My poster for the dialogues session of the 42nd Annual Conference of IEEE Industrial Electronics Society (IECON) 2016, Firenze (Florence), Italy.

1. The 42nd Annual Conference of
IEEE Industrial Electronics Society
(IECON’2016)
Palazzo dei Congressi
Firenze (Florence) - Italy
October 24-27, 2016
Abstract
Power electronic interfaces
Results
Evaluation of different power electronic interfaces for control of a rotating brushless PM exciter
Jonas Kristiansen Nøland1,2, Fredrik Evestedt1, J. José Pérez-Loya1, Johan Abrahamsson1 and Urban Lundin1
1 Department of Engineering Sciences, Division of Electricity, Uppsala University, Uppsala 751 21, Sweden (e-mail: Jonas.Noland@Angstrom.uu.se)
2 Faculty of Technology and Maritime Sciences, Department of Engineering, University College of Southeast Norway, 3184 Borre, Norway (e-mail: Jonas.Noland@hbv.no)
A passive diode bridge is commonly used as the rotating interface on conventional
brushless excitation systems. Those systems are known to be slow dynamically,
since they cannot control the generator field voltage directly. Wirelessly controlled
power electronic interfaces on the shaft makes the brushless excitation system
comparable to the static excitation system. A proper interface should be selected.
This paper investigates torque ripple, power factor and ceiling voltage
capability at the nominal working point, for the proposed interfaces of study.
Constructed outer pole PM exciter
with synchronous generator below
Instantaineous torque with 50A excitation current through the field winding
Interface A: Thyristor-based
Interface B: Chopper-based
Interface C: Electrical drive
Conclusion
• Interface C produces sinusoidal current waveforms,
the highest ceiling voltage factor, unity power factor
and the lowest torque ripple.
• Interface B seems to be the best power electronic
solution for the designed PM exciter, yielding a
compromise between complexity and performance. It
has a huge benefit regarding few active switches and
the lack of need of a triggering circuit for the
rectification of the armature voltages.
• However, interface A lacks the need of a rotating
capacitor, yielding increased reliability.
Phase currents with 50A excitation current through the field winding
STEADY STATE PERFORMANCE OF THE DIFFERENT INTERFACES
Experimental setup: a) test-rig, b) external inductor, c) CAD