AC variable speed driving apparatus and electric vehicle using the same
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United States of America Patent
Stats
-
Nov 15, 1994
Issued Date -
N/A
app pub date -
Jun 7, 1993
filing date -
Jun 10, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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