Power supply device
AssigneeHitachi Automotive Systems, Ltd.
InventorsTakayuki Oouchi, Takae Shimada, Fumihiro Sato, Shintaro Tanaka, Kenji Kubo, Eigo Kishimoto
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Abstract
An object of the present invention is to provide a highly efficient power supply device. A power supply device 1 according to the present invention includes a bidirectional DC-DC converter 3 and an insulated DC-DC converter 4. The bidirectional DC-DC converter 3 receives a main battery 5 and outputs a direct-current link voltage Vlink. The insulated DC-DC converter 4 receives the link voltage Vlink and supplies power to a load 7. The link voltage Vlink, which is an output of the bidirectional DC-DC converter 3, changes according to the output voltage of the insulated DC-DC converter 4.
Claims5
A power supply device comprising:
- a direct current to direct current (DC-DC) converter configured to supply power to a low voltage line;
- and
- a chopper configured to receive a voltage of a high voltage battery and output a link voltage to be input to the DC-DC converter,
- wherein the link voltage is changed according to a voltage of the low voltage line, and
- wherein a control response speed of the link voltage with respect to a voltage fluctuation of the low voltage line is slower than a fluctuation of the high voltage battery.
Dependencies are inferred from the claim text.