Comments on "Prediction of Subharmonic Oscillation in Switching Converters Under Different Control Strategies"
For researchers in power electronics, this is an incremental correction of a published error.
This comment identifies and corrects a misapplication of a critical condition in a recent paper on subharmonic oscillation in switching converters, noting that the corrected results are already known from earlier work.
A recent paper [1] (El Aroudi, 2012) misapplied a critical condition (Fang and Abed, 2001) to a well-known example. Even if the mistake is corrected, the results in [1] are applicable only to buck converters and period-doubling bifurcation. Actually, these results are known in Fang's works a decade ago which have broader critical conditions applicable to other converters and bifurcations. The flaws in [1] are identified.