Force Density Improvements from Increasing the Number of Airgap Surface in Synchronous Linear Actuators

Pierre-Emmanuel Cavarec (1) , Hamid Ben Ahmed (1) , Bernard Multon (2)

1 SATIE - Systèmes et Applications des Technologies de l'Information et de l'Energie
2 SATIE SETE - Systèmes d'Energie pour les Transports et l'Environnement

This paper presents a realistic comparison of several electromagnetic architectures for high force density actuators. Four equivalent architectures are chosen and computed with a two-dimensional finite element model. For each architecture, size is optimised in order to maximise the force-volume ratio. This optimisation step is performed with a fixed mechanical airgap. A thermal model is then used to calculate the current density in the coils. Results show that global-coil architecture performance increases more sharply than other architectures; a scaling effect is thereby introduced for global-coil architectures. A global-coil multi-airgap actuator is presented to illustrate the theoretical results.

Domaines: Energie électrique

Pierre-Emmanuel Cavarec, Hamid Ben Ahmed, Bernard Multon. Force Density Improvements from Increasing the Number of Airgap Surface in Synchronous Linear Actuators. IEE Proceedings Electric Power Applications, 2003, Vol.150 (n°1), pp.106-120. ⟨10.1049/ip-epa:20020628⟩. ⟨hal-00674672⟩