| 摘要 |
<P>PROBLEM TO BE SOLVED: To discriminate the abnormality of a first voltage sensor which detects the battery side voltage of a boost converter from the abnormality of the overvoltage of a battery, and to achieve much more appropriate control in a power system for supplying a voltage from a battery to an invertor by booting it by a boost converter, and for supplying the voltage from the battery to an auxiliary unit by decreasing it by a DC/DC converter. <P>SOLUTION: Even when a battery side voltage VL1 from a first voltage sensor becomes equal to or more than a voltage Vref for decision, and the generation of any temporary abnormality is decided (step S100, S110, S130), a battery side voltage VL2 from a second voltage sensor which detects a battery side voltage VL2 of a DC/DC converter is compared with a voltage Vref for decision. Thus, it is possible to discriminate overvoltage abnormality and the abnormality of a first voltage sensor (step S150 to S200), and to control the invertor or a boost converter based on the discrimination result (steps S140, S180, S210). <P>COPYRIGHT: (C)2010,JPO&INPIT |
