| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a four-wheel drive control unit which has a function to suppress voltage rise quickly since when an inverter for motor drive stops the operation, voltage of a direct current link section of a rectifier output rises excessively, and there is a problem to damage a peripheral circuit part in a hybrid four-wheel drive car which has a main driving wheel driven by an engine and a sub driving wheel driven by a motor. <P>SOLUTION: This control unit is composed to monitor the voltage of the direct current link section which starts to rise at the same time when the inverter stops the operation, reverse the direction of the current to be applied to the field winding wire of an alternator when reached the predefined voltage, and intercept this current after flowing a predetermined period. Therefore, voltage rise after stopping of inverter operation is suppressed quickly, and use parts of small power can be used. <P>COPYRIGHT: (C)2008,JPO&INPIT |
