PROBLEM TO BE SOLVED: To provide comfortable steering feeling to a driver, even in a case where power required by an assist motor (steering assist motor) 16 rapidly increases.SOLUTION: An electric power steering device 11 includes: a main power supply unit 27 capable of supplying power to a load; an auxiliary power supply unit 29 connected to the main power supply unit 27 and capable of supplying charged power to the load; a boosting circuit 30 capable of boosting a voltage supplied from the main power supply unit 27 and applying a resulting voltage to the auxiliary power supply unit 29; a circuit switching unit 41 interposed between the main power supply unit 27 and the load and closing one of a first connection circuit 51 extending from the main power supply unit 27 to the load and a second connection circuit 53 extending from the main power supply unit 27 to the load via the auxiliary power supply unit 29; and a controller 33 performing switching control on the circuit switching unit 41. The controller 33 performs the switching control on the circuit switching unit 41 on a side to close the second connection circuit 53 if the magnitude of power required by the load exceeds a first threshold.SELECTED DRAWING: Figure 1
【課題】アシストモータ(操舵補助用モータ)16に係る電力需要が急増した場合であっても、快適な操舵フィーリングを運転者に付与する。【解決手段】電動パワーステアリング装置11は、負荷に電力を供給可能な主電源部27と、主電源部27に接続され、充電電力を負荷に供給可能な補助電源部29と、主電源部27から供給される電圧を昇圧して補助電源部29に印加可能な昇圧回路30と、主電源部27及び負荷の間に介在するように設けられ、主電源部27から負荷に至る第1接続回路51、又は、主電源部27から補助電源部29を介して負荷に至る第2接続回路53のうちいずれか一方を閉じる回路切替部41と、回路切替部41の切替え制御を行う制御部33と、を備える。制御部33は、負荷に係る需要電力の大きさが第1閾値を超える場合に、第2接続回路53を閉じる側に回路切替部41の切替え制御を行う。【選択図】図1
POWER SUPPLY DEVICE AND ELECTRIC POWER STEERING DEVICE INCLUDING POWER SUPPLY DEVICE
電源装置、及び電源装置を備える電動パワーステアリング装置
2017-07-27
Patent
Elektronische Ressource
Japanisch
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