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Mitigation of inverter-induced noncirculating bearing currents by introducing grounded electrodes into stator slot openings
(IEEE, 2020-12-23)
Modern converter-supplied AC motors are exposed to bearing currents. Despite extensive research and development, the industry still does not have a final solution with acceptable cost and high efficiency. This paper focuses ...
Mitigating noncirculating bearing currents by a correct stator magnetic circuit and winding design
(IEEE, 2020-04-06)
Different mechanisms by which bearing currents flow inside the electrical machine are well studied. In contrast, investigation and development of different techniques to mitigate these currents remain a field for improvement, ...
High-Speed Megawatt-Scale Induction-Motor Drives: Efficiency Maps and Drivetrains
(IEEE, 2022-10-13)
Selection of a proper drivetrain for a certain application is an important and challenging task. To make the right choice, several factors must be considered. The performance of an electrical drive system is among the ...
On the application of extended grounded slot electrodes to reduce non-circulating bearing currents
(IEEE, 2022-05-11)
Power-electronic-Inverterconverter-induced motor bearing currents are a widespread problem in the field of electrical drives. Parasitic capacitances between the electrical machines parts provide a path for leakage currents, ...
Irreversible demagnetization risk of rotor-surface-mounted permanent magnets at rated and short-circuit modes in two-pole multi-megawatt machines
(IEEE, 2023-09-12)
The flux density distribution of a rotor-surface-magnet two-pole 4 MW permanent-magnet synchronous machine with a solid rotor core is studied in three different operating modes: rated operation, two- and three-phase short ...