| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly set an output voltage of a converter to increase vehicle driving force while evading an instrument fault in an electrical system of an electric vehicle including a converter to carry out variable control of DC side voltage of an inverter that performs drive control of an electric motor for vehicle drive. <P>SOLUTION: An ECU 30 includes: a current detecting means for detecting amplitudes of current applied to the electric motor; a margin calculation means for calculating a system voltage margin to a default value of the upper limit value of a system voltage that is set beforehand corresponding to the maximum value of the amplitude based on the margin of the detection value of the current detection means to the maximum value of the amplitude of the current applied to the electric motor; an upper limit value default value correction means for correcting the upper limit value by adding the calculated margin of the system voltage to a default value; and a voltage command value generation means for generating a voltage command value according to the driving force requested for the electric motor so that the system voltage VH does not exceed the corrected upper limit value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
