JP2007049791A - 車両の電源装置 - Google Patents
車両の電源装置 Download PDFInfo
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Abstract
【解決手段】 車両の電源装置は、第1の蓄電装置であるバッテリB1と、第2の蓄電装置であるバッテリB2と、インバータおよびモータを含む車両負荷と、第1、第2の蓄電装置の一方を選択して車両負荷に接続する選択スイッチRY0とを備える。好ましくは、第1の蓄電装置よりも第2の蓄電装置のほうが蓄電容量が大きい。また好ましくは、第2の蓄電装置よりも第1の蓄電装置のほうが出力可能最大電力が大きい。好ましくは、車両の電源装置は、第1、第2の蓄電装置の充電状態に応じて選択スイッチの切換を制御する制御装置60をさらに備える。制御装置60は、第2の蓄電装置の充電状態が所定レベルより低くなった場合に第2の蓄電装置を選択していた選択スイッチRY0に対して第1の蓄電装置に切換えるように指示する。
【選択図】 図1
Description
好ましくは、第2の蓄電装置よりも第1の蓄電装置のほうが出力可能最大電力が大きい。
図1は、この発明の実施の形態1に係る車両の概略ブロック図である。
電圧センサ73は、コンデンサC1の両端の電圧、すなわち、昇圧コンバータ10の入力電圧VLを検出し、その検出した電圧VLを制御装置60へ出力する。電圧センサ72は、コンデンサC2の両端の電圧、すなわち、昇圧コンバータ10の出力電圧VH(インバータ20,30の入力電圧に相当する。以下同じ。)を検出し、その検出した電圧VHを制御装置60へ出力する。
図2を参照して、制御装置60は、コンバータ制御部61と、第1のインバータ制御部62と、第2のインバータ制御部63と、AC入力制御部64とを含む。コンバータ制御部61は、バッテリ電圧VB1,VB2、電圧VH、トルク指令値TR1,TR2、およびモータ回転数MRN1,MRN2に基づいて昇圧コンバータ10のnpn型トランジスタQ1,Q2をON/OFFするための信号PWCを生成し、その生成した信号PWCを昇圧コンバータ10へ出力する。
図3を参照して、コンバータ制御部61は、インバータ入力電圧指令演算部112と、フィードバック電圧指令演算部114と、デューティー比演算部116と、PWM信号変換部118とを含む。
れる。その結果、トルク指令値TR1(またはTR2)に応じたモータトルクが出力される。
図5では、図1のインバータ20および30のうちのU相アームが代表として示されている。またモータジェネレータの3相コイルのうちU相コイルが代表として示されている。U相について代表的に説明すれば各相コイルには同相の電流が流されるので、他の2相の回路もU相と同じ動きをする。図5を見ればわかるように、U相コイルU1とU相アーム22の組、およびU相コイルU2とU相アーム32の組はそれぞれ昇圧コンバータ10と同様な構成となっている。したがって、たとえば100Vの交流電圧を直流電圧に変換するだけでなく、さらに昇圧してたとえば200V程度のバッテリ充電電圧に変換することが可能である。
図5、図6を参照して、まず電圧VAC>0すなわちラインACL1の電圧V1がラインACL2の電圧V2よりも高い場合には、昇圧コンバータのトランジスタQ1はON状態とされ、トランジスタQ2はOFF状態とされる。これにより昇圧コンバータ10は電源ラインPL2から電源ラインPL1に向けて充電電流を流すことができるようになる。
実施の形態1では2つのバッテリを搭載し、これらを切換えて用いるために選択スイッチRY0を用いた。実施の形態2では選択スイッチの変形例について説明する。
Claims (9)
- 第1の蓄電装置と、
第2の蓄電装置と、
車両負荷と、
前記第1、第2の蓄電装置の一方を選択して前記車両負荷に接続する選択スイッチとを備える、車両の電源装置。 - 前記第1の蓄電装置よりも前記第2の蓄電装置のほうが蓄電容量が大きい、請求項1に記載の車両の電源装置。
- 前記第2の蓄電装置よりも前記第1の蓄電装置のほうが出力可能最大電力が大きい、請求項1または2に記載の車両の電源装置。
- 前記選択スイッチの切換を制御する制御装置と、
運転者が前記制御装置に対して前記選択スイッチの切換を指示するための入力装置とをさらに備える、請求項1〜3のいずれか1項に記載の車両の電源装置。 - 前記選択スイッチの切換を制御する制御装置と、
運転者が前記制御装置に対して前記第2の蓄電装置の使用を前記第1の蓄電装置の使用よりも優先させる指示をするための入力装置とをさらに備える、請求項1〜3のいずれか1項に記載の車両の電源装置。 - 前記第1、第2の蓄電装置の充電状態に応じて前記選択スイッチの切換を制御する制御装置をさらに備え、
前記制御装置は、前記第2の蓄電装置の充電状態が所定レベルより低くなった場合に前記第2の蓄電装置を選択していた前記選択スイッチに対して前記第1の蓄電装置に切換えるように指示する、請求項1〜3のいずれか1項に記載の車両の電源装置。 - 車両の外部から与えられる電力を受けて少なくとも前記第2の蓄電装置に充電を行なうための入力部をさらに備える、請求項1に記載の車両の電源装置。
- 前記車両負荷は、
第1の回転電機と、
前記第1の回転電機に対応して設けられる第1のインバータと、
第2の回転電機と、
前記第2の回転電機に対応して設けられる第2のインバータとを含み、
前記入力部は、
前記第1の回転電機に接続される第1の端子と、
前記第2の回転電機に接続される第2の端子とを含み、
前記車両の電源装置は、
前記第1、第2の端子間に与えられる交流電力が直流電力に変換されて前記第2の蓄電装置に与えられるように前記第1、第2のインバータに対して制御を行なう制御装置をさらに備える、請求項7に記載の車両の電源装置。 - クランク軸が前記第1の回転電機の回転軸に機械的に結合された内燃機関をさらに備え、
前記第2の回転電機の回転軸は、車輪の回転軸と機械的に結合される、請求項7に記載の車両の電源装置。
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