The performance capability envelope of a variable-frequency, permanent-magnet synchronous motor drive with field weakening is dependent upon the product of maximum current and direct-axis inductance. To obtain a performance characteristic suitable for a typical electric vehicle drive, in which short-term increase of current is applied, it is necessary to design an optimum value of direct-axis inductance. The paper presents an analysis of a hybrid motor design which uses a two-part rotor construction comprising a surface-magnet part and an axially laminated reluctance part. This arrangement combines the properties of all other types of synchronous motor and offers a greater choice of design variables. It is shown that the desired form of performance may be achieved when the high-inductance axis of the reluctance part is arranged to lead the magnet axis by 90 degrees (elec.).
Variable-frequency synchronous motor drives for electric vehicles
Ein drehzahlveränderbarer Synchronmotor mit Doppelläufer für Elektrofahrzeuge
IEEE Transactions on Industry Applications ; 32 , 4 ; 896-903
1996
8 Seiten, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
Variable-Frequency Synchronous Motor Drives for Electric Vehicles
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