Publication
Linear motors for Multi Mobile Systems
Résumé
In large cities, due to expensive land price, high-rise buildings are built, in which the space dedicated to the elevators is considerable and reduces the rented surfaces. To decrease these lost surfaces, a Multi Mobile System is proposed: it consists of several moving cabins in the same shafts permitting also horizontal motions. In this case, the use of direct linear motor drives without counterweight is requested. But it implies high mechanical power and energy consumption. A system design optimization permits to obtain a positive return of investment. This paper focuses on linear motors to move the cabins. Multi criteria system and motor designs are presented. Finally, the economical balance emphases the interest of Multi Mobile Systems.
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Concepts associés (15)
Induction motor
An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor can therefore be made without electrical connections to the rotor. An induction motor's rotor can be either wound type or squirrel-cage type. Three-phase squirrel-cage induction motors are widely used as industrial drives because they are self-starting, reliable, and economical.
DC motor
A DC motor is an electrical motor that uses direct current (DC) to produce mechanical force. The most common types rely on magnetic forces produced by currents in the coils. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. DC motors were the first form of motors widely used, as they could be powered from existing direct-current lighting power distribution systems.
Moteur sans balais
Un moteur sans balais, ou « moteur brushless », ou machine synchrone auto-pilotée à aimants permanents, est une machine électrique de la catégorie des machines synchrones, dont le rotor est constitué d'un ou de plusieurs aimants permanents et pourvu d'origine d'un capteur de position rotorique : capteur à effet Hall, synchro-résolver, codeur rotatif (par exemple codeur incrémental), ou tout autre système permettant l'auto-pilotage de la machine. Vu de l'extérieur, il fonctionne en courant continu.
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