JP7160021B2 - 多相コンバータの制御装置及び電源システム - Google Patents
多相コンバータの制御装置及び電源システム Download PDFInfo
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- JP7160021B2 JP7160021B2 JP2019214564A JP2019214564A JP7160021B2 JP 7160021 B2 JP7160021 B2 JP 7160021B2 JP 2019214564 A JP2019214564 A JP 2019214564A JP 2019214564 A JP2019214564 A JP 2019214564A JP 7160021 B2 JP7160021 B2 JP 7160021B2
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- converter circuits
- circuits
- input current
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Classifications
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- H02M3/155—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 using semiconductor devices only
- H02M3/156—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
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- H02M3/156—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H02M3/1584—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
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- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
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- H—ELECTRICITY
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04858—Electric variables
- H01M8/04925—Power, energy, capacity or load
- H01M8/0494—Power, energy, capacity or load of fuel cell stacks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L2210/00—Converter types
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- B60L2210/14—Boost converters
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/52—Drive Train control parameters related to converters
- B60L2240/529—Current
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- H—ELECTRICITY
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Dc-Dc Converters (AREA)
Description
図1は、車両に搭載された燃料電池システム1の構成図である。燃料電池システム1は、電力制御系3、ECU(Electronic Control Unit)4、二次電池(以下、BATと称する)7、及び燃料電池スタック(以下、FCと称する)10含む。電力制御系3は、バッテリコンバータ(以下、BDCと称する)8、インバータ(以下、INVと称する)9、及び昇圧コンバータ(以下、FDCと称する)20を含む。尚、図1には示していないが、燃料電池システム1は、FC10に酸化剤ガス及び燃料ガスをそれぞれ供給する酸化剤ガス供給系及び燃料ガス供給系を備えている。また、車両には、走行用のモータMや、車輪W、アクセル開度センサ5、及びイグニッションスイッチ6を備えている。
図2は、FDC20の回路構成を示す図である。図2には、FC10とINV9についても示している。図2のように、FDC20は、コンバータ回路20a~20cとコンデンサ24とを備えている。コンバータ回路20aは、リアクトル21a、電流センサ22a、及びインテリジェントパワーモジュール(IPM:Intelligent Power Module)23aを含む。コンバータ回路20bは、リアクトル21b、電流センサ22b、及びIPM23bを含む。コンバータ回路20cは、リアクトル21c、電流センサ22c、及びIPM23cを含む。IPM23aは、スイッチング素子36a及びダイオード37aを含む。IPM23bは、スイッチング素子36b及びダイオード37bを含む。IPM23cは、スイッチング素子36c及びダイオード37cを含む。
図3Bは、一つのコンバータ回路20aのみが駆動している場合のリアクトル21aに流れる電流Iaの推移を示した図である。ECU4は、スイッチング素子36b及び36cを常時オフに維持し、スイッチング素子36aのみをオンオフ制御することによりコンバータ回路20aのみを駆動することができる。即ち、スイッチング素子36a~36cのうち常時オフに制御されるスイッチング素子の数を制御することにより、コンバータ回路20a~20cの駆動数を制御できる。図3Cは、FDC20への入力電流とコンバータ回路20a~20cの駆動数との関係を規定したマップである。図3Cに示すように、ECU4は、FDC20への入力電流が増大するほど、コンバータ回路20a~20cの駆動数を増大させる。コンバータ回路20a~20cのそれぞれには、入力電力から出力電力への変換効率のよい範囲が存在しており、その範囲でコンバータ回路20a~20cの少なくとも一つを使用できるように、FDC20への入力電流が増大するほどコンバータ回路20a~20cの駆動数を増大する。尚、例えばコンバータ回路20a~20cのうち1つのみが駆動する場合には、常に同じコンバータ回路20aが駆動されることに限られず、他のコンバータ回路20b又は20cに切り替えてもよい。コンバータ回路20a~20cのうち2つを駆動する場合も同様である。
