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A control scheme for mitigating the impact of variations in device parameters for phase-modulated converters
N. Lakshminarasamma,
Published in Institute of Electrical and Electronics Engineers Inc.
2019
Volume: 2018-October
   
Abstract
In the full-bridge converter, DC-current in the transformer exists due to unequal forward voltage drops in the semiconductor devices. A conventional peak current mode control is used to mitigate this DC-current in duty controlled full-bridge converter. In phase-modulated full-bridge converter, unlike duty controlled converter, conventional peak current control is not viable to mitigate the DC-current. A novel control scheme to mitigate this DC-current is proposed which retains the performance characteristics of the converter. With the proposed control scheme, output regulation and DC-current mitigation are implemented in a decoupled manner, therefore output voltage is unaltered during the process of DC-current mitigation. The impact of variations in on-state resistance of the lagging and leading leg MOSFETs on the DC-current magnitude is analyzed. From the analysis, it is observed that the variation in the on-state resistance of the lagging leg MOSFETs causes larger DC-current compared to leading leg. The simulation and experimental results verifying the proposed control scheme is presented. © 2018 IEEE.
About the journal
JournalData powered by TypesetINTELEC, International Telecommunications Energy Conference (Proceedings)
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN02750473
Open AccessNo
Concepts (14)
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    Dc transformers
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    Electric current control
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    Mosfet devices
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    Phase modulation
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    Zero voltage switching
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    DC GAIN
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    FORWARD VOLTAGE DROPS
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    FULL BRIDGE CONVERTERS
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    Novel control scheme
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    PEAK CURRENT CONTROL
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    PEAK CURRENT MODE CONTROL
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    Performance characteristics
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    PHASE MODULATED
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    Power converters