| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric vehicle which can promptly make an appropriate response when performance deterioration of a permanent magnet of a motor, such as demagnetization, occurs. <P>SOLUTION: An inverter device 22 or an ECU 21 includes: magnetic force estimation means 38 estimating magnetic force of a permanent magnet of a rotor of a motor 6; determination means 39 for the estimated magnetic force; and abnormality correspondence motor drive control means 40. The magnetic force estimation means 38 estimates magnetic force from at least two detection signals out of a motor rotational frequency, motor voltage and motor current in accordance with predetermined rules. The determination means 39 determines whether or not the estimated magnetic force is within a set allowable range. The abnormality correspondence motor drive control means 40 restricts motor drive by the inverter device 22, in accordance with a determination result indicating an abnormality by the determination means 39. <P>COPYRIGHT: (C)2012,JPO&INPIT |
