Patent ID: 7268988
Filing Date: 2007-09-11
Classification: B62D,G01D

Abstract:
1. An apparatus comprising: a rotation-angle detection means for detecting a rotation angle of a rotating body based on an output signal generated by a resolver; an exciting-signal generation means for supplying an exciting signal for exciting the resolver to generate the output signal; an abnormality detection means for detecting an abnormality of an exciting-signal output terminal for outputting the exciting signal or an abnormality of an exciting-signal line for transmitting the exciting signal; and a power-supply stop means for stopping an operation of power supply to the exciting-signal generation means when the abnormality detection means detects an abnormality of the exciting-signal output terminal or detects an abnormality of the exciting-signal line, wherein the abnormality detection means detects a failure caused by a short circuit between a power-supply line and the exciting-signal output terminal or the exciting-signal line or a failure caused by a short circuit between a ground line and the exciting-signal output terminal or the exciting-signal line as an abnormality.