Faults in hybrid electric vehicles' permanent magnet machines

Abstract

Nowadays, automobile transportation is in a crisis due to the high price of gasoline and, in the future, the crises will worsen unprecedentedly. Hence, researches are oriented toward hybrid electric vehicles being a good alternative of conventional vehicles. Thus, assuring the health and proper operation of HEVs is a mission. This paper focus on the importance of HEV's permanent magnet machine fault identification where a survey of the different types of fault that may arise is illustrated, relating it to the useful parameters that should be measured and checked to detect the presence of each type of fault. The faults are classified according to their level of severity; a case study is conducted where it is shown that demagnetization of magnet is the most sever fault taking into consideration the relative cost of magnet and the occurrence percentage of demagnetization. Index Terms -Hybrid electric vehicle, permanent magnet machine, Faults.

Extension of Winding Function Theory for Modeling and Diagnosis of Partial Demagnetization Fault in PMSM Drive

“…This early detection increases the life of these motors, thus minimizing financial losses due to the unscheduled shutdown of the production chain [1][2][3]8]. Among these faults, the demagnetization of the Permanent Magnet (PM) is one of the most critical faults in PMSM, due to their relatively high cost which represents approximately 50 % of the total cost of the machine [3,9]. This type of fault can occur during abrupt load applications or in the presence of the short-circuit fault in the stator windings.…”