Unfolder-based single-stage AC-AC conversion system
A power converter includes an unfolder connected to a three-phase source and has an output connection with three output terminals. A three-input converter connected to the unfolder produces a quasi-sinusoidal output voltage across converter output terminals. Switches of the converter selectively connect each of the three output terminals across the converter output terminals. A pulse-width modulation 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 at a rate related to 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.
- Research Organization:
- Utah State Univ., Logan, UT (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0008803
- Assignee:
- Utah State University (Logan, UT)
- Patent Number(s):
- 11,736,031
- Application Number:
- 17/968,701
- OSTI ID:
- 2222197
- Resource Relation:
- Patent File Date: 10/18/2022
- Country of Publication:
- United States
- Language:
- English
Power converting apparatus suppressing switching noise by controlling switching operation
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patent | November 2014 |
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