JP2009079956A - トラッキング電流検出装置 - Google Patents
トラッキング電流検出装置 Download PDFInfo
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- JP2009079956A JP2009079956A JP2007248412A JP2007248412A JP2009079956A JP 2009079956 A JP2009079956 A JP 2009079956A JP 2007248412 A JP2007248412 A JP 2007248412A JP 2007248412 A JP2007248412 A JP 2007248412A JP 2009079956 A JP2009079956 A JP 2009079956A
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Abstract
【解決手段】検出の判定要素に電流の高調波次数成分の変化量を含むようにした。
【選択図】図1
Description
2・・・変流器
3・・・入力回路
4・・・フィルター回路(FFT解析回路)
5・・・演算回路
6・・・出力回路
Claims (4)
- 検出の判定要素に電流の高調波次数成分の変化量を含むことを特徴とするトラッキング電流検出装置。
- 電路の電流波形を検出する手段と,所定の第一の時間間隔毎に前記電流波形から複数の任意の高調波次数成分を抽出する手段と,前記第一の時間間隔のN倍の第二の時間間隔毎に,前記電流の大きさに関連する第一のパラメータと前記複数の任意の高調波次数成分の変化に関連する第二のパラメータの比を元にしてトラッキングの発生を判定する演算手段を含むことを特徴とする請求項1記載のトラッキング電流検出装置。
- 前記の複数の任意の高調波次数成分を抽出する手段は,次数毎のバンドパスフィルターであることを特徴とする請求項2記載のトラッキング電流検出装置。
- 前記の複数の任意の高調波次数成分を抽出する手段は,FFT解析による演算手段であることを特徴とする請求項2記載のトラッキング電流検出装置。
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JP2007248412A JP2009079956A (ja) | 2007-09-26 | 2007-09-26 | トラッキング電流検出装置 |
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JP2007248412A JP2009079956A (ja) | 2007-09-26 | 2007-09-26 | トラッキング電流検出装置 |
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JP2009079956A true JP2009079956A (ja) | 2009-04-16 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61217773A (ja) * | 1985-03-22 | 1986-09-27 | Fuji Electric Co Ltd | 耐ア−ク性試験装置 |
JPH06250139A (ja) * | 1993-02-23 | 1994-09-09 | Casio Comput Co Ltd | 液晶表示パネルの検査方法 |
JPH0787661A (ja) * | 1993-09-13 | 1995-03-31 | Omron Corp | 保護継電器および試験器ならびに試験システム |
JP2007113960A (ja) * | 2005-10-18 | 2007-05-10 | Kawamura Electric Inc | トラッキング検出装置 |
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2007
- 2007-09-26 JP JP2007248412A patent/JP2009079956A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61217773A (ja) * | 1985-03-22 | 1986-09-27 | Fuji Electric Co Ltd | 耐ア−ク性試験装置 |
JPH06250139A (ja) * | 1993-02-23 | 1994-09-09 | Casio Comput Co Ltd | 液晶表示パネルの検査方法 |
JPH0787661A (ja) * | 1993-09-13 | 1995-03-31 | Omron Corp | 保護継電器および試験器ならびに試験システム |
JP2007113960A (ja) * | 2005-10-18 | 2007-05-10 | Kawamura Electric Inc | トラッキング検出装置 |
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