Decoupled PI Controllers Based on Pulse-Frequency Modulation for Current Sharing in Multi-Phase LLC Resonant Converters

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dc.contributor.authorMoreno, M.
dc.contributor.authorPereda Torres, Javier Eduardo
dc.contributor.authorRojas, F.
dc.contributor.authorDominguez-Lopez, I.
dc.date.accessioned2022-05-20T13:51:19Z
dc.date.available2022-05-20T13:51:19Z
dc.date.issued2021
dc.description.abstractThe LLC series resonant converter has emerged as a solution to applications requiring power conversion with isolation, reduced volume and high efficiency, such as PV systems and EV chargers. However, the LLC resonant converter is limited in power, so it requires a multi-phase configuration in order to provide higher currents. This configuration connects the outputs of two or more LLC converters in parallel, increasing the output current but introducing imbalance and circulating currents due to the mismatch and tolerance values of components in each resonant tank. This paper proposes a simple PI control scheme to compensate the current imbalance and eliminate circulating currents generated when several LLC resonant converters are connected in parallel. Unlike reported current sharing methods, the proposed control scheme is based on multiple current control loops operating independently, using the switching frequency of each parallel-connected unit as a degree of freedom of the overall converter. The proposed control scheme has been successfully validated under simulations and experimental assessment, implementing two resonant tanks with ±5% tolerance of parameters, providing excellent steady-state and transient performance.
dc.fechaingreso.objetodigital2024-05-23
dc.fuente.origenIEEE
dc.identifier.doi10.1109/ACCESS.2021.3053171
dc.identifier.issn2169-3536
dc.identifier.urihttps://doi.org/10.1109/ACCESS.2021.3053171
dc.identifier.urihttps://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9328774
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/64209
dc.information.autorucEscuela de Ingeniería ; Pereda Torres, Javier Eduardo ; S/I ; 131481
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final15294
dc.pagina.inicio15283
dc.revistaIEEE Access
dc.rightsacceso abierto
dc.subjectResonant converters
dc.subjectResonant frequency
dc.subjectFrequency modulation
dc.subjectFrequency conversion
dc.subjectImpedance
dc.subjectSwitching frequency
dc.subjectSteady-state
dc.titleDecoupled PI Controllers Based on Pulse-Frequency Modulation for Current Sharing in Multi-Phase LLC Resonant Converters
dc.typeartículo
dc.volumen9
sipa.codpersvinculados131481
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