JP6639887B2 - 環境に優しい自動車のモーター減磁診断方法 - Google Patents
環境に優しい自動車のモーター減磁診断方法 Download PDFInfo
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Description
Claims (13)
- 環境に優しい自動車において発電作動時にバッテリーが充電されるモーターの永久磁石の不可逆減磁を診断する方法であって、
前記モーターの作動状態情報を取得する段階;
前記取得された前記モーターの作動状態情報から、前記モーターが発電作動している状態を含む診断進入条件を満足するかどうかを判断する段階;
前記診断進入条件を満足するとき、前記モーターの不可逆減磁の診断のために、前記モーターの発電作動によって前記バッテリーに充電される診断時のDC電流値情報を取得する段階;及び
前記取得された診断時のDC電流値情報を予め保存されている永久磁石の正常状態時のDC電流値情報と比較して不可逆減磁の発生有無を判断する段階を含み、
前記診断時のDC電流値が前記正常状態時のDC電流値に対して設定比率以下の場合、前記モーターの永久磁石の不可逆減磁が発生したと判断し、
前記設定比率の値をA、他の設定比率の値をB(B<A)とし、正常状態時のDC電流値に対する診断時のDC電流値の比率値をαとするとき(α=診断時のDC電流値/正常状態時のDC電流値)、前記不可逆減磁の発生有無を判断する段階で、B<α≦Aの状態であれば前記モーターの永久磁石の不可逆減磁の状態と判断し、診断時のDC電流値と正常状態時のDC電流値に基づいて補償された前記モーターのトルク指令値によって前記モーターの発電トルクを制御する不可逆減磁時のトルク補償制御を行うことを特徴とする、環境に優しい自動車のモーター減磁診断方法。 - 前記不可逆減磁時のトルク補償制御は、
前記正常状態時のDC電流値に対する診断時のDC電流値の比率値αから不可逆減磁時のトルク補償値を計算する段階;及び
前記不可逆減磁時のトルク補償値が反映されたトルク指令値によって前記モーターの発電トルクを制御する段階を含むことを特徴とする、請求項1に記載の環境に優しい自動車のモーター減磁診断方法。 - 前記トルク補償値は、正常状態の前記モーターの発電トルク制御のために、トルク指令とモーター速度によって正常状態時のトルク補償値が設定されているトルク補償テーブルのトルク補償値にトルク指令×(1−α)の値を加えた値に決定されることを特徴とする、請求項2に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記不可逆減磁の発生有無を判断する段階で、α≦Bの状態であれば、前記モーターの永久磁石の不可逆減磁故障を確定し、故障状態を運転者に知らせるための警告装置を作動させることを特徴とする、請求項3に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記永久磁石の正常状態時のDC電流値情報は、正常状態の同一モーターの作動状態が前記モーターの永久磁石の不可逆減磁診断のための前記診断進入条件と同一である条件を満足するとき、前記正常状態の前記モーターの発電作動によって前記バッテリーに充電されるDC電流値情報を、前記診断時のDC電流値情報の取得と同様な方法で取得して保存したものであることを特徴とする、請求項1に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記永久磁石の正常状態時のDC電流値情報は、車両出庫後の初期運行時に前記モーターの状態を正常状態と仮定し、初期運行時の前記モーターの作動状態が前記診断進入条件と同一である条件を満足するときに取得して保存したものであることを特徴とする、請求項5に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記モーターが、ハイブリッド自動車のエンジンに動力伝達可能に連結され、前記エンジンの始動及び発電作動の際に前記バッテリーを充電するハイブリッドスターター−ジェネレーター(HSG:Hybrid Starter and Generator)であることを特徴とする、請求項1に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記診断進入条件が、前記エンジンのアイドル運転状態で前記エンジンから伝達される回転力によって前記ハイブリッドスターター−ジェネレーターが発電作動するアイドル充電状態を含むことを特徴とする、請求項7に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記診断進入条件を満足する状態で、前記ハイブリッドスターター−ジェネレーターの発電作動によって前記バッテリーに充電されるDC電流値の設定時間以上のうちの平均値が診断時のDC電流値として求められることを特徴とする、請求項7に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記モーターが車両走行のための駆動源として使われる駆動モーターであることを特徴とする、請求項1に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記診断進入条件が、前記駆動モーターの発電作動状態である回生充電状態を含むことを特徴とする、請求項10に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記診断進入条件が、前記駆動モーターの回生充電が行われるうち前記駆動モーターに対するトルク指令が設定範囲1以下である条件と、前記駆動モーターの温度が設定範囲2以下である条件とをさらに含むことを特徴とする、請求項11に記載の環境に優しい自動車のモーター減磁診断方法。
- 前記診断進入条件を満足するとき、前記駆動モーターのトルク制御のためのトルク指令値を積算し、前記駆動モーターの発電作動によって前記バッテリーに充電されるDC電流値を積算し、前記トルク指令値を積算したトルク指令積算値が設定値に到逹するうちにDC電流値を積算したDC積算値が診断時のDC電流値として求められることを特徴とする、請求項10に記載の環境に優しい自動車のモーター減磁診断方法。
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