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Recent Developments of Electrical Drives - Part 15

Recent Developments of Electrical Drives - Part 15. The book stating the recent developments of electrical drives, can be useful for engineers and researchers investigating and designing electrical and electronic devices as well as for students and young researchers dealing with electrical and electronic engineering, computer sciences (advanced computer modelling, sophisticated control systems with artificial intelligence tools applied, optimal design bye use of classical and genetic algorithms employed), applied mathematics and all the topics where electromagnetic, thermal, mechanical phenomena occur | I-12. OPTIMIZATION OF A LINEAR BRUSHLESS DC MOTOR DRIVE Ph. Dessante1 J.C. Vannier1 and Ch. Ripoll2 Service EEI Ecole Supérieure d électricité Supelec Plateau de Moulon 91192 Gif sur Yvette France philippe.dessante@supelec.fr jean-claude vannier@supelec.fr 2Renault Research Center Guyancourt christophe. ripoll@renault.com Abstract. The paper describes the design of a drive consisting of a voltage supplied brushless motor and a lead-screw transformation system. In order to reduce the cost and the weight of this drive an optimization of the main dimensions of each component considered as an interacting part of the whole system is conducted. An analysis is developed to define the interactions between the elements inorder to justify the methodology. A specific application in then presented and comparisons are made between different solutions depending on different cost functions max power weight cost . . With this procedure the optimization is no longer limited to the fitting between separated elements but is extended to the system whose parameters are issued from the primitive design parameters of the components. Introduction The system studied in this paper is a linear electrical drive system realized with a voltage supplied brushless motor whose shaft is mechanically connected to a lead-screw drive device. The aim of this system is to drive a load along a linear displacement. The specifications concerning the load consist mainly in two parts. Firstly it has to apply a rather high static force at standstill as for instance to overcome some static friction force. Secondly it has to be driven from one point to another point in a given time. This second part implies a dynamic force and a maximum speed depending on the kind of displacement function is chosen. A discussion to chose the displacement function is important because as the motor will have a limited torque capacity it may be necessary not to accelerate neither too early nor too late when it is entering the .