Losses Analysis of Direct Drive PM Generators Suffering from Demagnetization

S. Goh, A. S. Fawzal, S. Rasid, M. Mueller, K. N. Gyftakis

Research output: Contribution to conferencePaperpeer-review


Direct drive PM generators are critical machines and gain ground in the field of renewables, especially in remote applications. It is therefore important to guarantee their reliability and long uninterrupted operation. One faulty condition that may propagate over time, if undetected, is the demagnetization one. This paper studies the impact of partial demagnetization on the electromagnetic and thermal performance of PM generators. More specifically, the fault will create a magnetic imbalance leading to the creation of circulating currents in the stator coils. The circulating currents will in turn increase the machines’ losses and drop of efficiency and consequently increase the severity of the fault. Finally, the paper offers a fault severity analysis and relates it with the electromagnetic and thermal stress of the faulty PM machines.
Original languageEnglish
Number of pages7
Publication statusPublished - 13 Oct 2022
Event2022 International Conference on Electrical Machines (ICEM) - Valencia, Spain
Duration: 5 Sept 20228 Sept 2022


Conference2022 International Conference on Electrical Machines (ICEM)


Dive into the research topics of 'Losses Analysis of Direct Drive PM Generators Suffering from Demagnetization'. Together they form a unique fingerprint.

Cite this