| 摘要 |
PROBLEM TO BE SOLVED: To diagnose offset of a resolver of an electric machine.SOLUTION: Predetermined offset of a resolver of an electric machine is acquired. In a first transient state, excitation current is supplied to a plurality of phases of the electric machine, so that injection of exploring excitation current on an axis d of a minimum reluctance of the electric machine is determined. A position of the axis d is determined as a function of the predetermined offset of the resolver. In second and third transient states, respectively, the excitation current is supplied to a plurality of phases of the electric machine, so that injection of the exploring excitation current on the axis d of the electric machine is determined. The position of the axis d is determined as the function of the offset of the resolver, the offset of the resolver changes so as to exceed or get short by a predetermined amount of deviation with respect to the predetermined offset of the resolver. As a result of the excitation current, a current established on the axis d of the minimum reluctance, and a current established on an axis q having a quadrature phase to the axis of the minimum reluctance, are determined.SELECTED DRAWING: Figure 2 |
