AC variable speed driving apparatus and electric vehicle using t

Details AC variable speed driving apparatus and electric vehicle using t AC variable speed driving apparatus and electric vehicle using t

1993-06-07

1994-11-15

Shoop, Jr., William M.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

318 49, 318 41, 318803, 318 47, H02P 154

Patent

active

053651537

ABSTRACT:
An AC variable speed driving apparatus including an AC motor and an inverter for driving the motor. The AC motor includes a synchronous motor and an induction motor. The synchronous motor includes first stator windings and a first rotor having a permanent magnet. The induction motor includes second stator windings and a second rotor. The first and second stator windings are disposed so that they do not magnetically interfere with each other. The first and second rotors are mounted on a common axis of rotation. The inverter supplies AC power to the stator windings so that the synchronous motor and the induction motor are driven independently. A highly efficient, large output and low cost system can be realized in a wide speed range.

REFERENCES:
patent: 3549965 (1970-12-01), Hausmann
patent: 3586938 (1971-06-01), LeGall
patent: 4392099 (1983-07-01), Kuniyoshi
patent: 4556809 (1985-12-01), Beisse et al.
patent: 5015938 (1991-05-01), Oehler et al.
patent: 5130617 (1992-07-01), Oshima et al.
patent: 5166582 (1992-12-01), Jaeger et al.
"An AC Servo Motor and Control of the same by a Micro-Computer", Sogou Denshi Publishing Ltd., Japan, 4th Edition, Jun. 10, 1989, pp. 74-83.
Watanabe, et al, "A Sensorless Detecting Strategy of Rotor Position and Speed on Permanent Magnet Synchronous Motor", The Journal of the Institute of Electric Engineers of Japan, vol 110-D, No. 11, 1990 pp. 1194-1200.

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