Title :
On fault tolerance for IPM-FSCW machines adopting a modular converter
Author :
Hui Zhang ; Wallmark, Oskar ; Leksell, Mats
Author_Institution :
Electr. Energy Conversion, KTH R. Inst. of Technol., Stockholm, Sweden
Abstract :
This paper investigates the fault-tolerant capability of a number of 30 kW permanent magnet (PM) machines with fractional-slot concentrated windings (FSCWs) when connected to two types of modular type converters recently proposed in the literature. Due to the strong PM rotor magnetization when using NdFeB-type magnets, the resulting short-circuit currents during a converter submodule short-circuit was found to be larger than the rated current which, potentially, may cause the machine to overheat. Reducing the PM rotor magnetization will reduce the short-circuit current but also affect the constant power speed range (CPSR). The results further highlight the importance of a tailored design specification when designing FSCW PM machines in automotive applications.
Keywords :
fault tolerance; hybrid electric vehicles; magnetisation; neodymium alloys; permanent magnet machines; power convertors; rotors; short-circuit currents; IPM-FSCW machines; NdFeB; NdFeB-type magnets; PM rotor magnetization; automotive application; constant power speed range; converter submodule; fault tolerance; fractional-slot concentrated windings; modular converter; permanent magnet machines; power 30 kW; short-circuit currents; Circuit faults; Fault tolerance; Ferrites; Rotors; Short-circuit currents; Torque; Windings; Fault-tolerant; fractional-slot; integrated; modular converter; permanent magnet machines; short-circuit currents;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2014 17th International Conference on
Conference_Location :
Hangzhou
DOI :
10.1109/ICEMS.2014.7013739
