公开(公告)号：US09821679B2

公开(公告)日：2017-11-21

申请号：US14823601

申请日：2015-08-11

Applicant: MAGNETI MARELLI S.p.A.

Inventor： Andrea Stefani ,  Alessandro Fossi ,  Roberto Betro' ,  Marco Raimondi ,  Canio Caterini

IPC: H02P21/00 ,  H02P6/10 ,  H02P6/16 ,  B60L15/02 ,  H02K11/00 ,  H02P6/18 ,  H02P21/32 ,  G01D5/20 ,  G01D5/244

CPC classification number: B60L15/025 ,  B60L3/0038 ,  B60L3/0061 ,  B60L3/12 ,  B60L2220/14 ,  B60L2220/16 ,  B60L2240/421 ,  B60L2240/427 ,  B60L2240/429 ,  G01D5/2073 ,  G01D5/2448 ,  H02K11/0031 ,  H02K11/225 ,  H02P6/183 ,  H02P21/32 ,  H02P2203/11

Abstract: A method for the diagnosis of the offset of the resolver of an electric motor, comprising acquiring a predetermined offset of a resolver associated with the electric motor; in a first transient, supplying an excitation current to the phases of the electric motor. As a consequence of the excitation current, a current established on the axis d of minimum reluctance and a current established on an axis q in phase quadrature with respect to the axis of minimum reluctance are determined. The correctness of the offset of the resolver is diagnosed if the current established on the axis d in the first transient is higher than the current established on the axis d in the second or third transient, and if the current established on the axis q in the first transient is lower than the current established on the axis q in the second or third transient.