| 摘要 |
The present invention relates to the field of electric-motor-driven vehicles such as cars, motorcycles, scooters, electric-motor trains, etc. Embodiments of the invention seek to provide an economic all-wheel-drive (AWD) vehicle possessing high dynamic characteristics and a relatively simple scheme of control over the operation of electric motors. An AWD vehicle according to the disclosed invention contains at least two gearless (direct-drive) electric motors, an electric power supply source, and an electric motor power supply control unit. At least one of said motors is a start-up (barring) motor and at least one is a cruise (propulsion) motor. Each of said motors comprises (i) at least one circular magnetic conductor on which an even number of permanent magnets are uniformly arranged with a certain pitch; (ii) a circular frame separated from said magnetic conductor by an air gap and bearing an even number of electromagnets arranged in pairs one opposite to another; and (iii) a device switching the polarity of voltage applied to said electromagnets. Each pair of electromagnets situated one opposite to another corresponds to a certain phase of the electric motor, the number (m1) of phases in the start-up electric motor and the number (m2) of phases in the cruise electric motor obey the relation m1>m2. It is also desired that the number (n1) of permanent magnets in the start-up electric motor and the number (n2) of permanent magnets in the cruise electric motor would obey the relation n1>n2. The power supply control unit can feed each electric motor separately and independently.
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