pp. 2932-2938). [7931113] (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2017.7931113

A 5-level flying capacitor multi-level converter with integrated auxiliary power supply and start-up. / Stillwell, Andrew; Robert, C. N.; Pilawa-Podgurski.

2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 2932-2938 7931113 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Stillwell, A, Robert, CN & Pilawa-Podgurski 2017, A 5-level flying capacitor multi-level converter with integrated auxiliary power supply and start-up. in 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017., 7931113, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Institute of Electrical and Electronics Engineers Inc., pp. 2932-2938, 32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017, Tampa, United States, 3/26/17. https://doi.org/10.1109/APEC.2017.7931113
Stillwell A, Robert CN, Pilawa-Podgurski. A 5-level flying capacitor multi-level converter with integrated auxiliary power supply and start-up. In 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017. Institute of Electrical and Electronics Engineers Inc. 2017. p. 2932-2938. 7931113. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). https://doi.org/10.1109/APEC.2017.7931113
Stillwell, Andrew ; Robert, C. N. ; Pilawa-Podgurski. / A 5-level flying capacitor multi-level converter with integrated auxiliary power supply and start-up. 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 2932-2938 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).
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