Title :
Influence of magnetic losses on maximum power limits of synchronous permanent magnet drives in flux-weakening mode
Author :
Hoang, Emmanuel ; Gabsi, Mohamed ; Lécrivain, Michel ; Multon, Bernard
Author_Institution :
Ecole Normale Superieure de Cachan, CNRS, Cachan, France
Abstract :
The aim of this paper is to present the structure of a new synchronous machine with stator ferrite permanent magnets and a salient passive rotor (a robust and low-cost technology) which, when supplied with current by a three-phase bridge converter, produces continuous torque. This feature serves to place our machine on a par with the best synchronous machines available (e.g. high-energy rotor magnets with flux concentration). Furthermore, the electrical characteristics of this machine make it possible to apply the well-known flux weakening technique, which enhances the performance of the entire energy-conversion system. In theory, an operating area at constant power with unlimited speed can be obtained merely by taking into account the ohmic tension drops in the coils. Experimental results demonstrate that taking both magnetic losses and windage losses into account is necessary in order to identify the maximum mechanical output power characteristics
Keywords :
bridge circuits; ferrite devices; magnetic flux; magnetic leakage; permanent magnet motors; power convertors; rotors; stators; synchronous motor drives; continuous torque; energy-conversion system; flux weakening technique; flux-weakening mode; magnetic losses; maximum mechanical output power; maximum power limits; ohmic tension drops; salient passive rotor; stator ferrite permanent magnets; synchronous permanent magnet drives; three-phase bridge converter; windage losses; Bridges; Current supplies; Ferrites; Magnetic flux; Magnetic losses; Permanent magnets; Robustness; Stators; Synchronous machines; Torque converters;
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-6401-5
DOI :
10.1109/IAS.2000.881127