Variable-frequency synchronous motor drives for electric vehicles

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:419557

Chalmers, B J; Musaba, L ^[1]; Gosden, D F ^[2]

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1. Univ. of Manchester Inst. of Science and Technology (United Kingdom). Dept. of Electrical Engineering and Electronics
2. Sydney Univ., New South Wales (Australia). Dept. of Electrical Engineering

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{degree} (elec.).

• OSTI ID: 419557
• Report Number(s): CONF-9510203--
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
ELECTRIC MOTORS
ELECTRIC-POWERED VEHICLES
ENERGY EFFICIENCY
FREQUENCY CONTROL
SYNCHRONIZATION