Method and apparatus for motor control
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United States of America Patent
Stats
-
Aug 30, 2005
Grant Date -
Feb 26, 2004
app pub date -
May 30, 2003
filing date -
Jun 3, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A closed-loop permanent magnet motor control method and system optimally partitions torque and flux-weakening currents to produce a desired torque without exceeding the capability of the DC source. A maximum limit for allowable torque current and a minimum threshold for the maximum torque current are determined, and the flux current is varied based at least in part on whether the maximum torque current limit is above or below the minimum threshold while operating in a flux-weakening region to compensate for the variability of the DC source voltage.
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