Unfolder-based single-stage AC-AC conversion system
Abstract
An power converter includes an unfolder connected to a three-phase source and has an output connection with a positive terminal, a negative terminal and a neutral terminal. The unfolder creates two unipolar piece-wise sinusoidal DC voltage waveforms offset by a half of a period. A three-input converter connected to the unfolder produces a quasi-sinusoidal output voltage across output terminals. Switches of the converter selectively connect the positive, negative and neutral inputs across the output terminals. A PWM controller controls a first duty ratio and a second duty ratio for the converter based on a phase angle of the source and a modulation index generated from an error signal related to a control variable. The duty ratios are time varying with a fundamental frequency of the source. The modulation index relates to output voltage of the converter, peak voltage or current of the source and/or peak current at the output terminals.
- Inventors:
- Issue Date:
- Research Org.:
- Utah State Univ., Logan, UT (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1998367
- Patent Number(s):
- 11646671
- Application Number:
- 17/499,735
- Assignee:
- Utah State University (Logan, UT)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- DOE Contract Number:
- EE0008803
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 10/12/2021
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Teeneti, Chakridhar Reddy, Zane, Regan A., Wang, Hongjie, and Yelaverthi, Dorai Babu. Unfolder-based single-stage AC-AC conversion system. United States: N. p., 2023.
Web.
Teeneti, Chakridhar Reddy, Zane, Regan A., Wang, Hongjie, & Yelaverthi, Dorai Babu. Unfolder-based single-stage AC-AC conversion system. United States.
Teeneti, Chakridhar Reddy, Zane, Regan A., Wang, Hongjie, and Yelaverthi, Dorai Babu. Tue .
"Unfolder-based single-stage AC-AC conversion system". United States. https://www.osti.gov/servlets/purl/1998367.
@article{osti_1998367,
title = {Unfolder-based single-stage AC-AC conversion system},
author = {Teeneti, Chakridhar Reddy and Zane, Regan A. and Wang, Hongjie and Yelaverthi, Dorai Babu},
abstractNote = {An power converter includes an unfolder connected to a three-phase source and has an output connection with a positive terminal, a negative terminal and a neutral terminal. The unfolder creates two unipolar piece-wise sinusoidal DC voltage waveforms offset by a half of a period. A three-input converter connected to the unfolder produces a quasi-sinusoidal output voltage across output terminals. Switches of the converter selectively connect the positive, negative and neutral inputs across the output terminals. A PWM controller controls a first duty ratio and a second duty ratio for the converter based on a phase angle of the source and a modulation index generated from an error signal related to a control variable. The duty ratios are time varying with a fundamental frequency of the source. The modulation index relates to output voltage of the converter, peak voltage or current of the source and/or peak current at the output terminals.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2023},
month = {5}
}
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