公开(公告)号：US20240154548A1

公开(公告)日：2024-05-09

申请号：US18054047

申请日：2022-11-09

Applicant: DANA TM4 ITALIA S.R.L.

Inventor： Walter FAEDO ,  Riccardo BICEGO

IPC: H02P6/18 ,  H02K1/2781

CPC classification number: H02P6/18 ,  H02K1/2781 ,  H02K2201/03

Abstract: Methods and systems are disclosed for monitoring rotor flux linkage of a rotor via a monitoring mode and resetting rotor flux linkage of the rotor via a resetting mode. As one example, monitoring rotor flux linkage includes measuring rotor flux linkage generated by rotor magnets at an air gap of the motor continuously during run-time via a plurality of models and various system components. As another example, resetting rotor flux linkage includes ensuring motor movement ceases and injecting a positive pulse d-axis current for a plurality of motor pole pairs in response to rotor flux linkage not being within a pre-determined threshold. In this way, magnets with low remanent flux density and low coercivity may be utilized in various embodiments of electric motors, reducing design complexity of a rotor of an electric motor, and in turn, reducing production costs.