### Abstract

The paper presents a comparison of phase-shifted and modified level-shifted carrier-based PWM strategies for a three-level H-bridge flying capacitor converter. While the optimal voltage quality of the nearest level switching may be obtained using both of them, natural voltage balancing dynamics is different. Using elementary circuit theory and switched system time domain analysis, it is possible to obtain simple analytical averaged voltage balancing dynamics solutions. Modified level-shifted carrier-based PWM is shown to provide much faster voltage balancing dynamics, especially, for small DC PWM voltage commands and AC PWM modulation indices. The explanation of this fact is obtained by analysis of zero voltage state sequences for different modulation strategies. Relatively fast voltage balancing dynamics rate provided by modified level-shifted carrier-based PWM for zero voltage command makes it possible to implement simple flying capacitors self-precharge procedure at power-up.

Original language | English |
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Title of host publication | Proceedings of the International Conference on Optimisation of Electrical and Electronic Equipment, OPTIM |

Pages | 544-550 |

Number of pages | 7 |

DOIs | |

Publication status | Published - 2010 |

Externally published | Yes |

Event | 2010 12th International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2010 - Brasov Duration: May 20 2010 → May 22 2010 |

### Other

Other | 2010 12th International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2010 |
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City | Brasov |

Period | 5/20/10 → 5/22/10 |

### Fingerprint

### ASJC Scopus subject areas

- Electrical and Electronic Engineering

### Cite this

*Proceedings of the International Conference on Optimisation of Electrical and Electronic Equipment, OPTIM*(pp. 544-550). [5510393] https://doi.org/10.1109/OPTIM.2010.5510393

**Simple comparison of different PWM strategies for a three-level H-bridge flying capacitor converter.** / Ruderman, A.; Reznikov, B.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings of the International Conference on Optimisation of Electrical and Electronic Equipment, OPTIM.*, 5510393, pp. 544-550, 2010 12th International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2010, Brasov, 5/20/10. https://doi.org/10.1109/OPTIM.2010.5510393

}

TY - GEN

T1 - Simple comparison of different PWM strategies for a three-level H-bridge flying capacitor converter

AU - Ruderman, A.

AU - Reznikov, B.

PY - 2010

Y1 - 2010

N2 - The paper presents a comparison of phase-shifted and modified level-shifted carrier-based PWM strategies for a three-level H-bridge flying capacitor converter. While the optimal voltage quality of the nearest level switching may be obtained using both of them, natural voltage balancing dynamics is different. Using elementary circuit theory and switched system time domain analysis, it is possible to obtain simple analytical averaged voltage balancing dynamics solutions. Modified level-shifted carrier-based PWM is shown to provide much faster voltage balancing dynamics, especially, for small DC PWM voltage commands and AC PWM modulation indices. The explanation of this fact is obtained by analysis of zero voltage state sequences for different modulation strategies. Relatively fast voltage balancing dynamics rate provided by modified level-shifted carrier-based PWM for zero voltage command makes it possible to implement simple flying capacitors self-precharge procedure at power-up.

AB - The paper presents a comparison of phase-shifted and modified level-shifted carrier-based PWM strategies for a three-level H-bridge flying capacitor converter. While the optimal voltage quality of the nearest level switching may be obtained using both of them, natural voltage balancing dynamics is different. Using elementary circuit theory and switched system time domain analysis, it is possible to obtain simple analytical averaged voltage balancing dynamics solutions. Modified level-shifted carrier-based PWM is shown to provide much faster voltage balancing dynamics, especially, for small DC PWM voltage commands and AC PWM modulation indices. The explanation of this fact is obtained by analysis of zero voltage state sequences for different modulation strategies. Relatively fast voltage balancing dynamics rate provided by modified level-shifted carrier-based PWM for zero voltage command makes it possible to implement simple flying capacitors self-precharge procedure at power-up.

UR - http://www.scopus.com/inward/record.url?scp=77955758080&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77955758080&partnerID=8YFLogxK

U2 - 10.1109/OPTIM.2010.5510393

DO - 10.1109/OPTIM.2010.5510393

M3 - Conference contribution

AN - SCOPUS:77955758080

SN - 9781424470198

SP - 544

EP - 550

BT - Proceedings of the International Conference on Optimisation of Electrical and Electronic Equipment, OPTIM

ER -