A4 Conference proceedings

Mechanical design of rotor-bearing system in a high-speed 20 kW range extender for battery electric vehicles

Publication Details
Authors: Kim Heesoo, Nerg Janne, Jaatinen-Värri Ahti, Pyrhönen Juha, Sopanen Jussi
Publication year: 2020
Language: English
Title of parent publication: Proceedings of the 12th Virtual Conference on Vibrations in Rotating Machinery (VIRM)
ISBN: 978-0-367-67742-8
eISBN: 978-1-003-13263-9
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication


Electrification of transportation is one of the most effective means to reduce emissions. However, widespread adoption of electric vehicles faces challenges because of the limited availability of raw materials of batteries. Because of these concerns, hybrid electric technology is seen as an alternative. This paper presents the mechanical design for a rotor-bearing system of a 20 kW micro-gas-turbine-based range extender (RE). The RE has an integrated permanent magnet highspeed electric generator. Rotordynamic analysis is conducted for a rotor supported by ball bearings and squeeze film dampers (SFD). From the results, requirements for the SFD design are defined.

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Last updated on 2021-16-03 at 12:47