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Title: Conditional Sixth-Harmonic Injection to Improve the Linear Modulation Range of Three-Phase Voltage-Source Converters

Journal Article · · IEEE Transactions on Power Electronics
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
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Overmodulation techniques are used to improve dc bus voltage utilization for three-phase voltage-source converters (VSCs), resulting in significant reduction in fundamental voltage gain. Conventional pulse width modulation (PWM) techniques for three-phase VSCs cannot enhance the linear range of dc bus utilization by more than 15.5%. Here, in this letter, a conditional sixth-harmonic injection technique is introduced, which can theoretically improve the linear modulation range by up to 19.2% for three-phase ac systems without additional hardware components. Experimental validation of the proposed scheme is presented, with its performance compared against the conventional third-harmonic PWM technique.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Electricity (OE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2472706
Journal Information:
IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 12 Vol. 39; ISSN 0885-8993
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

References (10)

Novel digital continuous control of SVM inverters in the overmodulation range journal January 1997
Carrier-based PWM-VSI overmodulation strategies: analysis, comparison, and design journal July 1998
On continuous control of PWM inverters in the overmodulation range including the six-step mode conference November 1992
Analysis of CM Volt-Second Influence on CM Inductor Saturation and Design for Input EMI Filters in Three-Phase DC-Fed Motor Drive Systems journal July 2010
Space Vector PWM With Reduced Common-Mode Voltage for Five-Phase Induction Motor Drives Operating in Overmodulation Zone journal August 2013
Extending the Linear Modulation Range to the Full Base Speed Using a Single DC-Link Multilevel Inverter With Capacitor-Fed H-Bridges for IM Drives journal July 2017
Investigation on Extending the DC Bus Utilization of a Single-Source Five-Level Inverter With Single Capacitor-Fed H-Bridge Per Phase journal March 2019
A Three-Phase Inverter Based Overmodulation Strategy of Asymmetrical Six-Phase Induction Machine journal May 2021
Carrier-Based PWM Overmodulation Strategies for Five-Phase Inverters journal June 2021
Overmodulation Strategy for Seven-Phase Induction Motors With Optimum Harmonic Voltage Injection Based on Sequential Optimization Scheme journal December 2021

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