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. This 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 degree (elec)
Variable-Frequency Synchronous Motor Drives for Electric Vehicles
Hybrid-Permanentmagnet-Synchronmotor mit Reluktanzkomponente als Antrieb mit variabler Frequenz für Elektrofahrzeuge
1995
8 Seiten, 15 Bilder, 1 Tabelle, 11 Quellen
Aufsatz (Konferenz)
Englisch
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