Dimitrios Ladas

Sensorless position detection of a linear actuator using the resonance frequency

This paper presents a method to detect the position of a linear actuator without any position sensor. The actuator winding has a resonance frequency that is very related to the position of the linear actuator moving part. A sinusoidal scan voltage is superposed to the main voltage. Its frequency is close to the resonance frequency and therefore it is possible to measure the resulting scan current amplitude that allows position detection.

Optimization design of a linear actuator using a genetic algorithm

This paper presents a method to optimize two linear actuator configurations. The method is stochastic and combines a genetic algorithm (GA) and FEM (Finite element method) model generated with the commercial software FEMM. The optimization is performed in order to respect the load curve and speed references during opening and closing of the actuator.

About tuning capacitors in inductive coupled power transfer systems

Inductive Coupled Power Transfer (ICPT) is a widely used technique to transfer electrical power from a power supply to one or more load(s) without any physical link. Even with large airgaps between primary and secondary coils, a very high power transfer efficiency can be reached if the reactive energy stored in the coils is compensated. Several compensation strategies could be used depending on the application. In this paper, the classical compensation is compared to new control-oriented one. A 200W prototype has been realised in order to validate the models developed.