Variable speed controllable induction motor
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United States of America Patent
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-
Jul 31, 1990
Grant Date -
N/A
app pub date -
Jul 12, 1988
filing date -
Jul 14, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable speed controllable induction motor comprises a single rotor formed in one-piece having different sets of rotor conductive members effective respectively at different speed ranges, that is, at least a set of first conductive members specifically effective for a lower speed range and a set of second conductive members specifically effective for a higher speed ranges; a plurality of stators disposed side by side surrounding and facing respective portions of said rotor; and a phase shifting apparatus for producing phase differences on the respective portions of the rotor conductive members. The motor can achieve an overall wide range speed control due to the combined effects of the characteristics obtained respectively from the different set of the rotor conductive members.
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