“…In Section II-B2 of the above article [1], the autocorrelation function r [τ ], which should be calculated through the amplitude of fundamental frequency component (FFC) of source voltage signal, was calculated through the amplitude of FFC of stator current signal by mistake. Because the amount about correction of the wrong part in Section II-B2 is a little big large, we rewrite Section II-B2 as follows:…”