Patent ID: 8154241
Filing Date: 2012-04-10
Classification: B62D

Abstract:
1. An in-vehicle electronic control apparatus for an electric power steering system, which includes a multi-phase rotary electric machine and a power conversion circuit connected to the rotary electric machine, the in-vehicle electronic control apparatus comprising: an energization control unit configured to control the power conversion circuit to a predetermined operation state to perform predetermined energization of the rotary electric machine; an abnormality detection unit configured to detect abnormality in at least one of the rotary electric machine and the power conversion circuit based on a detected rotation angle of the rotary electric machine caused by the predetermined energization; and a disconnection abnormality deduction unit configured to detect disconnection abnormality in an electric path connecting corresponding phases of the rotary electric machine and the power conversion circuit, wherein the energization control unit is configured to cause energization from one phase to a different phase of the rotary electric machine in the predetermined operation state, the one phase and the different phase being detected as having no disconnection abnormality by the disconnection abnormality detection unit, and wherein the abnormality detection unit is configured to detect short-circuit abnormality based on the detected rotation angle, the short-circuit abnormality being a short-circuit between the one phase or the different phase and a remaining phase other than the one phase or the different phase.