| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric-vehicle control device that suppresses inductive interference and torque shocks, when controlling the start-up of an inverter.SOLUTION: An arbitrary voltage pulse "VdP" is applied to an induction motor, while feedback control to a q-axis current is suppressed so as to generate a q-axis current "Iq". A frequency component is extracted from the generated q-axis current "Iq" so as to search for the amplitude value of the frequency component, ranging from the high-frequency side to the low-frequency side. The configuration is provided such as to extract a convex part having a prescribed difference from the high-frequency side to the low-frequency side, and a convex-part amplitude value that is the apex of the convex part and its frequency; as well as, to extract the amplitude maximum value which is the highest amplitude value and its frequency. The inverter frequency is estimated from the convex-part amplitude value and its frequency, as well as, the highest amplitude value and its frequency. |
