Master–Slave Current-Sharing Control of a Parallel DC–DC Converter System Over an RF Communication Interface
Mazumder, S.K.
Tahir, M.
Acharya, K.
Univ. of Illinois at Chicago, Chicago;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Jan. 2008
Volume: 55,
Issue: 1
On page(s): 59-66
ISSN: 0278-0046
INSPEC Accession Number: 9742856
Digital Object Identifier: 10.1109/TIE.2007.896138
Current Version Published: 2008-01-04
Abstract
Using analog wireless communication, we demonstrate a master-slave load-sharing control of a parallel dc-dc buck converter system, thereby eliminating the need for physical connection to distribute the control signal among the converter modules. The current reference for the slave modules is provided by the master module using radio-frequency (RF) transmission, thereby ensuring even sharing of the load current. The effect of delay due to RF transmission on system stability and performance is analyzed, and regions of operation for a stable as well as satisfactory performance are determined. We experimentally demonstrate a satisfactory performance of the master-slave converter at 20-kHz switching frequency under steady state as well as transient conditions in the presence of a transmission delay. The proposed control concept, which can potentially attain redundancy that is achievable using a droop method, may lead to more robust and reconfigurable control implementation of distributed converters and power systems. It may also be used as a (fault-tolerant) backup for wire-based control of parallel/distributed converters.
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