JP6528846B2 - 電力調整システム及びその制御方法 - Google Patents
電力調整システム及びその制御方法 Download PDFInfo
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- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
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Description
図1は、本発明の第1実施形態における燃料電池用の電力調整システム100(以下、単に「電力調整システム100」という)の全体構成を示す図である。本発明の電力調整システム100は、少なくとも燃料電池を駆動源とする車両に用いられるものである。この電力調整システム100は、図1に示すように、例えば、駆動モータ2で車両を駆動する電気自動車に搭載される。なお、この電力調整システム100は、燃料電池を駆動源とするものであれば、燃料電池車両(燃料電池を利用した電気自動車)以外の装置等の負荷にも適用することができる。
以下、本発明の第2実施形態について、第1実施形態との相違点を主として説明する。なお、電力調整システム100の全体構成及び燃料電池用コントローラ10の機能的構成は同様であるので、図1及び図2を用いて説明する。
Claims (7)
- 2つのコンバータを備える電力調整システムであって、
負荷に接続される燃料電池と、
前記燃料電池と前記負荷の間に接続され、該燃料電池の出力電圧を所定の要求電圧比で変換する燃料電池用コンバータと、
前記負荷に対して前記燃料電池と並列に接続され、該燃料電池とは異なる電力供給源であるバッテリと、
前記バッテリと前記負荷の間に接続され、該バッテリの出力電圧を所定の要求電圧比で変換するバッテリ用コンバータと、
前記電力調整システムの起動時に、前記燃料電池用コンバータの入力側と出力側とを直結状態とするコンバータ直結部と、
前記燃料電池の起動時に酸化剤ガスを供給することにより、前記燃料電池の出力電圧を所定電圧まで上昇させる燃料電池出力電圧上昇部と、
前記燃料電池出力電圧上昇部により前記燃料電池の出力電圧が前記所定電圧まで上昇する前に、前記燃料電池用コンバータの入力側電圧を前記所定電圧に調整するコンバータ入力電圧調整部と、
を備える電力調整システム。 - 請求項1に記載の電力調整システムであって、
前記コンバータ入力電圧調整部は、前記バッテリ用コンバータと前記コンバータ直結部とにより、前記バッテリの蓄電電力を用いて、前記燃料電池用コンバータの入力側電圧を前記所定電圧に調整する、
電力調整システム。 - 請求項1に記載の電力調整システムであって、
前記コンバータ入力電圧調整部は、前記コンバータ直結部の機能を停止し、前記バッテリ用コンバータと前記燃料電池用コンバータとにより、前記バッテリの蓄電電力を用いて、前記燃料電池用コンバータの入力側電圧を前記所定電圧に調整する、
電力調整システム。 - 請求項1から請求項3までのいずれか1項に記載の電力調整システムであって、
前記燃料電池の起動中における該燃料電池の出力電流を検出する電流センサと、
前記燃料電池の起動後、前記電流センサにより検出した出力電流が所定値以上に増加したか否かを判定する出力電流判定部と、
をさらに備え、
前記出力電流判定部により前記出力電流が所定値以上に増加したと判定した場合には、前記出力電流が所定値未満の場合に比べて、前記バッテリ用コンバータの電圧制御ゲインを上げる、
電力調整システム。 - 請求項1から請求項4までのいずれか1項に記載の電力調整システムであって、
前記電力調整システムの起動時には、前記コンバータ直結部は、前記燃料電池用コンバータを前記直結状態とし、前記バッテリの蓄電電力を用いて、前記燃料電池用コンバータの入力側電圧及び出力側電圧を同時に前記所定電圧まで昇圧させる、
電力調整システム。 - 請求項1から請求項4までのいずれか1項に記載の電力調整システムであって、
前記燃料電池用コンバータは、前記燃料電池の出力電圧を昇圧及び降圧するための複数のスイッチング素子を含み、
前記コンバータ直結部は、前記バッテリ用コンバータにより前記燃料電池用コンバータの出力側電圧を前記所定電圧に設定し、前記燃料電池用コンバータにより該燃料電池用コンバータの出力側電圧よりも入力側電圧を高い電圧値に設定することにより、該燃料電池用コンバータを前記直結状態とする、
電力調整システム。 - 負荷に接続される燃料電池と、
前記燃料電池と前記負荷の間に接続され、該燃料電池の出力電圧を所定の要求電圧比で変換する燃料電池用コンバータと、
前記燃料電池とは異なる電力供給源であるバッテリと、
前記バッテリと前記負荷の間に接続され、該バッテリの出力電圧を所定の要求電圧比で変換するバッテリ用コンバータと、
を備える電力調整システムの制御方法であって、
前記燃料電池用コンバータの入力側と出力側とを直結状態とするステップと、
前記燃料電池の出力電圧が所定電圧まで上昇する前に、前記燃料電池用コンバータの入力側電圧を前記所定電圧に調整するステップと、
前記燃料電池の起動時に酸化剤ガスを供給することにより、前記燃料電池の出力電圧を前記所定電圧まで上昇させるステップと、
を含む、
電力調整システムの制御方法。
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