Restart control of an A.C. motor drive
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United States of America Patent
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N/A
Issued Date -
Dec 18, 2008
app pub date -
Jun 3, 2008
filing date -
Jun 18, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Method of and system for controlling the restart of an A.C. motor drive comprising an A.C. motor (4), a power converter (20, 21, 22) for stepless speed control of the A.C. motor and a load switch (3) arranged between the power converter and the A.C motor, wherein when the power converter (20, 21, 22) detects the output current to go below a predefined limit during the load switch opening it goes to a continuous output sensing mode, and when the output current goes above a predefined limit during the output sensing mode the power converter restarts automatically to a desired operating state.
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