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Title: Self-balanced modulation and magnetic rebalancing method for parallel multilevel inverters

Abstract

A self-balanced modulation method and a closed-loop magnetic flux rebalancing control method for parallel multilevel inverters. The combination of the two methods provides for balancing of the magnetic flux of the inter-cell transformers (ICTs) of the parallel multilevel inverters without deteriorating the quality of the output voltage. In various embodiments a parallel multi-level inverter modulator is provide including a multi-channel comparator to generate a multiplexed digitized ideal waveform for a parallel multi-level inverter and a finite state machine (FSM) module coupled to the parallel multi-channel comparator, the FSM module to receive the multiplexed digitized ideal waveform and to generate a pulse width modulated gate-drive signal for each switching device of the parallel multi-level inverter. The system and method provides for optimization of the output voltage spectrum without influence the magnetic balancing.

Inventors:
;
Publication Date:
Research Org.:
The Florida State University Research Foundation, Inc., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1410507
Patent Number(s):
9,831,800
Application Number:
15/297,828
Assignee:
The Florida State University Research Foundation, Inc. (Tallahassee, FL) DOEEE
DOE Contract Number:  
EE0006521
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Oct 19
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 24 POWER TRANSMISSION AND DISTRIBUTION

Citation Formats

Li, Hui, and Shi, Yanjun. Self-balanced modulation and magnetic rebalancing method for parallel multilevel inverters. United States: N. p., 2017. Web.
Li, Hui, & Shi, Yanjun. Self-balanced modulation and magnetic rebalancing method for parallel multilevel inverters. United States.
Li, Hui, and Shi, Yanjun. Tue . "Self-balanced modulation and magnetic rebalancing method for parallel multilevel inverters". United States. doi:. https://www.osti.gov/servlets/purl/1410507.
@article{osti_1410507,
title = {Self-balanced modulation and magnetic rebalancing method for parallel multilevel inverters},
author = {Li, Hui and Shi, Yanjun},
abstractNote = {A self-balanced modulation method and a closed-loop magnetic flux rebalancing control method for parallel multilevel inverters. The combination of the two methods provides for balancing of the magnetic flux of the inter-cell transformers (ICTs) of the parallel multilevel inverters without deteriorating the quality of the output voltage. In various embodiments a parallel multi-level inverter modulator is provide including a multi-channel comparator to generate a multiplexed digitized ideal waveform for a parallel multi-level inverter and a finite state machine (FSM) module coupled to the parallel multi-channel comparator, the FSM module to receive the multiplexed digitized ideal waveform and to generate a pulse width modulated gate-drive signal for each switching device of the parallel multi-level inverter. The system and method provides for optimization of the output voltage spectrum without influence the magnetic balancing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 28 00:00:00 EST 2017},
month = {Tue Nov 28 00:00:00 EST 2017}
}

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