SWITCHING POWER SUPPLY DEVICE
PROBLEM TO BE SOLVED: To provide a switching power supply device and a method of controlling the same, capable of detecting frequency characteristics of an output filter including an external capacitor, and of automatically adjusting control response characteristics of a feedback loop.SOLUTION: A sw...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a switching power supply device and a method of controlling the same, capable of detecting frequency characteristics of an output filter including an external capacitor, and of automatically adjusting control response characteristics of a feedback loop.SOLUTION: A switching power supply device comprises: a drive pulse output circuit 36 outputting an analysis drive pulse Vg (B) so that voltage fluctuation caused by frequency characteristics of an output filter 12 appears in an output voltage Vo during a filter characteristic analysis time period; filter characteristic analysis means 40 acquiring time series data of the output voltage Vo at the time when the analysis drive pulse Vg (B) is outputted, and analyzing the frequency characteristics of the output filter 12 on the basis of the acquired output voltage time series data; and control response characteristic determination means 42 determining control response characteristics for a part other than the output filter 12, of a feedback loop, on the basis of the analysis result of the filter characteristic analysis means 40. The drive pulse output circuit 36 outputs a normal operation drive pulse Vg (T) on the basis of the control response characteristics determined after the filter characteristic analysis time period.
【課題】外部コンデンサを含む出力フィルタの周波数特性を検出し、フィードバックループの制御応答特性を自動調節できるスイッチング電源装置及びその制御方法を提供する。【解決手段】フィルタ特性分析期間中に出力電圧Voに出力フィルタ12の周波数特性による電圧変動が現れるように分析用駆動パルスVg(B)を出力する駆動パルス出力回路36を備える。分析用駆動パルスVg(B)が出力されたときの出力電圧Voの時系列データを取得し、取得した出力電圧時系列データに基づいて出力フィルタ12の周波数特性を分析するフィルタ特性分析手段40を備える。フィルタ特性分析手段40の分析結果に基づいて、フィードバックループの出力フィルタ12以外の部分の制御応答特性を決定する制御応答特性決定手段42を備える。駆動パルス出力回路36は、フィルタ特性分析期間の後決定された制御応答特性に基づいて通常動作用駆動パルスVg(T)を出力する。【選択図】図1 |
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