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F. Cigarini, S. Ito, S. Troppmair, G. Schitter:
"Comparison of a Voice Coil and a Hybrid Reluctance Actuator via FEM";
Vortrag: IEEJ International Workshop on Sensing, Actuation, Motion Control and Optimization (SAMCON), Tokyo (Japan); 06.03.2018 - 09.03.2018; in: "Proceedings of the IEEJ International Workshop on Sensing, Actuation, Motion Control and Optimization (SAMCON)", (2018), 6 S.

This paper compares a voice coil and a hybrid reluctance actuator for application in high-precision motion control
systems. For accurate evaluation, the finite element method (FEM) is employed to model the non-linear behavior of
the two actuators both in the static and in the frequency domain. The magnetic flux leakage and the motor constant KI
are adopted as the main comparison parameters. The results show that, in respect to the voice coil actuator, the hybrid
reluctance actuator is characterized by a higher value of KI (by a factor up to 9.6), which is however non-linearly
dependent on the position of the mover and on the coil current. Additionally, while the performance of the voice coil
actuator is independent from the frequency, for the hybrid reluctance actuator a magnitude slope (app. 􀀀14:4 dB/dec)
and a phase lag (app. 􀀀71 at f =10 kHz) is observed in the frequency response of KI ( j!) due to eddy currents in
the ferromagnetic system components. These results clearly indicate a trade-o between force intensity, linearity and
frequency response, which must be considered when selecting an actuator for the designed system.

Electromagnetic actuators, high-precision applications, finite element method