Marie Ruellan

Electromagnetic resonant generator

In this paper, the authors present the energy production potential of a mechanically-resonant electrical generator system, which makes use of natural human walking movements. The characteristics associated with the human walk is discussed first, followed by the electromechanical modeling approach employed. The choice of electromechanical architecture is justified and the permanent magnet and moving coil structure can then be modeled and optimized. A demonstration device has also been generated and tested in order to validate the concept developed as well as the theoretical models derived.

Sizing Optimization of Tubular Linear Induction Generator and Its Possible Application in High Acceleration Free-Piston Stirling Microcogeneration

We usually find applications of rotary induction generator, direct-drive tubular linear permanent-magnet generator, etc. for the mechanoelectrical conversion process within Stirling microcogenerator systems. This paper presents the design optimization investigation for a direct-drive tubular linear induction generator for a dual free-piston Stirling microcogenerator system. On the one hand, a high oscillating frequency and a relatively long pistons travel bring about a very high acceleration of the generators moving part, up to 1018 m/s 2. On the other hand, the tubular linear induction generator offers many interesting assets in this application: low weight mover, appearance of levitation force, no mechanical spring, low mechanical losses, no cogging force, easy manufacture, very low investment and maintenance cost, and so on. However, the tubular linear induction generator is sparsely used, because of its a priori relatively low energetic efficiency. This paper presents a sizing optimization approach for maximizing the performance and demonstrates that, with an astute arrangement of electrical devices, the tubular linear induction generator can constitute a well adapted solution for free-piston Stirling microcogenerator systems.

PMSM optimal parameters for a specification sheet including motor and generator operation

The aim of this paper is to find the optimal circuit parameters of a permanent magnet synchronous machine (PMSM) for an electric or hybrid traction application. The problematic is first introduced. The PMSM model is presented. A discussion about the optimization objectives is presented in order to withdraw the most relevant ones. A multi-objectives and multi-constraints optimization using a genetic algorithm (NSGA-II) is eventually implemented in order to find the parameters values that optimize the selected criteria while respecting the specification sheet constraints.