ECU4は、所定の開始条件成立時にコンバータ回路20a~20cが異常か否かを診断する異常診断を実行する。具体的には、コンバータ回路20a~20cの全てが駆動した状態でリアクトル21a~21cのそれぞれを流れる電流値の平均値が正常範囲内にあるか否かに基づいて、コンバータ回路20a~20cが正常であるか異常であるかが診断される。
図4Cは、コンバータ回路20a~20cの各変換効率を示したグラフである。図4Cの横軸は、コンバータ回路20a~20cへの各入力電流を示し、縦軸はコンバータ回路20a~20cの各変換効率[%]を示している。即ち、コンバータ回路20a~20cの変換効率の特性は同じ場合を例に説明する。各変換効率は、入力電流が増大するほど徐々に増大して所定の入力電流値でピークとなり、更に入力電流が増大すると徐々に低下する。各変換効率は、入力電流の大きさに応じて例えば70~99%の値をとる。
I=(I*α/100)+(I*β/100)+(I*γ/100)…(1)
ηT=(ηα*α/100)+(ηβ*β/100)+(ηγ*γ/100)…(2)
ηT=ηα=ηI…(3)
ηT=(ηα/3)+(ηβ/3)+(ηγ/3)=(ηI/3/3)+(ηI/3/3)+(ηI/3/3)=ηI/3…(4)
図6は、ECU4が実行する異常診断制御の一例を示したフローチャートである。この制御は所定時間ごとに繰り返し実行される。ECU4は、異常診断の開始条件が成立したか否かを判定する(ステップS1)。異常診断の開始条件とは、例えば、(1)前回の異常診断が実行されてから所定時間が経過しており、(2)FC10への要求出力が安定している状態、即ち、FC10の要求出力が過渡的に変化する急加速や減速が行われていない状態であること、(3)FDC20が駆動している状態であることである。ステップS1でNoの場合には、本制御は終了する。
(デューティ比/100)≦1-(VL/VH)…(5)
VLは、コンバータ回路への入力電圧である。VHは、コンバータ回路からの昇圧後の出力電圧である。式(5)を満たす場合には不連続モードと判定でき、式(5)を満たさない場合には、連続モードであると判定できる。尚、上記の判定はこれに限定されず、不均等駆動処理の実行中に電流センサ22a~22cにより測定された各電流値が1周期内においてゼロになっている期間があるか否かで判定してもよい。また、ECU4は、不均等駆動処理の実行中にコンバータ回路20a~20cのうち全てが連続モードであった場合には、コンバータ回路20a~20cの少なくとも一つが又は全てが不連続モードとなるように分担率α、β、及びγを再度選択し直してもよい。また、不均等駆動処理の実行中にリアクトル21a~21cのうち少なくとも2つが連続モードであった場合には、少なくとも2つ又は全てが不連続モードとなるように分担率α、β、及びγを再度選択し直してもよい。また、コンバータ回路20a~20cの全て又は少なくとも一つが連続モードとなる分担率を、予めECU4のメモリに記憶されたマップから除外しておいてもよい。
4 ECU(多相コンバータの制御装置)
10 燃料電池スタック(電源)
20 昇圧コンバータ(多相コンバータ)
20a~20c コンバータ回路
21a~21c リアクトル
36a~36c スイッチング素子
Claims (6)
- 並列に接続されているN(N≧3)個の昇圧型のコンバータ回路を有した多相コンバータの制御装置において、
前記コンバータ回路の駆動数が1以上であってN-1以下の状態で、前記多相コンバータの異常診断の開始条件が成立したか否かを判定する判定部と、
前記開始条件が成立した場合には、前記多相コンバータへの入力電力に対する前記多相コンバータからの出力電力の比率を示す変換効率が、前記多相コンバータへの入力電流をN個の前記コンバータ回路に均等に分担した場合よりも高くなるように、前記入力電流をN個の前記コンバータ回路に不均等に分担するための、N個の前記コンバータ回路の各分担率を決定する決定部と、
決定された前記各分担率に従ってN個の前記コンバータ回路を駆動する駆動部と、
決定された前記各分担率に従ってN個の前記コンバータ回路が駆動した状態でN個の前記コンバータ回路の異常を診断する診断部と、を備えた多相コンバータの制御装置。 - 前記決定部は、前記開始条件が成立した場合での前記駆動数と同じ数だけの前記コンバータ回路の各分担率の合計が、N個の前記コンバータ回路の各分担率の合計の90%以上を占めるように、前記各分担率を決定する、請求項1の多相コンバータの制御装置。
- 前記決定部は、N個の前記コンバータ回路の少なくとも一つのリアクトルに電流が不連続で流れるように、前記各分担率を決定する、請求項1又は2の多相コンバータの制御装置。
- 前記決定部は、N個の前記コンバータ回路の全てのリアクトルに電流が不連続で流れるように、前記各分担率を決定する、請求項1乃至3の何れかの多相コンバータの制御装置。
- 請求項1乃至4の何れかに記載の多相コンバータの制御装置と、
前記多相コンバータと、
前記多相コンバータへ前記入力電力を供給する電源と、を備えた電源システム。 - 前記電源は、燃料電池スタックである、請求項5の電源システム。
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DE102020123182.2A DE102020123182A1 (de) | 2019-11-27 | 2020-09-04 | Steuerungsvorrichtung eines Mehrphasenwandlers und Leistungszuführsystem |
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US8836298B1 (en) * | 2013-08-15 | 2014-09-16 | Richtek Technology Corporation | Multi-phase switching regulator and control method thereof |
JP5929940B2 (ja) * | 2014-02-06 | 2016-06-08 | 株式会社デンソー | ハイブリッド車両 |
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JP6414533B2 (ja) * | 2015-10-16 | 2018-10-31 | 株式会社オートネットワーク技術研究所 | 多相コンバータ |
WO2017145305A1 (ja) | 2016-02-24 | 2017-08-31 | 本田技研工業株式会社 | 電源装置、機器及び制御方法 |
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