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This paper investigates the cogging torque and torque ripple features of a permanent magnet flux switching (PMFS) integrated-starter-generator (ISG). The effects of the rotor pole arc width on cogging torque, torque ripple and output torque are first established using finite element analysis (FEA). Three torque ripple reduction techniques based on the optimization of three different rotor pole configurations...
The permanent magnet synchronous machine with an external rotor is the most important device for high performance electrical drive systems in particular for hybrid electric vehicles. With such an application, the machine will operate in a wide speed range and on the other hand with very fast changing loads in both motor and generator operational modes. The paper discusses finite element analyses for...
This paper presents a new double-stator directly driven permanent magnet machine for wind power generation. The machine configuration is so unique that it can significantly improve the torque density with small cogging torque. Because of the nature of double-stator windings, the machine can flexibly change their connections, hence providing a constant output voltage over a wide speed range for battery...
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