The drivetrains of large transportation systems, such as aircraft or ships, are evolving towards hybrid turbo-electric solutions with DC primary power distribution, aiming to reduce the related greenhouse gas emissions. Synchronous Homopolar Generators (SHGs) equipped with front-end diode rectifiers are a promising technology for on-board generation units. Following the work presented in previous publications, the design of a 2 kW@6000 rpm concept demonstrator is here refined by means of 3D-FE analysis, considering both no-load and load operation. A direct-cooled solenoid excitation coil provides the full voltage-control capability of two independent 400 V DC-buses supplied via the diode rectifiers. The electromagnetic design choices are focused on the minimisation of the DC-bus voltage ripple. The multi-physics design of the field winding considers both electromagnetic and thermal aspects, which are validated through CFD analysis.

Design of a Dual DC-Bus Homopolar Generator Implementing a Direct-Cooled Excitation Coil

Amedeo Vannini
Primo
;
Alessandro Marfoli;Luca Papini;Paolo Bolognesi
Penultimo
;
2023-01-01

Abstract

The drivetrains of large transportation systems, such as aircraft or ships, are evolving towards hybrid turbo-electric solutions with DC primary power distribution, aiming to reduce the related greenhouse gas emissions. Synchronous Homopolar Generators (SHGs) equipped with front-end diode rectifiers are a promising technology for on-board generation units. Following the work presented in previous publications, the design of a 2 kW@6000 rpm concept demonstrator is here refined by means of 3D-FE analysis, considering both no-load and load operation. A direct-cooled solenoid excitation coil provides the full voltage-control capability of two independent 400 V DC-buses supplied via the diode rectifiers. The electromagnetic design choices are focused on the minimisation of the DC-bus voltage ripple. The multi-physics design of the field winding considers both electromagnetic and thermal aspects, which are validated through CFD analysis.
2023
979-8-3503-9899-1
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1247549
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