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Title: System and method for optimizing fundamental frequency modulation for a cascaded multilevel inverter

A system and a method for optimizing fundamental frequency modulation in a cascaded multilevel inverter (CMI) are provided. The CMI includes at least a first H-bridge module and a second H-bridge module connected in series with the first H-bridge module. The first H-bridge module is operated according to a first duty cycle and the second H-bridge module is operated according to a second duty cycle. The first duty cycle is greater than the second duty cycle. The first and second H-bridge modules are controlled utilizing fundamental frequency modulation. A portion of the first duty cycle is transferred to the second duty cycle thereby optimizing fundamental frequency modulation by at least improving power sharing between the first and second H-bridge modules and improving equalization of DC capacitor currents and voltage ripples while maintaining the same fundamental modulation to the output voltage waveform.
Inventors:
;
Issue Date:
OSTI Identifier:
1464120
Assignee:
Board of Trustees of Michigan State University (East Lansing, MI) ARPA-E
Patent Number(s):
10,033,263
Application Number:
15/188,218
Contract Number:
AR0000222
Resource Relation:
Patent File Date: 2016 Jun 21
Research Org:
Board of Trustees of Michigan State University, East Lansing, MI (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 47 OTHER INSTRUMENTATION

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