Technology for compensating an abnormal output of a resolver for an environmentally friendly vehicle

摘要

A technique for compensating for an abnormal output of a resolver will be described. More specifically, a central processing unit (CPU) sets a current motor position angle before compensation θn, ORG as a current motor position angle θn, and obtains a motor position change Δθn [rad] between a current sample [n] and a previous sample [n-1]. 1] and a motor position change Δθn-1 [rad] between the previous sample [n-1] and a previous sample [n-2]. Subsequently, a variable A is calculated based on the above angle. The CPU determines whether to perform the compensation by comparing the calculated variable A and a calibration variable K, and calculates a current motor position angle for compensation θn [rad]. Finally, the CPU compensates for the absence of the motor rotor position information with the calculated current motor position angle for compensation θn [rad].