Method of starting a motor
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United States of America Patent
Stats
-
Mar 7, 1995
Grant Date -
N/A
app pub date -
Sep 9, 1993
filing date -
Sep 11, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of starting a motor comprising a first starting step of supplying an exciting current to armature coils, a first holding step for holding the exciting current after the first starting step, a second starting step of supplying an exciting current to the armature coils after the first holding step, a second holding step of holding this exciting current after the second starting step, and a third starting step of supplying an exciting current to the armature coils after the second holding step. In this method, the frequency f.sub.1 of the first holding step is larger than the characteristic frequency F.sub.0 of the rotation system of the motor (f.sub.1 >F.sub.0) and the frequency f.sub.2 of the second holding step is smaller than the characteristic frequency F.sub.0 of the rotation system (f.sub.2
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