| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem: there is the possibility of impossible discharge control of a capacitor 16 when a vehicle has a collision. <P>SOLUTION: A series regulator 40 steps down a voltage of a capacitor 16 and outputs the stepped-down voltage to a drive unit DU of a U-phase lower arm. A flyback converter FBd for discharge control outputs electric power to a drive unit DU of a U-phase upper arm with the output of the series regulator 40 as an input. When a collision is detected, a photocoupler 54 is turned off, so that the series regulator 40 is turned on to start discharge control. At this time, power supply to overcurrent protection means and overheat protection means of the drive unit DU is prohibited. <P>COPYRIGHT: (C)2012,JPO&INPIT |
