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Abstract
We demonstrate a new concept for wireless pulse-width modulation (PWM) control of a parallel dc-dc buck converter. It eliminates the need for multiple physical connections of gating/PWM signals among the distributed converter modules. The new scheme relies on radio-frequency (RF) based communication of the PWM control signals from a master to the slave modules. We analyze the system stability and demonstrate the experimental effectiveness of the wireless control scheme for a two-module parallel buck converter for 10-kHz and 20-kHz switching frequencies and for channel lengths of 1.5 and 15ft, respectively. The proposed control concept may lead to easier distributed control implementation of parallel dc-dc converters and distributed power systems, and may lead to redundancy that is achievable using droop method. It may also be used as a backup for wire-based control of parallel converters to provide fault tolerance.
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