High frequency exciter of electrically excited synchronous motors for vehicle applications
Paper in proceeding, 2016

Future electric vehicles requires electric motors with excellent torque-speed characteristics, high efficiency, and low costs. Equipped with controllable rotor flux, electrically excited synchronous motors are able to provide high torque at low speed and high efficiency at high speed. However, brushes and slip rings for field windings need maintenance and may influence reliability. In this paper a brushless power transferring approach through a high frequency rotating exciter is presented. Compared with conventional rotating exciters, the high frequency exciter is much more compact and energy efficient due to high energy conversion frequency. This enables the exciter to be integrated in the rotor and provides opportunities for electrically excited synchronous motors to compete with other motors in vehicle applications. A prototype of the rotating exciters with SiC based converter, Litz wire, and shaft-end mounting structure has been built and measured in standalone tests and combined tests with a synchronous machine.

magnetic cores


energy conversion

electric vehicles

electric motors

DC-AC power converters


Yujing Liu

Chalmers, Energy and Environment, Electric Power Engineering

Daniel Pehrman

Chalmers, Energy and Environment, Electric Power Engineering

Odyssefs Lykartsis

Chalmers, Energy and Environment, Electric Power Engineering

Junfei Tang

Chalmers, Energy and Environment, Electric Power Engineering

Tony Liu

Royal Institute of Technology (KTH)

Proceedings - 2016 22nd International Conference on Electrical Machines, ICEM 2016. Lausanne; Switzerland; 4-7 September 2016

978-1-5090-2538-1 (ISBN)

Areas of Advance


Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering





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