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A new topology of hybrid synchronous machine

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6 Author(s)
Y. Amara ; Lab. d'Electr. Signaux et Robot., Ecole Normale Superieure de Cachan, France ; J. Lucidarme ; M. Gabsi ; M. Lecrivain
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Permanent-magnet synchronous machines are able to operate over a wide range of speeds at constant power through the use of control laws allowing for flux weakening. Generally, this is performed by applying a strong demagnetizing current in the d axis, yet such an approach involves the risk of irreversible magnet demagnetization and, consequently, a reduction in machine performance. This paper presents a novel structure for a hybrid synchronous machine. The authors' solution provides good flux weakening without introducing the risk of magnet demagnetization. In order to explain the structure's operating principle, they apply a model with a single elementary design; electromotive force measurements are then presented to demonstrate the possibilities of flux weakening, along with a series of simulations to show the contribution of hybrid excitation

Published in:

IEEE Transactions on Industry Applications  (Volume:37 ,  Issue: 5 )