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Title: A Control Scheme to Mitigate the Dead-Time Effects in a Wireless Power Transfer System

Abstract

In practice, a dead-time is always provided between the complementary switching instances of the inverter phase-leg devices. At higher operating frequencies, the dead-time issues in wireless power transfer (WPT) systems become critical, especially as the power level increases. In certain operating conditions, the dead-time effect in wireless power transfer system affects the switching characteristics. Consequently, the switching losses in the power semiconductor devices increase and also impact the efficiency of the overall system. In this paper, a simple control scheme is proposed to eliminate the dead-time effect (or voltage polarity reversal) in the WPT inverter. The proposed control scheme monitors the inverter output voltage, and the switching frequency is auto-tuned to eliminate the undesired switching instances in the inverter voltage. The proposed control scheme is validated using the closed-loop simulations in PLECS, and the experimental results on a 5.6 kW WPT prototype are also presented. After eliminating the voltage-polarity-reversal at the inverter output, the inverter losses were reduced by ~40%, and the overall system losses were reduced by ~17%.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]
  1. ORNL
  2. Tennessee Technological University, Cookeville TN
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1649391
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: IEEE Applied Power Electronics Conference and Exposition (APEC) , New Orleans, Louisiana, United States of America, 3/15/2020-3/19/2020
Country of Publication:
United States
Language:
English

Citation Formats

Kavimandan, Utkarsh, Galigekere, Veda Prakash, Onar, Omer, Ozpineci, Burak, and Mahajan, Satish M. A Control Scheme to Mitigate the Dead-Time Effects in a Wireless Power Transfer System. United States: N. p., 2020. Web. doi:10.1109/APEC39645.2020.9124590.
Kavimandan, Utkarsh, Galigekere, Veda Prakash, Onar, Omer, Ozpineci, Burak, & Mahajan, Satish M. A Control Scheme to Mitigate the Dead-Time Effects in a Wireless Power Transfer System. United States. https://doi.org/10.1109/APEC39645.2020.9124590
Kavimandan, Utkarsh, Galigekere, Veda Prakash, Onar, Omer, Ozpineci, Burak, and Mahajan, Satish M. 2020. "A Control Scheme to Mitigate the Dead-Time Effects in a Wireless Power Transfer System". United States. https://doi.org/10.1109/APEC39645.2020.9124590. https://www.osti.gov/servlets/purl/1649391.
@article{osti_1649391,
title = {A Control Scheme to Mitigate the Dead-Time Effects in a Wireless Power Transfer System},
author = {Kavimandan, Utkarsh and Galigekere, Veda Prakash and Onar, Omer and Ozpineci, Burak and Mahajan, Satish M.},
abstractNote = {In practice, a dead-time is always provided between the complementary switching instances of the inverter phase-leg devices. At higher operating frequencies, the dead-time issues in wireless power transfer (WPT) systems become critical, especially as the power level increases. In certain operating conditions, the dead-time effect in wireless power transfer system affects the switching characteristics. Consequently, the switching losses in the power semiconductor devices increase and also impact the efficiency of the overall system. In this paper, a simple control scheme is proposed to eliminate the dead-time effect (or voltage polarity reversal) in the WPT inverter. The proposed control scheme monitors the inverter output voltage, and the switching frequency is auto-tuned to eliminate the undesired switching instances in the inverter voltage. The proposed control scheme is validated using the closed-loop simulations in PLECS, and the experimental results on a 5.6 kW WPT prototype are also presented. After eliminating the voltage-polarity-reversal at the inverter output, the inverter losses were reduced by ~40%, and the overall system losses were reduced by ~17%.},
doi = {10.1109/APEC39645.2020.9124590},
url = {https://www.osti.gov/biblio/1649391}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2020},
month = {Sun Mar 01 00:00:00 EST 2020}
}

Conference:
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