| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a torque shock caused by change of a sign of a drive force for traveling. <P>SOLUTION: A value of a slow variation treating flag FO is checked (S110) which takes a value 1 when the slow variation treatment is performed for slowly varying required torque when the sign of the required torque to be output to a drive shaft, when the flag FO is a value 1, frequency fc2 higher than ordinarily used frequency fc1 is set (S130) as carrier frequency fc that switches the transistor of a boost converter. Switching of the transistor of the boost converter is performed at the carrier frequency fc to which the frequency fc2 is set. Thus, voltage to the more boosting side than the boost converter is stabilized, the controllability of a motor driven by the power of the boosting side is increased, to allow the slow variation treatment at a high preciseness. As a result, the torque shock caused by looseness of a gear occurring when the sign of the required torque changes is suppressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
